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HomeAdvanced Engineering ForumAdvanced Engineering Forum Vol. 41Experimental Analysis of Hot Corrosion Behaviour...

Experimental Analysis of Hot Corrosion Behaviour of some Composite Coatings on Boiler Steel at Elevated Temperature

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Abstract:

Hot corrosion is the main reason of failure of boiler tubes used at high temperature in thermal power plants. This paper is an attempt to investigate the effect of different composite coatings on boiler tube steel in corrosive environment of Na₂SO₄ – 60%V₂O₅ at 900°C for 50 cycles. The coatings have been deposited with high velocity oxy fuel process. The samples were exposed to hot corrosion in a Silicon tube furnace at 900°C for 50 cycles. The kinetics of corrosion behaviour were analysed by the weight gain measurements after each cycle. Corrosion products were analysed with weight change statistics, X-ray diffraction, and scanning electron microscopy. It is found that 100Cr₃C₂ composite coatings provided the higher resistance to corrosion as compared to other types of coatings. Cr carbide layer was formed on the surface and these layers provided the protection from hot corrosion.

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Advanced Engineering Forum Vol. 41

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Periodical:

Advanced Engineering Forum (Volume 41)

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43-54

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https://doi.org/10.4028/www.scientific.net/AEF.41.43

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Online since:

July 2021

Authors:

Prince Puri, Khushdeep Goyal*, Rakesh Goyal, Bal Krishan

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Alloys, Boiler Steel, Corrosion, Steel, Thermal Power Plant

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© 2021 Trans Tech Publications Ltd. All Rights Reserved

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