Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1987-12-09
1989-11-14
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
148262, C23C 2212
Patent
active
048804762
ABSTRACT:
A corrosion-resistant phosphate chemical conversion coating layer is formed on a steel material surface by a process comprising bringing the steel material into contact with a treatment liquid containing mixed anions consisting of phosphate ions and at least one other type of active anions, at least one type of metal ions, and an oxidizing agent, to provide a phosphate chemical conversion coating layer on the surface of the steel material, wherein the ratio (P/An) in weight of the phosphate ions (P) to the total of mixed anions (An) is 1/2 or less and the temperature of the treatment liquid is maintained at a level of 40.degree. C. or less without external heating.
REFERENCES:
patent: 3082128 (1963-03-01), Craig
patent: 3116178 (1963-12-01), Upham
patent: 3723192 (1973-03-01), Oei
patent: 3819385 (1974-06-01), Scheimicher
patent: 4086103 (1978-04-01), Woods
patent: 4110127 (1978-08-01), Longuepee
patent: 4416705 (1983-11-01), Siemund
patent: 4490185 (1984-12-01), Gottwald
patent: 4497668 (1985-02-01), Mady
Gotou Wataru
Matsuda Shigeki
Mori Kazuhiko
Ohnuki Takahiro
Nihon Parkerizing Co. Ltd.
Nippondenso Co. Ltd.
Silverberg Sam
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