Changes in the passive layer of corrugated austenitic stainless steel of low nickel content due to exposure to simulated pore solutions

Bautista, A.; Blanco, Ginesa; Velasco, F.; Gutiérrez, Alejandro; Soriano, L.; Palomares, F. J.; Takenouti, H.

doi:10.1016/j.corsci.2009.01.012

Cited by 83 publications

(57 citation statements)

References 28 publications

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“…A comparison of resistances R 2 after one month of exposure, when both steels are passive, demonstrates that the charge transfer resistance of the passive film formed on 16 wt.% Cr steel is two orders of magnitude higher than of the 10 wt.% Cr steel (182.2 kΩ cm 2 compared to 14.1 MΩ cm 2 ). This significant difference can be attributed to the formation of a more stable Cr-rich passive film in the case of 16 wt.% Cr steel compared to the case of 10 wt.% Cr steel [21]. The resistances R 1 after one month of exposure have comparable values for both tested steels (several kΩ cm 2 ), supporting the attribution of this resistance to the redox transformation occurring on the surface of the oxide film formed on both types of steel.…”

Section: Micro-x-ray Diffraction (μ-Xrd) and Micro-x-ray Fluorescencesupporting

confidence: 64%

“…Therefore, even though the corrosion initiated and propagated for both steel specimens, the corrosion resistance of the 16 wt.% Cr steel was still significantly higher than that of the 10 wt.% Cr steel, even during the corrosion propagation period. Higher corrosion resistance of this steel during passivity is attributed to the composition of the passive film and is dependent on the chemical composition of the bulk material [20][21][22].…”

Section: Corrosion Activitymentioning

confidence: 99%

“…Because of rising nickel prices, however, new types of corrosion resistant steels with lower percentages of alloying elements have been developed, e.g., low-nickel, high-chromium corrosion-resistant steels, which can be a costeffective corrosion resistant alternative to highly alloyed stainless steels. So far, published research on these types of steel as concrete reinforcement has focused on the corrosion initiation phase, mainly on the characterization of the passive film, and on the critical conditions for the onset of corrosion [20][21][22][23][24]. Long-term research of corrosion behaviour of these steels in concrete is very scarce, especially those aiming at evaluating the real-time propagation of corrosion and the formation of corrosion products.…”

Section: Introductionmentioning

confidence: 99%

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Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete

Serdar

Meral

Kunz

et al. 2015

Cement and Concrete Research

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The mineralogy and spatial distribution of nano-crystalline corrosion products that form in the steel/concrete interface were characterized using synchrotron X-ray micro-diffraction (μ-XRD). Two types of low-nickel highchromium reinforcing steels embedded into mortar and exposed to NaCl solution were investigated. Corrosion in the samples was confirmed by electrochemical impedance spectroscopy (EIS). μ-XRD revealed that goethite (α-FeOOH) and akaganeite (β-FeOOH) are the main iron oxide-hydroxides formed during the chlorideinduced corrosion of stainless steel in concrete. Goethite is formed closer to the surface of the steel due to the presence of chromium in the steel, while akaganeite is formed further away from the surface due to the presence of chloride ions. Detailed microstructural analysis is shown and discussed on one sample of each type of steel.

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Section: Micro-x-ray Diffraction (μ-Xrd) and Micro-x-ray Fluorescencesupporting

confidence: 64%

Section: Corrosion Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete

Serdar

Meral

Kunz

et al. 2015

Cement and Concrete Research

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“…It is known that stainless steel has excellent corrosion resistance in the alkaline solution with high pH value [43,[49][50][51], which is related to a thin but very protective oxide film formed on the surface. Therefore, the R ox increases with the continuing cathodic polarization at the later stage.…”

Section: Discussionmentioning

confidence: 99%

Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Sun

Huang

et al. 2018

Coatings

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Abstract:The change of protective current density, the formation and growth of calcareous deposits, and the evolution of passive film on 304 stainless steel (SS) were investigated at different potentials of cathodic polarization in sea water. Potentiostatic polarization, electrochemical impedance spectroscopy (EIS), and surface analysis techniques of scanning electron microscopy (SEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction (XRD) were used to characterize the surface conditions. It was found that the protective current density was smaller for keeping polarization at −0.80 V (vs. saturated calomel electrode (SCE), same as below) than that at −0.65 V. The calcareous deposits could not be formed on 304 SS with polarization at −0.50 V while it was well protected. The formation rate, the morphology, and the constituent of the calcareous deposits depended on the applied potential. The resistance of passive film on 304 SS decreased at the first stage and then increased when polarized at −0.80 V and −0.65 V, which was related to the reduction and the repair of passive film. For the stainless steel polarized at −0.50 V, the film resistance increased with polarization time, indicating that the growth of oxide film was promoted.

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“…Therefore, the high frequency capacitive semicircle can be attributed to a charge transfer process, and the neighboring second semicircle to the passive film [38,39]. The second time constant is connected with an additional relaxation process, whose proceeding is outlined in the presence of ion by adsorbed molecules.…”

Section: Electrochemical Impedance Spectramentioning

confidence: 99%

Influence of pH on the electrochemical behaviour of a duplex stainless steel in highly concentrated LiBr solutions

2011

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The objective is to study the influence of pH on the corrosion and passive behavior of duplex stainless steels (DSS) using potentiodynamic measurements, potentiostatic tests and electrochemical impedance spectroscopy (EIS).DSS are spontaneously passive in heavy brine LiBr solutions. Under potentiostatic conditions at applied anodic potentials within the passive domain an equivalent circuit with two time constants is the most suitable model to describe the corrosion mechanism in the interface electrolyte // passive film // metal. pH modifies the electrochemical properties of the passivity of the alloy in a 992 g / L LiBr solution reducing its resistance with the applied potential.

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Changes in the passive layer of corrugated austenitic stainless steel of low nickel content due to exposure to simulated pore solutions

Cited by 83 publications

References 28 publications

Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete

Spatial distribution of crystalline corrosion products formed during corrosion of stainless steel in concrete

Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Influence of pH on the electrochemical behaviour of a duplex stainless steel in highly concentrated LiBr solutions

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