发明名称 |
Method for zinc-phosphating metal surface. |
摘要 |
<p>A zinc phosphate coating film suitable for cationic electrodeposition coating and superior in both of coating film adhesion and corrosion resistance (especially, warm brine resistance and scab resistance) is formed by a conversion treatment of a metal surface using an acidic zinc-phosphating solution which does not contain a nickel ion as an essential component. The conversion treatment is carried out by bringing a metal surface into contact with a zinc-phosphating solution containing a zinc ion of 0.1 to 2.0 g/l, a phosphate ion of 5 to 40 g/l, a lanthanum compound of 0.001 to 3 g/l in terms of a lanthanum metal, and a phosphating accelerator, thereby the zinc phosphate coating film is formed on the metal surface.</p> |
申请公布号 |
EP0564286(A2) |
申请公布日期 |
1993.10.06 |
申请号 |
EP19930302581 |
申请日期 |
1993.04.01 |
申请人 |
NIPPON PAINT CO., LTD. |
发明人 |
JO, MASAHIRO;MINO, YASUTAKE;SOBATA, TAMOTSU |
分类号 |
C23C22/12;C23C22/18;C23C22/36 |
主分类号 |
C23C22/12 |
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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