电化学频率调制技术在混凝土钢筋锈蚀中的应用

Research on Reinforcement Corrosion in Concrete by Using Electrochemical Frequency Modulation Technology

为获取更为真实的钢筋锈蚀动力学参数，运用电化学频率调制技术对混凝土中锈蚀钢筋进行了测试；通过与单向极化三点法测试结果对比，明确了电化学频率调制技术的测试参数；结果表明，混凝土中锈蚀钢筋鼠范围在65-250mV／dec，大于溶液中的30～120mV／dec；对EFM测试得到的极化电阻岛和腐蚀电流k进行曲线拟合分析，得到两者之间经验关系，修正了线性极化法B值。

Reinforcement corrosion is a hot issue of the durability of concrete structures. In order to obtain more realistic reinforced corrosion kinetic parameters, Electrochemical Frequency Modulation technology was used in reinforced corrosion test. Compared with three-point method（one-way polarization） test results, test parameters of the Electrochemical Frequency Modulation tech- nique was determined. The results showed that, for reinforced corrosion in concrete, Ba was in the range of 65 - 250 mV/dec, lager than the value 30-120 mV/dec in solution. The polarization resis- tance Rp and the corrosion current Lo, obtained by Electrochemical Frequency Modulation test was analyzed to amend the B value of the linear polarization method.