Zinc anode is sacrifacial in order to protect the metal plate to avoid corrosion (rust). These objects can be made either from baan Zinc, Magnesium Aluminum mapun. Widely used in ships generally are dn Aluminum Zinc. Bentuknyapun vary, but in general, rectangular and cylindrical, according to the area it protects. Adequacy depends on the extent of the protected area ajan. Generally sold in units of weight (kg)