Method at treatment of metals
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Nov 27, 1996
filing date -
Nov 28, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method for pickling steel in an acidic aqueous pickling solution containing Fe.sup.3+ and Fe.sup.2+, wherein the steel is contacted with pickling solution that continuously is brought to circulate through a conduit into which hydrogen peroxide is supplied to oxidize Fe.sup.2+ to Fe.sup.3+.
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