SEDL / STP / STP610-EB / STP28668S

Air Pollution Effects on Stress Induced Intergranular Corrosion of 7005-T53 Aluminum Alloy

Haynie, FH
Environmental engineer, Environmental Protection Agency, Environmental Research Center, Research Triangle Park, N. C.

Pages: 12    Published: Jan 1976

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Abstract

Through a statistically designed, controlled environment experiment, it was found that atmospheric levels of sulfur dioxide induce a type of stress-accelerated intergranular corrosion in 7005-T53 aluminum alloy extruded tube material. Varying levels of nitrogen dioxide, ozone, relative humidity, and their interactions (including those with sulfur dioxide) did not cause statistically significant damage in this particular experiment. Some level of stress was necessary to cause this type of attack.