Process for plating chrome from a trivalent chromium plating bath

摘要

A process for plating chromium metal on a substrate, said process comprising contacting the substrate with a plating solution comprising: (a) trivalent chromium ions; (b) sulfate ions and / or sulphonate ions; e (c) manganese ions; where the substrate is made the cathode and insoluble anodes are used; where the concentration of manganese ions is 0.05 to 0.7 g / l.