Effect of dissolved oxygen on corrosion behavior and mechanism of X70 pipeline steel in simulated low temperature bentonite-containing alkaline chloride environment

被引：4
|
作者：
Yang, Guangming [1 ,2 ]
Xu, Chengwei [3 ]
Zhang, Jingchen [4 ]
Liu, Chao [1 ,2 ]
Cui, Huaiyun [1 ,2 ]
Zeng, Lulu [1 ,2 ]
Liu, Zhiyong [1 ,2 ]
Du, Cuiwei [1 ,2 ]
Li, Xiaogang [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Key Lab Corros & Protect MOE, Beijing 100083, Peoples R China
[2] Natl Mat Corros & Protect Sci Data Ctr, Beijing 100083, Peoples R China
[3] Branch Sci & Technol Res Inst Natl Oil & Gas Pipel, Corros & Control Res Ctr, Tianjin 300457, Peoples R China
[4] Jilin Prov Prod Qual Supervis & Inspect Inst, Changchun 130000, Jilin, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2024年 / 438卷
基金：
中国国家自然科学基金;
关键词：
Dissolved oxygen; X70 pipeline steel; Alkaline chloride environment; Pitting; Corrosion products film; UNDERSTANDING ATMOSPHERIC CORROSION; DUPLEX STAINLESS-STEEL; LOW-CARBON STEEL; LOW-ALLOY STEEL; PITTING CORROSION; WEATHERING STEEL; CRACKING; INCLUSIONS; INITIATION; IRON;
D O I：
10.1016/j.conbuildmat.2024.137170
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Effect of dissolved oxygen (DO) on the corrosion behavior of X70 pipeline steel in low temperature bentonitecontaining alkaline chloride environments was comprehensively investigated. The cathodic reduction reaction is inhibited and corrosion current density gradually descent as the DO decreases, resulting in a significant improvement in the corrosion resistance of X70 pipeline steel. The content of Fe3O4 and alpha-FeOOH in the corrosion products film increases, refinement of rust grains and crack decreases effectively suppressing the penetration of corrosive substances. Pitting initiates within ferrite grains and at phase interface, while reducing the DO can restrain the chemical dissolution of MnS to retard the pit initiation.
引用
收藏
页数：14
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