工程科学学报，第40卷，第12期：1518-1524,2018年12月 Chinese Joural of Engineering,Vol.40,No.12:1518-1524,December 2018 DOI:10.13374/j.issn2095-9389.2018.12.010;http://journals.ustb.edu.cn Y预辐照对管流冲刷条件下铍在EDM-1中腐蚀性能 的影响 郑莉芳)，黄俊忠”，王晓刚，姜竹2)，丁玉龙2) 1)北京科技大学机械工程学院，北京1000832)英国伯明翰大学化工学院，伯明翰B152TT ☒通信作者，E-mail:zhenglifang(@ustb.cdu.cn 摘要构建管流式冲刷腐蚀实验装置研究y预辐照对铍在一号电火花加工油(EDM-1)中腐蚀性能的影响，研究铍试样质 量变化，进行表面形貌及成分分析.结果表明，铍在EDM-1管流冲刷条件下受冲刷腐蚀和化学腐蚀的共同作用，前者主要受 试样表面形态影响，后者主要受γ预辐照剂量、杂质元素、EDM-1中含硫有机物等的影响.辐照前后，试样质量均呈现先减 小、后增大、再减小趋势，腐蚀速率基本随辐照剂量的升高而增大.γ预辐照促进了铍试样在EDM-1中点蚀核和蚀孔的产生， 腐蚀2880h后，未接受预辐照试样仅产生较为明显点蚀核，而接受200和100kGy预辐照试样中的部分点蚀核发展成为蚀孔， 前者直径约为后者2倍.点蚀核和蚀孔区域出现Al,Si,Fe、Cr、Ti等杂质元素及S元素，杂质元素为诱导产生点蚀的重要因 素，含S有机物发生化学反应分别生成物理吸附和化学吸附于蚀孔内部的$0，和$0，促进蚀孔的形成及扩展. 关键词铍：y辐照；腐蚀：点蚀 分类号TG146.2 Corrosion of beryllium in EDM-1 fluid after y pre-irradiation ZHENG Li-fang,HUANG Jun-zhong,WANG Xiao-gang,JIANG Zhu),DING Yu-long?) 1)School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)School of Chemical Engineering,University of Birmingham,Birmingham B15 2TT,UK Corresponding author,E-mail:zhenglifang@ustb.edu.cn ABSTRACT Beryllium is one of the most important materials in particle physics and nuclear physics experiments.Among these ap- plications,it is used as the material in particle collision tubes,such as the beam pipe in the operational Beijing Electron and Positron Collider (BEPC II)and in the Circular Electron Positron Collider (CEPC)currently in the planning stage.High-speed particles pro- duce large amounts of y irradiation and impose a heat load on the beam pipe.The beam pipe must be cooled by the scouring fluid to maintain a stable temperature for particle detection;this cooling process will induce fluid erosion of the beam pipe.The corrosion prop- erties of materials in contact with the oil No.I for electric discharge machining(EDM-1)fluid under irradiation are not yet known.A device for testing pipeline corrosion was built to study the corrosion of beryllium in EDM-1 fluid after y pre-irradiation.The mass of the sample was measured by an electronic balance,and the surface morphologies and composition were examined by scanning electron mi- croscopy (SEM),X-ray energy dispersive spectroscopy (EDS),X-ray photoelectron spectroscopy (XPS),and X-ray diffraction (XRD).The results show that the corrosion of beryllium in EDM-1 is affected by two corrosion mechanisms:erosion and chemical corrosion.Erosion is mainly influenced by the surface morphology of the sample,whereas the chemical comrosion is mainly influenced by the dose of y irradiation,impurity elements in the sample,and organic sulfides in EDM-1.Measurements of the sample before and after irradiation reveal that the mass decreases,then increases,and then decreases again under the combined effects of the two kinds of 收稿日期：2018-07-06 基金项目：国家自然科学基金资助项目(11875003)：国家重点研发计划重点专项资助项目(2016Y℉C0802905)工程科学学报,第 40 卷,第 12 期:1518鄄鄄1524,2018 年 12 月 Chinese Journal of Engineering, Vol. 40, No. 12: 1518鄄鄄1524, December 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 12. 