Effect of grain size on pitting corrosion of 304L austenitic stainless steel

被引：204

作者：

Aghuy, A. Abbasi ^{[1
]}

Zakeri, M. ^{[1
]}

Moayed, M. H. ^{[1
]}

Mazinani, M. ^{[1
]}

机构：

[1] Ferdowsi Univ Mashhad, Met & Mat Engn Dept, Fac Engn, Mashhad 917751111, Iran

来源：

CORROSION SCIENCE | 2015年 / 94卷

关键词：

Stainless steel; Polarisation; Pitting corrosion; BEHAVIOR; MICROSTRUCTURE; NUCLEATION; INCLUSIONS; INITIATION; GROWTH; PITS;

D O I：

10.1016/j.corsci.2015.02.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of grain size on pitting corrosion of 304L stainless steel in 3.5 wt.% NaCl solution was investigated by electrochemical methods employing the statistical approach. The potentiodynamic results revealed that grain refinement has no effect on the pitting potential. To understand the reason of ineffectiveness of grain size on pitting potential of 304L stainless steel, potentiostatic tests were conducted. Evaluation of current transients observed in potentiostatic tests revealed that the frequency of metastable pit initiation decreases with grain refinement. However, grain size reduction increases the kinetics of metastable pits dissolution and the probability of transition from metastable pitting to stability. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：368 / 376

页数：9

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