Invention Grant
- Patent Title: Composition and processes of a dry-in-place trivalent chromium corrosion-resistant coating for use on metal surfaces
- Patent Title (中): 用于金属表面的现场干燥的三价铬耐腐蚀涂层的组成和工艺
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Application No.: US11674339Application Date: 2007-02-13
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Publication No.: US08092617B2Publication Date: 2012-01-10
- Inventor: Kirk Kramer , Lisa Salet
- Applicant: Kirk Kramer , Lisa Salet
- Applicant Address: DE Duesseldorf
- Assignee: Henkel AG & Co. KGaA
- Current Assignee: Henkel AG & Co. KGaA
- Current Assignee Address: DE Duesseldorf
- Agent Mary K. Cameron
- Main IPC: C23C22/48
- IPC: C23C22/48
Abstract:
Corrosion resistant coatings are formed on aluminum by contacting with aqueous solutions containing trivalent chromium ions and fluorometallate ions, the solutions being substantially free of hexavalent chromium. Trivalent chromium films formed on the aluminum surface when tested in 5% NaCl salt spray chamber showed corrosion resistance in excess of 168 hours. Trivalent chromium coated aluminum also serves as an effective base for paint primers.
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