On cast iron

Designation: Zn

Synonyms: Yellow galvanized.

Price: from 10 rub. per dm²

Purpose:  Galvanic galvanizing of cast iron protects it from corrosion in atmospheric conditions and neutral, non-salty environments. The final rainbow chromatization increases the protective properties of the entire coating several times. Only olive chromate provides the best protection. Cast iron products are more difficult to process than steel products. This is due to the presence of a casting crust on them, the quality of which (density) can vary greatly. Cast irons with a porous casting skin are more difficult to coat. Also, on cast iron, the overvoltage of hydrogen evolution is lower, which facilitates this negative side reaction during alkaline galvanizing, unless special additives are used in the electrolyte.

Designation: Zn

Synonyms: White galvanized.

Price: from 10 rub. per dm²

Purpose:  Colorless galvanizing of cast iron is used to protect parts from corrosion in dry, heated rooms (light operating conditions). In addition to this, chromium plating slightly increases the degree of gloss, which is important for cast iron parts, because they often have a high roughness after casting. The coating is free of toxic hexavalent chromium. Otherwise the coating is similar to rainbow zinc.