010; http: / / journals. ustb. edu. cn 酌 预辐照对管流冲刷条件下铍在 EDM鄄鄄 1 中腐蚀性能 的影响 郑莉芳1) 苣 , 黄俊忠1) , 王晓刚1) , 姜 竹2) , 丁玉龙2) 1) 北京科技大学机械工程学院, 北京 100083 2) 英国伯明翰大学化工学院, 伯明翰 B15 2TT 苣通信作者, E鄄mail: zhenglifang@ ustb. edu. cn 摘 要 构建管流式冲刷腐蚀实验装置研究 酌 预辐照对铍在一号电火花加工油(EDM鄄鄄1)中腐蚀性能的影响,研究铍试样质 量变化,进行表面形貌及成分分析. 结果表明,铍在 EDM鄄鄄1 管流冲刷条件下受冲刷腐蚀和化学腐蚀的共同作用,前者主要受 试样表面形态影响,后者主要受 酌 预辐照剂量、杂质元素、EDM鄄鄄1 中含硫有机物等的影响. 辐照前后,试样质量均呈现先减 小、后增大、再减小趋势,腐蚀速率基本随辐照剂量的升高而增大. 酌 预辐照促进了铍试样在 EDM鄄鄄1 中点蚀核和蚀孔的产生, 腐蚀 2880 h 后,未接受预辐照试样仅产生较为明显点蚀核,而接受 200 和 100 kGy 预辐照试样中的部分点蚀核发展成为蚀孔, 前者直径约为后者 2 倍. 点蚀核和蚀孔区域出现 Al、Si、Fe、Cr、Ti 等杂质元素及 S 元素,杂质元素为诱导产生点蚀的重要因 素,含 S 有机物发生化学反应分别生成物理吸附和化学吸附于蚀孔内部的 SO2和 SOx,促进蚀孔的形成及扩展. 关键词 铍; 酌 辐照; 腐蚀; 点蚀 分类号 TG146郾 2 收稿日期: 2018鄄鄄07鄄鄄06 基金项目: 国家自然科学基金资助项目(11875003);国家重点研发计划重点专项资助项目(2016YFC0802905) Corrosion of beryllium in EDM鄄鄄1 fluid after 酌 pre鄄irradiation ZHENG Li鄄fang 1) 苣 , HUANG Jun鄄zhong 1) , WANG Xiao鄄gang 1) , JIANG Zhu 2) , DING Yu鄄long 2) 1) School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK 苣Corresponding author, E鄄mail: zhenglifang@ ustb. edu. cn ABSTRACT Beryllium is one of the most important materials in particle physics and nuclear physics experiments. Among these ap鄄 plications, it is used as the material in particle collision tubes, such as the beam pipe in the operational Beijing Electron and Positron Collider (BEPC II) and in the Circular Electron Positron Collider (CEPC) currently in the planning stage. High鄄speed particles pro鄄 duce large amounts of 酌 irradiation and impose a heat load on the beam pipe. The beam pipe must be cooled by the scouring fluid to maintain a stable temperature for particle detection; this cooling process will induce fluid erosion of the beam pipe. The corrosion prop鄄 erties of materials in contact with the oil No. 1 for electric discharge machining (EDM鄄鄄1) fluid under irradiation are not yet known. A device for testing pipeline corrosion was built to study the corrosion of beryllium in EDM鄄鄄1 fluid after 酌 pre鄄irradiation. The mass of the sample was measured by an electronic balance, and the surface morphologies and composition were examined by scanning electron mi鄄 croscopy (SEM), X鄄ray energy dispersive spectroscopy ( EDS), X鄄ray photoelectron spectroscopy ( XPS), and X鄄ray diffraction (XRD). The results show that the corrosion of beryllium in EDM鄄鄄1 is affected by two corrosion mechanisms: erosion and chemical corrosion. Erosion is mainly influenced by the surface morphology of the sample, whereas the chemical corrosion is mainly influenced by the dose of 酌 irradiation, impurity elements in the sample, and organic sulfides in EDM鄄鄄1. Measurements of the sample before and after irradiation reveal that the mass decreases, then increases, and then decreases again under the combined effects of the two kinds of