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http://dx.doi.org/10.5695/JKISE.2014.47.6.323

Effect of Sealing Materials and Parameters on the Corrosion Resistance of HVOF-Sprayed CrC-NiCr Coatings  

Jeong, Younghun (Surface Technology Department, Korea Institute of Materials and Science)
Nam, Uk-Hee (Surface Technology Department, Korea Institute of Materials and Science)
Byon, Eungsun (Surface Technology Department, Korea Institute of Materials and Science)
Kang, Tae-Il (Hydraulic Machinery Division, Dongyang Mechatronics)
Kang, Chung-Yun (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of the Korean institute of surface engineering / v.47, no.6, 2014 , pp. 323-329 More about this Journal
Abstract
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 $19{\mu}m$ and $340{\mu}m$ 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.
Keywords
High Velocity Oxy-Fuel; HVOF; Thermal spray coatings; Corrosion resistance; Sealing; Porosity; Hexa-valent chromium plating;
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Times Cited By KSCI : 1  (Citation Analysis)
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