Rust under car paint what to do. car corrosion

Rust on the body inevitably appears over time, even if your body is galvanized and has additional protection. However, not many people know how to prevent such a phenomenon, to extend the life of the body, because the body is the main part of the car. What to do with rust on the body if it appears - eliminate it as soon as possible, simply smearing with spray paint is not an option.

What does it come from

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To begin with, let's figure out what the body of any car is. This is a thin sheet metal structure, the body of which is often made of different alloys, and also has many welded joints. In addition, the case is also used as a "minus" in onboard network machine, which means that it is constantly conducting current. Therefore, it simply cannot not rust!

How rust occurs

Metal corrosion is the process of its oxidation by oxygen when exposed to water. Many motorists do not know how to remove rust from the body, so they try to cover the rust with paint or blow it out with a can, while the destruction continues. Rusting of the car body belongs to the classical form - electrochemical corrosion.
However, exposure to air and water is not the whole problem. In addition to standard and unavoidable chemical processes, the main role here is played by the emerging galvanic couples between chemically inhomogeneous surfaces.

Don't wait for a small spot to become a big hole. Do not be afraid of the words "galvanic couple", I'm not going to load you with lectures on chemistry, you won't have to learn complex formulas. In our article, the term "galvanic couple" is just a junction of two different metals. There are more active and less active metals. When a galvanic pair occurs, the more active metal is destroyed and the more passive metal is restored due to it. A simple experience nails iron and copper in an electrolyte solution - iron quickly decomposes, copper does not touch corrosion. And if you put aluminum wire with an iron nail, then aluminum decomposes. This phenomenon in chemistry has a name - "inadmissible galvanic couple". For example, aluminum with copper, nickel with silver, magnesium with steel and others. In close connection with electricity, they will very quickly "devour" one another. That is why it is forbidden to connect copper wires with aluminum in electrical wiring. There are many places in the car body where galvanic couples occur. As a rule, "Invalid" is avoided, so "normal" ones arise. At welding points, if the body panels are made of different metal, between different fasteners and assemblies (copper, brass, stainless bolts and an iron body). Even at different points on the same plate, which has different machining. Between all of them, a potential difference constantly arises, and in the presence of an electrolyte, through corrosion of the body will also appear if measures are not taken in a timely manner.

Electrolyte

Some motorists immediately remember that this is a caustic liquid that is usually used in batteries. However, they are only partially right. An electrolyte is any liquid substance that conducts electricity. Batteries use a weak solution of hydrochloric acid, it is not at all necessary to douse the case with acid, for the appearance of corrosion. The function of the electrolyte is performed ordinary water. In the "distilled" form, water is not an electrolyte, but in nature, water is not so pure. Therefore, under the influence of water in a galvanic pair, the accelerated destruction of the metal from the positively charged side begins. This is what causes rust on the body. What to do?

You cannot cancel the reaction of metals to each other, but you can (and even need to) exclude the electrolyte from this circuit. And without it, such galvanic pairs exist for a very long time, a lot longer term operation of the vehicle itself.

How manufacturers protect the body

The easiest way to protect the metal is to cover its surface with a film through which the electrolyte will not penetrate, and if the metal itself is used good, with virtually no impurities that contribute to corrosion (sulfur, for example), then the result is worthy. But don't take my words literally!

The most common types protective film are primer and paint. In addition, it can be obtained from metal phosphates; for this, the metal surface is treated with a phosphating solution. Phosphorus-containing acids oxidize the top layer, creating a very strong protective film.

According to such an elementary “recipe”, bodies have been made for decades, as you can see, very successfully, since many cars produced in the fifties and sixties have been perfectly preserved to this day. Although not all, as over time the paint begins to crack. First, the outer layers are destroyed, then the cracks reach the metal and the protective phosphate film. And after accidents and repairs, coatings are often applied without maintaining the necessary cleanliness of the surface, leaving the smallest points of corrosion, which always contain moisture.
After an accident, as a rule, they try to sell the car quickly, so the body is straightened and putty, the repair price is minimal, only so that the damage is invisible.
Gradually, a center of destruction appears under a layer of paint, but this will become a problem for the new owner.

