In addition to the anticorrosive effect, the main property of the material is a high level of adhesion (adhesion of surfaces). Soil got its name due to the fact that its solidification occurs due to the action of acid.
- Feature of applying the composition
- Types of acid soils for cars
- Preparing the body for the primer
- Acidic soil application methods
- Examples of Acid Primers
- Phosphating reactive primer DUR 1: 1
- Body 960 Wash Primer
- Radex CR 1 + 1 with activator
- Reoflex Washprimer 2K 1 + 1
- Mobihel Primer
- Conclusion
Feature of applying the composition
The primer is a tool that protects the metal well enough from the negative effects of the environment. When choosing this material, you need to pay attention to manufacturers and not chase the cheapness.
Important! When applying the composition to most of the car body, it is recommended to apply the aerosol method, and treat the weld seams with a brush.
Spraying is carried out directly on a metal surface, devoid of any protection. Before this, a degreasing procedure is carried out, the meaning of which is to eliminate the foci of corrosion.
15 minutes are enough to harden the primer, provided that the air temperature is approximately +20 ° C. You need to wait until the composition is completely dry, then perform surface treatment with leveling acrylic primer.
Important! This composition is recommended to be applied exclusively to pure metal. It is advisable to remove the old putty. If for some reason this cannot be done, an epoxy primer should be used.
It is possible to apply an additional layer of putty and a secondary primer on acidic soil only after surface treatment with a two-component filler, and only then it is necessary to start painting.
Characteristic features of acid pickling soil:
- resistance to moisture and aggressive materials present in the soil;
- protection against mechanical influences from the outside;
- durability.
Types of acid soils for cars
There are various types of primers used to treat a car body. Here are the main ones:
- Reactive soil (Wash primer). A primer of this type is applied to pure metal with a thin layer of 8 to 13 microns thick. After that, the body is treated with acrylic material. Wash primer is used as a base for applying subsequent layers.
- Self-Etch primer. This material is an acid-filling soil containing zinc. Designed to smooth out irregularities of the treated surface and improve adhesion to other means. First, the acid reacts with the metal, then a protective film is formed due to the dried polymers and anti-corrosion substances.
- One component acid primer. The material does not require the addition of an activator. It is applied to the surface from an aerosol can or spray gun in one thin layer. After drying, it should be covered with an acrylic filling primer with a hardener.
- Two component acid primer. Before use, the material is connected to the activator, after which it is applied in one, two or three layers (depends on the manufacturer's recommendations). Breaks are approximately 5 minutes at room temperature.
Preparing the body for the primer
The technology must be carefully observed at all stages. The main ones are:
- Preparation of the room in which the work will be performed.
- Cleaning the vehicle surface from dirt and dust.
- Inspection of a car, selection of paint.
- Protection against the effects of paint on body elements that do not need to be processed.
- Surface degreasing, grinding using abrasive materials.
- Putty application.
- The creation of a coating that prevents corrosion.
In the process of cleaning and degreasing, it is preferable to use a brush or spray in the spray can. In the latter case, the coating is more even. Then you can apply the acid layer.
Protective materials:
- respirator;
- work clothes and shoes;
- gloves.
The exposed metal coating of the car body is exposed to corrosion hazard and, as a rule, is not able to withstand even minor damage. The primer applied to the vehicle frame acts as an intermediate link between the metal body and the paint.
to contents ↑Important! Incorrectly selected or poor-quality soil composition often leads to defects in the paintwork.
Acidic soil application methods
There are several ways to process a car body:
- Using a brush.
- By spraying aerosol.
- By immersing the metal in a primer solution.
- By atomization using electricity.
- By electrodeposition. The process is based on the principle of electrophoresis. A product that needs to be painted is placed in a container and acts as a charged element of the circuit (positive or negative).
Important! Primer dipping is applicable exclusively to factory conditions.
When working with acidic soils, certain precautions should be taken, since they contain unsafe chemical components.
The primer is applied before painting and may be sanded or not subjected to this procedure. The use of high-quality materials, strict adherence to the procedures and qualifications of the contractor directly affect the level of corrosion protection of the treated body.
Polyvinyl-butylene, which is part of the materials used, helps prevent rust. Soil cover surfaces from:
- aluminum;
- of stainless steel;
- ordinary metal;
- galvanized steel.
Examples of Acid Primers
In the process of working on a car body, various materials are used. It should be borne in mind that the expected result can be obtained only by means of means that have justified themselves in practice. These include:
- Phosphating reactive primer DUR 1: 1;
- Body 960 Wash Primer;
- Radex CR 1 + 1 with activator;
- Reoflex Washprimer 2K 1 + 1;
- Mobihel Primer.
Phosphating reactive primer DUR 1: 1
This is a Russian-made product:
- dries quickly;
- securely attached to the body;
- protects metal from corrosion.
The material does not contain chromates (salts of chromic acid). Hardening occurs using the reactive catalyst that is included.
Body 960 Wash Primer
This two-component primer is applied to parts made of stainless or galvanized material, aluminum and galvanized. Before use, the product is mixed with a hardener, after which they cover the surface with a layer of approximately 10 microns.
Advantages of the product:
- quick drying;
- no need for polishing;
- the ability to apply any two-component materials on it (except for those that include polyester).
Radex CR 1 + 1 with activator
This acid pickling soil of two components effectively protects the car body from rust. In addition to the tool itself, the kit includes a hardener Radex CR Activator. Volume - 1 liter, as well as the primer itself. Before use, they are mixed in a ratio of 1: 1.
The tool has proven itself in the processing of metal parts of cars, including galvanized and new surfaces. The soil is firmly fixed to the frame and prevents the penetration of rust.
Reoflex Washprimer 2K 1 + 1
It is used when restoring the body paintwork or when it is not available. The layer thickness is about 10 microns. Drying time - 15 minutes at a temperature of 20 ° C. Included with this phosphating primer is an acid hardener.
Mobihel Primer
This primary one-component primer protects the body well against corrosion. Apply to ordinary or galvanized metal, aluminum products by spraying. Before this, mix with a diluent in a ratio of 5: 1 (5 parts of soil and 1 diluent). It dries in an hour at 20 ° C, after which the following materials are applied.
Important! Primer Mobihel Primer is not compatible with polyester putty.
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Conclusion
The purpose of acid soil is to prepare the metal surface of the car for painting and protect it from corrosion. After that, secondary processing is required. At the same time, the chemical properties of the material can effectively protect the car frame from the effects of salt and moisture.
