在[H_2SO_4]为0.1～2mol/L,[K_2Cr_2O_7]为0.01～0.4mol/L的范围内,研究了Fe/H_2SO_4+K_2Cr_2O_7系统的电化学状态和阴极极化行为,讨论了[H_2SO_4]、[K_2Cr_2O_7]和[H_2SO_4]/[K_2Cr_2O_7]比值与Fe的电化学状态的关系。分析了所出现的五种类型阴极极化曲线和外磁场对阴极过程的影响。
The electrochemical states and cathodic polarization behavior of Fe/xH2SO4+y/K2Cr2O7 systems (x=0.1- 2 mol/L, y/=0.01-0.4 mol/L) were investigated. The electrochemical states of iron in relation to [H2SO4], [K2Cr2O7] and [H2SO4]/[K2Cr2O7] ratio were established, including active state, passive state and metastable state. Five types of cathodic polarization curve were analysed and the effect of magnetic field (0.4T) on the cathodic process was discussed.
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