Aqueous solution and method for surface treatment of metals

Details Aqueous solution and method for surface treatment of metals Aqueous solution and method for surface treatment of metals

1974-05-31

1976-01-27

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

106 14, 260 296BM, 260 296M, C23F 726

Patent

active

039350355

ABSTRACT:
An aqueous solution for treatment of metal surfaces which has a pH value greater than 7, and comprises no free inorganic acid and 0.1 to 10% by weight, estimated as Cr, of a chromium compound in which 5 to 40% of the initial quantity of Cr(VI) is reduced by a reaction with a trifunctional phenol.

REFERENCES:
patent: 2911332 (1959-11-01), Schuster et al.
patent: 3140204 (1964-07-01), Tokunaga
patent: 3421949 (1969-01-01), Halverson
patent: 3472681 (1969-10-01), Schuster et al.
patent: 3706604 (1972-12-01), Plaxton

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