The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1987
Filed:
Nov. 03, 1986
Applicant:
Inventors:
Assignee:
Nippon Kokan Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 445 ; 204 431 ;
Abstract
The invention provides a Cr alloy plating bath comprising a sulfate bath consisting essentially of divalent Cr ion and trivalent Cr ion in a total amount of between 1.5 to 2.0 mol/l, cation of one or more than two selected from the group consisting of potassium ion, sodium ion and ammonium ion in a total amount of 1.5 to 2.5 mol/l, and metal ion of one or more than two selected from the group consisting of Fe, Ni and Co, in an amount of less than 0.6 mol/l, wherein the invention provides stable plating, without requiring a separation between electrolytes with a diaphragm, and provides good deposition at high current efficiencies.