Electropolishing process for cobalt and cobalt alloys
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United States of America Patent
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Dec 20, 2011
Grant Date -
Nov 27, 2008
app pub date -
Sep 24, 2007
filing date -
Sep 25, 2006
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Abstract
The present invention relates to a method of electrochemical polishing of surfaces of cobalt or cobalt alloys. It employs an electrolyte comprising glycolic acid and at least one alkane-sulfonic acid with an alkyl residue that has 1 to 3 carbon atoms. This electrolyte is also one aspect of the present invention. In one embodiment, at least one alkane-sulfonic acid comprises methane-sulfonic acid. The electrolyte and the method using this electrolyte are suitable in particular for surfaces of cobalt or cobalt alloys, including cobalt-chromium alloys such as stellite.
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