Effect of pH on the Electrochemical Behaviour and Passive Film Composition of 316L Stainless Steel

Wang, Zhu; Zi-qiang, Zhou; Zhang, Lei; Hu, Jian; Zhang, Ziru; Lu, Minxu

doi:10.1007/s40195-018-0794-5

Cited by 43 publications

(13 citation statements)

References 35 publications

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“…Besides, hysteresis loop was not found on the polarization curve of Alloy 625, which indicated that Alloy 625 was pitting resistant under the testing condition. In general, the high current densities at noble potentials in the absence of hysteresis loop could be ascribed to oxygen evolution reaction or the uniform dissolution of the passive film [20,21]. In this case, the high current densities at potentials more positive than 0.85 V (SCE) were most probably due to the uniform dissolution of the passive film, since oxygen evolution reaction would not commonly occur in acid solutions, as also reported in the literature [22].…”

Section: Polarization Behaviourmentioning

confidence: 70%

“…In Fig. 2a, b, each Nyquist plot was composed of one depressed capacitive semi-arc, which was related to the passive film [5,21].…”

Section: Eis Resultsmentioning

confidence: 99%

“…The selective coefficients of Ni and Cr were lower than 1, which indicated that Ni and Cr species were relatively stable in acid solutions. Due to the low stability of iron oxides, the selective dissolution of Fe was very commonly reported [6,12,21,56]. Cr was the key element in the passive film.…”

Section: Selective Dissolution Of the Cation Elements For 316l And Alloy 625mentioning

confidence: 99%

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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: Polarization Behaviourmentioning

confidence: 70%

“…In Fig. 2a, b, each Nyquist plot was composed of one depressed capacitive semi-arc, which was related to the passive film [5,21].…”

Section: Eis Resultsmentioning

confidence: 99%

Section: Selective Dissolution Of the Cation Elements For 316l And Alloy 625mentioning

confidence: 99%

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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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“…It was also found that R 2 increased and CPE 2 decreased with an increase in the applied potential in the solution, indicating an increase in the stable surface film with reduced physical defects. According to References [33,34], the decrease in CPE 2 can be attributed to the formation of a stable passive film. The results obtained in the FZ medium agree with the CZ; however, the opposite results were observed for SZ.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical and passive behaviour of Cu–Sn bronze in simulated archaeological soil media

Liang

Jiang

Zhang

2020

Materials & Corrosion

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The influence of formation potential on the electrochemical behaviour and passive film properties of Cu-28.6Sn bronze in simulated archaeological soil solutions was evaluated using combined potentiodynamic electrochemical measurements, electrochemical impedance spectroscopy, and the Mott-Schottky (MS) approach, with ex situ surface analytical techniques such as X-ray photoelectron spectroscopy. Passive films were formed in sodium chloride (NaCl) solution and a mixture of NaCl and sodium sulphate and their stability increased as the applied potential increased. The MS measurements indicated that a very thin p-and n-type porous passive film was formed on the bronze in the NaCl and sodium sulphate solution. The calculated donor density decreased exponentially with increasing passive film formation potentials in the NaCl solution and in the NaCl and sodium sulphate mixture. Based on the evaluations of the surface compositional analysis, the primary constituents of the films are Cu and Sn; in addition, dehydration of films was noted.

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“…Based on the above electrochemical results, it can be clarified that as the corrosion time increased, the corrosion product film gradually formed, and the corrosion resistance of the steel gradually improved [25,26]. The enhanced corrosion resistance should be related to the changes in the composition of the product film [27]. The EIS spectra were fitted with the electrochemical equivalent circuit using EC-Lab V11.20 software.…”

Section: Eis Analysismentioning

confidence: 99%

Initial Corrosion Behavior of 12Cr1MoV Steel in Thiosulfate-Containing Sodium Aluminate Solution

Yuan

Chen

et al. 2020

Metals

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When alumina is produced by the Bayer process with high-sulfur bauxite, the sulfur would strongly corrode the 12Cr1MoV steel made heat exchanger. This study investigated the initial corrosion behavior of the 12Cr1MoV steel exposed to a thiosulfate-containing sodium aluminate (TCSA) solution under the evaporation conditions of alumina production. The obtained corrosion rate equation is V = 6.306·t·exp(−0.71). As corrosion progressed, with the corrosion product film growing, the corrosion current density declines slowly, and the corrosion resistance of the steel is increased. At 1–3 days, the corrosion product film consisted of FeO, Fe2O3, and FeOOH. S2O32− lead to corrosion in local areas of the steel and pits appeared. AlO2− is transformed into Al(OH)3 and filled in the corrosion pits. At 4 and 5 days, Fe3O4 is generated in the outermost layer, and Al(OH)3 is shed from the corrosion pits. The corrosion mechanism of 12Cr1MoV steel in a TCSA solution is proposed based on the experimental results.

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Effect of pH on the Electrochemical Behaviour and Passive Film Composition of 316L Stainless Steel

Cited by 43 publications

References 35 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

Electrochemical and passive behaviour of Cu–Sn bronze in simulated archaeological soil media

Initial Corrosion Behavior of 12Cr1MoV Steel in Thiosulfate-Containing Sodium Aluminate Solution

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