File(s) under permanent embargo

The influence of rare earth mercaptoacetate on the initiation of corrosion on AA2024-T3 Part I: average statistics of each intermetallic composition

journal contribution
posted on 01.01.2015, 00:00 authored by Rainier Catubig, A E Hughes, I S Cole, F F Chen, C M MacRae, N C Wilson, A M Glenn, Bruce HintonBruce Hinton, Maria ForsythMaria Forsyth
De-alloying of S-phase in AA2024-T3 in the presence chlorides, is well-known. However, it is unclear how rare earth mercaptoacetate inhibitors affect this process when immersed in a 0.1. M NaCl solution. This paper analyses data obtained using EPMA on AA2024-T3 surfaces before and after a 16. min immersion period. Cerium and praseodymium mercaptoacetate inhibited the de-alloying process of S-phase particles. Although no significant change in composition was observed for cathodic intermetallics, each appeared to participate in local corrosion reactions as evidenced by the development of surface oxides. Clustering between S-phase and one of the Cu-containing intermetallic domains was also evident.

History

Journal

Corrosion science

Volume

95

Pagination

22 - 39

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0010-938X

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Elsevier