Exfoliation corrosion susceptibility aluminum alloys ASTM

G34-99, Standard test method for exfoliation corrosion susceptibility in 2XXX and 7XXX series aluminum alloys EXCO test. Annual Book of ASTM Standards, ASTM International, Philadelphia, Pa., 2000, p. 124, Vol. 3.02. 

Accelerated tests do not precisely predict long-term corrosion behavior however, answers are needed quickly in the development of new materials. For this resison, accelerated tests are used to screen candidate alloys before conducting atmospheric exposures or other field tests. They also are used for production control of exfoliation-resistant heat treatments for the AA2XXX, AA5XXX, and AA7XXX aluminum alloys. ASTM has standardized several laboratory tests for susceptibility to exfoliation corrosion in recent years. 

Lee, S. and Lifka, B. W., Modification of the EXCO Test Method for Exfoliation Corrosion Susceptibility in 7XXX, 2XXX and Aluminirm-Lithium Alloys, Afew Methods for Corrosion Testing of Aluminum Alloys, ASTM STP 1134, V. S. Agarwala and G. M. Ugiansky, Eds., ASTM International, West Conshohocken, PA, 1992, pp. 1-19. 

ASTM G34 - test method for exfoliation corrosion susceptibility in 2xxx and 7xxx series aluminum alloys (EXCO Test). 

ASTM G66 - test method for visual assessment of exfoliation corrosion susceptibility of 5xxx series aluminum alloys (Asset Test). ASTM G67 - test method for determining the susceptibility to intergranular corrosion of 5xxx series aluminum alloys by mass loss after exposure to nitric acid (Namlt Test). 

S. Lee and B.W. Lifka, Modification of the EXCO Test Method for Exfoliation Coirasion Susceptibility in Ixxx, 2xxx and Aluminum-Lithium Alloys, New Methods for Corrosion Testing Aluminum Alloys, V.S. Agarwala and GA1. Ugiansky, Ed, ASTM, 1992, p 1-19... 

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