The Characterization of Twin-Wire Arc-Sprayed FeCrBSi Coating and the Application in Sewage Sludge Boilers
Tóm tắt
Incineration in boilers is an environment-friendly treatment for industrial and civil sewage sludge. However, due to the aggressive nature of the sludge, the boiler fireside-surface is subjected to severe wear, erosive, and high temperature corrosion problems during incineration. In this study, we developed an economical FeCrBSi wire material with iron weight content as high as 80%. The coating was prepared by twin-wire arc spraying processing. The chemical compositions of the coating, as well as phase components were analyzed by energy-dispersive spectroscopy and x-ray diffraction method. The surface roughness, porosity, and cross-sectional morphology were further characterized. The coating hardness is close to that of the commercial Armacor M and Armacor C materials. In-boiler test was also carried out. The low thickness loss of the tube indicates a promising application future in sludge boilers.
Tài liệu tham khảo
B. Wang, G. Geng, and A. Levy, Surface Behavior of Heat Exchanger Tubes in Fluidized-Bed Combustors, Surf. Coat. Technol., 1990, 42(3), p 253-274
Y. Kawahara, High Temperature Corrosion Mechanisms and Effect of Alloying Elements for Materials Used in Waste Incineration Environment, Corros. Sci., 2002, 44(2), p 223-245
B. Kowarska, J. Baron, S. Kandefer, and W. Zukowski, Incineration of Municipal Sewage Sludge in a Fluidized Bed Reactor, Engineering, 2013, 5, p 125-134
P. Viklund, A. Hjörnhede, P. Henderson, A. Stålenheim, and R. Pettersson, Corrosion of Superheater Materials in a Waste-to-Energy Plant, Fuel Proc. Technol., 2013, 105, p 106-112
K. Yamada, Y. Tomono, J. Morimoto, Y. Sasaki, and A. Ohmori, Hot Corrosion Behavior of Boiler Tube Materials in Refuse Incineration Environment, Vacuum, 2002, 65(3-4), p 533-540
H.S. Sidhu, B.S. Sidhu, and S. Prakash, Mechanical and Microstructural Properties of HVOF Sprayed WC-Co and Cr3C2-NiCr Coatings on the Boiler Tube Steels Using LPG as the Fuel Gas, J. Mater. Proc. Technol., 2006, 171(1), p 77-82
B. Mann and B. Prakash, High Temperature Friction and Wear Characteristics of Various Coating Materials for Steam Valve Spindle Application, Wear, 2000, 240(1), p 223-230
H.S. Sidhu, B.S. Sidhu, and S. Prakash, Wear Characteristics of Cr3C2-NiCr and WC-Co Coatings Deposited by LPG Fueled HVOF, Tri. Inter., 2010, 43(5), p 887-890
K. Chokethawai, Microstructural Evolution in Fe-Cr-B Based Alloy Powder and Thermally Sprayed Coatings and their Wear Performance. Doctor of Philosophy, The University of Nottingham, 2010
R.H. Unger, Preparation of High-Density Low-Oxidation Coatings by the New Arc Spraying System. 15th International Conference on Thermal Spraying, 1998, p 596-599
K. Venugopal and M. Agrawal, Evaluation of Arc Sprayed Coatings for Erosion Protection of Tubes in Atmospheric Fluidised Bed Combustion (AFBC) Boilers, Wear, 2008, 264(1-2), p 139-145
B. Uyulgan, E. Dokumaci, E. Celik, I. Kayatekin, N.F. Ak Azem, I. Ozdemir, and M. Toparli, Wear Behaviour of Thermal Flame Sprayed FeCr Coatings on Plain Carbon Steel Substrate, J. Mater. Proc. Technol., 2007, 190(1-2), p 204-210