A Study of Electrochemical Chloride Extraction Method using Auxiliary Electrodes

• Main Authors: Shu-Huan Chen, 陳書煥
• Other Authors: Wei-Chung Yeih
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/97401820088571254766

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 100 === Electrochemical chloride extraction (ECE) is a technique to repel chloride ions out of concrete which uses similar principle as the cathodic protection method, and such a technique is considered as a non-destructive electrochemical technique. In this research, reinforced concrete specimens suffered from chloride contamination are treated with the ECE and two different setups of auxiliary electrodes (vertically arrangement and horizontal arrangement) have been adopted to perform the electrochemical chloride extraction, we evaluate the efficiencies of these two different setups of auxiliary electrodes for ECE and study the influence on the capability of inhibiting corrosion after treatment. The results show that two setups of auxiliary electrodes have no negative influences after treatment in four different properties including mechanical, physical, chemical and electrochemical properties. Although the ECE performance of concrete specimens with horizontal auxiliary electrodes is better than concrete specimens with vertically auxiliary electrodes, both of these setups still seem to be affected by stirrups. However, both setups show a good enough chloride removal that about 60% of the initial chloride ions are removed within 8 weeks. This reveals that using auxiliary electrodes can promote the ECE performance, and reduce the affection of stirrups.