Characterization of corrosion scale formed on 3Cr steel in CO2-saturated formation water

被引：91

作者：

Guo, Shaoqiang ^{[1
]}

Xu, Lining ^{[1
]}

Zhang, Lei ^{[1
]}

Chang, Wei ^{[2
]}

Lu, Minxu ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Ctr Corros & Protect, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] CNOOC Res Inst, Beijing 100027, Peoples R China

来源：

CORROSION SCIENCE | 2016年 / 110卷

关键词：

Low alloy steel; TEM; XPS; Polarization; Pitting corrosion; CARBON-DIOXIDE CORROSION; MILD-STEEL; MECHANISTIC MODEL; PIPELINE STEEL; ALLOY-STEELS; PART; CO2; CHROMIUM; IRON; OIL;

D O I：

10.1016/j.corsci.2016.04.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of the corrosion scale formed on 3Cr steel was investigated by scanning electron microscopy (SEM) and X-Ray Diffraction (XRD). The inner layer was characterized by Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Thermogravimetric analysis differential scanning calorimetry (TG-DSC). The results show the inner layer is an amorphous-like structure containing some nano-quasicrystalline and nanocrystalline grains which is more uniform and less porous than the crystalline FeCO3 layer. At the 2nd stage, the transition of cathodic reactions was found, and the growth of the FeCO3 phase in the inner layer dramatically decreased the film porosity, resulting in the passivation. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：123 / 133

页数：11

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