用动电位扫描法研究了有无外磁场时纯铁在Ｆｅ２（ＳＯ４）和Ｈ２ＳＯ４＋Ｆｅ２（ＳＯ４）３溶液中的阴极极化曲线。没有外加磁场时，Ｆｅ（３＋）还原反应与Ｈ＋去极化反应有相互促进作用。在单纯Ｈ２ＳＯ４溶液或单纯Ｆｅ２（ＳＯ４）３溶液中，外加０．４Ｔ磁场均加速铁的阴极过程，但不改变反应进行的机制；在Ｈ２ＳＯ４＋Ｆｅ２（ＳＯ４）３溶液中磁场对铁阴极过程的加速作用是磁场对Ｆｅ（３＋）还原和对氢离子去极化反应作用的综合结果。以外加磁场引起传质过程变化及电极—溶液界面双电层结构改变的观点解释了磁场的作用。
Cathodic processes of iron in Fe2（SO4）3 and H2SO4＋Fe2（SO4）3 solutions were studied in the presence of 0．4T（tesla）magnetic field at 20℃．It was found that Fe3+ reduction and H+ depolarization accelerated each other in the absence of magnetic field．Magnetic field accelerated the cathodic process of iron corrosion in Fe2（SO4）3 solution or in 0．5 mol／L H2SO4 solution but did not cnange the reaction mechanism.In 0．5 mol／L H2SO4+Fe2（SO4）3 solution a combined effect of magnetic field on Fe3+ reduction and H+ depolarization reaction was observed．The results were explained on the point of view that magnetic field changed the mass transfer process and the structure of electric double layer at the electrode-solution interface．
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