Effect of calcareous deposits on hydrogen permeation in X80 steel under cathodic protection

被引：29

作者：

Zhang, Lei ^{[1
]}

Shen, Hong-jie ^{[1
]}

Sun, Jun-yan ^{[2
]}

Sun, Yan-ni ^{[1
]}

Fang, Yi-Chen ^{[1
]}

Cao, Wen-hai ^{[3
]}

Xing, Yun-ying ^{[4
]}

Lu, Min-xu ^{[1
]}

机构：

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

[2] China Acad Journals CD Edit Elect Publishing Hous, Beijing 100192, Peoples R China

[3] CITIC Dicastal Co Ltd, Engn Technol Inst, Qinhuangdao 066000, Hebei, Peoples R China

[4] Safetech Res Inst, Beijing 100083, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 207卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Hydrogen permeation; Calcareous deposits; Cathodic current density; Calcium ion content; PIPELINE STEEL; ARTIFICIAL SEAWATER; MILD-STEEL; SEA-WATER; MICROSTRUCTURE; EMBRITTLEMENT; EVOLUTION; SURFACES; CRACKING; KINETICS;

D O I：

10.1016/j.matchemphys.2017.12.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of calcareous deposits in simulated soil environment on the hydrogen permeation of X80 steel was investigated using electrochemical hydrogen permeation technique in association with hydrogen content tests and cross-section analysis by scanning electron microscopy (SEM). A raising trend of hydrogen permeability with the formation of calcium hydroxide deposits on X80 steel surface was obtained. This can be attributed to many factors, such as the cathodic current density significantly contributed to increase in hydrogen permeation, while the excessive cathodic current density was likely to break the integrity of the calcareous layer. Furthermore, the hydrogen content and thickness of calcareous deposits increased with respect to the charging current density and hydrogen charging duration, which were in accordance with the change trend of hydrogen permeation in presence of calcium hydroxide deposits. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：123 / 129

页数：7

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