磁场和缓蚀剂对Fe/0.5mol·L^(-1)H_2SO_4等体系极化行为的影响

THE EFFECT OF MAGNETIC FIELD AND INHIBITOR ON POLARIZATION BEHAVIOR OF Fe/0.5mol· L^(-1) H_2SO_4 SYSTEMS

测定了Fe/H_2SO_4,Fe/H_2SO_4+Na_2SO_4,Fe/H_2SO_4+Fe_2(SO_4)_3和Fe/H_2SO_4+NaCI四种体系在磁场或/和缓蚀剂作用下的极化曲线,指出腐蚀的主要控制是阴极过程,H_2SO_4中加入少量Na_2SO_4不影响其结果,但加入Fe_2(SO_4)_3,NaCI会因Fe^(3+),CI^-的作用而影响结果。分析了磁场,缓蚀剂、CI^-和Fe^(3+)单一和联合对Fe/H_2SO_4阴极和阳极极化行为的影响,提出在磁场和缓蚀剂作用下上述四种体系阴极析氢总电流密度的表达式。

Polarization curves of Fe/H2SO4, Fe/H2SO4+Na2SO4, Fe/H2SO4+Fe2(SO4)3 and Fe/H2SO4+NaCl systems in the presence of magnetic field or/and inhibitor were measured. Experiments showed that the predominant control of corrosion was the cathodic process and the polarization curves of Fe/H2SO4+Na2SO4 system were nearly the same as those of Fe/H2SO4 system. The individual and combined effects of magnetic field, inhibitor, Cl- and Fe3+ on the cathodic and anodic polarization behavior of Fe/H2SO4 systems were investigated. Formulae for overall current density of hydrogen evolution at cathode of abovementioned systems in the presence of magnetic field and inhibitor were suggested.