Chemical composition for removing nickel-platinum alloy residues from a substrate, and method for removing such residues

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United States of America Patent

PATENT NO 12031214
APP PUB NO 20220325420A1
SERIAL NO

17642736

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Abstract

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The present invention relates to an aqueous chemical composition C for removing from a substrate selectively under heat residues of a nickel-platinum alloy containing at least 8% by weight of Pt compared to the total weight of nickel-platinum alloy,

    characterised in that it is prepared by mixing a composition B comprising bromide ions and a composition H comprising hydrogen peroxide such that in the composition C, at the moment of mixing, the molar concentration of bromide ions is comprised between 0.15 mol/L and 0.45 mol/L and the molar ratio of hydrogen peroxide with respect to bromide ions is comprised between 1.1 and 2.

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Patent Owner(s)

  • TECHNIC FRANCE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Audouin, Marine Grenoble, FR 2 0
Pizzetti, Christian La Batie Divisin, FR 3 0

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