METHOD FOR SURFACE TREATMENT OF A PROTECTIVELY COATED SUBSTRATE
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United States of America Patent
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Issued Date -
Nov 28, 2013
app pub date -
Jan 5, 2012
filing date -
Jan 5, 2011
priority date (Note) -
Abandoned
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Abstract
A method is shown for surface-treating a protectively coated substrate (1), more particularly steel strip, for the purpose of enhancing the strength of adhesion with an adhesive (10), where the at least partly multi-phase protective coat (2) comprises at least zinc and magnesium. In order to provide a particular suitability for adhesive bonding, it is proposed that the protective coat (2) be subjected to a pickling treatment, directed substantially at at least one intermetallic Zn—Mg phase (4) of the protective coat (2), with acidic pickle, more particularly acid.
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