The purpose of this research was to investigate the cause of a slurry erosion failure in an Al 2 O 3 -13TiO 2 high-velocity oxygen-fuel coating for SS316L steel. Sand particles served as the erodent in this investigation of wear and erosion. The slurry erosion of SS and HVOF Al 2 O 3 -13TiO 2 coating was shown to be signi cantly affected by speed of particles, concentration (wt.%), and exposure period. All characteristics, excluding impingement angle, contribute to faster wear on the parent material, both bare and coated AISI 316L. Coatings were used to slow down the pace at which the source material deteriorated. As a whole, the Al 2 O 3 -13TiO 2 HVOF coating enhanced the AISI 316L's resistance to erosion by 13.73 percent.