Erosion-corrosion is common engineering problem causes a deterioration failure in many industries including oil and gas production, drilling, process and transportation of minerals including oil sands. This paper highlights fine particles erosion studies on two materials of High-Density Polyethylene (HDPE) and carbon steel under wet sand impact conditions frequently encountered on pipeline surfaces of hydrocarbon production industry. In this study, we perform an experiment to study the influence of fine particle on erosion characteristics of High-Density Polyethylene (HDPE) and carbon steel. In the experimental setup, a closed loop wet erosion technique was adopted, in which the flow speed of a carrier medium was set to be 0.09 m/s and the configuration of the rectangular plate were specified for three impact angles of 30°, 90° and -30° with fine particle sizes of 60 μm. Scanning Electron Microscopic (SEM), hardness test and roughness test of the eroded specimens were conducted to understand characterization of the target surface. SEM and hardness analysis revealed that for carbon steel, the surface of sample angled at 90° encountered significant erosions under impact conditions. It was noticed that hardness of HDPE was not affected at 90° and it encountered less surface roughness loss compared to carbon steel. © 2018 Author(s).