Rates and Mechanisms of Combined Erosion and Corrosion of Ceramic-Metallic Coatings/Surfaces

摘要

In the investigation of different carbide-metal HVOF (High Velocity Oxygen Fuel) thermal spray coatings and monolithic cemented carbides exposed to silica sand slurries, the various contributions to erosion-corrosion weight losses have been determined: corrosion (electrochemical weight loss), pure erosion and synergy effects. The effects of metal matrix composition, the electrochemical characteristics and the mechanisms of deterioration are discussed. A duplex stainless steel was used as a reference material.