Hastelloy C-276 alloy is one of the few materials that can be used in hot concentrated sulfuric acid solution It is mainly resistant to wet chlorine, various oxidizing chlorides, chloride solutions, sulfuric acid and oxidizing salts, and has good corrosion resistance at low and medium temperatures. Therefore, in the past 30 years, it has been widely used in harsh corrosive environments, such as chemical industry, petrochemical industry, flue gas desulfurization, pulp and paper making, environmental protection and other industrial fields.