The electrochemistry of 13% chromium stainless steel in oilfield brines
The electrochemistry of 13% chromium stainless steel in oilfield brines
The electrochemistry of a 13% Cr stainless steel (API5CT L80-13Cr) in 3% NaCl containing acetate and either acetic acid or carbon dioxide at 333 K is explored using RDE voltammetry. The reduction of proton, carbonic acid and acetic acid occur simultaneously, immediately negative to the corrosion potential. Acetic acid gives a well formed reduction wave and the current densities increase with the equilibrium concentration of acetic acid in the medium; in the plateau region, the reduction is mass transport controlled. Despite this reduction process, the corrosion resistance and passivation current density are independent of the acetic acid concentration. It is confirmed that the 13% Cr stainless steel is much more resistant to corrosion that X65 carbon steel and, unlike the carbon steel, its rate of corrosion does not vary with acetic acid concentration. The properties of the passivating film appear to dominate the behaviour of the 13% Cr stainless steel.
13% cr steel, brine/acetate/carbon dioxide solutions, corrosion
steady-state voltammetry, carbon-dioxide solutions, weak acids, hydrogen evolution, corrosion, temperature, microelectrodes, environments
4109-4116
Sidorin, Dmitry
d5d6b497-0e0c-4bc1-86ba-01c01e6dd330
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Hedges, Bill
005e9d9a-1f03-4d54-b1cb-e7b521daf163
25 July 2005
Sidorin, Dmitry
d5d6b497-0e0c-4bc1-86ba-01c01e6dd330
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Hedges, Bill
005e9d9a-1f03-4d54-b1cb-e7b521daf163
Sidorin, Dmitry, Pletcher, Derek and Hedges, Bill
(2005)
The electrochemistry of 13% chromium stainless steel in oilfield brines.
Electrochimica Acta, 50 (20), .
(doi:10.1016/j.electacta.2005.01.027).
Abstract
The electrochemistry of a 13% Cr stainless steel (API5CT L80-13Cr) in 3% NaCl containing acetate and either acetic acid or carbon dioxide at 333 K is explored using RDE voltammetry. The reduction of proton, carbonic acid and acetic acid occur simultaneously, immediately negative to the corrosion potential. Acetic acid gives a well formed reduction wave and the current densities increase with the equilibrium concentration of acetic acid in the medium; in the plateau region, the reduction is mass transport controlled. Despite this reduction process, the corrosion resistance and passivation current density are independent of the acetic acid concentration. It is confirmed that the 13% Cr stainless steel is much more resistant to corrosion that X65 carbon steel and, unlike the carbon steel, its rate of corrosion does not vary with acetic acid concentration. The properties of the passivating film appear to dominate the behaviour of the 13% Cr stainless steel.
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Published date: 25 July 2005
Keywords:
13% cr steel, brine/acetate/carbon dioxide solutions, corrosion
steady-state voltammetry, carbon-dioxide solutions, weak acids, hydrogen evolution, corrosion, temperature, microelectrodes, environments
Organisations:
Electrochemistry & Surface Science Group
Identifiers
Local EPrints ID: 344852
URI: http://eprints.soton.ac.uk/id/eprint/344852
ISSN: 0013-4686
PURE UUID: 493e8821-b08c-4d8b-8925-fc69ca1fc8e6
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Date deposited: 12 Feb 2013 14:51
Last modified: 14 Mar 2024 12:18
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Author:
Dmitry Sidorin
Author:
Bill Hedges
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