Determination of pitting corrosion stage of stainless steel by galvanodynamic impedance spectroscopy

Orlikowski, Juliusz; Jażdżewska, Agata; Mazur, Robert; Darowicki, Kazimierz

doi:10.1016/j.electacta.2017.09.047

Cited by 28 publications

(9 citation statements)

References 23 publications

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“…In the circuits, R s is the solution resistance; R f is the resistance of passive film; W is the Warburg impedance; and Q f represents the passive film capacitance. The presence of Warburg impedance in a passive system was commonly believed to be related to the vacancy migration under the electric field across the passive film [24], which has been widely reported in the investigations on austenitic stainless steels [24][25][26][27]. The presence of Warburg impedance indicated that the corrosion process of 316L was controlled not only by a charge transfer process but also by a diffusion control process.…”

Section: Eis Resultsmentioning

confidence: 90%

Comparison Study on the Semiconductive and Dissolution Behaviour of 316L and Alloy 625 in Hydrochloric Acid Solution

Wang

Zhang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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The corrosion behaviour of 316L and Alloy 625 was investigated using cyclic polarization, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy, Auger electron spectroscopy and induced coupled plasma-optical emission spectrometer. The results indicated that Alloy 625 showed better corrosion resistance than 316L and the prolonging immersion time could enhance corrosion resistance of the two alloys. The passive film formed on the surface of 316L exhibited an electronic structure of p-p heterojunction, with Fe 3 O 4 and Cr 2 O 3 enriched in the outer and inner layers, respectively. However, Alloy 625 presented the electronic structure of n-p heterojunction dominated by the outer Fe 2 O 3 /NiFe 2 O 4 and inner Cr 2 O 3 . This resulted in the opposite semiconductive properties of the passive films formed on the two materials. In the acid solutions, Fe and Mo suffered from selective dissolution while Cr and Ni were relatively stable. The corrosion rates were mainly dominated by the dissolution of iron. Alloy 625 presented better corrosion resistance than 316L due to the obviously lower content of Fe and the higher content of Cr and Ni in the passive film. The continuously selective dissolution of iron resulted in the increase in Cr/Fe ratio in the passive film, which was responsible for the enhancement in corrosion resistance.

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Section: Eis Resultsmentioning

confidence: 90%

Comparison Study on the Semiconductive and Dissolution Behaviour of 316L and Alloy 625 in Hydrochloric Acid Solution

Wang

Zhang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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“…At these points, the current density increases rapidly which produces a small plateau in the curve. However, the pit growing process was not stable at this stage . In the trans-passivation zone (the region after the breakdown potential), all heat-treated samples are presented with the secondary passivation trends.…”

Section: Discussionmentioning

confidence: 99%

“…However, the pit growing process was not stable at this stage. 52 In the transpassivation zone (the region after the breakdown potential), all heat-treated samples are presented with the secondary passivation trends. This phenomenon shows that all heat treated Ti-5Cu samples have the ability to quickly repair after the passivation film ruptures.…”

Section: Discussionmentioning

confidence: 99%

Improved Corrosion Resistance on Selective Laser Melting Produced Ti-5Cu Alloy after Heat Treatment

Qin

Liu

Sercombe

et al. 2018

ACS Biomater. Sci. Eng.

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A Ti-5Cu alloy produced by selective laser melting exhibits a nonuniform Ti2Cu phase structure, which contains a small amount of α′ phase in melt pool boundaries thereby resulting in reduced corrosion resistance. The heat-treatment process proposed in this work eliminates the deleterious effect of α′ phase and the Ti2Cu phase is refined using different cooling rates, which improves the corrosion resistance. The electrochemical results indicate that the heat-treated Ti-5Cu samples have similar corrosion behavior to pure CP-Ti. A slower cooling rate produces a larger spacing between the Ti2Cu phases in the microstructure of the sample, resulting in higher corrosion resistance. The corrosion behavior of SLM-produced Ti-5Cu and heat-treated counterparts with different microstructure are detailed discussed.

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“…The electrochemical impedance spectroscopy (EIS) data can be analyzed using the equivalent circuit R(Q(RW)) model shown in Figure 6. [38] In this equivalent circuit, R s is the solution resistance, Q is the electric double layer constant phase angle element, R t is the polarization resistance, and W is the Warburg impedance equivalent element. The electrochemical impedance is shown below in formula ( 5)…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Mechanism of surface corrosion resistance of 304 stainless steel processed by nanosecond laser pulses

Yang

Wang

Xiong

et al. 2022

Materials & Corrosion

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A nanosecond pulsed fiber laser was used to modify the surface of 304 stainless steel. The compactness, microstructure, chemical composition, and corrosion resistance of the stainless steel passive film were observed by the blue dot detection method, scanning electron microscopy, x-ray photoelectron spectroscopy, and electrochemical methods. The influence of different laser fluences on the stability and corrosion resistance of the stainless steel passive film was studied. The results show that with increasing laser fluence, the discoloration reaction time of the stainless steel surface increases first and then decreases, while the surface roughness decreases first and then increases.

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Determination of pitting corrosion stage of stainless steel by galvanodynamic impedance spectroscopy

Cited by 28 publications

References 23 publications

Comparison Study on the Semiconductive and Dissolution Behaviour of 316L and Alloy 625 in Hydrochloric Acid Solution

Comparison Study on the Semiconductive and Dissolution Behaviour of 316L and Alloy 625 in Hydrochloric Acid Solution

Improved Corrosion Resistance on Selective Laser Melting Produced Ti-5Cu Alloy after Heat Treatment

Mechanism of surface corrosion resistance of 304 stainless steel processed by nanosecond laser pulses

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