Sheradising

Sheradising, also known as sherard zinc plating, is one of the methods for applying a zinc coating to fastening materials to give them corrosion protection. The products are placed in a steel barrel together with a prescribed quantity of zinc dust. The barrel is rotated slowly and placed in an oven set to a temperature of approximately 420° C. During the treatment, a 15 to 25 µm thick zinc-iron alloy layer is formed that possesses an excellent corrosion resistance.