Destruction of the upper layer of the helmet, then the lower layer and moisture gradually penetrates to the metal

You can get rid of corrosion by improving the quality of the coating, using more elastic paints, protective layer which will be more reliable or by covering the case with a plastic film.
There is also best technology- coating the body metal with a thin layer of another metal, which forms an oxide film more resistant to the electrolyte, it has been used for a long time. This is tinplate - steel, which is covered with a thin layer of tin, it is familiar to everyone who has seen a simple tin can.

Today, anti-corrosion coatings are applied at the factory before the body panels are stamped, and zinc or aluminum is used as "protectors". Both of these metals, except for the presence of a strong protective film, have a valuable quality - the lowest electronegativity.
In the galvanic pair mentioned above, which appears after the destruction of the protective film of paint, they will play the role of the anode, therefore, as long as there is at least a little aluminum or zinc on the metal, they are the first to be destroyed. You can also take advantage of this property, just add a little powder of one of these metals to the ground, then the metal is covered with this primer, which gives the body panel a chance to extend its life.
Places where the paint is easily damaged (the bottom, for example) are covered with a thick layer of sealant or mastic, they additionally protect against moisture penetration. It is customary to call this coating "anticorrosive".

Coating anticorrosive arches and bottom - that's reliable protection

The appearance of corrosion can be slowed down for a long time, but it cannot be completely eliminated. By applying body waxing and various coatings, we give a respite for a year, or several years, no more.

Ways to extend the life of the body

Waxing the case prolongs its life

Important: Warranty through corrosion is given only if the dealer performs repairs and restorations in a timely manner, the main thing to remember about this condition.

Therefore, when executing Maintenance it is also necessary to clean the body from rust and restore the paintwork exclusively by technology. Do not neglect additional protection against rust - paraffin and oil films dry out or evaporate over time, so they need to be updated periodically.
Keep the car body clean. Adhering dirt absorbs water, which, together with dirt, remains on the body and continues to perform a destructive function, gradually penetrating through microcracks to the metal.

Try to repair paint damage on the body in a timely manner! Remember that timely cleaning of rust from the body will extend its life.
Use only the services of body shops where qualified craftsmen work, as the correct restoration of surface protection requires neat, clean work, with an understanding of all ongoing processes.
Offers to strip and just paint thicker inexpensively will get you back to the body shop, but the damage will be more serious.

Not everyone knows how to clean rust on the body:

• Cleaning should be done with sandpaper or a metal brush
• It is forbidden to use a grinder with an abrasive, you will burn the metal and it will rot very quickly, despite all protection measures, since the burnt metal loses all its properties

Tools

How to defeat rust or how to remove rust from the body, an urgent question for beginners:

• If rust is just appearing on the body of your car, then you need to assess the extent of the damage;
• When the rust area is large, it is worth driving the car to a professional body shop to replace the body element;
• Self-control of corrosion is not enough for further safe use car;

Before the beginning independent work anti-rust must take care of your safety! Purchase goggles, a respirator, and thick rubber (rubberized) gloves.

Tools and materials for corrosion control

In addition, you will need the following tools:

• A grinder with a metal brush or a drill with a brush (the use of an abrasive is excluded);
• Sandpaper coarse and fine-grained;
• Hammer;
• Body putty and spatula;
• Mastic;
• Primer;
• masking tape;
• rust converter;

Work in brief

If minor damage has occurred, then it will be enough to thoroughly clean the rust, treat it with a converter, wash off the converter, prime and tint, however, if the rust has already eaten a hole, then you need to clean the damaged area and close the hole with body putty. Then an additional wire mesh is needed. It will become the basis for putty. After the putty dries, clean the damaged area with fine sandpaper, then prime and paint.
Another option is to make a patch from tin, rivet or glue the patch, you can even solder it with tin to the body. After that, we perform puttying and painting.

Also corrosion aluminum body eliminated by replacing a rotten element, or by cutting a piece and cooking a new one in its place. You are unlikely to cope on your own, you need an argon apparatus and an experienced welder.

The best protection, the complex application of all measures and the timely removal of small rust spots, until it becomes through.

The operation of the car is accompanied by an aggressive effect on the body. High humidity, temperature difference, chemicals, mechanical influences, vibrations - everything affects the condition protective coating metal elements.

