Influence of nanocrystallization on pitting corrosion behavior of an austenitic stainless steel by stochastic approach and in situ AFM analysis

被引：44
|
作者：
Liu, Li [1 ]
Li, Ying [1 ]
Wang, Fuhui [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2010年 / 55卷 / 07期
关键词：
Stainless steel; Grain size; In situ AFM; Stochastic theory; NI-BASED SUPERALLOY; PIT INITIATION;
D O I：
10.1016/j.electacta.2009.11.088
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The pitting corrosion behavior of an austenitic stainless steel nanocrystalline (NC) coating, fabricated by magnetron sputtering as well as that of the conventional polycrystalline (PC) alloy have been investigated in 3.5% NaCl solution by stochastic approach and in situ atomic force microscopy (AFM). The results indicate that the pitting corrosion resistance of the NC coating was much higher than that of the PC alloy with higher prevalence of metastable pits and lower rates of stable pit nucleation and growth. The influence of nanocrystallization on the pit initiation and pit growth processes has been discussed according to the in situ AFM observations. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2430 / 2436
页数：7
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