Effect of novel cryogenic treatment in the corrosion behaviour, microstructure analysis and electrochemical properties of Al 6101 closed-cell foam

ABSTRACT

The corrosion behaviour of the closed-cell aluminium foam made of Al 6101 alloy in different heat regimes such as heat treatment (HT), cryogenic treatment (CT) and cryogenic heat treatment (CHT) are investigated in this research work. The Electrochemical Impedance Spectroscopy (EIS) and DC polarisation are the techniques employed in this research work. The microstructure, surface morphology and composition of the treated foam samples are evaluated using a high-resolution Scanning Electron Microscope (SEM) and Energy Dispersive Analysis of X-rays (EDAX). The polarisation and electrochemical impedance measurements of the CT and HT foam samples reveal appealing results in the corrosion resistance when comparing with untreated foam sample. From the SEM images, it is evident that the deep cryogenic treatment changes the morphology of Al 6101 foam and the formation of the Guinier-Preston (GP) zone increases the density of dislocation.

KEYWORDS:

• Al 6101
• closed-cell foam
• cryogenic treatment
• corrosion
• electrochemical impedance
• polarisation
• microstructure

Nomenclature

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Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Zeenath Fathima Syed

Zeenath Fathima Syed is a Research Scholar of BS AbdurRahman Crescent Institute of Science & Technology, Chennai, Tamilnadu,India since July 2013. She received her Bachelors’ in Mechanical Engineeringfrom Bharathiyar University in 2004, and her Masters in CAD/CAM fromSRM University in 2013. She has various publications in National and International Journals.Her areas of research interest are materials science,cryogenics, and finite element analysis.

Tamilarasan T.R

T.R. Tamilarasan received his BE in Mechanical Engineering from VelloreInstitute of Technology, India, ME in Manufacturing Engineering fromAnnamalai University, India and a PhD from B.S. Abdur Rahman Institute,India in 2006, 2008 and 2016 respectively. He has various publications in bothnational and international journals. His current research interests include wear,friction and surface coatings.

Milon Selvam Dennison

Milon Selvam Dennison received his BTech in Mechanical Engineering fromBharath Institute of Higher Education and Research, Chennai, India, ME inManufacturing Engineering from Anna University, India and a PhD fromKarpagam Academy of Higher Education, India in 2007, 2009 and 2018respectively. Presently, he is doing research in the field of metal cutting fluids.He has various publications in both national and international journals. He iscurrently working as Senior Lecturer in the Department of MechanicalEngineering, Kampala International University, Uganda. His current researchinterests include manufacturing of materials, metal cutting, metal cutting fluidsand machining optimisation.