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Effects of Severe Cold Rolling on Exfoliation Corrosion Behavior of Al-Zn-Mg-Cu-Cr Alloy

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Abstract

The exfoliation corrosion (EXCO) behavior of Al-Zn-Mg-Cu-Cr alloy after severe cold rolling was investigated by optical microscope, transmission electron microscope, and electrochemical technique. The results show that the EXCO resistance decreased with increasing cold rolling reduction because of the grain boundaries which were decorated with the continuously distributed particles. After the solution treatment, the samples with different reductions retained the fibrous grains, and the elongated grains accelerated the growth of the corrosion cracks according to crack propagation analysis. Furthermore, the increase of deformation enhanced the degree of recrystallization, while the number of corrosion cells increased greatly when in the electrolyte, which tended to reduce the resistance to EXCO.

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Acknowledgment

The authors would like to acknowledge the financial support provided by the National Key Fundamental Research Project of China (Grant No. 2005CB623705-04).

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Authors and Affiliations

  1. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, People’s Republic of China

    Lianghua Lin & Zhiyi Liu

  2. School of Material Science and Engineering, Central South University, Changsha, 410083, People’s Republic of China

    Lianghua Lin, Zhiyi Liu, Yao Li, Xiangnan Han & Xu Chen

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  1. Lianghua Lin
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  2. Zhiyi Liu
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  3. Yao Li
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  4. Xiangnan Han
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Correspondence to Zhiyi Liu.

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Lin, L., Liu, Z., Li, Y. et al. Effects of Severe Cold Rolling on Exfoliation Corrosion Behavior of Al-Zn-Mg-Cu-Cr Alloy. J. of Materi Eng and Perform 21, 1070–1075 (2012). https://doi.org/10.1007/s11665-011-9978-0

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  • DOI: https://doi.org/10.1007/s11665-011-9978-0

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