金属学报  2011, Vol. 47 Issue (6): 735-742    DOI: 10.3724/SP.J.1037.2011.00057

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模拟混凝土孔隙液中钢筋表面膜组成与腐蚀行为的关联

陈雯,杜荣归,胡融刚,时海燕,朱燕峰,林昌健

厦门大学化学化工学院化学系固体表面物理化学国家重点实验室, 厦门 361005

CORRELATION BETWEEN COMPOSITION OF REINFORCING STEEL SURFACE FILM AND STEEL CORROSION BEHAVIOR IN SIMULATED CONCRETE PORE SOLUTIONS

CHEN Wen, DU Ronggui, HU Ronggang, SHI Haiyan, ZHU Yanfeng, LIN Changjian

State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005

陈雯 杜荣归 胡融刚 时海燕 朱燕峰 林昌健. 模拟混凝土孔隙液中钢筋表面膜组成与腐蚀行为的关联[J]. 金属学报, 2011, 47(6): 735-742.
, , , , , . CORRELATION BETWEEN COMPOSITION OF REINFORCING STEEL SURFACE FILM AND STEEL CORROSION BEHAVIOR IN SIMULATED CONCRETE
PORE SOLUTIONS[J]. Acta Metall Sin, 2011, 47(6): 735-742.

摘要 参考文献 相关文章 Metrics 全文: PDF(565 KB)   摘要: 采用XPS分析钢筋经模拟混凝土孔隙液浸泡后表面膜的化学组成, 结合线性极化法和动电位扫描阳极极化曲线测试, 研究钢筋在模拟混凝土孔隙液中表面膜化学组成与腐蚀电化学行为的关联. 结果表明:钢筋在纯模拟液中处于钝化状态. 在含Cl-和不同pH值的模拟混凝土孔隙液中,随着Cl-浓度的增加和pH值的降低, 钢筋的腐蚀电位负移, 电流密度增大;钢筋表面钝化膜Fe2+的含量增加, Fe3+的含量减少.当模拟液中外加Cl-浓度达0.6 mol/L或pH值降至11.31时,钢筋表面不发生钝化, 但加入0.24 mol/L NaNO2缓蚀剂后又可使钢筋钝化从而抑制腐蚀. 关键词 ： 钢筋,  模拟混凝土孔隙液,  极化曲线,  Cl-     Abstract：It is well known that reinforcing steel in concrete can be protected from corrosion by forming a compact passive film on its surface in a concrete pore solution with high alkalinity. The corrosion behavior of the steel is related to its passivation and depassivation. The pH value and the Cl− concentration in a concrete pore solution are of the most important parameters affecting the passivity of reinforcing steel in concrete. In the present work, XPS analysis, linear polarization and potentiodynamic anodic polarization tests were used to study the relationship between the electrochemical corrosion behavior of reinforcing steel immersed in a simulated concrete pore solution and the chemical composition of the steel surface film. The results showed ht with the increase of the Cl− concentration or the decrease of the pH value in the solution, the corrosion potential of the steel shifted negatively and its corrosion current density rose, and the Fe2+ content of the steel surface film increased and the Fe3+ content decreased. The steel was in an active state in the solution with Cl− concentration higher than 0.6 mol/L or pH lower than 11.31, and the addition of 0.24 mol/L NaNO2 to the solution could protect steel from corrosion. Key words： reinforcing steel    simulated concrete pore solution    polarization curve    Cl− 收稿日期: 2011-01-24      ZTFLH:  O646   基金资助: 国家自然科学基金项目21073151, 国家自然科学基金重点项目50731004和国家高技术研究发展计划项目2009AA03Z327资助 作者简介: 陈雯, 女, 1984年生, 硕士生 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈雯 杜荣归 胡融刚 时海燕 朱燕峰 林昌健 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2011.00057      或      https://www.ams.org.cn/CN/Y2011/V47/I6/735 [1] Kumar V. Corros Rev, 1988; 16: 317 [2] Huet B, L’Hostis V, Miserque F, Idrissi H. Electrochim Acta, 2005; 51: 172 [3] Saremi M, Mahallati E. Cem Concr Res, 2002; 32: 1915 [4] Moreno M, Morris W, Alvarez M G, Duffo G S C. Corros Sci, 2004; 46: 2681 [5] Du R G, Hu R G, Huang R S, Lin C J. Anal Chem, 2006; 78: 3179 [6] Allahkaram S R, Khodayari M. Anti–Corros Method Mater, 2008; 55: 250 [7] Bentiss F, Traisnel M, Gengembre L, Lagrenee M. Appl Surf Sci, 1999; 152: 237 [8] Olsson C O A, Agarwal P, Frey M, Landolt D. Corros Sci, 2000; 42: 1197 [9] Hermas A A. 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