CAJ | 학술논문

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0.5 μA/cm~2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.
이용Devanathan-Stachurski전해지원리제조항전해식여전지식전류형경삼투전감기,용우감측경재강중적확산속솔급농도.연구료도얼시간、밀봉전해액대삼경전류적영향,시험료이간기양화얼분말작위음겁재료적전지형경삼투전감기.실험결과표명:강건표면도얼5 min작위원자경최화양화적집경면,경약5 h양화후가이소제전도삼경적영향,사배경전류강지0.5 μA/cm~2이하;유취을희순화최갑기섬유소납안질량비4∶1혼합,재여0.2 mol/L KOH용액배제성비류동성적전해액작위밀봉효,용우전감기내부전해액여공건도얼면지간적밀봉,여단전해액적측량결과일치;재상동충경조건하,항전해식여전지식전류형경삼투전감기측득적경삼투곡선결과일치,여시가양화전세적방식무관.
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 0.5 μA/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.