SEDL / STP / STP516-EB / STP35426S

Exfoliation Corrosion Testing of 7178 and 7075 Aluminum Alloys

Ketcham, SJ
Naval Air Development Center, Warminster, Pa.

Jeffrey, PW
Alcan Research and Development Ltd, Kingston, Ontario

Pages: 30    Published: Jan 1972

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Abstract

As special heat treatments to improve resistance of aluminum alloys to exfoliation were developed, the need for accelerated testing methods to control production heat treatment arose. A joint task group formed by ASTM Committee GO1.05 and the Aluminum Association has conducted an interlaboratory testing program of various salt spray and immersion tests for 7000 series alloys. A constant immersion test produced the best results.