Kinetics of electrode processes on the iron electrode

Kabanov, B. N.; Burstein, R.; Frumḳin, A.

doi:10.1039/df9470100259

“…Based on the experimental results obtained on the corroding CS, the Tafel slopes of anodic and cathodic reactions at the low overpotential region were 40 mV decade -1 and 60 mV decade -1 , respectively [16]. These values are in good agreement with the Tafel slope values obtained by Kabanov et al [17]. From figure 4, the anodic slope can be written as:…”

Section: Theoretical Considerationssupporting

confidence: 78%

Theoretical and experimental study of galvanic coupling effects between carbon steel and stainless steels

Qian

¹

,

Qu

²

2009

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1007/s10800-009-9998-8 Electrochemistry, 40, 2, pp. 247-256, 2010-02-01 Theoretical and experimental study of galvanic coupling effects between carbon steel and stainless steels Qian, S. Y.; Qu, D. Journal of Appliedhttp://www.nrc-cnrc.gc.ca/irc T he ore t ic a l a nd e x pe rim e nt a l st udy of ga lva nic c oupling e ffe c t s be t w e e n c a rbon st e e l a nd st a inle ss st e e ls NRCC-53236Qian, S.Y.; Qu, D. February 2010A version of this document is published in / Une version de ce document se trouve dans:Journal of Applied Electrochemistry, 40, (2), February, DOI: 10.1007/s10800-009-9998-8The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42Theoretical and experimental study of galvanic coupling effects between carbon steel and stainless steels S. Qian • D. Qu AbstractThe use of stainless steel in high corrosion-risk areas represents a viable option for reducing the life-cycle cost and extending the service life of concrete structures. However, the possible galvanic corrosion between it and carbon steel continues to be a concern. In this paper the galvanic coupling behaviours of carbon steel and three different stainless steels were investigated in simulated pore solutions and concrete specimens. The results showed that the oxygen reduction reaction was much lower on stainless steel than on passive carbon steel, leading to a lower galvanic coupling current between stainless steel and corroding carbon steel than that between passive and corroding carbon steels. However, rust contamination of stainless steel was found to increase galvanic coupl...

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“…This is because part of i mac (about 40%) has to compensate for the decrease in the cathodic current of the active steel and only the remaining part (about 60% of i mac ) contributes to the increase in the corrosion current density, Δi corr . The proportions of the two parts of i mac (40% and 60%, respectively) was calculated from the Tafel slopes of anodic (40 mV/decade) and cathodic polarization (60 mV/decade) measured on a steel electrode, and these measured slopes conformed to the results obtained by Kabanov et al [17]. Therefore, the increased anodic corrosion rate is a more direct value than the macrocell current density to show the change in the corrosion of the active steel after it is connected with a passive steel.…”

Section: Macrocell Corrosion Between Passive and Active Reinforcing Smentioning

confidence: 49%

Theoretical and experimental study of microcell and macrocell corrosion in patch repairs of concrete structures

Qian

¹

,

Zhang

²

,

Qu

³

2006

Cement and Concrete Composites

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Cement & Concrete Composites, 28, pp. 685-695, 2006-09-01 Theoretical and experimental study of microcell and macrocell corrosion in patch repair Qian, S. Y.; Zhang, J. Y. AbstractPatch repair is commonly used to rectify localized corrosion induced damage in concrete structures. However, inadequate durability in patch repair systems caused by new corrosion attack is prevalent. From the prevailing understanding, the mechanism is attributed to macrocell corrosion formed between repaired area (called patch) and its adjacent unrepaired area (called substrate), and thereby ensuring electrochemical compatibility between the two areas is deemed to be the key element to reduce the corrosion risk and thus to achieve a successful repair. This paper examined the corrosion mechanism and the concept of compatibility in patch repair systems from fundamental electrochemical principles and experimental verification. It was illustrated that both macrocell and microcell corrosion mechanisms could play significant roles, and the total corrosion could be underestimated if the latter is overlooked. Although the incompatibility serves as the driving force for the macrocell corrosion, in light of corrosion kinetics, it was shown that the corrosion magnitude depends more on the individual corrosion kinetics of the anode or cathode.

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“…Figure 4 shows the repetitive voltammetric profile of a polished and chemical etched steel surface in 2 M sodium hydroxide run at a scan rate of 0.10 V s )1 between )1.5 and 0.6 V. One hump and five peaks have been found in the forward anodic scan and four peaks and a hump in the reverse cathodic scan. According to the literature [25,26] hump I is related to a coupled process of the simultaneous bare iron dissolution and hydrogen electrosorption processes on a reduced iron surface [26]. Peaks II (15 lC cm )2 ) and III (60 lC cm )2 ) in the anodic sweep, while peaks VIII and IX (180 lC cm )2 ) in the cathodic scan, are attributed to the Fe(OH) 2 formation and reduction to Fe in two steps [26]:…”

Section: The Electrochemical Behaviour Of Naval Steels In Alkaline Somentioning

confidence: 99%

The Influence of electrochemical surface modifications on naval steel corrosion

Zinola

¹

,

Díaz

²

,

Martínez

³

et al. 2005

J Appl Electrochem

1

0

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The corrosion behaviour of naval steels is characterized by cyclic voltammetric profiles, open-circuit potential decays and polarization curves in 0.5 M sodium nitrate and in 0.6 M sodium chloride at 20°C. Naval steel surfaces can be modified by the application of periodic symmetric and/or asymmetric potential routines in strong alkaline solutions. These perturbations produce the formation of protective or non-protective surface oxides, which can be characterized by scanning electron microscopy and cyclic voltammetry. Corrosion parameters of the new surface oxides are evaluated by polarization curves after long-time exposures in electrolytes containing sodium chloride and sodium nitrate.

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Kinetics of electrode processes on the iron electrode

Cited by 174 publications

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Theoretical and experimental study of galvanic coupling effects between carbon steel and stainless steels

Theoretical and experimental study of galvanic coupling effects between carbon steel and stainless steels

Theoretical and experimental study of microcell and macrocell corrosion in patch repairs of concrete structures

The Influence of electrochemical surface modifications on naval steel corrosion

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