公开(公告)号：EP3114258A4

公开(公告)日：2018-01-03

申请号：EP15757833

申请日：2015-03-05

申请人： MACDERMID ACUMEN INC

发明人： MERTENS MARC ,  TOOTH RICHARD ,  HERDMAN RODERICK D ,  CLARKE TERENCE ,  PEARSON TREVOR

IPC分类号： C25D3/06 ,  C25B1/02 ,  C25D5/10 ,  C25D5/12 ,  C25D5/14 ,  C25D5/48 ,  C25D9/08

CPC分类号： C25D3/06 ,  C25D5/48 ,  C25D9/08 ,  Y10T428/12854

摘要： A method of treating a substrate, wherein the substrate comprises a layer deposited from a trivalent chromium electrolyte, is described. The method includes the steps of providing an anode and the chromium(III) plated substrate as a cathode in an electrolyte comprising (i) a trivalent chromium salt; and (ii) a complexant; and passing an electrical current between the anode and the cathode to passivate the chromium(III) plated substrate. The substrate may be first plated with a plated nickel layer so that the chromium(III) plated layer is deposited over the nickel plated layer.