Journal
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
Volume 61, Issue 2, Pages 105-110Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/maco.200905267
Keywords
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Funding
- National Natural Science Foundation of China [50701010]
- Ministry of Science and Technology of the People's Republic of China [2005DKA104001]
- Shanghai Leading Academic Discipline Project [B113]
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Ex situ transmission electron microscopy (TEM) was used in conjunction with energy dispersed spectrometry (EDS) to monitor evolution near the pre-selected inclusions during initial stages of localized dissolution on the aluminum alloy (AA) 6061 immersed in 0.1 M NaCl solution. On the alloy TEM foil, Mg2Si phase particles were observed to preferentially dissolve after 3 min immersion. Nevertheless, different dissolution behaviors were observed to form in the vicinities of the different structure Fe-rich precipitates; the trenches were observed near the anorthic phase particle, but no obvious priority dissolution was detected in the vicinity of hexagonal phase particles. The preferential sites of alloy dissolution were found to depend on both the component and the structure of the intermetallics. The shift of electrochemical potential was found
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