Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1987-06-10
1989-03-14
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
C23C 2233
Patent
active
048121754
ABSTRACT:
An aqueous acidic treating solution and process for forming a chromium-containing passivate coating on the surface of zinc or zinc-aluminum alloys to enhance bare corrosion resistance and inhibit discoloration thereof upon exposure to ambient environments. The treating solution contains as its essential constituents, chromium ions, nitrate ions, phosphate ions.
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patent: 2497905 (1950-02-01), Ostrander
patent: 2527828 (1950-10-01), Kruszynski
patent: 2634224 (1953-04-01), Faucher
patent: 3074827 (1963-01-01), Hoover
patent: 3219489 (1965-11-01), Bellinger
patent: 4131489 (1978-12-01), Newhard
Greenfield Mark A.
Jaeschke Wayne C.
Parker Chemical Company
Silverberg Sam
Szoke Ernest G.
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