Publisher : The Korean Institute of Surface Engineering
DOI : 10.5695/JKISE.2014.47.6.323
Title & Authors
Effect of Sealing Materials and Parameters on the Corrosion Resistance of HVOF-Sprayed CrC-NiCr Coatings Jeong, Younghun; Nam, Uk-Hee; Byon, Eungsun; Kang, Tae-Il; Kang, Chung-Yun;
Effects of sealant and sealing procedure on corrosion resistance of high velocity oxy-fuel (HVOF) sprayed coatings were studied. HVOF-sprayed CrC-20NiCr coatings were sealed using three commercial sealants based on phenolics and epoxy. Penetration depth of sealants, measured by fluorescent microscope technique, was between and depending on sealant, sealing condition or sealing procedure. It was found that sealing on rotation status was more effective than that on stationary specimen due to the Coriolis effect of fluid in pores of the coating. From the CASS results, corrosion resistance of properly sealed CrC-20NiCr coatings was equal to that of hexa-valent chromium plating.
High Velocity Oxy-Fuel;HVOF;Thermal spray coatings;Corrosion resistance;Sealing;Porosity;Hexa-valent chromium plating;
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