Over time, rusting processes start, destroying the metal. Do-It-Yourself Methods struggle involves removing rust from the car body with your own hands. Consistent execution of all stages allows you to save the characteristics of the body, extend the period of operation.

Causes of rust formation, vulnerabilities

The speed and process of rusting on different elements of the car is different. It is recommended to carry out regular inspection of parts, which will allow to identify foci in the early stages.

The main causes of rust formation:

• small gravel that damages the paint layer during movement;
• chemical compositions applied in winter.

Most vulnerabilities:

• the bottom of the body, constantly exposed to moisture;
• welds where cracks are formed;
• hidden, hard-to-reach cavities where moisture accumulates;
• areas where the protective layer of paint, varnish is damaged.

When thinking about how to get rid of rust on a car body, you need to prepare a place for work, tools and materials.

What may be required:

1. Power tool - drill or grinder with an appropriate nozzle. In the absence of a tool, a metal brush is used.
2. To eliminate pockets of rust, you need sandpaper - small and large. But it is not recommended to choose a grain larger than 120.
3. rust converter - chemical agent, allowing you to quickly get rid of the problem, prevent its development.
4. Degreaser - necessary for high-quality application of substances.
5. Putty - helps to level the plane, protects the metal.
6. Primer - required for adhesion of the coating and the base.
7. Paint - creates an external protective coating.

Use masking tape, newspaper or cardboard to protect areas that will not be treated. You will also need a clean cloth to clean the surface, degrease.

To remove rust from the metal of a car, it is necessary to carefully prepare the car. Work begins with washing, removing dirt, drying. So, it is easier to inspect damaged areas, identify new foci, prevent further development processes. Even a barely noticeable spot, a scratch affects a large area of ​​the metal, reducing strength and durability.

The main stages of the fight against rust:

1. They inspect the body, paying attention to the arches, bottom, sills. Do not ignore scratches, chips, damage to the coating.
2. Having identified problem areas, they begin to clean using a grinder, nozzle and sandpaper. It is important that in the process of work there are no deep scratches. Performing work by hand, from sandpaper with large grains, they pass to fine sandpaper.
3. Cleaned places are degreased. Thinking about how to remove rust from the metal of a car, you need to pick up tools - converters that eliminate the problem at the chemical level. After treatment, corrosion is easily removed, the likelihood of spreading, the appearance of new foci is prevented.
4. Places heavily damaged by rust are cleaned deeply. Therefore, after the completion of the process, degreasing, putty is applied. Deep irregularities are eliminated with fiberglass putty. For the final stage, the usual putty is selected.
5. A flat, fat-free surface is coated with an anti-corrosion compound. If it is supposed to process individual sections, the rest of the places are covered with cardboard, paper, film. Several layers are applied with an interval of 15 minutes to dry.
6. The resulting layer is matted using wet, fine sandpaper, and then degreased.

Surface painting is the final stage, contributing to the creation of a reliable protective layer. The paint is applied at a distance of up to 30 cm, several layers are performed. Next, varnish is applied. When processing individual areas, you can use a spray can of paint.

In the process of getting rid of corrosion, it is important to find all sources, the slightest spots, and completely remove traces of foci. To do this, select special chemical compositions. When using them, be sure to use personal protective equipment.

After processing, the compositions are removed, the surface is cleaned. When choosing a rust remover on car metal, it is worth considering the options for auto cosmetics manufacturers and folk methods.

Popular converter reagents:

1. Orthophosphoric acid is a common and effective substance that can be included in various preparations.
2. VSN-1 Neutralizer - a substance that can neutralize rust, turning it into a gray mass. It is easily removed.
3. Zinc spray allows you to effectively deal with foci, providing surface protection.

Thinking about how to get rid of rust on a car, you can pick up ready-made kits that include several substances - a degreaser, a converter, protective compound.

1. A composition is prepared based on water with the addition of ammonium, caustic soda and formalin.
2. Another option involves the use of a solution of hydrochloric and sulfuric acid with the addition of the first mixture. Here, after soaking the element for half an hour, it is easy to remove signs of the rusting process.
3. Fish oil is applied to damaged areas. Rust is easily removed after 2 hours. This option allows you to protect the car from rust. Fat penetrates deep into corrosion, which prevents further damage to the machine.
4. A rag soaked in kerosene allows you to remove pinpoint traces of rust.
5. Mixing charcoal and machine oil, make pasta.

