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利用扫描电镜、能谱分析和X射线衍射研究质子辐照前后的奥氏体不锈钢AL-6XN在高温高压水中的腐蚀行为。结果表明,未辐照的样品在高温高压水中生成了完整的氧化膜,样品增重随着浸泡时间的增加而增加,温度越高腐蚀增重越显著。经过质子辐照后的材料在290℃/10 MPa水中氧化膜发生了严重的溶解,浸泡后样品出现了失重,在550℃/25 MPa超临界水中外层氧化膜发生了剥落,且浸泡时间越长,氧化膜剥落越严重。质子辐照不影响氧化膜的元素组成和相结构,同时建议了质子辐照后奥氏体不锈钢在高温水中氧化膜剥落的模型。
The corrosion behavior of austenitic stainless steel AL-6XN in high temperature and high pressure water before and after proton irradiation was studied by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The results showed that the intact oxide film was formed in the unirradiated sample in high temperature and high pressure water. The weight gain of the sample increased with the immersion time. The higher the temperature, the greater the corrosion weight gain. The proton irradiated material seriously dissolved the oxide film in 290 ℃ / 10 MPa water, and the sample appeared weightlessness after immersion. The outer oxide film peeled off in 550 ℃ / 25 MPa supercritical water, and the immersion time Long, the more serious oxide film peeling. Proton irradiation did not affect the elemental composition and phase structure of the oxide film. At the same time, a model of oxide film peeling off of high temperature austenitic stainless steel after proton irradiation was proposed.