采用电化学测量方法研究 了磁场对铜在含三价铁离子硫酸溶液中自腐蚀以及阴极极化行为的作用.磁场不影响该体系 的自腐蚀状态.磁场加速铜电极上三价铁离子的阴极扩散过程，随磁场强度增大，阴极极限 扩散电流密度增大；磁场强度恒定时，磁场对三价铁离子阴极扩散的作用系数随三价铁离子 浓度增加而增大；引起极限扩散电流密度明显增加的临界磁场强度随三价铁离子浓度增加而 减小.由于铜与铁在含有三价铁离子的水溶液中的热力学稳定性不同，不同的自腐蚀电位下 阴极反应的控制步骤类型不同而导致磁场作用不同.
The effects of magnetic field on open circuit state and cathodic polarization behavior of copper in sulfuric acid with ferric ion w ere studied by open circuit potential measurement，polarization curve measuremen t and potentiostatic polarization measurement.Magnetic field did not affect open circuit state for Cu/H2SO4+Fe3+ systems.Magnetic field enhanced the c athodic diffusion of Fe3+ on copper electrode，and cathodic limiting diff usion current density increased with magnetic field intensity.Magnetic field eff ect coefficients for the same magnetic field intensity increased with ferric ion concentration. The minimum magnetic field intensity needed to induce significan t effect on cathodic limiting diffusion current density decreased with increasin g ferric ion concentration.It was pointed out that different thermodynamic stabi lity of Cu and Fe in solution with ferric ion led to different rate controlling steps for cathodic reaction at open circuit potential，thus magnetic field had d ifferent effects.Fit results for the relation between the magnetic field effect coefficient and magnetic field intensity and concentration of ferric ion showed that，more than one correlating equations could be obtained for the same set of experimental data.Intensive research on mechanism is needed to clarify the exact dynamic expression.
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