journal article·2015-06Open access

The influence of rare earth mercaptoacetate on the initiation of corrosion on AA2024-T3 Part II: The influence of intermetallic compositions within heavily attacked sites

R. Catubig, A.E. Hughes, I.S. Cole, F.F. Chen, C.M. MacRae, N.C. Wilson, A.M. Glenn, B.R.W. Hinton, M. Forsyth

Corrosion Science· Volume 95

Abstract

Localised corrosion is typical on AA2024-T3 due to intermetallic particles embedded in the alloy. The effect of intermetallic compositions on corrosion are not yet fully understood. EPMA data on AA2024-T3 surfaces before and after a 16. min immersion, analyses the influence of intermetallic clustering on the severity attack at local sites. While sites with a high number of domains and a large S-phase surface area typically lead to severe attack, maximising these features did not always lead to severe corrosion attack. Cerium or praseodymium mercaptoacetate inhibited corrosion ring formation. The common trends observed from such attack sites was also discussed.
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Research context

OpenAlex topics: Corrosion Behavior and Inhibition · Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties

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