热镀锌钢板防腐蚀钝化剂采用六价铬盐已有好几十年的历史。与无铬和三价铬盐产品比较,六价铬盐产品有成本低、生产工艺相对简单、防腐和焊接性能优良等优点。然而,六价铬盐对人类健康带来威胁,因此,最近欧洲一些国家通过法律的形式禁止六价铬盐钝化材料上市,将来可能完全禁止使 Hot dip galvanized steel anti-corrosion passivation using hexavalent chromium salt has been for decades. Compared with chromium-free and trivalent chromium salt products, hexavalent chromium salt products have the advantages of low cost, relatively simple production process, excellent corrosion resistance and welding performance. However, the hexavalent chromium salt poses a threat to human health. Therefore, some countries in Europe recently banned the listing of hexavalent chromium salt passivation materials in the form of law, and may completely ban the use of