Having eliminated the foci, one should not hesitate with further processing, otherwise new damage may form. You need to think about how to fix rust on the car body, especially when it is not possible to carry out subsequent painting. Here, after removing the hearth, a thick lubricant is applied in the form of wax, “Movil”, which prevents the penetration of moisture and further destruction.

How to remove rust from a car body with your own hands? literally every third car owner thinks. Corrosion in the city is a terrible epidemic that mows down cars all the time.

After contact with water and air, all products based on iron (Fe) and its alloys (steel, cast iron) corrode. Corrosion itself is an electrochemical process. During corrosion from the anode (such as a car body), electrons are released by emission through the electrolyte (water with dissolved salts) to the cathode (any metal parts that accept electrons).

Every year humanity loses up to 30% of all metal structures due to corrosion. It is quite possible that artificial iron oxide is the only product that humanity has produced in most for your history.

Corrosion and how to deal with it

Since oxidation is a natural process, mankind has not figured out how to deal with rust on a car as efficiently as possible. But in the modern world of a consumer society, this is not necessary. To ensure high rates of industrial production and profit, enterprises make cars with planned aging of components. As a result, such machines cannot last more than 5–10 years, no matter under what ideal conditions they are operated. But older cars were made to last and are operated for 20-40 years, and for them the fight against corrosion is very important.

There are several answers to the answer, how to deal with rust on a car:

• barrier protection using paints and varnishes;
• tread protection - galvanized body (when it is not the metal of the body that rusts, but its coating);
• electrochemical protection (by changing the electrode potential, if there is direct current only oxidized individual item- electrode, not all cars).

It is important to emphasize that the latter method is the most expensive and is used in exceptional cases. More often it can be found on gas pipelines.

Galvanized protection

In order to successfully remove rust from a car body with your own hands, you must use special diluted acids and an abrasive tool (zero skin). Users order in special car services additional processing of the body of their cars with special mastics or even galvanize the body. However, any of these types of body protection are very expensive and make sense for expensive cars, which they want to protect against increased corrosion in winter time(Our utilities use harsh chemicals to remove snow and ice from trails.) It is almost impossible to do the treatment at home.

Is it possible to remove a small rust by painting it over.

When a car owner is annoyed by rust on a car, do-it-yourself methods of fighting become instantly relevant. Not required to have perfect car, but no one wants rusty and with holes. Moreover, it is much easier to localize a process that has just begun than a heavily launched one.

Well, if the automaker is worried about reliable, combined protection of the body and other metal parts of the car, but what if not? Then everything falls on the shoulders of the owner.

slow down time

When thinking about how to stop body corrosion, most motorists agree that it is better to wash the car more often (at least once a week) and keep it in well-ventilated areas, garages. To prevent rust from starting its victorious march along the car body, it should not be allowed to mechanically damage it, that is, bumps, scratches, dents and other things.

It is desirable to stop the corrosion of the car body at the initial stage.

Since then it will be much more difficult to do this, because the rusted body element you will either have to change it completely, or deal with its complex and expensive restoration. To prevent corrosion of the car from spreading at a rapid pace, many car owners try to order anti-corrosion treatment of the bottom and other elements of the car body even at the stage of purchase. So you can delay the start of the process for several years.

The easiest way to remove rust from a car body is with a weakly concentrated alkaline acid, but some motorists prefer processing only with emery cloths or electrified tool wheels (with a small abrasive grit).

What processing methods does the car market offer

To remove rust from a car, specialized chemicals can also be used that convert iron oxide to iron tannate, a very stable substance. The disadvantage of this method is the inability to convert the entire oxide, most of it remains, which means that the corrosion process continues.

Also, the fight against corrosion is possible with the use of newfangled polymer-based primers that protect the metal from moisture, and hence from corrosion.

But the most popular among motorists is considered to be full or partial (the most dangerous places) galvanized. With it, rust can be removed from the car body reliably and for a long time. In addition, the practice of the same Germans or Japanese shows that a galvanized body will remain in 40 years perfect condition, no rust marks (examples: Audi 80, 100, nissan bluebird, Mazda 626). That is, car treatment with zinc or chromates is quite effective way proven to be effective in practice. If im processed even individual elements body, you can significantly slow down the aging of the car.

