Corrosion Resistant Chromate Conversion Coatings for Heat-Treated Aluminum Alloys.
Patent, Filed 19 Mar 91, patented 23 Jun 92,
COURTNEY AND CO PHILADELPHIA PA
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An improved method of coating 7000 series aluminum alloys, which are difficult to coat uniformly, with a coating resistant to long term corrosion in a salt spray environment is disclosed. By using a chromate solution of very low pH and applying that solution first as a cleaner, followed by brush application to form the final coating, an extended resistance to corrosion at least 2 to 3 times the usual duration is achieved readily.
- Inorganic Chemistry
- Physical Chemistry
- Properties of Metals and Alloys