发明名称 |
METHOD FOR IMPROVING ADHERENCE |
摘要 |
A method for improving the adhesive capacity of a protectively coated steel sheet is proposed, in which, in a continuous process, a protective coating based on Zn—Al—Mg is applied to the steel sheet and, in a further step, the protective coating undergoes a surface treatment in which an aqueous composition is applied in order to modify the natural oxide layer, which contains Al2O3 and MgO, without pickling this natural oxide layer as a result. In order to significantly increase adhesive capacity of the protectively coated steel sheet, the invention proposes skin-pass rolling the protectively coated steel sheet and then reacting the natural oxide layer with an aqueous fluoride-containing composition, reducing its MgO content in order to this modify the natural oxide layer. |
申请公布号 |
EP3019639(A1) |
申请公布日期 |
2016.05.18 |
申请号 |
EP20140744292 |
申请日期 |
2014.07.11 |
申请人 |
VOESTALPINE STAHL GMBH |
发明人 |
RIENER, CHRISTIAN KARL;FRITZ, DANIEL, ROMAN;HAGLER, JOSEF;HASLINGER, HARALD;HOLZER, EDMUND;LUCKENEDER, GERALD |
分类号 |
C23C2/26;C23C2/40;C23C22/34;C23C22/68;C23G1/10;C23G1/24 |
主分类号 |
C23C2/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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