The water on the bottom of the car is not as bad as the various aggressive mixtures that are poured over the roads to protect them from icing. Such compositions quite strongly activate the processes of rust formation. Corrosion can lead to serious damage to the body - up to through holes. Treatment of the bottom of vehicles is a necessary measure in order to protect the metal from the formation of rust. The car will serve for a long time and properly if such processing is carried out in a timely manner.
Modern cars of foreign production will be able to do without special processing for quite a long time. It is advisable to process domestic models immediately after purchase. Used cars need regular and complete anti-corrosion treatment of the underbody.
Types of corrosion protection
Metal corrosion protection products can be divided into two types:
- passive;
- active.
The passive form of rust protection means that a protective layer will form on the surface of the car body. This protective film will separate the body from moisture.
The composition of such products does not include ingredients that prevent the occurrence of corrosion. They just protect the body with a film that forms on the body of the car. The thickness of this film is not very large. As a rule, 2-3 mm, no more. Applying the product in a thicker layer is unwise. Such products are almost always made on the basis of resins, mastics, bitumen or elastomer.
Active means for protecting the body not only form a protective film, but also fight all manifestations of corrosion. Special agents convert the appearance of rust into a stable phosphate compound. These products include phosphoric acid, which is considered an ideal corrosion inhibitor.
As for the consistency of the products, they can be either rather viscous (for example, different mastics), or be in a liquid form, and also tend to be sprayed under pressure. Both viscous and liquid formulations perform their task in approximately the same way. But there are differences in the method of application.
Liquid sprayable compounds can penetrate anywhere easily enough. Indeed, when spraying, a light mist is formed from small drops of the agent. Also included with the sprayer is a long, thin nozzle, which can be used to reach the most inaccessible places.
It is quite difficult to coat closed cavities with viscous anti-corrosion agents. Such formulations are usually applied by hand using a wide brush.
Underbody anticorrosive materials
For the treatment of the outer sides of the arches and the bottom, slate mastic is used. After its application, a bituminous film is formed. This ensures almost complete waterproofing of the body.
The bottom and wheel arches from the inside and outside can be treated with rubber-bitumen mastic. In addition to protecting against corrosion, rubber-bitumen mastic will protect against gravel impacts. Also, the product can withstand severe frosts.
A mastic based on bitumen and rubber protects the external and internal parts of the body, including unpainted surfaces - sills, arches, trunk, etc.
The most popular anti-corrosion agent is Movil. It will reliably protect all parts of the car body, including joints and joints. Movil spreads well over the surface, quickly forms a waxy layer, taking out moisture.
In addition to anticorrosives, threshold auto-preservatives can be used. They will not only protect the thresholds of the car, but also save doors, pillars and other details from aggressive deicing compounds.
Before using anticorrosive agents, it is necessary to properly prepare the surface of the body for the application of anticorrosive. When applying the product, a prerequisite is compliance with the recommended temperature and time regime. If these parameters are observed, the anti-corrosion treatment of the car underbody will be most effective.
