The invention provides a corrosion test method for simulating the steel used for truck body in coal leaching solution, which belongs to the field of metal corrosion atmospheric simulation technology. In this method, the steel used for freight car body was used as the test material, and the mixed solution of 3.5 % NaCl, 0.25 % MgCl, 1 % CaCl, 0.25 % KCl and 10 % NaSO with mass fractions of 3.5 % NaCl, 0.25 % MgCl, 1 % CaCl, 0.25 % KCl and 10 % NaSO was used as the impregnation solution, and the pH value was 3. The wet-dry alternation test was carried out on the specimen in the order of ‘ wetting → drying → hot and humid ’ in the periodic wetting test machine, which was repeated every 60 min, including 15 min of wetting and 15 min of drying. Wet and hot for 30 minutes, dipping solution temperature ( 40 ± 5 ) °C, drying temperature ( 70 ± 5 ) °C, hot and humid temperature ( 40 ± 5 ) °C. The present invention has the characteristics of simulation, acceleration and reproducibility, which can be used to study the corrosion behavior law of the steel used for the car body of the coal truck during service, quickly evaluate and predict its corrosion resistance in the medium of coal leaching solution, and provide the basis for reasonable material selection.
