Corrosion Characteristics of 20# Steel in Water Granulation Sulfur Solidification Process

The method of rotating the suspended metal samples was used to simulate the water granulation sulfur solidification process. Corrosion weight loss method, scanning electron microscopy, EDS and X-ray diffraction(XRD) were used to study the corrosion characteristics of 20# steel in the process which was influenced by temperature and position. The results show that 20# steel corroded severely in the process, the corrosion rate was between 1.111 4 mm/a and 5.962 3 mm/a, and high temperature and erosion would accelerate the rate. Two layers of corrosion products were formed on the surface of 20# steel. The main components of the layers were Fe2O3 and FeS. 20# steel is not suitable for sulfur solidification process. So, to avoid using 20# steel in the process is necessary and the process should be inspected regularly.