Investigation on localized corrosion behavior of pipeline steel under AC interference in alkaline earth metal environment using wire beam electrode

被引：0
|
作者：
Chen, Le [1 ]
Du, Yanxia [1 ]
Liu, Yang [1 ]
Zhu, Zhenhong [1 ]
Liang, Yi [1 ]
Zhang, Lei [1 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2024年 / 973卷
关键词：
AC corrosion; Localized corrosion; Wire beam electrode; Calcareous deposit; Chloride; CARBON-STEEL; CALCAREOUS DEPOSITS; ALTERNATING-CURRENT; CALCIUM-CARBONATE; MILD-STEEL; CHLORIDE; CACO3; RATES; PH;
D O I：
10.1016/j.jelechem.2024.118668
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The localized corrosion behavior of X65 steel under AC interference in alkaline earth metal environment was investigated using the detachable wire beam electrode (WBE). The AC/DC current distribution, electrochemical properties, and elemental distribution were traced through the WBE to characterize the localized corrosion behavior and mechanism. The results show that hydrogen evolution under high cathodic protection (CP) conditions leads to an uneven distribution of calcareous deposits, and areas not covered by calcareous deposits have higher JAC and Cl concentrations. The synergistic effect of Fe3O4 dissolution reprecipitation process, hydrogen evolution and Cl leads to severe localized corrosion.
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页数：16
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