Where protection is most needed

Having bought an inexpensive rust modifier, they begin to process the most subject to corrosion places: thresholds, wings, bottom. First you need to carefully sand the place of rust, and then process it with a modifier. The treatment site will turn unnatural green color, which indicates the successful completion of the rust modification process. After 12 hours, you can start priming and painting the problem area. It is easier to process on the trunk lid or door surface than under the car, but it is there that most moisture is present, and the bottom rusts much earlier than the rest of the body parts.

To know how to remove rust from a car body, you need to understand at least a little chemistry. badly sanded trouble spot or painting over rust does not work. Yes, you will mask the rust, but the process will not stop and eventually the car will rot right under the paint. In order to have as little rust on the car body as possible, efforts are needed, and considerable ones.

It is necessary to carefully clean, dry and degrease the place where there was rust, apply a high-quality primer (preferably on a polymer basis) and only then paint.

Corrosion on new cars

Experienced car owners know that the thickness of the metal in modern machines has become much smaller than it used to be. Now budget car begins to corrode after 2 years of operation.

Now motorists have three main problems:

• rust removal;
• elimination of breakdowns of the chassis;
• adjustment and protection of the engine power supply system.

These problems are caused by the desire of automakers to use low-quality metal for the body, the harsh reality of the state domestic roads and poor quality domestic fuel. And although car corrosion seems to be a long-term problem, after the first winter it becomes clear that this is an erroneous judgment. After all, the main highways of city roads sprinkled with salt literally “eat up” the bodies of our cars. Even those that were with anti-corrosion coating.

Before getting rid of rust, many customers try to order complete diagnostics and identify any problem areas of the body. All anti-corrosion treatment depends on how well the service will be carried out. After all, if you do not remove all the rust from the car, you can get significant problems in the future.

Fight against an invisible enemy

Iron oxide, that is, rust, has a specific brown-red color, it is clearly visible, however, only on the outer part of the body, and corrosion processes also occur inside, under the lining of door panels, seats, and in the engine compartment. Rust removal tips are not always helpful or even applicable.

You have to rely only on the automaker and the quality of the brand, since rust can only be removed in accessible places.

Rust becomes one of the factors causing the so-called metal fatigue, when, under various dynamic loads and internal stresses, the metal simply bursts. And it's good that it didn't burst steering rack or thrust, and a trim detail. But there are often more serious damage which always start with rust.

When you buy a vintage car, the question of how to remove bugs and other signs of rust is a top priority. So far, the technique allows only the use of various polymer-based paints or putties to level the metal. However, in the case of large-scale corrosion of the body, it will be necessary to use proven means: welding, straightening, puttying and painting work.

Independent work

It is important to understand that not all body work you can do it yourself without special equipment. So, you can tint a car a little in the garage, but even painting the body with high quality, most likely, will not work. And there is no need to talk about how to remove rust from a car body completely. This is an almost impossible task. However, it is quite within the power of a novice motorist to solve local problems that spoil aesthetics.

A few videos from YouTube - and you are aware of all the features of this kind of procedure. To remove rust from the car with a minimum investment of time. It is enough to buy sandpaper in a hardware store, car putty, primer paint, and you can completely get rid of rust on the car (in the most prominent places).

Corrosion protection is not only the preservation of the aesthetic appearance, but also the integrity and performance of the car.

Therefore, a large amount of rust on a car cannot be ignored for a long time, as the time will come when this will affect general state auto (literally worsen it specifications). Therefore, it is better to repair all rusty holes in advance.

Buying a used car

When buying a used car, it is advisable to conduct a thorough inspection, as owners often paint over rusty places without proper anti-corrosion treatment of the body. All this leads to the fact that the car begins to rust intensely, despite the fact that the external looks like new.

And if imported cars have factory rust protection, domestic ones come with this option only in the luxury package.

For this reason, in order to get rid of rust on a used car, it is advisable to carry out diagnostic measures in advance (a thorough inspection will reveal all defects). And then the buyer decides for himself whether he needs a car with rotten body and how much you can reduce the amount of the transaction.

