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Investigation of corrosion and metallurgical characteristics offriction stir-welded magnesium alloy welds under immersion, salt fog, pitting and galvaniccorrosion tests

Published online by Cambridge University Press:  23 January 2014

A. Dhanapal
Affiliation:
Department of Mechanical Engineering, Sri Ramanujar Engineering College, Vandalur, 600 048 Chennai, Tamil Nadu, India. e-mail: [email protected]
S. Rajendra Boopathy
Affiliation:
Department of Mechanical Engineering, College of Engineering, Guindy, Anna University, 600 025 Chennai, Tamil Nadu, India
V. Balasubramanian
Affiliation:
Center for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalainagar, 608 002 Chidambaram, Tamil nadu, India
A.R. Thoheer Zaman
Affiliation:
Department of Mechanical Engineering, Sri Ramanujar Engineering College, Vandalur, 600 048 Chennai, Tamil Nadu, India. e-mail: [email protected]
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Abstract

An investigation was carried out to quantify and characterize the corrosion behavior ofAZ61A magnesium alloy joints. Extruded 6-mm-thick Mg alloy plates of AZ61A grade werebutt-welded using a solid-state, environmentally cleaner welding process, the frictionstir welding process. The weld specimens underwent immersion, salt spray, pitting andgalvanic corrosion tests in order to quantify and characterize the corrosion rates of thewelds with the influence of different pH values, chloride ion concentrations and thecorrosion time. The corrosion rates, microstructure, scanning electron microscopy andX-ray diffraction analysis concluded the optimum parameters for the usage of the magnesiumalloy welds for the best service applications.

Type
Research Article
Copyright
© EDP Sciences 2014

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