Environmental friendly chromium-free coating is a new and high-tech surface treatment to replace galvanized, hot dip galvanized and other surface anticorrosive products. It is a real environmental protection product in the surface coating treatment industry. The coating liquid developed and produced by our company using excellent technical formula and foreign high-quality raw materials is an inorganic water-based product composed of zinc and aluminum. It does not contain chromium, mercury, lead, cadmium and other harmful heavy metals.