钢筋钝化膜在含缓蚀剂的模拟混凝土孔隙液中的电化学特性

功能材料, 2008, 39(5): 764-766.

钢筋钝化膜在含缓蚀剂的模拟混凝土孔隙液中的电化学特性

吴群 ^1, , 陈雯 ^2, , 杜荣归 ^3, , 孙岚 ^4, , 林昌健 ^5,

1.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

2.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

3.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

4.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

5.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

基金项目: 国家自然科学基金(20473066) 福建省自然科学基金(E0210006) 国家重点基础研究发展计划(973计划)(2005CCA06700)

关键词：钢筋 , 钝化膜 , 模拟混凝土孔隙液 , 复合缓蚀剂 , 电化学技术

Study on the electrochemical characteristics of passive film on reinforcing steel in simulated concrete pore solutions with composite inhibitors

应用线性极化法、Mott-Schottky曲线研究了钢筋钝化膜在含有亚硝酸钠和D-葡萄糖酸钠复合缓蚀剂的模拟混凝土孔隙液中的电化学特性.结果表明,复合缓蚀剂的加入,使钢筋在含有氯离子的模拟混凝土孔隙液中耐蚀性提高;在外加亚硝酸钠的模拟混凝土孔隙液中,钢筋钝化膜在一定的电位区间内呈现n型半导体特性并具有单一施主浓度,而D-葡萄糖酸钠加入则增大了施主浓度.此外,钢筋钝化膜的耐蚀性和半导体性质受溶液中氯离子浓度的影响较大,加入一定浓度的氯离子可使钝化膜的施主浓度增大,耐蚀性降低.

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