Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Treating substrate prior to coating
Patent
1996-08-09
1997-05-27
Utech, Benjamin
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Treating substrate prior to coating
205219, 205243, 205285, 205287, 205483, 205484, C25D 534
Patent
active
056328800
ABSTRACT:
A process for galvanic deposition of chromium coatings is provided in which the base material is subjected to a galvanic chromium plating bath to form a hard chromium coating with beaded or columnar type surface structure, and the beaded or columnar type surface structure is subsequently filled and smoothed with galvanically applied black chromium. The resulting combined coatings yield increased wear resistance, lower friction values, even without lubricants, and increased corrosion resistance.
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