Methods for protecting vehicles against corrosion

Iron - is the most popular metal, mined from the bowels of our Earth. His mined as iron ore. And this ore is a stable chemical compound of oxygen, silicon and sulfur. But, unfortunately, this ore is always trying to return to its original position. That is the headache of many motorists. About what, there are methods to protect vehicles from corrosion and talk in this publication. Trying to return the iron from his unnatural position in the original, natural, and is called corrosion. Corrosion process can not be stopped, even if to approach this question theoretically. When our weather conditions iron is used when creating the car body, for the year rust on 0,2 mm. Must take into account the fact that used in this case steel sheets have a thickness of 0,8-1,0 mm. It turns out that naked body will be gaping holes (due to corrosion) after 4-5 years. Consequently, the issue of protecting the vehicle from corrosion and methods for its solution will be valid for a long time. But if the issue of protection of the car body competent to go, knowing what the consequences can lead active rusting of metal, this rapid process of corrosion can be minimized. And if the body of the car will serve faithfully for many years, even when other parts, designs obsolete. How competently protect the car body from corrosion. The presence of oxygen often leads to chemical corrosion. For the excitation of other types of rusting metal, such as electrochemical, which often damages the car, you need an electrolyte. The ideal electrolyte for corrosion of the car body is salt water. Corrosion process is not subjected to the entire body of the car. Different parts of the machine during its operation are in unequal situations. Consequently, the greatest impact have external covers the body. In addition, gain exposure and experience details of forming the bottom of the car, as they are more damaged and mechanically. These are the thresholds, counters, doors, spars. They flushed with water, and for a long time does not evaporate because the ventilation is poor. Corrosion has a favorite band - is welded seams, sharp corners, bends and other areas. Consequently, developers of cars in their design must consider the fact that the car was as little as possible the welds. In the future, for the quality of the car responsible technologists. In the case where the shell body is protected from water and oxygen, the effect of corrosion is much weaker. With this in mind, are different kinds of protection from rusting process, referred to as barrier protection. It is the formation of barrier protection oriented all final steps in creating bodies. The effectiveness of any type of car protection against corrosion is directly dependent on the level of impermeability, chemical persistence, adhesion to the Guarded cover and how much surface area is hardy to the formation of microcracks. The first way to protect vehicles from corrosion - protection formed by phosphate. During the processing of body phosphate is formed shell, which consists of phosphate salts of iron and manganese. Ability of phosphorus to form a protective layer, often a matter of controversy. Part of professionals motivated by their distrust of phosphorus so that it forms a spongy shell and a shell forming a low protection. Others experts believe that this minus the ability to offset the protective layer of substances enter into chemical reaction with oxygen, penetrating to the metal through the pores. As a result, formation of secondary phosphate, "concreting" hole. The views of the contending parties agree that the phosphate - the ideal foundation for further application of paints and varnishes. Phosphate provides a strong connection to dope with the shell body. The method of the second - multi-stage painting. To date for applying coating materials to mass production cars used elektorforezny way. This method of protecting vehicles against corrosion can create the same layers on the structures of complex shape. In applying the method of electrophoretic coating falls on a car body of the electric current. Therefore, the body, umeschenny in a container with the primer, is transformed into an electrode. In the case where the body plays the role of the anode, the painting is called anaforeznoy. There was a time when this technique was a huge success. But then found that such coating does not provide corrosion protection. Therefore, in the second half of the 70's, many auto factories have moved to cataphoretic method of primer. In this case, the body plays a role of cathode. When cataphoretic method of primer sets a bad grip on the base. But with all this, barrier quality katafareznoy painting is much higher than anaforeznogo soil. We give an example: during the desk it was proven that a salt-spray endurance anaforeznogo soil no more than 300 hours, whereas cataphoretic paint lasts for more than 600 hours. Cataphoretic way of priming the body thickness of 15 microns as effective as anafareznoe coating thickness of 20-22 microns. Cataphoretic top coat is covered with an additional layer of primer. This operation is necessary to protect cataphoretic paint from the environment. But the paramount importance of this layer - the alignment of the shell for painting. The final phase - a painting. Varnish or paint can be applied in a single layer and multiple layers. Of course, paint, primarily serves a decorative role, but it takes a considerable part in protecting the car from rust. The total thickness of the same for all coatings ranges from 90 to 130 microns. Despite all of the methods undertaken to protect the vehicle against corrosion, there always exist areas that are poorly worked out electrophoretic method of primer. The most unpleasant thing is that just here in the period of operation of the vehicle accumulates moisture. The third method of protecting the car - in the fight against corrosion, apply zinc. By and large, all of the above operations are performed anticorrosion function only with the occasion arises, in fulfilling its primary mission - giving the car a necessary appearance and gloss. But the main enemy of corrosion and defender of the car body is a zinc coating. By and large, zinc is sacrificial protection. But it is impossible to plead his dignity and the protection of the barrier. For sacrificial protection applies especially of two metals that are immersed in an electrolyte, ie those that can form galvanic couples. In this case, refers to electrochemical corrosion, corrupting power is directed to the anode while the cathode remains intact. Not only that, more and resumed due to settling ions. For example, the interaction of iron and copper, the anode serves iron and copper becomes the cathode. In such pairs as iron and aluminum, iron, cadmium, iron, magnesium, iron and zinc, a cathode is always playing the iron, turning to the protected metal. Zinc coating most effectively. Zinc coating forms a layer equal to 7.10 microns. But zinc - is, first, expensive, and secondly, zinc increases the weight of the machine. Consequently, the zinc surface is more often one-sided. Besides, you can not galvanized roof rack body and the body. Swiftness of oxidation of zinc, preventing the iron may be about 1-2 microns per year. It depends on the load of zinc in the galvanic couple. When competent operation of the zinc surface will last 10-12 years. In fairness, it should be noted that the application of zinc, you can opt out phosphate. And finally, the final way to protect vehicles against corrosion - anticorrelation. More weaknesses of the car body is often at the plant are incremental processing. In this case, endodermic surfaces are treated with special, easy-flowing liquids. When the liquid hardens, turns into a waxy film. At the bottom of the car and the wheel arches cause a special paste that protects these parts from mechanical wear. Alas, this operation, so necessary for our climatic conditions, is not carried out, as it causes an increase in the price of the car. From the above, should be a very important conclusion. In the struggle with nature can only defend, but it somehow does not win. Therefore, you must correctly construct a protection against corrosion.