Ductile iron power fittings

Nodular iron power fittings are made by pickling iron and steel parts first. In order to remove iron oxide on the surface of iron and steel parts, after pickling, they are cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to hot dip tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.

Compared with other metal protection methods, the hot-dip galvanizing process has the advantages of excellent quality in the protection characteristics of the combination of physical barrier and electrochemical protection of the coating, the bonding strength between the coating and the substrate, the compactness, stability, maintenance free and economy of the coating, and the adaptability to the shape and size of the product. At present, the hot-dip galvanized products mainly include steel plate, steel strip, steel wire, steel pipe, etc., among which the hot-dip galvanized steel plate accounts for a large proportion. For a long time, hot-dip galvanizing technology has been widely used in automobile, construction, household appliances, chemical industry, machinery, petroleum, metallurgy, light industry, transportation, electric power, ocean engineering and other industries because of its low plating cost, excellent protection characteristics and beautiful appearance.