... spray material AL2O3, Cr2O3 ceramic, tungsten carbide cobalt, nickel, iron-based alloy powder, hardness HV800 - 1200, coating thickness 0.5mm - ... 1.0mm, roughness ≤ RA0.4 overall ceramic casing. The working conditions of ... wear, severe wear and corrosion under the surface coating layer of non-toxic ceramic coating, so that products with more reasonable ...