Characterization of Passive Film Formed on X80 Pipeline Steel in Sodium Bicarbonate Solution

被引：0
|
作者：
Liang, Ping [1 ]
Shi, Yanhua [1 ]
Zhang, Yunxia [2 ]
Hu, Chuanshun [1 ]
机构：
[1] Liaoning Shihua Univ, Sch Mech Engn, Fushun Liaoning 113001, Peoples R China
[2] Liaoning Shihua Univ, Continual Educ Inst, Fushun Liaoning 113001, Peoples R China
来源：
MATERIAL DESIGN, PROCESSING AND APPLICATIONS, PARTS 1-4 | 2013年 / 690-693卷
关键词：
X80 pipeline steel; Passive film; Corrosion resistance; STATE; BEHAVIOR; IRON;
D O I：
10.4028/www.scientific.net/AMR.690-693.101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The passive films formed on X80 and X70 pipeline steel in 0.5 mol.L-1NaHCO3 solution are investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), and the corrosion resistance of both steel is compared. The results show that X80 steel has a much lower passive current density than X70 steel. EIS measurements indicate that the film formed on X80 steel is much more compact and uniform than that of X70 steel. Mott-Schottky analysis demonstrates that the passive film of X80 steel has a lower donor density and a thicker space charge layer than X70 steel. These factors lead to a better corrosion resistance for X80 steel than X70 steel.
引用
收藏
页码：101 / +
页数：2
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