通过用循环伏安和旋转圆盘电极伏安等电化学方法研究了Q235钢在模拟海水环境下的混凝土孔隙液中阴极氧还原反应行为及动力学参数.结果表明：在0.02 mol/L Ca(OH)2溶液中氧还原反应在阴极反应电位范围内，最初为混合过程控制的二电子反应即O2还原为HO-2，电位较负时为扩散过程控制的四电子反应，反应的最终产物为OH-.0.02 mol/L Ca(OH)2+3.5% NaCl溶液中氧还原反应半波电位与无氯离子溶液体系相比发生正移，氧还原反应以四电子反应为主，反应的最终产物为OH-.
Cyclic voltammetry and rotating disk electrode voltammetry were used to study the kinetics process of cathodic oxygen reduction reaction(ORR)on Q235 steel in an artificial solution simulated concrete pore liquor in seawater environment.The results show that the ORR in 0.02 mol/L Ca(OH)2 solution was a twoelectron reaction companying with that O2 reduced to HO-2, which was controlled by a mixed process of charge transfer and mass transport,at the potentials of the beginning of ORR.Thereafter it was a fourelectron reaction controlled by mass transport process,therewith O2 reduced to OH- at the much negative potentials.The half-wave potential of the ORR in 0.02 mol/L Ca(OH)2+3.5% NaCl solution was much positive than that in 0.
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