模拟混凝土孔隙液中D-葡萄糖酸钠复合缓蚀剂对-IngentaConnect.pdf

物理化学学报(Wuli Huaxue Xuebao) August Acta Phys. -Chim. Sin . 2012, 28 (8), 1923-1928 1923 [Article] doi: 10.3866/PKU.WHXB201205292 模拟混凝土孔隙液中D-葡萄糖酸钠复合缓蚀剂对钢筋的阻锈作用 杨榕杰 郭 亚 唐方苗 王小平 杜荣归* 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, 福建厦门361005) 摘要: 应用电化学技术, 结合扫描电子显微镜(SEM)观测, 研究D-葡萄糖酸钠、钼酸钠和硫脲三组分复合缓蚀 剂对模拟混凝土孔隙液中钢筋腐蚀行为的影响及其阻锈作用. 结果表明: 在含3.5% (w) NaCl 的模拟混凝土孔 隙液中, 复合缓蚀剂具有协同效应, 对钢筋有良好的阻锈作用. 当D-葡萄糖酸钠、钼酸钠和硫脲浓度分别为 750、250 和500 mg ·L-1 时, 对钢筋的缓蚀效率可达到94.5%. 应用软硬酸碱(HSAB)理论分析缓蚀机理, 可认为 三组分复合缓蚀剂在钢筋表面共同形成保护膜而阻止钢筋的腐蚀. 关键词: 钢筋; 模拟混凝土孔隙液; 复合缓蚀剂; 电化学技术; 软硬酸碱理论 中图分类号: O646; TG 174 Effect of Sodium D-Gluconate-Based Inhibitor in Preventing Corrosion of Reinforcing Steel in Simulated Concrete Pore Solutions YANG Rong-Jie GUO Ya TANG Fang-Miao WANG Xiao-Ping DU Rong-Gui* LIN Chang-Jian (State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China) Abstract: The corrosion behavior of reinforcing steel in simulated concrete pore solutions with and without corrosion inhibitors was studied by electrochemical techniques and scanning electron microscopy (SEM). A combined inhibitive effect of sodium D-gluconate, Na MoO and thiourea on restraining the 2 4 corrosion of reinforcing steel immersed in the solution was observed. This result showed that there was a synergetic effect among the three age