A spatiotemporal model of interactions among metastable pits and the transition to pitting corrosion

Organ, Levent; Scully, John R.; Mikhailov, Alexander S.; Hudson, John L.

doi:10.1016/j.electacta.2005.04.018

Cited by 69 publications

(37 citation statements)

References 30 publications

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“…They occur at potentials lower than the E pit , being the critical potential for pit stabilization. Spatial and temporal interactions among metastable pits leading to clustering and hence high corrosion rates of stainless steel were investigated thoroughly over last decade within the context of nonlinear dynamics and pattern formation (Lunt et al, 2002;Mikhailov et al, 2009;Organ et al, 2005;Punckt et al, 2004). The potential region where these current transients appear is distinctly different from the potential region within which the large-amplitude complex passive-active current oscillations, discussed in this article, arise.…”

Section: Discussionmentioning

confidence: 99%

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

Sazou¹,

Pavlidou²,

Diamantopoulou³

et al. 2012

Pitting Corrosion

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Section: Discussionmentioning

confidence: 99%

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

Sazou¹,

Pavlidou²,

Diamantopoulou³

et al. 2012

Pitting Corrosion

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“…The reader interested in further details of this concept is advised to consult the original references [74,75,77].…”

Section: The Pitting Corrosion Of Steel As a Cooperative Processmentioning

confidence: 99%

“…The chemical processes associated with the autocatalytic growth of pits can be explained in detail in the following way [74,75], assuming that stainless steel remains in contact with an aqueous NaCl solution. A first pit forms in the preferred site for that which is the Mn(Fe, Cr)S inclusion, i.e., the sulfide-rich inclusion, like MnS, in the Fe-Cr-Ni and Fe-Cr-Ni-Mo alloys.…”

Section: The Pitting Corrosion Of Steel As a Cooperative Processmentioning

confidence: 99%

Cooperative Dynamics of Coupled and Forced Oscillators

Orlik

2012

Self-Organization in Electrochemical Systems II

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The formation of dissipative patterns on electrode surfaces is related to various kinds of spatial couplings that interact with the electrochemical process in a way dependent, among others, on the geometrical arrangement of the electrodes and the operational mode of the electrochemical experiments. A natural development of the concept of individual reaction sites engaged into such couplings is the case of coupled oscillators. It is thus not surprising that the treatment of coupling of the individual oscillators and spatiotemporal phenomena in a single oscillator may have common points. The analysis of such complex systems allows to understand better the general mechanisms underlying the spatiotemporal phenomena, including the coupling that exist between oscillators in living systems, e.g., in the biological cell membranes.The coupling of chemical or electrochemical oscillators can lead to either more complex or simpler oscillatory regimes, in the latter case including even ceasing of the oscillations. A special variant of such coupling can be realized through the external perturbation of a single oscillator or of a set of them.Karantonis and Nakabayashi [1] have analyzed the case of coupling of two limit cycle electrochemical oscillators, described by only two dynamical variables. In this work the diffusive coupling in one dynamical variable is considered which, under appropriate conditions, can lead to dephasing of the oscillators. This particular problem is related to the suggestion by Kuramoto [2] that chemical spatiotemporal chaos might arise where diffusive coupling leads to dephasing. The problem is important since it was shown, in terms of the model approach, that the diffusive coupling of the transmembrane voltage, in the presence of a strong deformation of the phase flow in the vicinity of the limit cycle, can cause the dephasing of oscillators and bursting oscillations [3]. The model of electrochemical M. Orlik, Self-Organization in Electrochemical Systems II, Monographs in Electrochemistry,

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“…Many works have focused on the transformation from metastable pits to stable pits [12][13][14][15], but less work has been done on the mechanism of the effect of stable pits on the nucleation of metastable pits [16]. Organ et al [17] considered that the interactions among pitting events could lead to the formation of clusters of metastable pits and an explosive growth in the total number of pits. Gonzalez et al [18] found that the reduction of ferric ions in the rust layer on steel dominated the cathodic depolarization over oxygen, and favored the corrosion of rusted steel.…”

Section: Introductionmentioning

confidence: 98%

EIS and adjunct electrical modeling for material selection by evaluating two mild steels for use in super-alkaline mineral processing

et al. 2011

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The production of metal concentrates during mineral processing of ferrous and non-ferrous metals involves a variety of highly corrosive chemicals which deteriorate common mild steel as the material of choice in the construction of such lines, through rapid propagation of localized pitting in susceptible parts, often in sensitive areas. This requires unscheduled maintenance and plant shut down. In order to test the corrosion resistance of different available materials as replacement materials, polarization and electrochemical impedance spectroscopy (EIS) tests were carried out. The EIS numerical outputs were then transformed into an equivalent electric circuit using Z-View software, and the predictive behavior was contrasted with actual performance after long-term immersion, depicted through SEM, EDS, XRD and weight change observations. Also, results of pits and cracks, obtained with climax software-enhanced polarization resistance, and reduced capacitance added to much diminished current densities, verified the acceptable performance of CK 45 compared with high priced stainless steel substitutes with comparable operational life. Therefore, CK 45 can be a suitable alternative in steel constructions which are exposed to super-alkaline and corrosive environments.

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A spatiotemporal model of interactions among metastable pits and the transition to pitting corrosion

Cited by 69 publications

References 30 publications

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

Cooperative Dynamics of Coupled and Forced Oscillators

EIS and adjunct electrical modeling for material selection by evaluating two mild steels for use in super-alkaline mineral processing

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