Depassivation–repassivation behavior of type-312L stainless steel in NaCl solution investigated by the micro-indentation

Yamamoto, Taisuke; Fushimi, Koji; Seo, Masahiro; Tsuri, S.; Adachi, Tetsuo; Habazaki, H.

doi:10.1016/j.corsci.2008.11.020

Cited by 51 publications

(23 citation statements)

References 43 publications

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“…and MoO − 2 ) and substrate (Cr − 2 , Fe − 2 , and Ni − 2 ) are plotted in logarithmic scale vs. sputtering time. The position of the "modified alloy" region between the oxide film and metallic bulk substrate regions, where Ni is found enriched in agreement with previous studies on austenitic stainless steels (Olefjord and Elfström, 1982;De Vito and Marcus, 1992;Olsson and Hörnström, 1994;Hakiki et al, 1998;Maurice et al, 1998Maurice et al, , 2015Bojinov et al, 2001;Yamamoto et al, 2009;Wang et al, 2019), was defined using the Ni − 2 ions intensity profile and placed between 70 and 130 s of sputtering. This region is in principle metallic and does not contain any oxide species in a stratified model of the surface composition.…”

Section: Resultssupporting

confidence: 84%

“…On Fe-Cr-Ni austenitic stainless steels, the passive films contain no or very little Ni(II) species and the metallic alloy region underneath the oxide is enriched in nickel (Olefjord and Elfström, 1982;De Vito and Marcus, 1992;Olsson and Hörnström, 1994;Hakiki et al, 1998;Maurice et al, 1998Maurice et al, , 2015Bojinov et al, 2001;Yamamoto et al, 2009). SS grades alloyed with a few at% Mo better resist localized corrosion by pitting in chloride-containing environments.…”

Section: Introductionmentioning

confidence: 99%

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Mechanisms of Cr and Mo Enrichments in the Passive Oxide Film on 316L Austenitic Stainless Steel

et al. 2019

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An approach preventing contact to ambient air during transfer from liquid environment for electrochemical treatment to UHV environment for surface analysis by X-Ray Photoelectron Spectroscopy and Time-of-Flight Secondary Ion Mass Spectrometry was applied to study the mechanisms of Cr and Mo enrichments in the passive oxide film formed on 316L austenitic stainless steel. Starting from the air-formed native oxide-covered surface, exposures were conducted in aqueous sulfuric acid solution first at open circuit potential and then under anodic polarization in the passive range. At open circuit potential the thickness of the bi-layered oxide film was observed to decrease and the enrichments of both Cr(III) and Mo, mostly Mo(VI), to markedly increase as well as the film hydroxylation. This is due to preferential dissolution of the Fe(III) oxide/hydroxide, not compensated by oxide growth in the absence of an electric field established by anodic polarization. Anodic polarization in the passive domain causes the bi-layered structure of the oxide film to re-grow by oxidation of iron, chromium and molybdenum, without impacting the Cr enrichment and only slightly mitigating the Mo enrichment. De-hydroxylation of the inner layer is also promoted upon anodic polarization. These results show that the treatment of the surface oxide film in acid solution at open circuit potential enhances Cr and Mo enrichments and promotes hydroxylation. Passivation by anodic polarization allows dehydroxylation, yielding more Cr oxide, without markedly affecting the Mo enrichment, also beneficial for the corrosion resistance.

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Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Mechanisms of Cr and Mo Enrichments in the Passive Oxide Film on 316L Austenitic Stainless Steel

et al. 2019

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“…These resulted in an abrupt drop in OCP down to more negative values. Actually, galvanic corrosion was established, and the areas depassivated by mechanical wear acted as anode, while the surrounding passivated areas acted as cathode . The OCP measured during sliding tests is a mixed potential which value depends on the state and the integrity of protective passive film on material surface .…”

Section: Resultsmentioning

confidence: 99%

Tribocorrosion behaviour of 304 stainless steel in different corrosive solutions

Zhang

Wang

Yin

et al. 2015

Materials & Corrosion

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Tribocorrosion is often complicated and harmful to metallic components, which depends on the mechanics of the tribological contact, on the electrochemical characters, on the properties of the contacting materials, and on the physico‐chemical properties of the environment. In this work, effects of corrosive media on the friction and wear behaviour, on the corrosion behaviour and on the synergistic effect between them were investigated in detail on a pin‐on‐disc tribometer. Although no electrochemical corrosion occurs in distilled water, its lubricity is so bad that plastic ratchetting effect and abrasive wear are observed on 304SS surface which result in severe material loss. In other three simulated seawater, corrosion and wear interact positively, making the pure mechanical wear and corrosion accelerated wear including abrasion and delamination, be the main reasons for 304SS degradation. Note that solution pH also plays an important role in determining material degradation.

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“…The depth profile of a passive film formed on type-312L stainless steel has been determined by using radio frequency glow discharge optical emission spectroscopy (rf-GDOES) (32), and it has been reported that a passivity-maintaining current of pure iron and the electric charge consumed in repassivation of the pure iron during the microindentation test depend on the degree of cold rolling, i.e., reduction ratio (33). It is expected that substrate dislocations reduce the stability of the passive surface and/or thicken the passive film.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cold Rolling on Passive Film on Pure Iron in pH 8.4 Borate Buffer Solution

et al. 2010

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The influence of substrate dislocations on passivation behavior of a pure iron in pH 8.4 borate buffer solution was investigated. Cold rolling was employed to induce dislocation in the annealed substrate. The dislocation density on the cold rolled substrate depended on the reduction ratio (Red) and was maximum at Red = 60%. The electric charge consumed in the passivation and the passivity-maintaining current increased with increase in the dislocation density. EIS revealed that the dislocation exposed to the iron surface increased donor density in the passive film and reduced charge transfer resistance for the film aging. It was also demonstrated by rf-GDOES that a thick passive film formed on the cold rolled iron compared with that on annealed iron. These results suggest that substrate dislocations enhance the reactions at the substrate/film interface, resulting in the formation of the highly defective passive film.

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Depassivation–repassivation behavior of type-312L stainless steel in NaCl solution investigated by the micro-indentation

Cited by 51 publications

References 43 publications

Mechanisms of Cr and Mo Enrichments in the Passive Oxide Film on 316L Austenitic Stainless Steel

Mechanisms of Cr and Mo Enrichments in the Passive Oxide Film on 316L Austenitic Stainless Steel

Tribocorrosion behaviour of 304 stainless steel in different corrosive solutions

Effect of Cold Rolling on Passive Film on Pure Iron in pH 8.4 Borate Buffer Solution

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