INDUCTION TIME AND REACTIVATION OF PASSIVE FILMS ON IRON

被引：4

作者：

CAKIR, A

机构：

[1] Dokuz Eylul Univ, Boronova, Turk, Dokuz Eylul Univ, Boronova, Turk

来源：

ELECTROCHIMICA ACTA | 1985年 / 30卷 / 04期

关键词：

ELECTROCHEMISTRY;

D O I：

10.1016/0013-4686(85)80046-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effect of Cl** minus and F** minus additions on the reactivation of a passive iron has been studied in acid-SO//4 and alkaline-borate solutions. Cathodic reduction curves were also studied in the alkaline solution by investigating the combined effect of heat treatment and the scanning rate. The variables effecting the cathodic reduction curves were reviewed with particular attention to the second potential arrest. The results of halide additions showed that there was an induction time ( tau ) before film breakdown only in the acid-SO//4 solutions with Cl** minus concentration greater than 8. 46 multiplied by 10** minus **4 M. This explained by the pore plugging mechanism promoted by FeSO//4 precipitation blocking the incipient pits within the passive film faults.

引用

页码：551 / 557

页数：7

共 40 条

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[2]

BRITTON SC, 1930, J CHEM SOC, V233, P1773

[3]

CAKIR A, 1978, PASSIVITY METALS, P385

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