Corrosion product concentration in a single three-dimensional pit and the associated pitting dynamics

被引：13

作者：

Tian, Wenming ^{[1
]}

Chen, Fangfang ^{[1
]}

Li, Zhonglei ^{[1
]}

Pang, Guoxing ^{[1
]}

Meng, Yanbing ^{[2
]}

机构：

[1] North China Inst Aerosp Engn, Sch Mat Engn, 133 Aimindong Rd, Langfang 065000, Hebei, Peoples R China

[2] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100191, Peoples R China

来源：

CORROSION SCIENCE | 2020年 / 173卷

关键词：

Stainless steel; Potentiostatic polarization; Pitting; Kinetic parameters; Pit inner corrosion product concentration; STAINLESS-STEEL; CHLORIDE CONCENTRATION; LOCALIZED CORROSION; DISSOLUTION; GROWTH; PH; TEMPERATURE; CREVICE;

D O I：

10.1016/j.corsci.2020.108775

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A single three-dimensional pit was generated on one electrode at different polarization potentials, and its inner corrosion product concentration was evaluated by inductively coupled plasma emission spectrometry (ICP-OES) and three-dimensional microscope. The openness of pit increased with increasing pit volume and rising potential. The pit inner corrosion product concentration decreased with increasing pit volume and rising potential. Higher potentials resulted in a bigger pitting current density. Pit formed at higher potentials showed a lower pit inner corrosion product concentration and a faster growing rate, indicating that pit growth rate was mainly determined by applied potential rather than mass transfer process.

引用

页数：7

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