Abstract

Abstract This study presents an electrochemical investigation of the corrosion (CF) behavior of 2024‐T3 aluminum alloy, under a constant deflection bending condition with a pulsating tension stress form. The investigation was conducted using both specimens that were anodized in a 3.5% NaCl solution to form a thick porous film and un‐anodized specimens. The Ecorr variations of both types of specimens during the CF process show similarities and differences, and apparent differences also exist between the two types of 2024‐T3 alloy and the high carbon steel. Their behavior presumably can be explained by the ‘cracking of the anodic film’ and the theory of ‘imperfect recovery of the surface film’. It is suggested that the Ecorr monitoring technique can be useful for estimating the remaining CF life of existing structural parts made of this alloy or other Al alloys, anodized or unanodized. Furthermore, the T3 temper provides a microstructure which may retard main crack formation and penetration in the CF proces...

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