Method for mechanical working in the presence of a cobalt-containing metal
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United States of America Patent
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Aug 13, 2002
Grant Date -
N/A
app pub date -
Apr 26, 2001
filing date -
Sep 7, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method for mechanically working of cobalt-containing metals or performing metalworking with a tool made of a metal containing cobalt. The method is carried out in the presence of an aqueous cooling lubricant containing a combination of an alkanolamine, a mono- or diphosphate ester and a mono- or dicarboxylic acid. The combination is capable of reducing both the release of cobalt ions and the corrosion of iron. In addition it also contributes essentially to the lubrication.
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