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公开(公告)号：EP3019639A1
公开(公告)日：2016-05-18
申请号：EP14744292.5
申请日：2014-07-11
发明人： RIENER, Christian Karl , FRITZ, Daniel, Roman , HAGLER, Josef , HASLINGER, Harald , HOLZER, Edmund , LUCKENEDER, Gerald
摘要： The invention relates to a method for improving adherence to a protectively coated steel sheet (2), wherein in a continuous method a protective coating based on Zn-Al-Mg is applied to the steel sheet (2) and, in a further step, is subjected to a surface treatment (6), wherein an aqueous composition (7) is applied in order to modify the natural oxide layer (9) having Al
2 O
3 and MgO without pickling the natural oxide layer. In order to significantly increase adherence to the protectively coated steel sheet, it is proposed that the protectively coated steel sheet (2) is skin-pass rolled and then the natural oxide layer (9) is reacted with an aqueous fluoride-containing composition (7), the MgO content of the natural oxide layer thereby being reduced, in order to thus modify the natural oxide layer (9).-
公开(公告)号：EP3019639B1
公开(公告)日：2019-02-27
申请号：EP14744292.5
申请日：2014-07-11
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公开(公告)号：EP2661517A1
公开(公告)日：2013-11-13
申请号：EP12701073.4
申请日：2012-01-05
发明人： STELLNBERGER, Karl-Heinz , RIENER, Christian K. , LUCKENEDER, Gerald , HOLZER, Edmund , HASLINGER, Harald , HAGLER, Josef
CPC分类号： C23G1/02 , C09J5/02 , C09J2400/163 , C09J2400/166 , C23C2/26 , C23F1/30 , C23G1/10 , Y10T428/12972
摘要： A multi-phase protective layer (2) of a protection-coated substrate (steel strip (1)), comprising zinc and magnesium is subjected to pickling treatment on an intermetallic zinc-magnesium phase (4) using an acid. Independent claims are included for the following: (1) use of acid having a pKs value of less than 0 in surface-treatment process; and (2) surface-treated product.
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