FLUX COMPOSITIONS FOR STEEL GALVANIZATION
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United States of America Patent
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May 1, 2014
app pub date -
Oct 24, 2013
filing date -
Oct 25, 2012
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Abstract
This invention relates to a flux composition for treating a metal surface, comprising (a) more than 40 and less than 70 wt. % zinc chloride, (b) 10 to 30 wt. % ammonium chloride, (c) more than 6 and less than 30 wt. % of a set of at least two alkali metal chlorides including sodium chloride and potassium chloride, (d) from 0 to 2 wt. % lead chloride, and (e) from 0 to 15 wt. % tin chloride, provided that the KCl/NaCl weight ratio of said set of at least two alkali metal chlorides ranges from 2.0 to 8.0.
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