钢筋混凝土的银电极阳极氧化除氯

Removal of Chloride in Reinforced Concrete by Anodic Oxidation of Silver Plate

关键词:  钢筋混凝土  阳极  除氯  电阻  电容  扩散阻抗系数

Key words:  reinforced concrete  anodic  removal of chloride  electric resistance  capacitance  diffusion impedance coefficient

摘要:

混凝土孔溶液中存在的超临界氯离子含量的氯化物会加速混凝土中钢筋的锈蚀，为此提出了银电极阳极氧化除氯方法.结果表明，经过银电极阳极氧化除氯后，混凝土孔溶液中氯离子含量降低，钢筋极化电阻(Rp)提高，混凝土电阻(Rc)、钢筋钝化膜电阻(Rf)、钢筋钝化膜电容(Cf)及钢筋混凝土扩散阻抗系数(σ)得到改善，有效地提高了混凝土中钢筋的抗锈蚀性能.

Abstract:

A method to remove chloride in reinforced concrete was proposed by anodic oxidation of silver plate in the pore solution with chloride content over critical value. The result shows that after anodic oxidation of silver plate the chloride concen in pore solution is reduced, the polarization resistance of rebar is improved to the range of safety, the electric resistance of concrete, the electric resistance and capacitance of passive film on the surface of rebar and the diffusion impedance coefficient of reinforced concrete are improved with the result that the performance of anti corrosion of rebar in concrete is improved.The silver plate can be used repeatedly.