发明名称 |
Corrosion-resistant trivalent-chromium chemical conversion coating and solution for trivalent-chromium chemical treatment |
摘要 |
A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01μg/cm2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80° C. and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100° C. water for 10 minutes) is smaller than 0.05μg/cm2. |
申请公布号 |
US2010203327(A1) |
申请公布日期 |
2010.08.12 |
申请号 |
US20080671786 |
申请日期 |
2008.08.04 |
申请人 |
DIPSOL CHEMICALS CO., LTD. |
发明人 |
INOUE MANABU;WATANABE KIMITAKA;NAGATA GO;NAKATANI MOTOI;ISHIZU KEITA;INOMATA TOSHIKI |
分类号 |
B32B9/00;C09D1/00 |
主分类号 |
B32B9/00 |
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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