论文部分内容阅读
采用循环伏安方法研究了钢筋在两种常用电解液中再碱化过程中的电化学反应.考察了钢筋在两种不同溶液中的电极反应,分析了Li+离子和Ca2+离子对电极反应的影响.并针对上述过程,实验研究了钢筋电极在两种溶液中电极反应动力学.结果表明:由于Li+离子的存在,使得钢筋表面的单质铁与不同价态的铁氧化物或氢化合物之间的转化过程与饱和氢氧化钙溶液中转化过程不同;同时也发现,由于Ca2+离子的吸附作用,使得Fe3+离子的扩散系数低于在氢氧化锂溶液中的扩散系数.研究结果可为电化学再碱化技术的应用提供理论依据.
Cyclic voltammetry was used to study the electrochemical reaction of steel rebar in two common electrolytes. The electrode reactions of the steel bars in two different solutions were investigated. The effects of Li + and Ca2 + ions on the electrode reaction were analyzed .According to the above process, the reaction kinetics of the electrode in the two solutions was experimentally studied.The results show that due to the existence of Li + ions, the reaction between the elemental iron on the surface of the rebar and the iron oxide or hydrogen compound with different valence The conversion process is different from that of saturated calcium hydroxide solution. It is also found that the diffusion coefficient of Fe3 + ion is lower than that of lithium hydroxide solution due to the adsorption of Ca2 + ions. The application of technology to provide a theoretical basis.