Cleaning and conversion coating of hot rolled steel articles
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United States of America Patent
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-
Sep 4, 2001
Grant Date -
N/A
app pub date -
Aug 5, 1999
filing date -
Aug 6, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is disclosed in which hot rolled steel articles, such as rail car articles, LP tanks and barge articles are cleaned and conversion coated. The cleaning compositions comprise aqueous phosphoric acid, and the conversion coating compositions comprise aqueous phosphate.
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