Study on the Properties of WC-NiCr and Cr3C2-NiCr Cermet Coating using the Continuous Detonation Spray Method

Abstract To protect structural and functional materials against influence of the severe environments, various coating technologies can be used. This study considers the use of high velocity oxy-fuel process the coatings available for applications based on deposition using the continuous detonation spray process. The properties of the continuous detonation sprayed WC-NiCr and Cr3C2-NiCr cermet coating are investigated through the mechanical, corrosion and wear resistance test. The test results are also compared with the properties of the duplex phase stainless steel substrate and the atmospheric plasma sprayed coatings with the same powders. The corrosion resistance was examined by electochemical method, corrosion potential monitering. Furthermore, the erosion wear resistance was examined by the abrasive and cavitation erosion wear test. The experimental results exhibited that the anti-corrosive and anti-erosive properties of the continuous detonation sprayed coatings are superior to that of their plasma sprayed coatings. It was found that the WC-NiCr cermet coating appears to be more effective than the Cr3C2-NiCr cermet coating in abrasive erosion environment, whereas the Cr3C2-NiCr cermet coating is more effective in cavitation erosion environment.