在含U^(6+)模拟地下水溶液中pH对纯铁腐蚀行为和还原沉积U^(6+)的影响  

Effects of pH on Corrosion Behavior of Pure Iron and Reductive Deposition of U^(6+) in Simulated Groundwater Containing U^(6+)

作　　者：褚栋良 黄国凯 王玲钰 崔大庆 李腾 杨淼 CHU Dongliang;HUANG Guokai;WANG Lingyu;CUI Daqing;LI Teng;YANG Miao(School of Chemistry,Chemical Engineering and Life Sciences,Wuhan University of Technology,Wuhan 430070,China;Institute of Radiochemistry,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]武汉理工大学化学化工与生命科学学院,武汉430070 [2]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《腐蚀与防护》2024年第11期31-37,共7页Corrosion & Protection

摘　　要：采用电化学测试、浸泡腐蚀试验、电感耦合等离子体发射光谱仪(ICP-OES)、扫描电子显微镜/能谱分析(SEM/EDS)和X射线光电子能谱分析(XPS)等方法研究了pH对纯铁在含U^(6+)模拟地下水溶液中的腐蚀行为及还原沉积U^(6+)的影响。结果表明:随着pH的升高,纯铁的腐蚀速率逐渐减缓,腐蚀程度逐渐减轻;在初始72 h内,在pH为5.2的溶液中U^(6+)的还原沉积速率最快,随着pH的增大,U^(6+)的还原沉积速率逐渐减慢,在pH为9.2溶液中还原沉积速率最慢;纯铁表面的产物主要为Fe_(2)O_(3)、Fe_(3)O_(4)、Fe(OH)_(3)、FeOOH和UO_(2)。Electrochemical test,immersion corrosion test,inductively coupled plasma emission spectrometer(ICP-OES),scanning electron microscopy/energy dispersive spectroscopy(SEM/EDS)and X-ray photoelectron spectroscopy(XPS)were used to study the effect of pH on the corrosion behavior of pure iron in simulated groundwater containing U^(6+)and reductive deposition of U^(6+).The results show that with the increase of pH,the corrosion rate of pure iron gradually slowed down and the corrosion degree gradually decreased.In the first 72 h,the reductive deposition rate of U^(6+)gradually slowed down with the increase of pH,and it got the fastest value in the solution with pH 5.2,and the slowest value in the solution with pH 9.2.The main corrosion products on pure iron surface were Fe_(2)O_(3),Fe_(3)O_(4),Fe(OH)_(3),FeOOH and UO_(2).

关 键 词：纯铁 模拟地下水 PH 腐蚀 铀还原沉积 

分 类 号：TG172[金属学及工艺—金属表面处理] TL942[金属学及工艺—金属学]