发明名称 |
Metal surface-treating method |
摘要 |
This invention provides a metal surface-treating method which comprises a chemical conversion step of dipping a substrate in an acidic aqueous zinc phosphate solution, and using an aqueous zinc nitrite solution as an accelerator, said aqueous zinc nitrite solution being substantially free of calcium ion and containing 0 to 6500 ppm of sodium ion and 0 to 20 ppm of sulfate ion in case of assuming the concentration of zinc nitrite [Zn(NO2)2] therein to be 10 weight % as NO2.
|
申请公布号 |
US6458219(B2) |
申请公布日期 |
2002.10.01 |
申请号 |
US20010853598 |
申请日期 |
2001.05.14 |
申请人 |
NIPPON PAINT CO., LTD.;NIPPON CHEMICAL INDUSTRIAL CO., LTD. |
发明人 |
CHIHARA HIROSHI;TSUGE KENJI;KINOSE YUTAKA;HATA TORU;OKUNO ERIKO;NAGAYAMA TAKAHIRO |
分类号 |
C23C22/13;C23C22/18;C23C22/36;C23C22/73;(IPC1-7):C23C22/12 |
主分类号 |
C23C22/13 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|