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HO2-,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-.
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