Abstract
In coal fired power plants, the metallic surfaces such as boiler tubes, walls of combustion chambers and other parts degrade by corrosion, erosion and abrasion. It happens due to the hot gaseous environment, steam oxidation and presence of hard minerals and impurities in the coal. It is very important to protect these surfaces from material loss, otherwise it would lead to increased repair and maintenance cost along with decreased plant efficiency. In this paper, the role of thermal spray coatings has been studied for the protection of different steel grades exposed to such degrading conditions at high temperatures, in coal-based power plants. A comprehensive study has been done by analysing and comparing the work done by various researchers. Some recent advancements related to coating materials and modification in coating techniques have also been studied. This paper would be helpful for the researchers to get an idea for selecting an appropriate substrate material and coating material for industrial applications.
About the authors
Deepak Dhand does a PhD in mechanical engineering and a research scholar at Punjabi University, Patiala, Punjab. He works as an assistant professor in Department of Mechanical Engineering at Guru Nanak Dev Engineering College, Ludhiana, Punjab, India. His research interests include hot and cold spray technologies. He has presented papers at national and international conferences.
Parlad Kumar has a PhD in mechanical engineering. He is an associate professor at Department of Mechanical Engineering, Punjabi University, Patiala, Punjab, India. His research interests include thermal spray techniques, manufacturing processes and rapid prototyping. He has published and presented a large number of research papers in national and international journals and conferences. Also, he has completed government funded research projects.
Jasmaninder Singh Grewal is a professor in Department of Production Engineering at Guru Nanak Dev Engineering College, Ludhiana, Punjab, India. He has vast research experience in the field of thermal spray technologies. He has contributed a large number of research papers to national and international journals and conferences.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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