电流型氢渗透传感器研究  

Research on the Amperometric Sensor of Hydrogen Permeation

作　　者：欧阳跃军[1,2] 欧爱良[1] 余刚[1] 乔利杰[3] 

机构地区：[1]湖南大学化学化工学院化学生物传感与计量学国家重点实验室,湖南长沙410082 [2]怀化学院化学化工系,湖南怀化418000 [3]北京科技大学'环境断裂'教育部重点实验室腐蚀与防护中心,北京100083

出　　处：《湖南大学学报（自然科学版）》2009年第12期49-52,共4页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(20373015);科技部863基金资助项目(2006AA05Z140);湖南省教育厅科研项目(06B073)

摘　　要：利用Devanathan-Stachurski电解池原理制造恒电解式与电池式电流型氢渗透传感器,用于监测氢在钢中的扩散速率及浓度.研究了镀镍时间、密封电解液对渗氢电流的影响,试验了以羟基氧化镍粉末作为阴极材料的电池型氢渗透传感器.实验结果表明:钢件表面镀镍5 min作为原子氢催化氧化的集氢面,经约5 h氧化后可以消除电镀渗氢的影响,使背景电流降至0.5μA/cm2以下;由聚乙烯醇和羧甲基纤维素钠按质量比4∶1混合,再与0.2 mol/L KOH溶液配制成非流动性的电解液作为密封胶,用于传感器内部电解液与工件镀镍面之间的密封,与单电解液的测量结果一致;在相同充氢条件下,恒电解式与电池式电流型氢渗透传感器测得的氢渗透曲线结果一致,与施加氧化电势的方式无关.Based on the principle of electrochemical hydrogen permeation presented by Devanathan-Stachurski, a potentiostatic electrolyte type and galvani-cell type hydrogen sensors have been developed to determine the permeation rate and the concentration of atomic hydrogen in steels. The effects of plating time and sealed electrolyte on the current of hydrogen permeation were investigated. The galvani-cell type hydrogen sensor using NiOOH powders as the cathodic material was tested. The results have shown that nickel film plated for 5 minutes on steel serves as the catalytic oxidation side of gathering atomic hydrogen. About 5 hours of oxidation treatment can eliminate the hydrogen induced by plating nickel,and the background current can be reduced to 0.5μA/cm ^2. Polyvinyl alcohol and sodium carboxymethyl cellulose were mixed by mass ratio of 4 ： 1 with 0.2 mol/L KOH solution to prepare the ropy electrolyte as a sealant between the internal electrolyte in the sensor and the surface of catalytic nickel, which agrees with the measurement results with single electrolyte sensor. Permeation curves under similar experiment conditions detected with potentiostatic electrolyte type sensor are consistent with those with galvani-cell type hydrogen.

关 键 词：电流型传感器 氢渗透 监测 密封胶 阴极材料 

分 类 号：TG174.3[金属学及工艺—金属表面处理]