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Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (20): 2347-2352.     Next Articles

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钢筋在再碱化过程中的电化学行为研究

蒋俊1，张俊喜*,1，鲁进亮1，钱胜杰1，邬永成2，王昆3，屈文俊3   

  1. (1上海电力学院 上海高校电厂腐蚀防护与应用电化学重点实验室 上海 200090)
    (2大唐长春第二热电有限责任公司化学分场 长春 130031)
    (3同济大学土木工程学院 上海 200090)
  • 投稿日期:2011-04-27 修回日期:2011-05-30 发布日期:2011-06-16
  • 通讯作者: 张俊喜 E-mail:zhangjunxi@shiep.edu.cn
  • 基金资助:

    国家自然科学基金;国家自然科学基金

Electrochemical Behavior of the Rebar during Re-alkalization Treatment

Jiang Jun1 Zhang Junxi*,1 Lu Jinliang1 Qian Shengjie1 Wu Yongcheng2 Wang Kun3 Qu Wenjun3   

  1. (1 Shanghai University of Electric Power, Shanghai 200090)
    (2 Datang Changchun Second Thermal Power Co. Ltd., Changchun 130031)
    (3 College of Civil Engineering, Tongji University, Shanghai 200090)
  • Received:2011-04-27 Revised:2011-05-30 Published:2011-06-16
  • Contact: Zhang Jun-xi E-mail:zhangjunxi@shiep.edu.cn

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In this paper, the electrochemical reactions on the rebar during re-alkalization treatment were investigated in two common electrolytes by cyclic voltammetry. According to the electrode reaction of rebar in two different solutions, the influence of Li＋ and Ca2＋ on the electrode reaction was analyzed. Regard to the above process, the reaction kinetics of the rebar electrode in the two solutions was studied by experiment. The results showed that the conversion process between iron of the rebar substrate and different valence of iron oxides or hydroxides was different from that in the saturated calcium hydroxide solution due to the presence of Li＋. Since the adsorption of Ca2＋, the diffusion coefficient of ferric ion was lower than that in Lithium hydroxide. The results could provide theoretical support for the application of the electrochemical re-alkalization technology.

Key words: electrode process, diffusion coefficient, re-alkalization, carbonated concrete, rebar