Insight into into atmospheric pitting corrosion of carbon steel via a dual-beam FIB/SEM system associated with high-resolution TEM

被引：43

作者：

Wan, Ye ^{[1
,4
]}

Tan, Jun ^{[2
]}

Zhu, Siteng ^{[3
]}

Cui, Jingping ^{[2
]}

Zhang, Ke ^{[4
]}

Wang, Xiumei ^{[1
]}

Shen, Xuanyu ^{[1
]}

Li, Yanbo ^{[1
]}

Zhu, Xu ^{[1
]}

机构：

[1] Shenyang Jianzhu Univ, Sch Mat Sci & Engn, Shenyang 110168, Liaoning, Peoples R China

[2] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[3] Shenyang Ligong Univ, Sch Automat & Elect Engn, Shenyang 110159, Liaoning, Peoples R China

[4] Shenyang Jianzhu Univ, Joint Int Res Lab Modern Construct Engn Equipment, Shenyang 110168, Liaoning, Peoples R China

来源：

CORROSION SCIENCE | 2019年 / 152卷

基金：

中国国家自然科学基金;

关键词：

Carbon steel; FIB/SEM; TEM; Pitting corrosion; Marine atmosphere; Chemical evaluation; Structural evaluation; Pitting mechanism; STAINLESS-STEEL; INITIATION; SIZE; MARINE; MODEL; PITS;

D O I：

10.1016/j.corsci.2019.03.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon steel experiences serious pitting corrosion in the atmospheres containing chloride ions. The present research is focused on revealing a three-dimensional chemical and microstructural insight into pitting corrosion with high spatial resolution nano-tomography by addressing 1018 carbon steel after exposed in the marine atmosphere. A well-defined core-shell structure for pitting corrosion products was revealed by using a combination of dual-beam focused ion beam system with scanning electron microscope (FIB/SEM) and high-resolution transmission electron microscope (HRTEM). The core is made of ferric chloride and the shell is constituted with iron oxides. Pitting corrosion is a self-catalytic process and the corrosion products grow to be porous flower-type structures. The porosity in the core provides a diffusion path for the ions. Inclusions promote pitting corrosion growth.

引用

页码：226 / 233

页数：8

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