Selective nickel stripping compositions and method of stripping

Details Selective nickel stripping compositions and method of stripping Selective nickel stripping compositions and method of stripping

1984-06-07

1985-11-19

Albrecht, Dennis L.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 3, 134 41, 156664, 252 791, 252 792, 252 794, 252100, 252101, 252102, 252142, 252148, C09K 1304, C09K 1306, C23F 100, C23G 108

Patent

active

045540497

ABSTRACT:
Stripping solutions comprising hydrogen peroxide and sulfamic acid in correlated amounts are effective for the rapid and selective removal of nickel from mild steel surfaces and nickel, nickel alloy and nickel reaction products from alloy substrates. The compositions contain sulfamate, nitrate and chloride and peroxide ions and, preferably, an iron complexing agent such as ethylene diamine tetraacetic acid.

REFERENCES:
patent: 3367874 (1968-02-01), Haviland
patent: 3399143 (1968-08-01), Slominski
patent: 3801512 (1974-04-01), Solenberger
patent: 3856694 (1974-12-01), Becking
patent: 3931030 (1976-01-01), Ohno
patent: 4244833 (1981-01-01), Tomaszewski
patent: 4302246 (1981-11-01), Brindisi
patent: 4459216 (1984-07-01), Nakazato

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