摘要
以二-甲基乙醇胺为阻锈剂,通过对比试验,研究电化学除氯法和二-甲基乙醇胺电渗透联合修复钢筋的效果及修复后钢筋的腐蚀电化学性能。结果表明:与二-甲基乙醇胺阻锈剂的自然渗透和单一的电化学除氯法相比较,联合修复技术具有阻锈剂活性基团渗入更为有效与近似相同去除氯离子的能力;随着通电时间、水灰比的增加,氮元素渗入量和氯离子去除数量增加,而随着外加电压的增加,氮元素渗入量和氯离子去除数量先增加后不变;联合修复处理后砂浆中钢筋有很好的钝化保持能力。
In this study, the effect of remediation of steel reinforcement by combining the electrochemical removal of chloride with electro-migration of N,N＆#39;-dimethylaminoethanol and the electrochemical corrosion properties of the steel reinforcement was investigated through a comparative experiment, in which N,N＆#39;-dimethylaminoethanol was used as a corrosion inhibitor. The results show that the combined remediation technology can more quickly transport the inhibition groups into the steel reinforcement, and is similarly effective in removing chloride from the steel reinforcement, when compared with the natural diffusion of N, N＆#39;-dimethylaminoethanol and the single electrochemical chloride removal method. With the increase of the duration of current and the water-cement ratio, the amounts of nitrogen electro-migrated into the specimens and the chloride removed from the specimens increased. In addition, as the applied voltage increased, the amounts of nitrogen electro-migrated into the specimens and the chloride removed from the specimens initially increased, then remained steadily unchanged. After remediation, the steel reinforcement in the mortar exhibited a strong ability to maintain passivation.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第6期535-540,共6页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金(51278168
51278167
51478164)
江苏省博士后科研资助计划(1002019B)
2012年度江苏省高校"青蓝工程"人才计划(苏教师[2012]39号)
深圳市土木工程耐久性重点实验室开放基金(SZDCCE11-03)
关键词
钢筋混凝土结构
电化学除氯
阻锈剂
二
甲基乙醇胺电渗透
联合修复技术
reinforced concrete structure
electrochemical chloride removal
corrosion inhibitor
electroosmosis of N,N＆#39
-dimethylaminoethanol
combined remediation technology
作者简介
王卫仑（1970-），男，陕西汉中人，副教授，博士，主要从事混凝土结构耐久性等研究。E-mail：wang—weilun@hotmail．Com
通信作者：徐金霞，副教授。E-mail：xujinxia@hhu．edu．cn
