Effects of chloride content on CO2 corrosion of carbon steel in simulated oil and gas well environments

被引：163

作者：

Liu, Q. Y. ^{[1
]}

Mao, L. J. ^{[1
]}

Zhou, S. W. ^{[2
]}

机构：

[1] SWPU, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China

[2] China Natl Offshore Oil Corp, Beijing 100000, Peoples R China

来源：

CORROSION SCIENCE | 2014年 / 84卷

基金：

中国国家自然科学基金;

关键词：

Carbon steel; SEM; Acid corrosion; DIOXIDE CORROSION; MILD-STEEL; ELECTRODISSOLUTION KINETICS; MECHANISTIC MODEL; PREDICTIVE MODEL; IRON ELECTRODES; SOLUBILITY; BEHAVIOR; SODIUM; OXYGEN;

D O I：

10.1016/j.corsci.2014.03.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of chloride content on CO2 corrosion of carbon steel have been studied by immersion tests and electrochemical measurements combined with scanning electron microscopy, X-ray diffraction and analysis of polarization curves. Results show that maximum CO2 corrosion rate is reached with increasing content at a constant temperature and partial pressure. CO2 corrosion is a mixed-controlled process, i.e., both activation and mass-transfer steps with increasing Cl- content. Increasing Cl- content can reduce CO2 solubility. Moreover, Cl- can destroy corrosion product films and change morphology of corrosion product films, but it has no effect on the composition of the corrosion product. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：165 / 171

页数：7

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