发明名称 |
Chromium-free rust inhibitive treatment method for metal products having zinc surface and metal surface treated thereby |
摘要 |
<p>Provided is a chromium-free surface treatment method which imparts practical rust inhibitive performance to a metal product having a zinc surface to which it was difficult to impart rust inhibitive performance of practical level. A conversion-coated film of zinc phosphate etc. is formed on the zinc surface of the metal product as pretreatment, and the silica-based film is formed by applying a chromium-free surface treatment agent which uses alcohol or mixture of water and alcohol as a solvent to the conversion-coated film. As a result, when an aqueous surface treatment agent containing alcohol is applied, it is possible to suppress the formation of white rusting for 72 hours or longer in the salt spray test.</p> |
申请公布号 |
EP1683891(A1) |
申请公布日期 |
2006.07.26 |
申请号 |
EP20060001179 |
申请日期 |
2006.01.20 |
申请人 |
HODEN SEIMITSU KAKO KENKYUSHO CO., LTD. |
发明人 |
ENDO, YASUHIKO;TAKASE, KENGO;WATANABE, SHUNJIRO;ADACHI, SHOICHIRO |
分类号 |
C23C22/53;C09D5/08;C23C22/68;C23C22/83 |
主分类号 |
C23C22/53 |
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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