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Comparative study of corrosion behaviour of HVOF-coated boiler steel in actual boiler environment of a thermal power plant

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Abstract

The present study was focused on the performance and behaviour of high velocity oxy-fuel (HVOF) sprayed 75Cr3C2-25NiCr and 86WC-10CO-4Cr coatings on boiler steel alloys ASME SA213 T22 and ASME SA213 T91 in coal-fired boiler environment. Both coated and bare steel alloys were subjected to cyclic exposures, in the superheater zone of a coal-fired boiler for 10 cycles at 900° C to compare the effect of both the coatings in actual conditions. During the study, each cycle consisted of 100 h heating followed by 1 h cooling at ambient conditions and to establish the kinetics of corrosion thermogravimetric technique was used. Corrosion products were analysed by using X-ray diffraction (XRD), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) techniques. The hot corrosion resistance of both 75Cr3C2-25NiCr and 86WC-10CO-4Cr coating was found better on ASME SA213 T22 whereas 86WC-10CO-4Cr coating showed higher corrosion resistance on ASME SA213 T22 as compared to 75Cr3C2-25NiCr coating.

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Authors and Affiliations

  1. M.Tech Student, Department of Mechanical Engineering, Punjabi University, Patiala, India

    Varinder Pal Singh Sidhu

  2. Assistant Professor, Department of Mechanical Engineering, Punjabi University, Patiala, India

    Khushdeep Goyal

  3. Associate Professor, Chitkara University, Rajpura, India

    Rakesh Goyal

Authors
  1. Varinder Pal Singh Sidhu
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  2. Khushdeep Goyal
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  3. Rakesh Goyal
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Correspondence to Khushdeep Goyal.

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Sidhu, V.P.S., Goyal, K. & Goyal, R. Comparative study of corrosion behaviour of HVOF-coated boiler steel in actual boiler environment of a thermal power plant. J Aust Ceram Soc 53, 925–932 (2017). https://doi.org/10.1007/s41779-017-0107-x

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