Method for cleaning hot dip galvanized steel sheet and cleaning apparatus therefor
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United States of America Patent
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Jan 27, 2015
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N/A
app pub date -
Jan 22, 2007
filing date -
Jan 26, 2006
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Abstract
Cleaning of a hot dip galvanized steel sheet is conducted by bringing a strip-shaped steel sheet which was treated by surface oxidation in advance into contact with a cleaning liquid for 1 second or more, and then bringing the hot dip galvanized steel sheet into contact with pure water, while continuously transferring the hot dip galvanized steel sheet. The method allows efficiently and fully washing off the acidic solution adhered to the surfaces of the hot dip galvanized steel sheet treated by surface oxidation. The invention also provides an apparatus for cleaning the hot dip galvanized steel sheet to carry out the above cleaning method.
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