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Relationship between Heat Treatments and Corrosion of Al-Si-Mg Casting Alloy

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Abstract:

The casting Al-Si-Mg alloy can be strengthened by heat treatments. There are close relations between heat treatments and alloys mechanical properties and corrosion resistance. The effects of heat treatments condition on corrosion behavior of Al-Si-Mg alloy in NaCl solution were studied by electrochemistry tests and immersion corrosion tests in this paper. The morphology of alloys after immersion corrosion was observed by OM (optical microscopy) and SEM (scanning electron microscopy). The influences of heat treatments on the corrosion of casting Al-Si-Mg alloy were explained. Different microstructures could lead to variation of corrosion properties. The corrosion properties of Al-Si-Mg alloy after casting, ST (solution treatment) and different aging respectively were analyzed. The results show that corrosion properties under PA (peak aging) are the worst and the best ones with ST, at the same time the Icorr under PA are the highest case and the lowest ones with ST.

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Periodical:

Advanced Materials Research (Volume 900)

Pages:

96-99

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.900.96

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Online since:

February 2014

Authors:

Ping Chen*, Li Hua Liang, Gong Luo, Jian Min Zeng

Keywords:

Aging, Al-Si-Mg Alloys, Casting, Corrosion, Electrochemistry

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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