METHODS FOR ELECTROPOLISHING AND COATING ALUMINUM ON AIR AND/OR MOISTURE SENSITIVE SUBSTRATES
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United States of America Patent
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Issued Date -
Jan 19, 2023
app pub date -
Aug 25, 2022
filing date -
Aug 25, 2022
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Abstract
Methods for electropolishing and coating aluminum on a surface of an air and/or moisture sensitive substrate, including: in a vessel, submerging the substrate in a first molten salt bath and applying an anodizing current to the substrate at a first temperature to electropolish the surface of the substrate; wherein the first molten salt bath includes one of a first organic salt bath and first inorganic salt bath; wherein, when used, the first organic salt bath includes one of (a) aluminum halide and ionic liquid, (b) a combination of an aluminum halide and halogenatedmethylphenylsulfone (C6(H5-y, Xy)SO2CX3, where y is a number from 0-5), (c) a combination of an aluminum halide, an ionic liquid, and halogenatedmethylphenylsulfone (C6(H5-y, Xy)SO2CX3), and (d) AlF3-organofluoride-hydrofluoric acid adduct; wherein, when used, the first inorganic salt bath includes aluminum halide and alkali metal halide; and wherein the anodizing current is 10-30 mA/cm2.
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