Instruments

Coatings: galvanizing, phosphating, chromating, anodizing, copper plating, cadmium plating.

There are various coatings of metal products that are used to isolate products from an aggressive environment. We describe the most common of them. Galvanizing is the deposition of zinc or its alloy on a metal product in order to give its surface the required chemical and physical properties, one of the most important is corrosion resistance. Basic galvanizing methods: + Painting (cold galvanizing) + hot galvanizing + Galvanic (plating) + Zinc spraying (thermal spraying galvanizing) + Thermal diffusion galvanizing Phosphating is a chemical process in which the components of a phosphating solution interact with the surface of a metal. Phosphating of the metal provides the required degree of protective properties of coatings. As a result, the development of sub-film corrosion is inhibited, and the adhesion of the coating to the metal is significantly improved. Chromation is the chemical passivation of electrolytically galvanized parts, the essence of which is the short-term immersion of parts in a solution of strong oxidizing agents. As a result of chromating, a strong dense film of zinc oxides is formed on the surface of the galvanized part, which significantly improves its corrosion resistance. — This is the process of creating an oxide film on the surface of metals and alloys using their anodic polarization in a conductive medium. Copper plating is the process of applying a copper coating by galvanic method to steel products. As a rule, it is used to protect areas of metal products from cementation. Those parts of the metal product that are subject to subsequent machining are subjected to this process. Cadmium plating is the process of applying cadmium coatings to a metal surface using an electrolytic deposition method. The purpose of this process is to protect against atmospheric corrosion of products. Also, such a galvanic coating is used for decorative purposes in order to give a pleasant appearance to the surface..

Coatings: galvanizing, phosphating, chromating, anodizing, copper plating, cadmium plating.
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