High temperature corrosion behavior of Super304 H stainless steel in Na_2SO_4,K2_SO_4,KCl mixed molten salt environment and SO_2+O_2 atmosphere environment was studied at 600 ℃, 650 ℃, 700 ℃. The morphology, phase composition and element distribution of corrosion product were studied by SEM, XRD and EDS. The oxidation dynamic curves of Super304 H under two environmental conditions were measured. The corrosion mechanisms in the two different corrosion conditions were explored. The results show that Super304 ...