Corrosion Behavior and Mechanism of Alloy Steel Submitted to Chloride and Sulfate

被引：0
作者：
Yuan, Junxiang [1 ]
Liu, Guojian [1 ]
Liu, Zhiyong [2 ]
She, Wei [2 ]
Zhang, Yunsheng [2 ,3 ]
机构：
[1] School of Civil Engineering, Suzhou University of Science and Technology, Jiangsu, Suzhou
[2] School of Materials Science and Engineering, Southeast University, Nanjing
[3] School of Civil Engineering, Lanzhou University of Technology, Lanzhou
来源：
Cailiao Daobao/Materials Reports | 2025年 / 39卷 / 08期
关键词：
Alloy steel; Chloride; Composite corrosive ions; Corrosion; Sulfate;
D O I：
10.11896/cldb.24030019
中图分类号：
学科分类号：
摘要：
The corrosion behavior of pre-passivated alloy steel in a saturated Ca(OH)2 simulated concrete pore solution was analyzed under the action of chlorides and sulfates through corrosion potential, linear polarization resistance, corrosion current density, and electrochemical impedance spectroscopy. By leveraging the Pourbaix diagram of the Fe-Cr-H2O alloy system, the action mechanisms of two ions in the corrosion process was investigated. Results showed that the corrosion rate of steel was the highest with chlorides only, and the lowest with sulfates only, and intermediate with both ions. Finally, based on theoretical analysis, a reaction mechanism model of the competitive adsorption and catalysis of corrosion by chlorides and sulfates in lalloy steel corrosion was proposed. © 2025 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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