caa a22 4500 445844116 CHVBK 20180317145353.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s11085-011-9245-7 doi (NATIONALLICENCE)springer-10.1007/s11085-011-9245-7 Comparative High Temperature Analysis of HVOF-Sprayed and Detonation Gun Sprayed Ni-20Cr Coating in Laboratory and Actual Boiler Environments [Elektronische Daten] [G. Kaushal, H. Singh, S. Prakash] High-velocity-oxy-fuel (HVOF) spray and detonation-gun (D-gun) spray techniques were used to deposit Ni-20Cr coatings on a commonly used boiler steel ASTM-SAE 213-T22. The specimens, with and without coating, were subjected to molten salt (Na2SO4-60%V2O5) deposition in a laboratory furnace at 900°C to determine hot-corrosion resistance. Specimens were also exposed to the superheater zone of a thermal power plant boiler at an average temperature of 700°C under cyclic conditions to ascertain their erosion-corrosion (E-C) behavior. Mass-change measurements were taken to approximate the kinetics of corrosion and erosion-corrosion. In the case of E-C, the thickness lost data were also taken at the end of the exposure. The exposed specimens were characterized by X-ray diffraction (XRD) and field-emission scanning electron microscopy/energy dispersive spectroscopy (FE-SEM/EDS). The HVOF-sprayed coating was found to be intact during exposure to both given environments; whereas the D-gun coating showed spallation of its oxide scale during exposure to the molten salt environments. An overall analysis of the results indicated that the HVOF-sprayed Ni-20Cr coating should be a better choice for the given boiler applications. Springer Science+Business Media, LLC, 2011 Over-lay coating nationallicence Erosion-corrosion nationallicence Hot-corrosion nationallicence Protective coating nationallicence Boiler environment nationallicence Kaushal G. RIMT-Institute of Engineering & Technology Mandi Gobindgarh, Punjab, India aut Singh H. Indian Institute of Technology Ropar, Rupnagar, Punjab, India aut Prakash S. Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India aut Oxidation of Metals Springer-Verlag 76/3-4(2011-10-01), 169-191 0030-770X 76:3-4<169 2011 76 11085 https://doi.org/10.1007/s11085-011-9245-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-011-9245-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kaushal G. RIMT-Institute of Engineering & Technology Mandi Gobindgarh, Punjab, India aut NATIONALLICENCE 700 1- Singh H. Indian Institute of Technology Ropar, Rupnagar, Punjab, India aut NATIONALLICENCE 700 1- Prakash S. Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India aut NATIONALLICENCE 773 0- Oxidation of Metals Springer-Verlag 76/3-4(2011-10-01), 169-191 0030-770X 76:3-4<169 2011 76 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer