Rruspert coating is an environmentally friendly coating developed after Dacromet (zinc chromate), and it is also an upgraded coating. Compared with Dacromet, it has acid and alkali resistance (chromium free and trivalent or hexavalent chromium galvanized layers can be selected as the bottom layer to achieve high corrosion resistance). It not only has the advantage of Dacromet's resistance to atmospheric corrosion, but also is harder than zinc chromate coating. The processed products have stronger resistance to assembly damage, and the processed workpieces have no hydrogen embrittlement concerns because the process helps eliminate internal stress on the workpiece. It can be made in various colors such as bright silver, gray, grey silver, dark red, yellow, military green, black, etc. Rruspert coating has been widely used in road, vehicle, ship, hardware, telecommunications, machinery, electrical and other fields in Europe and America.