INFLUENCE OF ALUMINIUM CONTENT ON CORROSION BEHAVIOR OF SUPERPLASTIC Zn-Al ALLOYS

Journal of Chinese Society for Corrosion and protection

2012, Vol. 32

Issue (6): 491-495 DOI:

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INFLUENCE OF ALUMINIUM CONTENT ON CORROSION BEHAVIOR OF SUPERPLASTIC Zn-Al ALLOYS

YANG Lijing, ZHANG Yangming, SONG Zhenlun

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201

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Abstract

The influence of aluminium content on the corrosion behavior of superplastic Zn-Al alloys immersed in simulated acid rain was investigated. The results showed that, the corrosion behavior of the Zn-Al alloy in simulated acid rain solution was related to the microstructure of the alloy. Al-rich phase was prone to preferential attack, but the corrosion rate of the alloy was decreased with the aluminum content of the alloys increases. There was a discontinuous Al-rich phase distributed on the grain boundaries of ZA4 alloy and ZA8 alloy, the corrosion products were loose and the corrosion pits were deeper, that resulted in a relatively high corrosion rate, whereas the corrosion reaction can be effectively blocked by the continuous distribution of Al-rich phase of ZA12 alloy and ZA16 alloy.

Key words: Superplastic zinc alloy corrosion simulated acid rain

Received: 14 December 2011

ZTFLH:

TG171

Corresponding Authors: SONG Zhenlun E-mail: songzhenlun@nimte.ac.cn

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YANG Lijing, ZHANG Yangming, SONG Zhenlun. INFLUENCE OF ALUMINIUM CONTENT ON CORROSION BEHAVIOR OF SUPERPLASTIC Zn-Al ALLOYS. Journal of Chinese Society for Corrosion and protection, 2012, 32(6): 491-495.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I6/491

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