Research on the Performance of Wear Resistant Coatings for Shielded Pumps

The working environment of the hydrogenation circulation pump is harsh, and the medium conveyed is toxic, corrosive, highly abrasive, flammable and explosive solid or gas, which leads to severe corrosion and erosion of the flow surface. In order to improve the corrosion and erosion resistance of the flow surface of the circulation pump, and improve its overall service life, a supersonic spraying process test was conducted on S321 material based on the Colmonoy 88 and Colmonoy 75 alloy powders produced by a certain company. The microstructure, hardness, bonding force, porosity, corrosion resistance and wear resistance of the coating were analyzed, and the optimal coating preparation process was determined, which was used to simulate product flow surface treatment. Based on the analysis and testing results, the powder and optimal surface treatment process plan for the spray coating of the hydrogenation circulation pump are obtained, which can provide reference for the preparation of wear-resistant coatings for the hydrogenation circulation pump.