【作者】 徐诗彤； 肖香逸； 黄建松； 姚美意； 胡丽娟； 林晓冬； 谢耀平； 梁雪； 彭剑超； 李毅丰； 周邦新；

【Author】 XU Shi-tong;XIAO Xiang-yi;HUANG Jian-song;YAO Mei-yi;HU Li-juan;LIN Xiao-dong;XIE Yao-ping;LIANG Xue;PENG Jian-chao;LI Yi-feng;ZHOU Bang-xin;Institute of Materials,Shanghai University;Laboratory for Microstructures,Shanghai University;

【机构】 上海大学材料研究所； 上海大学微结构重点实验室；

【摘要】 为探究蒸汽中的氧(DO)含量对Zr-1Sn-xFe-0.2Cr-0.02Ni (x=0.3,0.45,wt%)合金在500℃过热蒸汽中耐腐蚀性能的影响,本研究将2种合金分别放入静态高压釜和动态高压釜中进行500℃/10.3 MPa/除氧,500℃/10.3 MPa/300μg/kg DO和500℃/10.3 MPa/1000μg/kg DO过热蒸汽腐蚀试验。采用扫描电子显微镜、透射电子显微镜、X射线光电子能谱等表征手段对合金和腐蚀后的氧化膜进行表征及氧化膜中各元素的价态进行分析。结果表明:在除氧和两种DO环境中将Zr-1Sn-xFe-0.2Cr-0.02Ni合金中的Fe含量从0.3%提高到0.45%均会使合金的耐腐蚀性能变差;DO对Zr-1Sn-xFe-0.2Cr-0.02Ni系列合金的腐蚀均具有一定的加速作用,但将合金中的Fe含量从0.3%提高到0.45%会使DO对合金腐蚀的加速程度有所减弱;本文从Fe和DO影响合金元素氧化及氧化膜显微组织演化的角度探讨了Fe和DO加速合金腐蚀的机制。更多还原

【Abstract】 In order to investigate the effect of oxygen(DO) content in steam on the corrosion resistance of Zr-1 Sn-xFe-0.2 Cr-0.02 Ni(x=0.3,0.45,wt%) alloys in superheated steam at 500℃,the two alloys were put into static autoclave and dynamic autoclaves for 500℃/10.3 MPa/deaeration,500℃/10.3 MPa/300μg/kg DO and 500℃/10.3 MPa/1000 ℃g/kg DO superheated steam corrosion tests.Scanning electron microscopy,transmission electron microscopy, X-ray photoelectron spectroscopy and other characterization methods were used to characterize the alloys and the oxide film after corrosion,and the valence state of each element in the oxide film was analyzed.The results show that the corrosion resistance of Zr-1 Sn-xFe-0.2 Cr-0.02 Ni alloys decreases with the increase of Fe content from 0.3 % to 0.45 % in deaeration and two DO environments.DO has a certain acceleration effect on the corrosion of Zr-1 Sn-xFe-0.2 Cr-0.02 Ni alloys,but increasing the Fe content in the alloys from 0.3% to 0.45% can weaken the acceleration of DO on the corrosion of the alloys.In this paper,the mechanism of Fe and DO accelerating corrosion of the alloys was discussed from the perspective of Fe and DO affecting the oxidation of alloying elements and the microstructure evolution of oxide film.更多还原