中文摘要：

为了探究压水堆核电站一回路工况条件对Z3CN20-09M不锈钢的氧化腐蚀行为的影响,采用恒温氧化法对Z3CN20-09M钢在400℃、16.0MPa水蒸气中和400℃空气中的氧化行为进行了对比研究.利用不连续增重法研究其氧化动力学,通过扫描电子显微镜观察氧化膜微观形貌,用能谱分析判断氧化膜成分,X射线衍射仪分析其具体物相组成.试验结果表明：Z3CN20-09M不锈钢在高温高压水蒸气中,氧化动力学曲线遵循双直线规律,在空气中氧化动力学曲线遵循指数规律,水蒸气中腐蚀速率大于空气中腐蚀速率,说明水蒸气对腐蚀有加速作用;高温水蒸汽中氧化膜形貌为针状和大尺寸颗粒状,氧化物为Cr2O3、Fe2O3和FeCr2O4,高温空气中氧化膜形貌为小尺寸颗粒状和絮状,氧化物为Cr2O3和Fe2O3.

英文摘要：

In order to explore the oxidation corrosion behavior of Z3CN20-09M stainless steel used in nuclear power circuit pipeline in simulative running environment, with the constant temperature oxidation,the comparison experiment of oxidation behavior is carried under condition of 400℃ and 16.5 MPa vapor and condition of 400℃ air. The oxidation kinetics is studied using discontinuous increasing weight method, the morphology of micro-structure of oxidation film is observed by scanning electron microscope,and the oxide composition and phase are determined using energy spectrum and X-ray diffractometer. It is concluded： The oxidation kinetics conforms to double linear rule in the high temperature and pressure vapor condition, and in the air condition it conforms to index law. The corrosion rate in vapor is greater than that in the air,which means that water vapor accelerates corrosion of metals. The oxide morphology in vapor is needle and large granular, whose ingredients are Cr2O3, Fe2O3 and FeCr2O4. The oxide morphology in air is small granular and flocculent of Cr2 O3 and Fe2O3.