Experienced motorists know that if you buy an older car in good condition without repair, then the benefit from the purchase will be higher than in the case of a car, renovated(often it is made of low quality). In addition, until the 2000s, the quality of automotive metal and paintwork was much better than modern ones. And how to deal with corrosion if it covers a new car from the assembly line, and steel has a lot of harmful impurities? No paint will protect against corrosion.

Corrosion of the car at all times provided their owners with a lot of trouble. Car doors are especially vulnerable to rust. This part of the car body has several places where rust and destructive corrosion appear first. Protecting a car door from corrosion varies in methods that depend on the degree and nature of the damage.

Causes of corrosion damage to doors

In order to more consciously approach the issue of protecting car doors, you should familiarize yourself with the causes of corrosion on this body part. You should also understand the types of foci of rust. Depending on these factors, you need to plan the fight against car rot. This applies only to those vehicles for which refurbishment is still appropriate. In some cases, replacing the door will be the only way out of this situation, when it is no longer possible to stop corrosion.

The very process of rust removal and the subsequent protection of car doors also has many nuances and little things. The fight against door corrosion can be considered using the example of Matiz. This car has become popular in recent times, as has the refurbishment of its doors.

The first cause of rust is the poor protection of the metal part of the car. Quite a lot of motorists do not pay due attention to this issue and do not carry out timely processing of body parts. anti-corrosion materials. As a result, the operation of the Matiz ends with disastrous consequences and the costly replacement of entire parts. So the first thing to do to stop corrosion is to prevent it.

In addition to the negligence of the motorist, constant moisture attacks are carried out on the metal. Even metal protection eventually succumbs to water, with which the car comes into contact very often. This is especially true for operation in regions with natural high humidity climate. Moisture constantly accumulates inside the cracks and negatively affects the metal.

The third enemy is the salts and chemicals used road services to remove snow and ice from roads common use during the cold season. These substances accumulate inside between the adjacent parts of the car, clog in the doors and simply settle on their surface in the form of a plaque. If Matiz does not wash often in winter, then the chemistry successfully eats up the paint, and then the metal by spring.

Another factor that negatively affects the metal of a car is minor accidents and other damage to the surface of the doors. In places of damage, the protection of the paint layer is weakened, and this contributes to the acceleration of the destruction of the metal. This happens especially quickly from below and inside the doors of a car, where moisture and chemistry are the most.

Varieties of door corrosion

Corrosion of car doors can be divided into several types:

• Slight swelling of the paintwork. A relatively small bubble grows very quickly and as a result, the owner discovers that his Matiz has through hole at the door. Such phenomena are observed quite often, but it is very simple to remove such a defect.
• Slight rust forms and becomes visible when the paint layer is damaged. Just like in the previous case, this is a signal for immediate action, otherwise the consequence will be a through hole.
• Large pockets of corrosion with obvious traces of rusted metal. In such cases, pieces of a rusty part can be picked off even with a finger. At this stage, the rotting of the driver's car expects a serious or complete replacement doors. It is very difficult to remove such corrosion, since it is not always possible to see its real scale.

Depending on how much corrosion has spread through the door, the method of dealing with it should also be determined. Will it local repair or restorative, also depends on the place where rust has formed. Repairing a door is not easy. inside, as well as outside. And all because the door is the exact mechanism of the car, and if you make a mistake in the repair, then it simply will not close.

Methods for eliminating corrosion damage to doors

According to the methods of combating corrosion, several varieties can be distinguished. All of them have mixed opinions of experts and amateurs, but they have been successfully used for many years, and their effectiveness can only be judged by trying everything on your car.

The very first thing to do when corrosion occurs is to completely remove it. Even if it is not yet planned to paint the door, it is enough to treat the cleaned place with a primer and apply a protective substance to this area.

This is especially true on the inside of the door. Such localization of corrosion will not be noticeable, and your Matiz will be able to wait for a more convenient opportunity for painting. A more difficult task is facing those who started restoration repairs with painting and other delights. This option requires much more time and money, but after its implementation, you can forget about door corrosion for quite a long time. This type of repair is the most common, so it is described below in more detail.

The most difficult type of door repair is the restoration of its geometry with partial metal inserts. The body geometry of the Matiz is quite simple, but it also has bends and other details. Before proceeding with such repairs, it is worth counting to weigh everything. Perhaps the degree of damage is so high that it will be easier to replace the damaged door. Fortunately, on the same Matiz body parts enough on the market.

