Effect of Ca2+ on CO2 corrosion properties of X65 pipeline steel

被引：0

作者：

Ding, Chen ^{[1
]}

Gao, Ke-wei ^{[1
]}

Chen, Chang-feng ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China

[2] China Univ Petr, Dept Mat, Beijing 100083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2009年 / 16卷 / 06期

基金：

中国国家自然科学基金;

关键词：

CO2; corrosion; pipeline steel; stratum water; Ca2+ concentration; complex carbonate; PITTING CORROSION; NACL BRINE; N80; STEEL; SCALES; IRON;

D O I：

10.1016/S1674-4799(10)60009-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Ca2+ on CO2 corrosion to X65 pipeline steel was investigated in the simulated stratum water of an oil field containing different concentrations of Ca2+. It is found that Ca2+ can enhance the corrosion rate, especially in the Ca2+ concentration from 256 to 512 mg/L, which can be attributed to the growing grain size and loosing structure of corrosion scales with increasing Ca2+ concentration. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) investigations reveal that a complex carbonate (Fe, Ca)CO3 forms at high Ca2+ concentration due to the gradual replacement of Fe2+ in FeCO3 by Ca2+.

引用

页码：661 / 666

页数：6

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