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

页码：101 / +

页数：2

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