石油化工高等学校学报2011，Vol.24Issue(6)：84-89,6.DOI:10.3969/j.issn.1006-396X.2011.06.021
氢对X8O钢在土壤模拟溶液中电化学行为的影响
Effect of Hydrogen on Electrochemical Behaviors of X80 Steel in Simulated Soil Solution
摘要
Abstract
X80 pipeline steel specimens were treated by electrochemical hydrogen charging under various current densities and charging time. The polarization resistance and corrosion rate of X80 steel were analyzed in Yingtan simulated soil solution under the different hydrogen charging conditions. The results show that with the hydrogen charging current density increased from 1 mA/cm2 to 20 mA/cm2, the free-corrosion potential of X80 moved negatively, charge transfer resistance R1 dropped from 1 176 Ω · cm2 to 909 Ω · cm2, double electric layer capacitors increased from 0. 000 16 μF/cm2 to 0. 001 7 μF/cm2 and corrosion current density increased from 3. 322 mA/cm2 to 6. 880 mA/cm2. When filling hydrogen time increased from 1 h to 5 h, Rt changed from 1 522 Ω · cm2 down to 749 Ω · cm2, double electric layer capacitors increased from 0. 000 14 μF/cm2 to 0. 007 5 μF/cm2 and corrosion current density increased from 2. 91 mA/cm2 to 5. 01 mA/cm2. This suggests that electrochemical hydrogen charging result in anodic dissolution rate of the weak spots and concentration of metal ions increased. Hydrogen speeded up anodic dissolution of X80 steel and leaded to higher corrosion sensitivity at the steel surface.关键词
X80钢/电化学充氢/土壤模拟溶液/腐蚀Key words
X80 Steel/Electrochemical hydrogen charging/Simulated soil solution/Corrosion分类
能源科技引用本文复制引用
陈旭,何川,徐杨,吴明..氢对X8O钢在土壤模拟溶液中电化学行为的影响[J].石油化工高等学校学报,2011,24(6):84-89,6.基金项目
国家自然科学基金资助项目(50771053). （50771053）