Now in more detail about how to stop corrosion, how protection is applied to Matiz and how to prevent this process to the maximum in the future.

Preparing your door for corrosion

Before doing anything, it is necessary to assess the degree of damage and how to prepare the door for repair work. If there is rust only on the outside of the Matiz door, then all the work comes down to removing it to bare metal. This process can be carried out with special brushes for a drill or grinder. You will also need sandpaper of various grits.

If corrosion spreads from below or from the inside, then the door will also have to be disassembled. To do this, the entire trim and door controls are removed.

Removing corrosion from the inside looks similar to the above option. The only thing to consider is the protection of the interior from dust and sparks that will fly there during the rust removal process. When all the centers of corrosion are removed, you can proceed to the next stage - the restoration of geometry. The two methods for restoring the door geometry are briefly described below.

Metal inserts on damaged areas of the door

The hardest part about inserting pieces of metal is to keep the shape of those areas that have not been corroded. Very often, inexperienced welders can pull the metal with their efforts, as a result of which the overall shape of the door is violated. And this negatively affects both the appearance of the part and its functionality.

Equally important in the process of inserting metal patches is correct selection recovery material. It is best to cut pieces of metal from a similar part of another car.

Ideally, from the same Matiz model, which can no longer be restored. This will make it possible to choose the metal not only in terms of thickness and composition, but will also help to restore the shape of the door more accurately.

Applying putty to repaired areas

If repair cost without metal inserts, then you will have to restore the geometry with automotive putty. Here, too, some skills are needed, since it is rather difficult to accurately repeat the surface that was originally. After the metal inserts, you can’t do without putty either, because in any case there will be minor defects which will need to be corrected at this stage.

After applying the putty, wait until it dries properly, and after setting, you need to start grinding. At this stage, you need to gradually adjust the surface to the ideal one. This can sometimes be very difficult to achieve, and especially outside the door, where appearance plays very important role. After aligning the geometry, you can proceed to priming.

Priming of damaged areas

If the repair was local and small pockets of corrosion were removed, then priming should not be extended to a large area. Sometimes it is enough to apply a layer of primer with a brush and sand it a little with fine sandpaper. From the bottom of the door and from the inside, this is also more acceptable, especially if there is no spray gun.

When priming is carried out with an airbrush, you should first protect the remaining parts of the car that will not be painted. More simple option will give Matiz to specialists, because at specialized stations there is everything necessary for such a procedure, starting with equipment and ending with experienced personnel.

Painting

The same applies to painting work - if there is not enough experience in this matter, then it is better to entrust the work to professionals. It will be a lot cheaper than the inept painting that will have to be redone.

When painting, you should be guided by the same basic rules as when priming. An important point is the selection of paint and its proper preparation. No less significant is the quality equipment and the experience of the master.

Prevention of corrosion of car doors

Very important process, besides refurbishment, is the prevention of corrosion Matiz. No matter how well it was made body repair, subsequent protection - important factor, which affects the long service life of both doors and other parts of the car. Preventive maintenance includes surface treatment by special means, which in our time are quite common and have an extensive range of varieties. This is both traditional autochemistry - Movil or pushsalo, and relatively new.

New types include various aerosols and means zincating by the method of electrolytic reaction. What exactly to use, it is impossible to give a definite answer. Each manufacturer praises its tool, and each user speaks differently about a particular tool.

Speaking of prevention. Protective agents need to be applied not only when corrosion has already done its job, and it was necessary to carry out repairs. When buying a new car or equipment in good condition from your hands, you should immediately pay attention to surface treatment. This will help for many years to delay such body work, which is associated with the restoration of the results of the negative activity of corrosion.

Every car owner has encountered such a phenomenon as the formation of rust on the body of a vehicle. You can remove red spots from the surface yourself using folk remedies. Very often you can hear the question: how to remove rust from a car body without damaging the paint? Unfortunately, this is not possible. After all, rust does not form on the surface of the paintwork, but on the metal.

Main stages

How do you remove rust from a car body with your own hands? This process can be divided into several main stages:

1. Vehicle wash. This allows you to remove all dust, stains and dirt.
2. Drying the car.
3. Removal of corrosion.
4. Processing of individual sections to protect the metal.
5. Puttying and sanding.
6. Coloring of treated areas.

