关键词：钢铁；腐蚀；超临界水氧化技术；焦化废水；316L不锈钢；625合金
摘 要：The corrosion behavior of 316L stainless steel and alloy 625 were deteced in superciritical water oxidation (SCWO) process for coking wastewater treatment.The operation conditions were 500 ℃, 25 MPa, oxygen ratio of 3.5 and the reaction time of 150 h.Surface morphologies of metal samples, oxide structure and compositions across the oxide thickness of the metal samples after SCWO were analyzed using SEM and ESD, and the corrosion rates for both samples were obtained.Pitting corrosion was found on the surface of 316L stainless steel with a corrosion rate of 0.334 mrn/a.While no remarkable corrosion was found on the surface of alloy 625, and the corrosion rote is 0.052 mm/a.