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High-Temperature Corrosion Behaviour of CNT-reinforced Zirconium Yttrium Coatings on Boiler Tube Steel in Coal-Fired Boiler of Thermal Power Plant

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Abstract

Corrosion behaviour of carbon nanotubes (CNT)-reinforced zirconium yttrium coatings at high temperature under cyclic thermal loading has been investigated in actual coal-fired boiler environment of thermal power plant. The amount of CNT was varied from 0.5 to 6 wt.%, and the coating was developed by the plasma spray technique. The comparative effects of variation in CNT content on hot corrosion behaviour were studied by weight change measurements. The corroded products were then analysed with XRD, FE-SEM with EDAX and X-sectional analysis techniques. The results revealed that the variation in CNT percentile enhances the hot corrosion resistance of boiler steel in actual boiler environment at elevated temperature. The reinforced coatings showed the lower weight gain measurements with the formation of protective scale of oxides during the experiment. Corrosion rate was observed to be reduced with the increased content of CNT in the coating composite.

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Authors and Affiliations

  1. Mechanical Engineering Department, Guru Kashi University, Talwandi Sabo, Punjab, India

    Sandeep Kumar

  2. Mechanical Engineering Section, Yadavindra College of Engineering, Talwandi Sabo, Punjab, India

    Rakesh Bhatia & Hazoor Singh

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  1. Sandeep Kumar
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  2. Rakesh Bhatia
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Kumar, S., Bhatia, R. & Singh, H. High-Temperature Corrosion Behaviour of CNT-reinforced Zirconium Yttrium Coatings on Boiler Tube Steel in Coal-Fired Boiler of Thermal Power Plant. J Fail. Anal. and Preven. 20, 2029–2039 (2020). https://doi.org/10.1007/s11668-020-01015-4

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