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Study on the corrosion of copper alloy by friction stir surface processing

Song Weiwei (School of Mechanical Engineering, Jiangsu University, Zhenjiang, China and College of Mechanical and Electrical Engineering, Huangshan University, Huangshan, China)
Xiaojing Xu (School of Mechanical Engineering, Jiangsu University, Zhenjiang, China)
Dunwen Zuo (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Jianli Wang (College of Mechanical and Electrical Engineering, Huangshan University, Huangshan, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 3 May 2016

146

Abstract

Purpose

This paper aims to investigate the modification of surface of a copper alloy by friction stir surface processing (FSSP).

Design/methodology/approach

The metallographic condition of the surface modification was observed using microscopy. Electrochemical corrosion tests were carried out on the modified surface and the corroded surface was observed by scanning electron microscopy (SEM).

Findings

The test results showed that FSSP resulted in refinement of the surface grains of the copper alloy. The degree of refinement was increased with rotation speed and increased in the descending distance of the stirring tool. The corrosion resistance of the modified surface was superior to the base metal except for the surface generated by a rotation speed of 800 rpm and a descending distance 0.1 mm. For the surface modification of the rotation speed of 800 rpm, its corrosion resistance was lower than for the other two rotation speeds. When the rotation speed is specified, the corrosion resistance is improved with increased descending distance. When the descending distance is specified, the corrosion resistance is improved with the rotation speed.

Originality/value

In this study, it was confirmed that the corrosion resistance of the surface modification was best at the rotation speed 1200 rpm and descending distance 0.2 mm.

Keywords

Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant No.51175255) and the Excellent Young Talents Fund key project of the Anhui Higher Education Institutions of China (Grant No. 2013SQRL089ZD).

Citation

Weiwei, S., Xu, X., Zuo, D. and Wang, J. (2016), "Study on the corrosion of copper alloy by friction stir surface processing", Anti-Corrosion Methods and Materials, Vol. 63 No. 3, pp. 190-195. https://doi.org/10.1108/ACMM-11-2015-1609

Publisher

:

Emerald Group Publishing Limited

Copyright © 2016, Emerald Group Publishing Limited

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