Research on AC corrosion behavior and corrosion product film evolution of X70 steel under the combined action of AC interference and CP

被引：30
作者：
Liang, Yi [1 ]
Du, Yanxia [1 ]
Tang, Dezhi [2 ]
Chen, Le [1 ]
Zhang, Lei [1 ]
Qiao, Lijie [1 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing 100083, Peoples R China
[2] PetroChina Planning & Engn Inst, Beijing 100000, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 197卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
AC corrosion behavior; Corrosion products film evolution; AC corrosion process; Cathodic protection; AC interference; CATHODICALLY PROTECTED PIPELINES; RAY PHOTOELECTRON-SPECTROSCOPY; ALTERNATING-CURRENT CORROSION; HYDROGEN ENTRY; IRON SURFACE; OXIDE-FILMS; ACTIVATION;
D O I：
10.1016/j.corsci.2022.110085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion behavior and corrosion product film evolution under AC interference and CP were investigated by corrosion tests. High CP AC corrosion could be identified according to corrosion rate map. In case of high CP AC corrosion, corrosion products gradually grew into compete film to provide protection, and subsequently it was destroyed and re-built during two successive stages in cyclic pattern. This pattern was tentatively attributed to the interplay of destructive action of cathodic reaction processes and AC electric field upon protective film, together with constructive action of anodic reaction processes leading to recovery of protective film upon bare metallic surface.
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页数：13
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