In situ synchrotron X-ray diffraction study of the effect of microstructure and boundary layer conditions on CO2 corrosion of pipeline steels

被引：48
|
作者：
Ko, M. [1 ,4 ]
Ingham, B. [2 ,5 ]
Laycock, N. [3 ]
Williams, D. E. [4 ,5 ]
机构：
[1] Quest Integr Grp, Lower Hutt 5045, New Zealand
[2] Callaghan Innovat, Lower Hutt 5010, New Zealand
[3] Univ Birmingham, Coll Engn & Phys Sci, Birmingham B15 2TT, W Midlands, England
[4] Univ Auckland, Sch Chem Sci, Auckland 1022, New Zealand
[5] Victoria Univ Wellington, Sch Chem & Phys Sci, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6440, New Zealand
来源：
CORROSION SCIENCE | 2015年 / 90卷
关键词：
Low alloy steel; Carbon steel; X-ray diffraction; Potentiostatic; CARBON-DIOXIDE CORROSION; SCALE FORMATION; CHUKANOVITE; PRODUCTS; CHROMIUM; OIL;
D O I：
10.1016/j.corsci.2014.10.010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study demonstrates that the nucleation of crystalline scales of siderite and chukanovite onto the surface of low-alloy steels under CO2 corrosion at elevated temperature is critically dependent on initial surface roughness, on microstructure-related surface roughness developed during corrosion, and on stirring in the solution. This study confirms that effects due to chromium micro-alloying in the steel are extremely important for siderite nucleation. On average, these effects dominate over the effects of microstructure. However, spatial variation of the corrosion deposit thickness indicates an interdependence between microstructure and chromium-enhanced siderite nucleation with the possibility of localised corrosion developing as a result. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：192 / 201
页数：10
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