发明授权
- 专利标题: Corrosion resistant trivalent chromium phosphated chemical conversion coatings
- 专利标题(中): 耐腐蚀三价铬磷化化学转化膜
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申请号: US10187179申请日: 2002-06-27
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公开(公告)号: US07018486B2公开(公告)日: 2006-03-28
- 发明人: Promila Bhatia
- 申请人: Promila Bhatia
- 申请人地址: US CT Hartford
- 专利权人: United Technologies Corporation
- 当前专利权人: United Technologies Corporation
- 当前专利权人地址: US CT Hartford
- 代理机构: Bachman & LaPointe, P.C.
- 主分类号: C23C22/00
- IPC分类号: C23C22/00
摘要:
An acidic aqueous solution containing a water soluble trivalent chromium compound is provided with a additive for improving corrosion resistance and reducing precipitation of trivalent chromium over time. A suitable additive is nitrilotris (methylene) triphosphonic acid (NTMP).
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