Review of Preparation and Corrosion Resistance of Fe-Al Coatings in Molten Salt

Author of the article:CHEN Weiqian1,2, LA Peiqing1 , LUO Gang2 , XU Shipeng1,2

Author's Workplace：1.State Key Laboratory of Advance Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China. 2. Gansu Key Laboratory of Solar Power Generation System Engineering, Jiuquan Vocational and Technical College, Jiuquan 735000, China

Key Words：Fe-Al intermetallic; protective coatings; corrosion resistance of molten salt; concentrating solar power

Abstract：Concentration solar power (CSP) shows unique advantages in the large-scale development and utilization of solar energy, but the medium of energy storage and the corrosion resistance of materials have become the limits of further improvement of power generation efficiency. Fe-Al intermetallic compounds have excellent performance of high-temperature oxidation and corrosion resistance to molten salt and low cost, thus becoming a candidate material for the protective coating of molten chloride in the next generation CSP power station. In this paper, the latest research status of the physical characteristics, preparation technology, high-temperature oxidation and corrosion resistance of Fe-Al coatings are reviewed. Future research directions and application trends of Fe-Al coatings are proposed, laying a foundation for further research on the corrosion resistance of molten chloride and promoting the high-efficiency development of CSP power stations.