Surface Modification of Stainless Steel by an Alternating Voltage Process

Kwiatkowski, L.; Mansfeld, F.

doi:10.1149/1.2056184

Cited by 20 publications

(10 citation statements)

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“…The fitting results show that the protectiveness of the passive film increases when 0.1 and 0.3 V(rms) AVs are applied to the system. This phenomenon is consistent with findings of Kwiatkowski and Mansfeld, 21 who found that an alternating potential step (AV) passivation can significantly improve the corrosion resistance of stainless steels in acid media. As shown by Song et al, 22 the AV increased the thickness of the passivation film, which consequently resulted in an increase in corrosion protectiveness.…”

Section: Influence Of Avs On Passivation Behavioursupporting

confidence: 92%

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution

Cui

Wang

Liu

et al. 2015

Corrosion Engineering, Science and Technology

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X80 steel exhibits two different steady states in 0.5 mol L 21 NaHCO 3 þ 0.25 mol L 21 Na 2 CO 3 solution with and without precathodic polarisation, which are activation and passivation respectively. Different amplitudes of alternating voltages were superimposed to the pre-and nonprepolarised steels. The results demonstrated that passivation of the non-prepolarised steel was enhanced by low amplitude alternating voltages but was destroyed by high amplitude alternating voltages. Moreover, the corrosion of the prepolarised steel was worsened with the application of alternating voltages.

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Section: Influence Of Avs On Passivation Behavioursupporting

confidence: 92%

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution

Cui

Wang

Liu

et al. 2015

Corrosion Engineering, Science and Technology

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“…Mansfeld et al (51)(52)(53) utilized an Alternating Voltage (AV) passivation process to form modified surface films resulting in enhanced corrosion resistant properties. They studied the effectiveness of AV passivation over DC passivation on Type 304 stainless steel in 0.5 M H 2 SO 4 .…”

Section: Passive Films Formed By Potential Cyclingmentioning

confidence: 99%

Improvement of passivity of Fe–xCr Alloys (x < 10%) by cycling through the reactivation potential

2011

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Classically 13% Cr is required for stable passivity of steel in acidic and neutral solutions not containing inhibitors. Some authors (Mansfeld, Fujimoto) have published potential cycling procedures that generate thick Cr-rich films. Fujimoto cycles right to the transpassivity potential and back in sulphuric acid solution. Our idea is to work very close to the reactivation potential where the passive film (Fe 2 O 3 ) is reductively dissolved to Fe 2+ . We have used an equimolar sodium acetate/acetic acid buffer, at pH 4.7. In exploring this possibility we have obtained new insights into the reactivation process itself. It is under a kind of thermodynamic control, in that the film cannot be reduced, and the metal cannot be dissolved, faster than would exceed the equilibrium concentration of Fe 2+ at the electrode surface. Reductive dissolution leads to a gel-like Cr-rich film, but this is not protective if formed in a single step -Fe dissolution just occurs through it. However alternating formation and reductive dissolution of a Fe-rich film assist the formation of a more robust Cr-rich film.iii

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“…It greatly improves the corrosion resistance of austenitic stainless steels in some corrosive media [8][9][10], but has not been applied to duplex stainless steels. Therefore the purpose of the present investigation was to use it on duplex stainless steel and investigate its effect on the corrosion resistance, and on the morphology, chemical structure and electronic structure of the passive film thus formed.…”

Section: Introductionmentioning

confidence: 99%

Effect of alternating voltage passivation on the corrosion resistance of duplex stainless steel

Zhang

Zhao

et al. 2008

J Appl Electrochem

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Potentiodynamic polarization and E corr versus t curves were obtained, together with electrochemical impedance spectroscopy (EIS) measurements, in order to understand the effects of alternating voltage (AV) passivation on the corrosion resistance of duplex stainless steel (DSS). SEM, EDS and XPS were employed to further investigate the influence of AV passivation on the properties of the passive film. The results of the electrochemical measurements showed that AV passivation significantly improved the corrosion resistance of DSS. SEM images indicated that the surface exhibited a unique morphology after AV passivation treatment, and XPS results suggested that AV passivation greatly increased the thickness of the passive film. Furthermore, significant chromium enrichment and a higher ratio of Fe 3? /Fe 2? were observed in the passive film after AV passivation. Mott-Schottky results confirmed that AV passivation had a strong influence on the semiconducting properties of the passive film.

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Surface Modification of Stainless Steel by an Alternating Voltage Process

Cited by 20 publications

References 0 publications

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution

Improvement of passivity of Fe–xCr Alloys (x < 10%) by cycling through the reactivation potential

Effect of alternating voltage passivation on the corrosion resistance of duplex stainless steel

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Surface Modification of Stainless Steel by an Alternating Voltage Process

Cited by 20 publications

References 0 publications

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L− 1NaHCO3+0.25 mol L− 1Na2CO3solution

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L− 1NaHCO3+0.25 mol L− 1Na2CO3solution

Improvement of passivity of Fe–xCr Alloys (x < 10%) by cycling through the reactivation potential

Effect of alternating voltage passivation on the corrosion resistance of duplex stainless steel

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Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution