IRON DISSOLUTION UNDER MASS-TRANSPORT CONTROL - THE EFFECT OF VISCOSITY ON THE CURRENT OSCILLATION

被引:24
作者
FERREIRA, JRRM
BARCIA, OE
MATTOS, OR
TRIBOLLET, B
机构
[1] UFRJ,COPPE,PEMM,CORROSAO PROF MANOEL DE CASTRO LAB,CAIXA POSTAL 68505,BR-21945 RIO JANEIRO,BRAZIL
[2] UFRJ,DEPT FISICOQUIM IQ,RIO JANEIRO,BRAZIL
[3] CNRS,UPR15,F-75252 PARIS 05,FRANCE
关键词
IRON DISSOLUTION; MASS TRANSPORT; ELECTROHYDRODYNAMIC IMPEDANCE; VISCOSITY PROFILE; CURRENT OSCILLATION;
D O I
10.1016/0013-4686(94)85108-5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The current oscillation normally seen at the beginning of the plateau of polarization curves was found to be influenced strongly by the solution viscosity. The role of viscosity for iron dissolution in sulphate solution was studied by polarization curves, ac and electrohydrodynamical impedances. It was found that the charge and mass transport processes are not changed by the viscosity. However, when the glycerol was added to electrolyte the viscosity of the solution changes. So, the hydrodynamic conditions at the electrode surface. also change and consequently the oscillation processes can be eliminated.
引用
收藏
页码:933 / 938
页数:6
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