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Solid-liquid two-phase flow centrifugal pumps, indispensable equipment for solid-liquid mixed medium transportation in production and daily life, play an essential role in metallurgy, water conservation, and mining. Due to the specifics of operation conditions, the solid-liquid mixture will cause wear-and-tear damage on the wet parts of a solid-liquid two-phase flow centrifugal pump, shorten the service life, and reduce operation stability. The wear of wet parts has great influence on pump performance, such as head and efficiency reduction, vibration intensification, etc. Research studies have been made on the characteristics of erosion caused by solid-liquid flow in pumps. Noon and Kim [1] conducted three-dimensional numerical analysis for the prediction of erosion on the head and efficiency losses for lime slurry flow through centrifugal pumps and found that the temperature effect is critical for erosion damage. Lai et al. [2] employed the Eulerian-Lagrangian approach and combined it with the Grant and Tabakoff particlewall rebound model to predict particle behaviours and erosion wear in the centrifugal pump. The results show that with the increase of the concentrations of solid particles, the frequency of impingement and rebound will increase. The most serious erosion regions are around the middle of the hub and the trailing edge of blades pressure side. Sharma [3] carried out systematic studies of the erosion wear in a centrifugal slurry pump. The results show that the blade erosion rate is 10 times greater than the hub erosion rate. Compared with other parts of the impeller, the erosion rate near the leading edge is more severe. Bross and Addie [4] developed a simple model and predicted the influence of the different parameters on the wear behaviour of an impeller nose in the centrifugal slurry pump. The results show that the wear of the impeller and the liner will decrease with the increase of pressure coefficient and clearing vane height. Effect of Coating Thickness on a Solid-Liquid Two-Phase Flow Centrifugal Pump under Water Medium Luo, K. – Wang, Y. – Liu, H. – Dular, M. – Chen, J. – Zhang, Z. Kaikai Luo1,2 – Yong Wang1,* – Houlin Liu1 – Matevž Dular2 – Jie Chen1 – Zilong Zhang1 1 Jiangsu University, Research Center of Fluid Machinery Engineering and Technology, China 2 University of Ljubljana, Faculty of Mechanical Engineering, Slovenia