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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.