Metal stripping additive, composition containing the same, and method for stripping metal by using the composition
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United States of America Patent
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Dec 13, 2016
Grant Date -
Apr 14, 2016
app pub date -
Dec 17, 2015
filing date -
Feb 22, 2013
priority date (Note) -
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Abstract
The present invention provides a metal stripping additive, composition containing the same, and method for stripping metal by using the composition. The metal stripping additive comprises a phosphate, a carbonate, and a component selected from at least one of citric acid or a derivative thereof, oxalate or a derivative thereof, malate or a derivative thereof. The metal stripping additive is used with nitric acid as the metal stripping composition of the present invention. The present method has advantages of being capable of stripping various metals, low corrosion, low toxicity, and being applicable under ambient temperature.
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