Title: Performance of Al2O3-3%TiO2 Detonation gun coated ferritic steels in coal fired boiler

Authors: Pawan Kumar Sapra, Surendra Singh, Satya Prakash, N. Arivazhagan

Addresses: Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttranchal, 247667, India. ' Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttranchal, 247667, India. ' Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttranchal, 247667, India. ' School of Mechanical and Building Science, VIT University, Vellore 632 014, India

Abstract: Alumina-Titania coatings were obtained by detonation gun thermal spray process on ferritic steels namely T11 (1Cr 0.5 Mo steel ASTM-SA213-T-11) and T22 (2.25 Cr 1 Mo steel ASTM-SA 213-T-22) and were evaluated for their performance inside the running boiler of a thermal power plant. In D-gun process, particle velocity is extremely high which may be effective in increased interlocking between particles and thus highest possible density. Homogeneous and dense coatings performed well and were found to provide adequate protection to the substrate steels.

Keywords: alumina-titania coatings; hot corrosion; D-gun; detonation gun; industrial boilers; EDX analysis; aluminium; titanium; thermal spray; ferritic steels; thermal power plants; coal fired boilers.

DOI: 10.1504/IJSURFSE.2009.024368

International Journal of Surface Science and Engineering, 2009 Vol.3 No.1/2, pp.145 - 156

Available online: 01 Apr 2009 *

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