Comparative study of passive films of different stainless steels developed on alkaline medium

Abreu, C.M.; Cristóbal, M.J.; Losada, Ricardo; Nóvoa, X.R.; Peña, G.; Pérez, M.C.

doi:10.1016/j.electacta.2004.01.064

Cited by 126 publications

(48 citation statements)

References 15 publications

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“…At a potential higher than 0.5 V SSE , the anodic current increases and a peak is observed at 0.7 V SSE , which is attributed to the oxidation of metal cations and/or alloying elements in the passive film or stainless steel substrate. [13][14][15][16] At a potential higher than 0.8 V SSE , the anodic current decreases and reaches a secondary passivation.…”

Section: Estimation Of Ph and [Hs -] During Lpig Operation-mentioning

confidence: 99%

Effect of Hydrogen Sulfide Ions on the Passive Behavior of Type 316L Stainless Steel

Lee

Kitagawa

Nakanishi

et al. 2015

J. Electrochem. Soc.

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The effect of hydrogen sulfide ions (HS − ) on the passivity of type 316L stainless steel was investigated in pH 8.4 boric acid-borate buffer solution. Galvanostatic polarization of a silver microelectrode covered with Ag 2 S generated both OH − and HS − above the stainless steel surface. During potentiostatic polarization of the stainless steel, the passivity-maintaining current density increased with increase in the concentration of HS − in the vicinity of the surface. The impedance of the stainless steel at a constant frequency decreased during polarization in the presence of HS − , while it was sustained after dilution of HS − . Electrochemical impedance spectroscopy (EIS), Mott-Schottky (M-S) analysis and scanning electrochemical microscopy (SECM) showed that a defective and n-type semiconductive passive film was formed in the solution containing HS − . Auger electron spectroscopy (AES) revealed that metal cations and oxygen vacancies in the passive film on the stainless steel increased when it was formed in a HS − -containing solution. The series of changes in passive film properties is thought to be due to adsorption of HS -on the film surface during the polarization. Corrosion resistance of stainless steel is thought to be dependent on degradation of the passive film, which is important to understand a precursor process involved in localized corrosion such as pitting corrosion and to estimate the long-term performance of the material. Inclusions of sulfides such as manganese sulfide (MnS) are known to provide pitting corrosion sites of stainless steel. [1][2][3] As for the roles of MnS in pitting corrosion, it has been generally agreed that electrochemical and/or chemical reactions of MnS release S species (SO 4 2-, HSO 3 -, S 2 O 3 2-, S and S 2-). The released S species change the composition of the local solution contiguous to the inclusion and lead to a decrease of pH near the micro-area. The decrease in pH and the presence of aggressive S species result in transition of the passive surface to a transpassive state, causing exposure of the substrate to the solution, which is the initiation of pitting corrosion.1-5 Eklund suggested that the dissolution of MnS gives rise to acidification of the solution by producing sulfate ions:Solution acidification is also caused by production of thiosulfate ions:In both cases, elemental sulfur is finally formed. On the other hand, Wraglén proposed that elemental sulfur formed by MnS dissolution leads to further acidification as follows: Many possible explanations for the detrimental effects of various S species causing initiation and/or propagation of pitting corrosion on stainless steel have been presented. Most previous studies have focused on the overall processes, including destabilization of the passive film, removal of the film, and initiation and/or propagation of pits. Since degradation of the passive film is the initial process of pitting corrosion, it is important to contemplate the change in passivity or passive film until depassivation. When stainless st...

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Section: Estimation Of Ph and [Hs -] During Lpig Operation-mentioning

confidence: 99%

Effect of Hydrogen Sulfide Ions on the Passive Behavior of Type 316L Stainless Steel

Lee

Kitagawa

Nakanishi

et al. 2015

J. Electrochem. Soc.

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“…It was also reported that the reproducibility of electrochemical measurements performed on passive films was improved after cathodic polarisation [21,22]. However, the influence of this procedure on the formation of the new passive film in an electrolytic solution was not clearly indicated.…”

Section: Introductionmentioning

confidence: 99%

“…The magnetite can also be partially oxidised to ␥-FeOOH [14,23] and chemically reduced to ␥-Fe 2 O 3 [24]. Abreu et al [21,24] studied the electrochemical behaviour of AISI 304L stainless steel in a deaerated 0.1 M NaOH solution. They used a hierarchical arrangement of three stacked RC pairs.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterisation of a martensitic stainless steel in a neutral chloride solution

Marcelin

Pébère

Régnier

2013

Electrochimica Acta

149

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To cite this version:Sabrina Marcelin, Nadine Pébère, Sophie Régnier. Electrochemical characterisation of a martensitic stainless steel in a neutral chloride solution. Electrochimica Acta, Elsevier, 2013, vol. 87, pp. 32-40 a b s t r a c tThis paper focuses on the characterisation of the electrochemical behaviour of a martensitic stainless steel in 0.1 M NaCl + 0.04 M Na 2 SO 4 solution and is a part of a study devoted to crevice corrosion resistance of stainless steels. Polarisation curves and electrochemical impedance measurements were obtained for different experimental conditions in bulk electrolyte. X-ray photoelectron spectroscopy (XPS) was used to analyse the passive films. At the corrosion potential, the stainless steel was in the passive state and the corrosion process was controlled by the properties of the passive film formed during air exposure. During immersion in the deaerated solution, the passive film was only slightly modified, whereas it was altered both in composition and thickness during immersion in the aerated solution. After cathodic polarisation of the stainless steel electrode surface, the oxide film was almost totally removed and the surface appeared to be uniformly active for oxygen reduction. The new passive film, formed at the corrosion potential, was enriched with iron species and less protective. Impedance diagrams allowed the characterisation of both the oxide film (high-frequency range) and the charge transfer process (low-frequency range).

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“…5. Taking into account the detailed interpretation of the main characteristics in the voltammetric curves presented elsewhere [11,15] it can be noted from Fig. 5(a) and (b) that both steels undergo a clear decrease in the registered currents in the activity region of iron.…”

Section: Electrochemical Characterisation Of Implantation Profiles Bymentioning

confidence: 96%

Effect of chromium and nitrogen co‐implantation on the characteristics of the passive layer developed on austenitic and duplex stainless steels

Abreu

Cristóbal

Nóvoa

et al. 2008

Surface & Interface Analysis

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AISI 304L and SAF 2205 stainless steel samples were implanted with chromium plus nitrogen at saturation dose in order to improve their hardness and wear properties. Consequently, the passive layer is modified so that besides the detected presence of CrN, a clear decrease in the amount of Fe oxides forming the passive layer is detected in both steels; this effect is especially important in AISI 304L. Co-implantation also causes Ni 0 enrichment present at the metal/oxide of unimplanted steels to disappear. The induced changes in the electrochemical response in NaOH solution are finally considered.

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Comparative study of passive films of different stainless steels developed on alkaline medium

Cited by 126 publications

References 15 publications

Effect of Hydrogen Sulfide Ions on the Passive Behavior of Type 316L Stainless Steel

Effect of Hydrogen Sulfide Ions on the Passive Behavior of Type 316L Stainless Steel

Electrochemical characterisation of a martensitic stainless steel in a neutral chloride solution

Effect of chromium and nitrogen co‐implantation on the characteristics of the passive layer developed on austenitic and duplex stainless steels

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