The destruction of the metal due to the electrochemical and chemical effects on it of an aggressive external environment is called corrosion. Corrosion can be local, in which a small area of the surface is destroyed, as well as uniform. With it, the entire surface is destroyed. There is also corrosion along the boundaries of grains – this is inter -quristalline corrosion. The essence of corrosion is that the metal under the active and constant effect of oxygen and the aquatic environment changes the structure and becomes loose powdered substance of light brown.
Nowadays, there are a huge number of methods for combating corrosion aimed at reducing the activity of the corrosive process or its complete elimination.
You can protect iron from corrosion by covering it with other metals. This is the most effective way used in construction. There are two types of metal coatings called inhibitors. Tread methods include zinc, aluminum and cadmium. Corrosion -resistant methods are a coating with metals such as silver, copper, nickel, as well as chrome and cadmium. Inhibitors are applied using a chemical method: one metals group has greater electroidability when interacting with iron, and the second, on the contrary, has a greater electrical positive in relation to the gland. Of great popularity these days are tin as a coating, as well as zinc, the coating is obtained by pulling the iron leaf through liquid zinc or tin. It should be noted that the zinking of metal structures is an effective method of combating metals corrosion. Galing passes cast iron and steel reinforcement in construction, as well as water pipes. This operation greatly increases their anti -corrosion stability. Galled iron as roofing material is also widely used in the construction industry.
Another effective method of combating corrosion is the application of enamel, paints, varnish and other substances to the metal structures of the protective layer. This is a kind of barrier that excludes the appearance of corrosion.
The paint on the rust transforms it, as it combines a special anti -corrosion soil and surface enamel. The paint can be placed on a clean, not covered with rust, as well as on a surface already subject to corrosion. Liquid plastic is considered a new and effective way to combat corrosion.