Vehicle preparation

In order for the removal of rust from the car body with your own hands to be successful, you must carefully prepare all the damaged areas. The vehicle should be thoroughly washed. This can be done manually or by means of mechanization. In this case, it is recommended to use special sprayers. The body should be cleaned of dirt inside and out. It is also worth washing the luggage and engine compartment. This will allow you to carefully inspect the metal parts of the vehicle.

For best result You can use car shampoo. This remedy allows you to remove not only dust and dirt, but also grease and salt. At the same time, car shampoo is able to protect paintwork. The composition of such a drug does not contain toxic components, formaldehydes and phenols.

Body drying

Do-it-yourself rust removal from a car body is a process that requires careful preparation. After washing, the vehicle must be thoroughly dried. To do this, the body should be wiped several times with a sponge or cloth. This will remove any remaining moisture. Otherwise, stains may form as a result of natural drying.

After the car is ready, it is worth carefully inspecting it and identifying all damaged areas. Then it is recommended to install protective covers, which are designed to protect entire body parts from paint and chemicals.

Basic Rust Removal Methods

So how Folk methods V this case may not help. Therefore, it is recommended to choose one of the traditional methods:

1. Chemical.
2. Mechanical.

You can remove rust from the car body with your own hands in the garage. The main thing is to decide in advance on the method and prepare everything you need.

Mechanical and do-it-yourself painting

To begin with, the area on which rust is present should be carefully rubbed with a metal brush or sandpaper. In this case, care should be taken, since the material that has undergone corrosion is easily destroyed. When processing the surface with sandpaper, you can resort to a wet or dry method. You can moisten the material with white spirit or kerosene. Grouting should be started with a coarse-grained sandpaper, and completed with a sandpaper with a finer structure. This allows you to achieve smooth surfaces.

You can also use a grinder to remove rust. Clean the damaged area until smooth. After processing, there should be no traces of rust on the metal.

If you choose a mechanical cleaning method, then you should use protective equipment: gloves and goggles.

Sandblasting method

This is another mechanical way to remove rust from the body. Sandblasting is considered the most effective and safe for metal. Cleaning of the material from rust is carried out thanks to a jet of air containing particles of sand. At home this method not available to everyone. After all, a sandblasting machine is required for work.

This method allows you to completely clean the damaged areas. When using a sandblaster, it is also recommended to protect your eyes and hands.

Chemical method

Chemical rust removal is carried out using various reagents. Such means help prevent the development of corrosion in already damaged areas. On this moment There is a fairly large range of rust converters. The list of the most popular includes:

1. Rust neutralizer with VSN-1 marking. After surface treatment, rust gradually transforms into a substance gray color which can be quickly and easily removed with a rag.
2. Orthophosphoric acid. This substance is not only sold in its pure form, but is also part of a variety of rust converters.
3. Zinc spray, for example "Zinkor-auto". This product allows not only to remove rust from the surface of the body, but also to create a protective film.

Removing rust from car body special formulations is an easy process. In this case, the surface is protected from further damage. As for rust, it is converted into a substance harmless to the metal.

Further processing

After stripping, the treated areas of the body must be degreased and covered with a layer. This is required only in cases where the metal is completely free of rust. If the material remains covered with the factory primer, then it is not necessary to apply another layer of primer. This tool allows you to protect the metal from corrosion, as well as provide better adhesion to the means that will be applied to the surface of the body. Primers are as follows:

Puttying and further painting

After the surface is prepared, it is worth applying a layer of putty. It also needs to be leveled and made smooth with a moisture-resistant skin. Putty can be applied in several layers. Each time its surface must be leveled with sandpaper. Each area must be level and smooth. After that, it is recommended to apply another coat of primer so that the paint adheres better to the treated areas.

After that, you can proceed to the choice of coverage. The shade of the paint must match. It is best to select the color in a car workshop. You can find out the coverage number in the vehicle passport. Staining of treated areas should be done with a spray gun. At the same time, at least three layers must be applied. Do not forget about protective equipment.

Properly carried out cleaning of the body from rust, as well as its painting, significantly increase the life of the vehicle.