- Cocks, F. H. and Cogley, D. R. and Holleck, G. H. and Hurley, G. F. and Mitchell, C. R., MOLTEN SALT ANODIZATION OF HIGH STRENGTH ALUMINUM ALLOYS EM DASH 1. STRESS CORROSION INHIBITION.,
Corrosion (Houston), vol. 32 no. 4
pp. 135 - 139 .
(last updated on 2007/04/10)
Stress corrosion prevention systems for high strength aluminum alloys have primarily aimed at the total exclusion of the corrosive environment from the metal surface. However, in this approach, the loss of integrity of the coating and concomitant access to the environment will lead to failure. It has now been shown that molten salt anodized coatings on 7075-T651 aluminum reduce stress corrosion cracking (SCC) even when exposed to a corrosive environment, in contrast to previously available anodized coatings, which do not inhibit stress corrosion. Further, when the molten salt anodized coatings are impregnated with a semi-soluble chromate compound, an order of magnitude increase in stress corrosion resistance can be achieved. The conditions for anodization were optimized to yield uniform and reproducible films.
CORROSION PROTECTION - Inhibitors;