ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Cr3C2- NiCr and Cr3C2- NiCr-(25) WC-Co coatings were deposited on T22 boiler steelby High Velocity Oxy-Fuel (HVOF) Technology. The coated as well as the uncoated steel sampleswere exposed to the actual boiler environments in a thermal power plant for 1500 hrs under cyclicconditions to evaluate their erosion-corrosion performance. Weight change measurements weretaken for each sample after every 100 hrs. It has been observed that the weight change trends forcoated steel with Cr3C2- NiCr and Cr3C2- NiCr-(25) WC-Co coatings followed a parabolic trend.The exposed samples were physically investigated for any macroscopic changes after each cycle of100 hours. The uncoated steel showed blisters and spallation of its oxide scale, whereas the coatedsamples exhibited intact oxide scales, in general. Scanning Electron Microscopy/Energy DispersiveX-Ray Analysis (SEM/EDAX) was done to characterize morphology of the oxide scales. Theprotective nature of coatings has been explained based on the results of the study
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.1345.pdf
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