| 摘要: |
| 应用腐蚀电位、腐蚀电流密度和交流阻抗谱，研究了碳纳米管（CNT）碳纤维（CF）水泥基材料铺覆层作为辅助阳极对混凝土中钢筋的阴极保护效果.结果表明：所施加的电流能引起钢筋电位足够的负移，从而有效地保护钢筋.与碳纤维水泥基材料相比，采用CNT CF水泥基材料作为辅助阳极来实施阴极保护的钢筋试样腐蚀电流密度更小，保护效果更佳.随着龄期的增长，在实施阴极保护钢筋试样的Nyquist图中，中频区容抗弧半径增大，电荷转移电阻增大.采用CNT CF水泥基材料铺覆层作为辅助阳极对混凝土中钢筋的阴极保护具有显著的增强效果. |
| 关键词: 碳纳米管碳纤维水泥基材料 阳极 钢筋混凝土 阴极保护 |
| DOI：103969/j.issn1007 9629201603002 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51508320；50978200）；“十二五”国家科技支撑计划项目（2014BAJ03B02）；上海市青年科技启明星计划资助项目（16QB1402000）；先进土木工程材料教育部重点实验室（同济大学）开放基金资助项目（201503）；上海市科学技术委员会项目（14DZ2252100） |
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| Effect of CNT CF Cement Based Materials Auxiliary Anode on Cathodic Protection of Reinforced Concrete |
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ZUO Junqing1, YAO Wu2
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1.Shanghai Construction Group Co., Ltd., Shanghai 200080, China;2.Key Laboratory of Advanced CivilEngineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
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| Abstract: |
| Corrosion potential, corrosion current density and AC impedance spectroscopy were applied to study the efficiency of cathodic protection to steel in concrete structures with carbon nanotube carbon fiber(CNT CF) cement based materials overlay auxiliary anodes. Test results show that the applied electric current could cause enough negative potential shift and provide effective protection to steel. Compared to carbon fiber cement based materials, corrosion current density of cathodic protection specimens with CNT CF cement based materials overlay as auxiliary anodes is smaller and the protective effect is better. The capacitive loop diameter of Nyquist figure in the intermediate frequency region and the charge transfer resistance of specimen under cathodic protection both increase. Using CNT CF cement based materials overlay as auxiliary anodes has a prominent effect on cathodic protection of steel in concrete structures. |
| Key words: carbon nanotube carbon fiber(CNT CF) cement based material anode reinforced concrete cathodic protection |
