Advantages of oxide films as bases for aluminum pigmented surface coatings for aluminum alloys

R. W. Buzzard, W. H. Mutchler
naca-tn-400
Nov 1931

Both laboratory and weather-exposure corrosion tests showed conclusively that the protection afforded by aluminum pigmented spar varnish coatings applied to previously anodized aluminum surfaces was greatly superior to that afforded by the same coatings applied to surfaces which had simply been cleaned free from grease and not anodized.

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