Current Process HVOF thermal spray is widely used for coating critical wear parts like landing gear, bearing races, valves and turbine components. Generally, fully or partially molten metal, composite, or ceramic droplets are propelled from a gun or torch onto the workpiece. Multiple passes are required to build up the coating, since each pass only deposits ~ 0.0002 in 0.0005 in thickness of ma...

Ceramic coated carbon steel coupons were corrosion tested in water with dissolved salts to simulate exposure to evaporation concentrated groundwater in an underground nuclear repository. Metallography revealed no corrosion at the ceramic metal interface of dense coatings, even though electrical measurements demonstrated that the coatings were slightly porous. Experimental results and a model to...

The purpose of this research was to investigate the cause a slurry erosion failure in an Al2O3-13TiO2 high-velocity oxygen-fuel coating for SS316L steel. Sand particles served as erodent investigation wear and erosion. SS HVOF shown be significantly affected by speed particles, concentration (wt%), exposure period. All characteristics, excluding impingement angle, contribute faster on parent ma...