Abstract
The research studies the effect of corrosion on friction-welded AA6061 aluminium alloy to pure copper with nickel interlayer. The potentiodynamic polarization method was utilized to determine the corrosion rate in the chosen environment. All tests were performed in an aerated 0.6 M NaCl aqueous solution (6.5 pH, 30 °C) to determine characteristics of the corroded areas, specifically the welded region and the parent metals. In this method, the potential of the working electrode was varied with the corresponding current being monitored. It was observed that the parent metal-aluminium alloy (AA6061) was more corroded than the welded regions. Further, specimens welded with lower ‘upset pressure’ were less corroded than those welded with higher ‘upset pressure’. The corrosion rate varied from 0.466 and 356.64 mA/cm2. SEM fractography was used to determine the type and extent of corrosive action, by studying the characteristics across the cross section.
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Acknowledgements
The authors would like to thank Dr. Sathikh, former Vice-Chancellor of Madras University, Met Mech lab Chennai for their help on this experimental work and I.I.T Chennai for friction welding. We also thank the Management of Sathyabama University, Alpha College of Engineering, St. Joseph’s College of Engineering, and SSN College of Engineering.
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Ravikumar, E., Arunkumar, N., Ananthapadmanaban, D., Prabhakaran, V. (2019). Corrosion Studies on Friction–Welded Aluminium Alloy AA6061-T6 to Copper with Nickel Interlayer. In: Lakshminarayanan, A., Idapalapati, S., Vasudevan, M. (eds) Advances in Materials and Metallurgy. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-1780-4_28
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