期刊
CORROSION SCIENCE
卷 50, 期 11, 页码 3233-3240出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2008.08.027
关键词
Aluminium; Polarisation; SEM; Pitting corrosion; Repassivation
资金
- Engineering and Physical Sciences Research Council [GR/R51100/01] Funding Source: researchfish
The pitting and repassivation behaviour of two aluminium alloys, AA5083 and spray formed Al-Mg-Li were investigated. The alloys did not exhibit classic repassivation on the back scan instead showing a transition to high current, potential independent behaviour. A series of experiments were performed to establish a clearer understanding of the mechanisms occurring in this region. The switch from pit growth to one-dimensional tunnelling is now believed to cause the transition. This is supported by SEM observation of tunnels using a resin replica technique. Tunnels were seen after the transition, but there was no evidence that tunnels were present before the transition. (C) 2008 Elsevier Ltd. All rights reserved.
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