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Hot corrosion performance of bare and coated T91 steel under actual and simulated bio-fuel fired boiler environment

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Title Hot corrosion performance of bare and coated T91 steel under actual and simulated bio-fuel fired boiler environment
 
Creator Kumar, Manoj
Mudgal, Deepa
Ahuja, Lalit
 
Subject Boiler steel
Hot corrosion
Detonation gun
Coating
 
Description 218-227
The conventional fuel has now been replaced by bio-fuels, due to an increasing demand of power supply which
has only been met through the non-renewable resources so far. However, burning of bio-fuel creates corrosive atmosphere
which is different from that of coal and oil firing. Therefore, in the present investigation, bare and coated boiler steel
T91 substrates were exposed to real andsimulated bio-fuel fired boiler environment working at high temperature. It was
noticed that dense and protective oxide was present on Cr3C2-NiCr coated T91 steel after 50hours of exposure in the
simulated environment which depicts the protective behaviour of the coating and compatibility of coating with steel
despite of variation in the composition. However, oxide so formed in actual bio-fuel fired boiler was porous. WC-Co coated
T91 steel has undergone severe corrosion by showing the oxide spallation and delamination of the coating from the substrate
under a simulated environment. Similar observations were noticed in the actual boiler working at the temperature of
750±50°C.
 
Date 2022-05-19T06:36:10Z
2022-05-19T06:36:10Z
2022-04
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/59744
 
Language en
 
Publisher CSIR-NIScPR, India
 
Source IJEMS Vol.29(2) [April 2022]