Journal
CORROSION SCIENCE
Volume 51, Issue 9, Pages 2115-2119Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2009.05.039
Keywords
Aluminum; SEM; X-ray diffraction; Segregation
Funding
- Science and Technology Program of Luoyang, China [0701025A]
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In order to improve the non-uniform corrosion of Al-0.5Zn-0.03In-1Mg-0.05Ti alloys, Al-5Zn-0.03In-1Mg-0.05Ti-xLa (x = 0.3, 0.5 and 0.7 wt.%) alloys were developed. Microstructures and electrochemical properties of the alloys were investigated. The results show that the optimal microstructures and electrochemical properties are obtained in Al-5Zn-0.03In-1Mg-0.05Ti-0.5La alloy. The main precipitate phase is Al2LaZn2 particles. The excellent electrochemical properties of Al-5Zn-0.03In-1Mg-0.05Ti-0.5La alloy is mainly attributed to fine grains and grain boundaries containing fine Al2LaZn2 precipitates. At the same time the fine grains can improve the non-uniform corrosion of Al-0.5Zn-0.03In-1Mg-0.05Ti alloy. (C) 2009 Elsevier Ltd. All rights reserved.
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