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Singh, Karanjit
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article
Hot corrosion behaviour of different Cr<sub>3</sub>C<sub>2</sub>–NiCr coatings on boiler tube steel at elevated temperature
Abstract
<jats:sec> <jats:title content-type="abstract-subheading">Purpose</jats:title> <jats:p>This paper aims to investigate hot corrosion behaviour of different Cr<jats:sub>3</jats:sub>C<jats:sub>2</jats:sub>–NiCr coatings on boiler tube steel.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Design/methodology/approach</jats:title> <jats:p>High velocity oxy fuel technique has been used to deposit different coatings on commercially available ASTM-SA213-T22 boiler tube steel. The hot corrosion studies have been performed in molten salt environment at 900°C temperature in silicon tube furnace in laboratory.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Findings</jats:title> <jats:p>The results showed that uncoated superalloy suffered intense spalling and the weight change was massive during each cycle on studies of hot corrosion 900°C. The 100 per cent NiCr and 10 per cent (Cr<jats:sub>3</jats:sub>C<jats:sub>2</jats:sub>) – 90 per cent (NiCr) coatings provided better protection to T22 steel against the hot corrosion because of the formation of Ni and Cr<jats:sub>3</jats:sub>C<jats:sub>2</jats:sub> layers.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Originality/value</jats:title> <jats:p>In this research a variety of coatings have been used. This research work has been aimed to investigate the hot corrosion behavior of Boiler Steel b with different Cr<jats:sub>3</jats:sub>C<jats:sub>2</jats:sub>–NiCr coatings, under molten salt environment in Silicon tube furnace at 900°C, under cyclic conditions.</jats:p> </jats:sec>