气相二氧化硅凝胶态下的板栅腐蚀研究  

Study on grid corrosion under fumed silica gel

作　　者：孙小祥 赵剑曦 SUN Xiao-xiang;ZHAO Jian-xi(School of Chemistry and Chemical Engineering,Qiannan Normal University for Nationalities,Duyun Guizhou 558000,China;Institute of Colloid and Interface Chemistry,College of Chemistry,Fuzhou University,Fuzhou Fujian 350108,China)

机构地区：[1]黔南民族师范学院化学化工学院,贵州都匀558000 [2]福州大学化学学院胶体与界面化学研究所,福建福州350108

出　　处：《电源技术》2018年第4期545-547,582,共4页Chinese Journal of Power Sources

基　　金：浙江超威电源有限公司对本课题的资金资助

摘　　要：采用Tafel极化法、循环伏安法和恒电压腐蚀法分别考查了气相二氧化硅(F-SiO_2)凝胶态下的负极板栅(Pb-Ca合金)和正极板栅(Pb-Ca-Sn-Al合金)腐蚀,结果表明:当F-SiO_2含量超过5%,负极板栅腐蚀电流开始急剧增大,缓蚀率显著减小;F-SiO_2含量约为6%时,正极板栅腐蚀速率最小。综合两方面的结果可见,胶体电解质中F-SiO_2展示了浓度极点(转折)效应,数值在5%~6%(质量分数)。该研究结果对开发F-SiO_2作为胶凝剂以及胶体电解质配方的设计具有重要意义。The corrosion of negative grid(Pb-Ca alloy)and positive grid(Pb-Ca-Sn-Al alloy)under fumed silica(F-SiO2)gel was studied by means of Tafel polarization,cyclic voltammetey and constant voltage corrosion tests.The results show that the corrosion current of negative grid sharply increases and corrosion inhibitor efficiency significantly decreases when F-SiO2 content exceeds 5%.Moreover,the corrosion rate of positive grid is the lowest when F-SiO2 content is 6%.Based on the two aspects,the F-SiO2 in colloidal electrolyte shows an extreme(turning)concentration effect,and the value is 5%-6%.The result is important for the development of F-SiO2 as gelling agent and the design of colloidal electrolyte formula.

关 键 词：气相二氧化硅 胶体电解质 板栅腐蚀 

分 类 号：TM912[电气工程—电力电子与电力传动]