Materials Science and Engineering Seminar - Professor Raman Singh

Prof. Amit Arora giving memento to Prof. Raman Singh

Professor Raman Singh (FASM, FIEAust), Department of Mechanical & Aerospace Engineering, and Department of Chemical Engineering, Monash University (Melbourne), Australia gave talk at the MSE Seminar Series, IIT Gandhinagar

Title: Graphene Coatings: A Disruptive Approach to Durable Corrosion Resistance

Abstract

Corrosion and its mitigation costs dearly (any developed economy loses 3-4% of GDP due to corrosion, which translates to ~$250b to annual loss USA). In spite of traditional approaches of corrosion mitigation (e.g., use of corrosion resistance alloys such as stainless steels and coatings), loss of infrastructure due to corrosion continues to be a vexing problem. So, it is technologically as well as commercially attractive to explore disruptive approaches for durable corrosion resistance. Graphene has triggered unprecedented research excitement for its exceptional characteristics. The most relevant properties of graphene as corrosion resistance barrier are its remarkable chemical inertness and impermeability and toughness, i.e., the requirements of an ideal surface barrier coating for corrosion resistance. However, the extent of corrosion resistance has been found to vary considerably in different studies. The author’s group has demonstrated an ultra-thin graphene coating to improve corrosion resistance of copper by two orders of magnitude in an aggressive chloride solution (similar to sea-water). In contrast, other reports suggest the graphene coating to actually enhance corrosion rate of copper, particularly during extended exposures. Authors group has investigated the reasons for such contrast in corrosion resistance due to graphene coating as reported by different researchers. On the basis of the findings, author’s group has succeeded in demonstration of durable corrosion resistance as result of development of suitable graphene coating. The presentation will also assess the challenges in developing corrosion resistant graphene coating on most common engineering alloys, such as mild steel, and presents results demonstrating circumvention of these challenges.

We are grateful to Professor Raman Singh for visiting the campus and interacting with us. It was our sincere pleasure hosting him on the campus.

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Amit Arora
Assistant Professor of Materials Science and Engineering

Amit Arora is Assistant Professor of Materials Science and Engineering at Indian Institute of Technology Gandhinagar. He leads the Advanced Materials Processing Research Group at IIT Gandhinagar which works in the area of numerical modeling of welding and joining processes, additive manufacturing processes, and friction stir welding and processing including tool wear during FSW, numerical modeling of dissimilar FSW, and mechanical and electrochemical characterization of friction stir surface composites. Recent works have been published in journals such as Metallurgical and Materials Transactions A, Journal of Materials Processing Technology, International Journal of Advanced Manufacturing Technology, Heat and Mass Transfer.