Invention Application
WO2015134690A1 PASSIVATION OF MICRO-DISCONTINUOUS CHROMIUM DEPOSITED FROM A TRIVALENT ELECTROLYTE
审中-公开
微量不连续铬的钝化从一种多电解质沉积
- Patent Title: PASSIVATION OF MICRO-DISCONTINUOUS CHROMIUM DEPOSITED FROM A TRIVALENT ELECTROLYTE
- Patent Title (中): 微量不连续铬的钝化从一种多电解质沉积
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Application No.: PCT/US2015/018848Application Date: 2015-03-05
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Publication No.: WO2015134690A1Publication Date: 2015-09-11
- Inventor: MERTENS, Marc , TOOTH, Richard , HERDMAN, Roderick, D. , CLARKE, Terence , PEARSON, Trevor
- Applicant: MACDERMID ACUMEN, INC.
- Applicant Address: 245 Freight Street Waterbury, CT 06702 US
- Assignee: MACDERMID ACUMEN, INC.
- Current Assignee: MACDERMID ACUMEN, INC.
- Current Assignee Address: 245 Freight Street Waterbury, CT 06702 US
- Agency: CORDANI, John, L.
- Priority: US14/200,546 20140307
- Main IPC: C25D3/06
- IPC: C25D3/06 ; C25D5/10 ; C25D5/12 ; C25D5/14 ; C25B1/02
Abstract:
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.
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