Even the most thorough care of the car cannot save it from the appearance of an eternal problem - rust spots. The causes are water, reagents that are used to treat roads, and pebbles that, when rebounding, damage the paintwork. Corrosion can grow rapidly, so it is very important to stop this process at an early stage. An effective preventive measure is the systematic monitoring of the condition of the car body and the timely elimination of corrosion centers. These measures will help get rid of rust on the metal of the machine.
Rust on the body is the result of untimely care
The classic way to get rid of corrosion
For motorists, painting corroded body parts is the best way to combat corrosion. This method will work if the surface is properly prepared. You can get rid of rust on the following ways:
- Remove the loose layer of rusted metal with a coarse-grained sandpaper or grinder
- Remove swollen stains of paint and primer
- Thoroughly clean the surface of grease, dirt, dust, dry it, degrease
- Level the surface with putty, apply a primer after it dries, degrease and paint
This process is time consuming and not always efficient. To stop rust on the car body, you should use modern chemicals.
Chemistry against corrosion
Cleaning metal with the help of special ones to free the body from rust. process and turns the corrosive layer into a hard ground. The process is based on a chemical reaction between iron oxide and converter compounds.
You can get rid of rust with modifiers as follows:
- The car is washed and thoroughly inspected
- Loose layers of rusted metal are carefully removed with sandpaper.
- A rust converter is applied to the area damaged by corrosion.
- The composition remains intact for 12 hours - during this time, corroded iron turns into dense soil
- Places that have been affected by iron corrosion and that have been treated with a chemical modifier are thoroughly washed and cleaned with a fine-grained sandpaper
- Then putty is applied to them, after drying it is cleaned again, degreased, covered with primer and a layer of paint
Anti-corrosion preparations are produced on the basis of zinc and phosphates, when phosphoric acid comes into contact with rust. Converters that are available in liquid form, aerosols, gel will help remove rust. In any case, it is necessary to observe safety measures - work with gloves, apply drugs with a brush. Chemical modifiers are extremely aggressive preparations, so rust converter should be used carefully.
The most useful use of modifiers is considered to be for hard-to-reach places or extensive affected areas, when a person is not able to cope with large-scale corrosion. However, there is some danger here - the acidic converter must be washed off the surface of the part to be cleaned. Otherwise, under-film corrosion may occur, the spread of the process at an even higher speed, when it becomes almost impossible to stop the corrosion of the car body. This is the main disadvantage of the funds under consideration.
What is a neutral transformation
There are corrosion converters that have a neutral base. Such products are much safer than chemicals and are able to transform a damaged layer of 150 microns in size in several applications. However, these corrosion converters not only convert rust into primer for coating, but also slow down its further spread. This is where a corrosion inhibitor differs from an acidic converter.
Anti-corrosion treatment will protect the car for several months For several weeks and even several months, depending on the climatic features of the area, the surface on which the metal corrosion inhibitor is applied is reliably protected from the spread of rust. It turns out that neutral converters perform two functions:
- Modify rust into primer for painting
- Slow down the spread of corrosion
This distinguishes them from the usual means to combat the oxidation of iron. At the same time, there are various inhibitors that work in certain environments. In addition to the advantages, there are also disadvantages of corrosion inhibitors. For example, some do not work well at low concentrations.
How to get rid of corrosion: the use of a degreaser
Before painting, the rust-free and puttied metal must be degreased. This stage is very important and depends on it, the corrosion of any part will stop. The choice of degreasing agent is influenced by subsequent processing. They are of three types:
- Organic - used if other means cannot be used. Means are toxic, therefore, require special safety measures. Some compounds are flammable
- Emulsion - suitable for cleaning under any type of paint
- Alkaline - considered the most effective, have a minimum degree of toxicity and flammability
The use of a degreaser is mandatory - the use of corrosion inhibitors does not affect this step.
The degreaser is used as follows:
- It is applied without fail before painting the part.
- For use only cotton fabric
- After application, the metal cools down - you need to wait a while until the car takes the previous temperature
- Next to the degreased surface, you should behave carefully so that specks or dust particles do not get on it.
- After rinsing with water, it is enough to wipe the surface with a cloth soaked in a degreaser - this will help remove residual dirt.
- Thorough wiping of the primed surface with a degreaser is excluded - the soil cracks because of this, so re-puttying may be required
The degreasing quality check is determined by applying paper - the result is evaluated visually. The correct use of degreasers will help get rid of rust on the metal.
Additional ways to protect against rust
In addition to mechanical, chemical and inhibitory methods of protection, a thermal method is used. Rust is burned out with a burner, but it is better to entrust the implementation of this project to specialists. But it is quite possible to make a rust converter. This will require table vinegar. The part is soaked in it for a day, and the rust on the body is sprayed from the spray gun.
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The fight against corrosion is ongoing. It is impossible to get rid of it, but everyone can temporarily stop rust on a car body or slow down its spread. For this, mechanical means of salvation from corrosion, converters, inhibitors, burning with a burner and folk methods are used.
