Power Plant
Journal of Minerals & Materials Characterization & Engineering, Vol. 10, No.4, pp.367-385, 2011 jmmce.org Printed in the USA. All rights reserved
Hot Corrosion & Erosion Problems in Coal Based Power Plants in India and Possible Solutions – A Review
Vikas Chawlaa*, Amita Chawlab, D. Puric, S. Prakashc , Prema G. Gurbuxanid and Buta Singh Sidhue
Mechanical Engineering Department, F.C.E.T. Ferozepur-152002, India Chemistry Department, Govt. Brijindra College,Faridkot-151203,India c Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India d Chemistry Department, Smt. C. H. M. College,Ulhasnagar-421003,India e Dean (Academics), P.T.U., Jalandhar-144001,India b a
*Corresponding author: vikkydmt@iitr.ernet.com
ABSTRACT Hot corrosion and erosion are recognized as serious problems in coal based power generation plants in India. The coal used in Indian power stations has large amounts of ash (about 50%) which contain abrasive mineral species such as hard quartz (up to 15%) which increase the erosion propensity of coal. Hot corrosion and erosion in boilers and related components are responsible for huge losses, both direct and indirect, in power generation. An understanding of these problems and thus to develop suitable protective system is essential for maximizing the utilization of such components. These problems can be prevented by either changing the material or altering the environment or by separating the component surface from the environment. Corrosion prevention by the use of coatings for separating material from the environment is gaining importance in surface engineering. Keywords: Hot corrosion, erosion, Thermal spraying (TS), Physical vapour deposition (PVD), Chemical vapour deposition (CVD), Nanostructured coatings.
1. INTRODUCTION The attainment of high temperatures has been important in the development of civilization for many countries [1]. Structural materials in many front-line high technology areas have
Hot Corrosion & Erosion Problems in Coal Based Power Plants in India and Possible Solutions – A Review
Vikas Chawlaa*, Amita Chawlab, D. Puric, S. Prakashc , Prema G. Gurbuxanid and Buta Singh Sidhue
Mechanical Engineering Department, F.C.E.T. Ferozepur-152002, India Chemistry Department, Govt. Brijindra College,Faridkot-151203,India c Metallurgical & Materials Engineering Department, I.I.T. Roorkee, Roorkee-247667, India d Chemistry Department, Smt. C. H. M. College,Ulhasnagar-421003,India e Dean (Academics), P.T.U., Jalandhar-144001,India b a
*Corresponding author: vikkydmt@iitr.ernet.com
ABSTRACT Hot corrosion and erosion are recognized as serious problems in coal based power generation plants in India. The coal used in Indian power stations has large amounts of ash (about 50%) which contain abrasive mineral species such as hard quartz (up to 15%) which increase the erosion propensity of coal. Hot corrosion and erosion in boilers and related components are responsible for huge losses, both direct and indirect, in power generation. An understanding of these problems and thus to develop suitable protective system is essential for maximizing the utilization of such components. These problems can be prevented by either changing the material or altering the environment or by separating the component surface from the environment. Corrosion prevention by the use of coatings for separating material from the environment is gaining importance in surface engineering. Keywords: Hot corrosion, erosion, Thermal spraying (TS), Physical vapour deposition (PVD), Chemical vapour deposition (CVD), Nanostructured coatings.
1. INTRODUCTION The attainment of high temperatures has been important in the development of civilization for many countries [1]. Structural materials in many front-line high technology areas have