Influence of surface liquid segregation on corrosion behavior of semi-solid metal high pressure die cast aluminium alloys

The corrosion behavior (in chloride medium) of the surface layer of SSM-HPDC plates of alloys 7075-T6 and 2024-T6 was compared with that of the wrought alloys 7075-T6 and 2024-T6. Potentiodynamic testing was performed in deaerated 3.5%NaCl solution. In separate tests, the open-circuit potential was...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2010-09, Vol.20, p.s837-s841
Main Authors: MASUKU, E.P., MÖLLER, H., CURLE, U.A., PISTORIUS, P.C., LI, W.
Format: Article
Language:English
Subjects:
alloy 2024
alloy 7075
Alloys
Aluminum base alloys
China
Chlorides
Corrosion
Segregations
semi-solid metal (SSM) forming
Semi-solid processing
surface liquid segregation
Wrought alloys
wrought aluminium alloys
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Summary:The corrosion behavior (in chloride medium) of the surface layer of SSM-HPDC plates of alloys 7075-T6 and 2024-T6 was compared with that of the wrought alloys 7075-T6 and 2024-T6. Potentiodynamic testing was performed in deaerated 3.5%NaCl solution. In separate tests, the open-circuit potential was monitored in aerated 3.5% NaCl for 30 min after immersion. The electrochemical tests show that there is no significant difference in the pitting potential of the wrought alloys and that of the Cu-enriched surfaces of the SSM-HPDC alloys.
ISSN:1003-6326
DOI:10.1016/S1003-6326(10)60591-2