Corrosion behavior research on austenitic stainless steel in dynamic molten salt

Abstract

In order to identify the corrosion properties of three kinds of austenitic stainless steel used in solar power plant, experiments were conducted to test the weight loss after dynamic immersing in molten salt, the corrosion thickness rates per year was obtained, and the surface morphology by SEM and component of corrosive product by EDS were analyzed. The test result showed that the corrosion resistance of 316L and 347H are outstanding, much better than 304. The corrosion resistance order of the three material is 304 <316L< 347H. 304 and 316L can be considered as the candidate materials of low-temperature molten salt storage tank, and 347H can be used as the materials of high-temperature molten salt storage tank and molten salt heat exchanger.