Selective nickel stripping compositions and method of stripping
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United States of America Patent
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Nov 19, 1985
Grant Date -
N/A
app pub date -
Jun 7, 1984
filing date -
Jun 7, 1984
priority date (Note) -
Expired
status (Latency Note)
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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.
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