Large roll galvanized wire is widely used in practice. Iron wire also has certain harm, easy to rust and corrosion. Therefore, galvanized method can be generally used to prevent corrosion of products. In addition to this method, the commonly used metal treatment methods and phosphating treatment, oxidation treatment, etc. Metal phosphating treatment: iron and steel products to oil, rust removal, into a specific composition of acid solution immersion, can form a layer of insoluble acid film on the metal surface, this process is called phosphating treatment.
Large roll galvanized wire phosphating film is dark gray to black gray, the thickness is generally 5-20μm, in the atmosphere has good corrosion resistance. Membrane is a microporous structure, such as paint adsorption capacity is strong, such as used as paint bottom layer, corrosion resistance can be further advanced. Metal oxidation treatment: the steel products are added to the mixture of NaOH and NaNO2 solution, heating treatment, its surface can form a layer of thickness of about 0.5-1.5μm of blue oxide film, in order to reach the purpose of steel corrosion prevention, this process is called blue treatment, referred to as blue.
This oxide film has greater elasticity and lubricity and does not affect the precision of parts. Therefore, precision instruments and optical instrument parts, spring steel, thin steel sheet, thin steel wire and other commonly used blue processing. Large roll galvanized wire commonly used galvanized treatment, is equivalent to forming a protective layer on the surface of the wire, commonly used hot galvanizing, hot spraying, vacuum plating and other methods, different methods have the corresponding characteristics.
Post time: 14-05-21