The study on the influence of aluminum on the CO2 corrosion resistance of 3%Cr steel

被引：6
作者：
Gao, Zhenhuan [1 ]
Liu, Yongxuan [1 ]
Wang, Chong [1 ]
Yang, Huisheng [2 ]
Xu, Lining [1 ]
Qiao, Lijie [1 ]
机构：
[1] Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing, Peoples R China
[2] Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Sch Mat Sci & Engn, Beijing, Peoples R China
来源：
ANTI-CORROSION METHODS AND MATERIALS | 2022年 / 69卷 / 02期
关键词：
Aluminum; 3Cr2Al steel; CO2; O-2 coexistence environment; Pre-passivation; 3CR STEEL; CARBON-DIOXIDE; TEMPERATURE; CHROMIUM; OIL;
D O I：
10.1108/ACMM-11-2021-2565
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Purpose This study aims to report the CO2 corrosion performance of 3Cr steel and 3Cr2Al steel and reveal the role of aluminum in mitigating corrosion of low-Cr steel. Design/methodology/approach Aluminum was added to 3Cr steel to prepare a new type of 3Cr2Al steel, and the effect of aluminum on the corrosion resistance of pipeline steel was studied using morphology observation and composition analysis, weight loss tests and electrochemical test. Findings In the CO2/O-2 coexistence environment, the average corrosion rate of the 3Cr2Al steel was obviously lower than that of the 3Cr steel. The addition of aluminum expanded the range of prepassivation, and the dynamic potential polarization curve of 3Cr2Al steel showed duplex prepassivation phenomena. 3Cr steel underwent severe local corrosion, and 3Cr2Al steel underwent uniform corrosion. The addition of aluminum contributed to the formation of a dense corrosion product layer and greatly reduced the localized corrosion sensitivity. Originality/value The studies on CO2 corrosion of aluminum containing low-Cr steel are quite rare. This study clarifies the role of aluminum by comparing the corrosion behavior of 3Cr2Al and 3Cr steel. The effect of aluminum on the growth of corrosion product film was discussed, and the duplex prepassivation phenomena of Cr and Al were revealed.
引用
收藏
页码：177 / 182
页数：6
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