Cr3C2–NiCr and WC–Ni thermal spray coatings as alternatives to hard chromium for erosion–corrosion resistance

Structure and wear behavior of NiCr–Cr 3 C 2 coatings sprayed by supersonic plasma spraying and high velocity oxy-fuel technologies

“…Therefore, Cr 3 C 2 hard phase can be easily detached from NiCr binder phase under the effect of applied load in the process of friction. In a word, the existence of oxides impurities reduces wear resistance of coating [4]. 8) "Fleisher suggests that wear volume loss are related to applied load in the process of friction."…”

Thermal Sprayed Coatings Used Against Corrosion and Corrosive Wear

“…Toma et al (2001) found similar results, concluding that due to its low erosion-corrosion rate the HVOF sprayed Cr 3 C 2 -NiCr coating can be considered to be an excellent replacement for the thermal sprayed Cr 2 O 3 coatings. Espallargas et al (2008) found that both WC-Ni and Cr 3 C 2 -NiCr coatings are promising alternatives to hard chromium from the point of view of erosion-corrosion resistance.…”

Optimization and Characterization of High Velocity Oxy-fuel Sprayed Coatings: Techniques, Materials, and Applications

“…Due to good durability of the coating, it could be used for the protection of machine components vulnerable to frictional heat and wear, e.g., sliding surfaces such as high-speed spindle. To replace hard chromium coatings in applications under erosion-corrosion exposure, both HVOF sprayed WC-Ni and Cr 3 C 2 -NiCr have been tested to be promising alternatives for those conditions [80]. Cr 3 C 2 -NiCr HVOF coatings manufactured from fine-scale and nano-fractioned powders have proved to have very good mechanical, wear and corrosion properties, and could therefore be used as substitute to hard chromium coating in applications such as cylinders in earth moving machines and piston rings and valve stems applications in automotive industry [81,82].…”