The effects of Cr/Mo micro-alloying on the corrosion behavior of carbon steel in CO2-saturated (sweet) brine under hydrodynamic control
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Author(s)
Type
Journal Article
Abstract
The effects of micro-alloying of plain carbon steel with Cr and Mo on the corrosion behavior in CO2-saturated (sweet) brine (0.5 M
NaCl, pH 6.6) environment, under hydrodynamic conditions, at 80◦C were investigated. Crystalline siderite/chukanovite scales
formed on all the alloys. Analysis of potentiostatic current transient data suggest that there exists a synergistic interaction between
Cr and Mo, which induces more rapid crystallization of the scale compared to Mo-free steels. Increasing the Mo content also
suppressed the transport-dependent dissolution current passing through the initially-present amorphous surface film. TEM images
of the FIB-sectioned corrosion scales confirm that the corrosion scale formed on 1Cr0.7Mo is comparatively thinner and yet offers
greater protectiveness when compared to the plain carbon steel.
NaCl, pH 6.6) environment, under hydrodynamic conditions, at 80◦C were investigated. Crystalline siderite/chukanovite scales
formed on all the alloys. Analysis of potentiostatic current transient data suggest that there exists a synergistic interaction between
Cr and Mo, which induces more rapid crystallization of the scale compared to Mo-free steels. Increasing the Mo content also
suppressed the transport-dependent dissolution current passing through the initially-present amorphous surface film. TEM images
of the FIB-sectioned corrosion scales confirm that the corrosion scale formed on 1Cr0.7Mo is comparatively thinner and yet offers
greater protectiveness when compared to the plain carbon steel.
Date Issued
2018-04-07
Date Acceptance
2018-04-01
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2018, 165 (5), pp.C278-C288
ISSN
0013-4651
Publisher
ELECTROCHEMICAL SOC INC
Start Page
C278
End Page
C288
Journal / Book Title
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume
165
Issue
5
Copyright Statement
© 2018 The Author(s). Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
License URL
Sponsor
Qatar Shell Research and Technology Center QSTP LLC
Shell Global Solutions International BV
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000431803900072&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
4900001714
PT61050 / PO4550133349
Subjects
Science & Technology
Physical Sciences
Technology
Electrochemistry
Materials Science, Coatings & Films
Materials Science
X-RAY-DIFFRACTION
CO2 CORROSION
DIOXIDE CORROSION
PIPELINE STEELS
MICROSTRUCTURE
ELECTRODE
CHROMIUM
FLOW
CR
CRYSTALLIZATION
Publication Status
Published