Accession Number : AD0764232

Title :   Corrosion and Corrosion Prevention of Light Metal Alloys,

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s) : Pearlstein,Fred ; Teitell,Leonard

Report Date : MAR 1973

Pagination or Media Count : 16

Abstract : The corrosion rates of bare and chromated 2024-T3 aluminum and AZ31b magnesium were determined at several tropical environments (marine, open field, rain forest). Weight losses for magnesium were generally greater than for aluminum, but there were instances of catastrophic exfoliation corrosion of aluminum. Chromate conversion coatings provided effective protection to aluminum, but were only moderately protective to magnesium at the marine site, and provided no protection at nonmarine sites. The effect of environmental factors (i.e., rainfall and saltfall) on corrosion of aluminum and magnesium was studies. The effect of soil burial on corrosion rates was also determined. Double sealing (nickel acetate seal, followed by dichromate seal) of sulfuric anodized aluminum provided superior corrosion resistance over more conventional sealing techniques. (Author)

Descriptors :   (*ALUMINUM ALLOYS, *CORROSION), (*MAGNESIUM ALLOYS, CORROSION), (*COATINGS, *CORROSION INHIBITION), TROPICAL TESTS, CHROMATES, ANODIC COATINGS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE