Time-lapse observation of pitting corrosion in ferritic stainless steel under bipolar electrochemistry control

被引：21

作者：

Zhou, Yiqi ^{[1
]}

Engelberg, Dirk Lars ^{[1
,2
]}

机构：

[1] Univ Manchester, Dept Mat, Ctr Corros & Protect, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Dalton Nucl Inst, Mat Performance Ctr, Manchester M13 9PL, Lancs, England

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2021年 / 899卷 / 899期

关键词：

Bipolar electrochemistry; Pitting corrosion; Pit growth kinetics; Stainless steel; LOCALIZED CORROSION; GALVANOSTATIC POLARIZATION; CREVICE CORROSION; REPASSIVATION; MODEL;

D O I：

10.1016/j.jelechem.2021.115599

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A bipolar electrochemistry approach has been applied to characterise pit nucleation and growth kinetics in 13% Cr ferritic stainless steel. In-situ time-lapse imaging, supported by laser confocal microscopy measurements, were applied to obtain pit nucleation frequencies and associated pit growth characteristics. The development of champion pits is observed, and the effect of pit shape and aspect ratio on pit nucleation and growth are discussed. Pits preferentially nucleated and grew with depth to width aspect ratios of 0.4-0.6. The observed pit growth kinetics are independent of pit volume and the acting potentials.

引用

页数：7

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