Effects of a magnetic field on the anodic dissolution, passivation and transpassivation behaviour of iron in weakly alkaline solutions with or without halides

Lu, Zhanpeng; Huang, Chunbo; Huang, Delun; Yang, Wulin

doi:10.1016/j.corsci.2005.11.014

Cited by 100 publications

(53 citation statements)

References 40 publications

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“…2. All of the anodic curves show an active-passive-transpassive process, which is similar to that reported in previous works [7,22]. In 0.01-0.2 mol/L NaOH solutions, earlier oxidation occurs at about −0.85 V and forms a current-density prepeak denoted by PP.…”

Section: Methodssupporting

confidence: 75%

“…During the electrochemical testing, the low-valence oxides formed at low potentials undergo the further oxidation reaction [22]. Thus, the first current-density peak (E P1 in Fig.…”

Section: Anodic Polarization Behavior Of Fe 78 Si 9 B 13 Glassy Alloymentioning

confidence: 99%

“…According to Eq. (9), the constant η = η(T, pH, OH − ) as the film dissolution rate can be transformed into η′ = η′(T, pH, Cl − ) in NaCl solutions, and the constant η increases with increasing concentration [22]. Hence, the current density i Z2 of the samples is expected to increase with increasing NaCl concentration (Fig.…”

Section: Anodic Polarization Behavior Fe 78 Si 9 B 13 Glassy Alloy Inmentioning

confidence: 99%

“…According to the explanation of the active dissolution and passivation process of iron in alkaline solutions [22,26], the hydro-ligand MOH ads (where M represents a metal) is the dominant product in the dissolution process at relatively low potentials [27]. Hence, the current-density prepeak (E PP ) at low potentials is associated with the formation of a low-valence oxide, which can be expressed as …”

Section: Anodic Polarization Behavior Of Fe 78 Si 9 B 13 Glassy Alloymentioning

confidence: 99%

“…The current density of anodic polarization for iron in alkali solutions (i a ) can be calculated by the following equation [22] …”

Section: Anodic Polarization Behavior Of Fe 78 Si 9 B 13 Glassy Alloymentioning

confidence: 99%

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Non-monotonic influence of a magnetic field on the electrochemical behavior of Fe78Si9B13 glassy alloy in NaOH and NaCl solutions

Zhang

Li²,

Pang³

et al. 2014

Int J Miner Metall Mater

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Abstract:The corrosion behavior and microstructure of Fe 78 Si 9 B 13 glassy alloy in NaOH and NaCl solutions under a 0.02-T magnetic field were investigated through electrochemical testing and scanning electron microscopy (SEM). The current-density prepeak (PP) in the anodic polarization curves in low-concentration NaOH solutions (classified as type I) tends to disappear when the NaOH concentration is increased to 0.4 mol/L and the magnetic field is applied. Under the magnetic field, the height of the second current-density peak is increased in low-concentration NaOH solutions (type I) but decreased in high-concentration NaOH solutions (type II). The non-monotonic effect of the magnetic field was similarly observed in the case of polarization curves of samples measured in NaCl solutions. Ring-like corroded patterns and round pits are easily formed under the magnetic field in NaOH and NaCl solutions. These experimental results were discussed in terms of the magnetohydrodynamic (MHD) effect.

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Section: Methodssupporting

confidence: 75%

“…During the electrochemical testing, the low-valence oxides formed at low potentials undergo the further oxidation reaction [22]. Thus, the first current-density peak (E P1 in Fig.…”

Section: Anodic Polarization Behavior Of Fe 78 Si 9 B 13 Glassy Alloymentioning

confidence: 99%

Section: Anodic Polarization Behavior Fe 78 Si 9 B 13 Glassy Alloy Inmentioning

confidence: 99%

Section: Anodic Polarization Behavior Of Fe 78 Si 9 B 13 Glassy Alloymentioning

confidence: 99%

“…The current density of anodic polarization for iron in alkali solutions (i a ) can be calculated by the following equation [22] …”

Section: Anodic Polarization Behavior Of Fe 78 Si 9 B 13 Glassy Alloymentioning

confidence: 99%

See 3 more Smart Citations

Non-monotonic influence of a magnetic field on the electrochemical behavior of Fe78Si9B13 glassy alloy in NaOH and NaCl solutions

Zhang

Li²,

Pang³

et al. 2014

Int J Miner Metall Mater

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A stochastic analysis of the effect of magnetic field on the pitting corrosion susceptibility of pure magnesium

Zhang

Shao

et al. 2010

Materials & Corrosion

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The effect of magnetic field on the pitting corrosion susceptibility of pure magnesium was investigated by stochastic approaches. Stochastic models had been applied to simulate pitting corrosion as the combination of two physical processes: pit initiation and pit growth. The results revealed that magnetic field increased the pitting corrosion susceptibility of pure magnesium. For the pit initiation process, the presence of magnetic field changed the mechanism of pit initiation from the parallel birth and death stochastic model (B1) to the parallel birth stochastic model (A3). Magnetic field increased the pit generation rate l while decreased the repassivation rate m, which indicated that magnetic field accelerated the pit initiation process of pure magnesium. For the pit growth process, magnetic field didn't change the pit growth mechanism, but it could decrease the ability of repassivation of pitting corrosion resulting in a great probability for the stable pitting corrosion to grow up with a higher growth rate and finally develop into larger pit cavity.

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Retarding the corrosion of iron by inhomogeneous magnetic fields

Sueptitz

Tschulik

Uhlemann

et al. 2013

Materials & Corrosion

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The influence of a magnetic field yielding high magnetic flux densities and high flux density gradients on the free corrosion behavior of iron in a low concentrated acidic solution with and without chloride ions is studied by long time exposure experiments and electrochemical impedance spectroscopy (EIS). A decrease of the corrosion rate in electrode surface regions of high magnetic flux density is detected. This decrease of the dissolution rate is significantly stronger in the presence of chloride ions. The observed effects are discussed on the basis of the magnetically induced forces acting on the ions present in the solution, the surface coverage fraction of adsorbed species, and the stability of these adsorbed species.

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Effects of a magnetic field on the anodic dissolution, passivation and transpassivation behaviour of iron in weakly alkaline solutions with or without halides

Cited by 100 publications

References 40 publications

Non-monotonic influence of a magnetic field on the electrochemical behavior of Fe78Si9B13 glassy alloy in NaOH and NaCl solutions

Non-monotonic influence of a magnetic field on the electrochemical behavior of Fe78Si9B13 glassy alloy in NaOH and NaCl solutions

A stochastic analysis of the effect of magnetic field on the pitting corrosion susceptibility of pure magnesium

Retarding the corrosion of iron by inhomogeneous magnetic fields

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