发明名称 |
CHEMICAL CONVERSION LIQUID, METHOD FOR PRODUCING SAME, AND METHOD FOR FORMING CHEMICAL CONVERSION COATING FILM |
摘要 |
Provided is a chromium-free chemical conversion treatment technique that makes it possible to form a conversion layer excellent in corrosion resistance and appearance without using fluorine and hydrogen peroxide. The chemical conversion treatment liquid is for forming a conversion layer on zinc or zinc alloy and free of chromium, hydrogen peroxide and fluorine, includes 0.5 g/L to 38 g/L of magnesium, 0.5 g/L to 3.5 g/L of silicon, and 0.36 g/L or more of nitrate ion, contains the silicon as a water-soluble silicate, optionally further includes cobalt at a concentration of 5 g/L or less, and has an aluminum content of 0.08 g/L or less. |
申请公布号 |
EP2418302(A4) |
申请公布日期 |
2014.07.23 |
申请号 |
EP20100761555 |
申请日期 |
2010.03.12 |
申请人 |
MURATA CO., LTD.;MORIMURA BROS., INC. |
发明人 |
OHTANI, YUSUKE;SUGIOKA, MEGUMI;HASEGAWA, TAKASHI |
分类号 |
C23C22/53 |
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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