Corrosion and SCC initiation behavior of low-alloy high-strength steels microalloyed with Nb and Sb in a simulated polluted marine atmosphere

被引：39

作者：

Wu, Wei ^{[1
]}

Wang, Qiuyu ^{[1
]}

Yang, Liu ^{[1
]}

Liu, Zhiyong ^{[1
,2
]}

Li, Xiaogang ^{[1
,2
]}

Li, Yong ^{[1
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[3] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2020年 / 9卷 / 06期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Low-alloy high-strength steel; Microalloying; Stress corrosion cracking; Atmospheric corrosion; Corrosion resistance; Marine environment; ADVANCED WEATHERING STEEL; HYDROGEN EMBRITTLEMENT; ANODIC-DISSOLUTION; PITTING CORROSION; PIPELINE STEELS; CARBON-STEEL; E690; STEEL; GRAIN-SIZE; STRESS; CRACKING;

D O I：

10.1016/j.jmrt.2020.09.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion and stress corrosion cracking (SCC) behavior of some low-alloy high-strength steels microalloyed with Nb and Sb were in detail studied in a simulated polluted marine atmosphere. The results indicated that the high-strength steel without Nb and Sb was badly damaged by corrosion and very susceptive to SCC in a SO2-containing marine atmosphere, which was characterized by high corrosion rate and a large number of potential initiation sites for SCC cracks. By contrast, Nb addition affected little on atmospheric corrosion rate, but weakened the role of hydrogen at the boundaries of prior austenite grain and lath bainite. Sb addition significantly reduced the corrosion rate by optimizing the properties of rust layer through its synergy with Cu, and inhibited the localized anodic dissolution and acidification effect underneath. Thus, the combined addition of Nb and Sb increased the resistance to atmospheric corrosion and substantially inhibited SCC initiation. (C) 2020 The Author(s). Published by Elsevier B.V.

引用

页码：12976 / 12995

页数：20

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