Aluminum surface cleaning agent
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United States of America Patent
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-
Mar 1, 1988
Grant Date -
N/A
app pub date -
Oct 30, 1985
filing date -
Oct 30, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Chromium free cleaning compositions for cleaning aluminum and aluminum alloy surfaces comprising A. from 0.2-4 g/l ferric ion and B. sufficient sulfuric and/or nitric acid to produce a pH of 2 or less. The invention also relates to compositions containing from 0.001-0.5 g/l of fluoride ions.
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