57. What are the sources of alloy components in the galvanized pot?

The sources of various alloy components in zinc liquid can be categorized into three main types. First, natural inclusions inevitably present in commercial zinc or remelted zinc, such as lead, iron, cadmium, copper, arsenic, antimony, and tin. Second, intentional addition of specific alloying elements to zinc liquid for particular purposes, for example, varying aluminum content to modify the surface finish or microstructure of the galvanized layer. Third, unavoidable impurities, including contaminants and dirt that may enter the galvanizing pot during remelting or when cleaning up zinc residue from the floor.