Impact of age hardening on the corrosion characteristics of dissimilar aluminum alloys welded using an innovative MIG welding approach

Sahil Garg; Arulpandian Palanisamy

doi:10.34256/ijceae2325

Sahil Garg GRD Centre for Materials Research, Department of Physics, PSG College of Technology, Coimbatore- 641004, Tamil Nadu, India
Arulpandian Palanisamy Department of Mechanical Engineering, Sri Shakthi Institute of Engineering and Technology, Coimbatore, Tamil Nadu, India

DOI: https://doi.org/10.34256/ijceae2325

Keywords: MIG welding, Tafel polarization analysis, Corrosion Assessment, Heat Treatment, Scanning Electron Microscopy (SEM)

Abstract

An innovative metal transfer technique in MIG welding was utilized to join aluminum-based alloys such as 6061 and 5083. Following welding, the specimens underwent heat treatment to explore their corrosion resistance by modifying their microstructure. Tafel polarization curve analysis was employed to evaluate the corrosion performance of the weld zone. The findings indicated that finer microstructures in the weldment led to a notable shift towards less negative corrosion potentials compared to coarser microstructures observed in the as-welded condition. Scanning electron microscopy and X-ray diffraction were used to investigate the microstructural morphology and phase identification of the weld zone. The findings of these tests revealed a link between microstructure and corrosion behaviours.

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