Invention Grant
US09328423B2 Liquid trivalent chromate for aluminium or aluminium alloy and method for forming corrosion-resistant film over surface of aluminium or aluminium alloy by using same
有权
用于铝或铝合金的液体三价铬酸盐以及通过使用铝或铝合金在铝或铝合金表面上形成耐腐蚀膜的方法
- Patent Title: Liquid trivalent chromate for aluminium or aluminium alloy and method for forming corrosion-resistant film over surface of aluminium or aluminium alloy by using same
- Patent Title (中): 用于铝或铝合金的液体三价铬酸盐以及通过使用铝或铝合金在铝或铝合金表面上形成耐腐蚀膜的方法
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Application No.: US11450163Application Date: 2006-06-09
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Publication No.: US09328423B2Publication Date: 2016-05-03
- Inventor: Akira Hashimoto
- Applicant: Akira Hashimoto
- Applicant Address: JP Tokyo
- Assignee: DIPSOL CHEMICALS CO., LTD.
- Current Assignee: DIPSOL CHEMICALS CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Hoffmann & Baron, LLP
- Priority: JP2003-410507 20031209
- Main IPC: C23C22/30
- IPC: C23C22/30 ; C23C22/34 ; C23C22/56
Abstract:
The object of the present invention is to provide a method for forming a coating on the surface of an aluminum or aluminum alloy using a trivalent chromate solution which dose not contain any harmful hexavalent chromium, in which the coating has an excellent corrosion resistance and adhesion with paints.The present invention provides a hexavalent chromium free trivalent chromate solution for an aluminum or aluminum alloy, in which the concentration of a trivalent chromium is in the range of from 0.01 to 100 g/L, the concentration of a metal selected from the group consisting of zinc, cobalt, nickel and a combination thereof is in the range of from 0.01 to 100 g/L and the concentration of a fluorine is in the range of from 0.01 to 50 g/L.
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