双层镀铬工艺的应用,实践证明其装饰性及防腐蚀性均超过以铜镍作底层的多层电镀.优点是:镀液维护简单,操作方便,退修容易,局部电镀易保护,电镀时间短,防腐蚀性能好.首先在钢铁基体金属上镀一层孔隙较少、韧性好、无网裂纹的抗腐蚀较好的乳白铬层,表面再复盖一层硬度较好,光亮细致,分散力较强的复合镀层,封闭了乳白铬层的微孔,达 Double chrome plating process, the practice proved that its decorative and anti-corrosion are more than copper-nickel as the underlying multi-layer plating. Advantages: bath maintenance is simple, easy to operate, easy repair, partial plating easy to protect, electroplating time Short, good corrosion resistance. First of all, a layer of milky chrome layer with less porosity, good toughness and no net crack is better plated on the steel base metal. The surface is covered with a layer of better hardness, light and fine, dispersed Strong composite coating, closed milky chromium layer of micropores, up