FABRICATION AND CHARACTERISTICS OF MNO2 REFERENCE ELECTRODE FOR MONITORING CORROSION IN CONCRETE STRUCTURES
A reliable embeddable reference electrode is an important prerequisite formonitoring corrosion of concrete structures in the long term. In this paper,a new typemaganese dioxide electrode was fabricated by depositing MnO2 on a carbon substrate in 0.25mol/L Mn(CH3COO)2 solution. Characteristics of electrodeposited manganese dioxide (EMD)reference electrodes were investigated by examining open-circuit potential,microstructure,uniformity of potential and polarization behaviour in synthetic concrete pore solutions.Results indicate that there exists an optimal applied polarization potential for fabricatingEMD reference electrodes. EMD reference electrodes showed good stability,desirablepolarization behaviour and better reversibility in synthetic concrete pore solutions at roomtemperature. Further analysis proved that the MnO2/MnOOH ratio of the electrodes plays acritical role on the stability and uniformity of the potential of reference electrodes.
reference electrode manganese dioxide synthetic concrete pore solutions
Shuang LU Hengjing BA Yingzi YANG
School of Civil Engineering,Harbin Institute of Technology,Harbin,PR China
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
1039-1044
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）