Abstract: Steel structures in strong wind-sand areas are subjected to long-term erosion wear by wind-sand flow, which easily leads to the damage of galvanized coatings and threatens the safe service of structures. Taking galvanized coating on steel structures as the research object, this paper systematically investigates the influence of erosion time, erosion angle, wind speed, aspect ratio of specimens and spacing between specimens on the erosion rate of galvanized coatings by combining wind-sand two-phase flow wind tunnel test and computational fluid dynamics (CFD) numerical simulation. The results show that the erosion rate of galvanized coating did not change with time, and the mass loss had a linear relationship with time. The erosion rate first increased and then decreased with the increase of erosion angle, reaching the peak at around 21°, and the decreasing rate slowed down above 60°. The erosion rate had an exponential relationship with wind speed. The erosion rate decreased with the increase of the aspect ratio of the specimen. When the spacing between the double steel pipe specimens was within 40d (where d was the outer diameter of the steel pipe), the spacing had a significant effect on the erosion rate of the rear pipe; beyond 40d, this effect disappears. The simulation results of the CFD discrete phase model (DPM) are in good agreement with the wind tunnel test data, which can effectively characterize the wind-sand erosion wear characteristics of galvanized coatings.