Ferrous metal article having oxide coating formed from the base metal suitable for brake apparatus et al
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United States of America Patent
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Oct 21, 2003
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N/A
app pub date -
Dec 2, 2002
filing date -
Mar 12, 1999
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Abstract
Disclosed is a ferrous metal article having a protective, adherent, wear resistant coating of metallic oxides and a method of forming a protective, adherent, wear resistant coating of metallic oxides on an iron-chrome article. The coating desirably has a thickness of from about 12.7 to about 102 microns (1/2 mil to about 4 mils) and is formed by exposure of the article to an oxidizing atmosphere, preferably air, preferably during heat treatment of the article.
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