Electrochemical evaluation of crevice corrosion of 430 ferritic stainless steel using the microcapillary tube technique

Na, Eun-Young; Ko, Jae-Yong; Baik, Shin-Young

doi:10.1016/j.desal.2005.05.016

Cited by 11 publications

(7 citation statements)

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“…The materials tested in this work were two biomedical alloys (CoCr and Ti6Al4V) and one reference FeCr alloy containing 15 wt.% Cr as the AISI430 stainless steel known to be susceptible to crevice corrosion [ 35 ]. The CoCr alloy was a low-carbon CoCrMo alloy containing 28 wt.% Cr, 6 wt.% Mo, 0.05 wt.% C, and 66 wt.% Co [ 36 ].…”

Section: Methodsmentioning

confidence: 99%

A Crevice Corrosion Model for Biomedical Trunnion Geometries and Surfaces Feature

2021

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Modular hip joint implants were introduced in arthroplasty medical procedures because they facilitate the tailoring of patients’ anatomy, the use of different materials in one single configuration, as well as medical revision. However, in certain cases, such prostheses may undergo deterioration at the head–neck junctions with negative clinical consequences. Crevice-corrosion is commonly invoked as one of the degradation mechanisms acting at those junctions despite biomedical alloys such as Ti6Al4V and CoCr being considered generally resistant to this form of corrosion. To verify the occurrence of crevice corrosion in modular hip joint junctions, laboratory crevice-corrosion tests were conducted in this work under hip joint-relevant conditions, i.e., using similar convergent crevice geometries, materials (Ti6Al4V and CoCr alloys vs. ceramic), surface finish, NaCl solution pHs (5.6 and 2.3), and electrochemical conditions. A theoretical model was also developed to describe crevice-corrosion considering relevant geometrical and electrochemical parameters. To verify the model, a FeCr alloy, known to be sensitive to this phenomenon, was subjected to the crevice-corrosion test in sulfuric acid. The experiments and the model predictions clearly showed that, in principle, crevice corrosion of Ti6Al4V or CoCr is not supposed to occur in typical crevices formed at the stem-neck junction of hip implants.

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Section: Methodsmentioning

confidence: 99%

A Crevice Corrosion Model for Biomedical Trunnion Geometries and Surfaces Feature

2021

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“…They showed that the corrosion rate increases with an increase of the applied torque. In other works, the electrolyte was confined on the metal surface by using an insulating plane [9,19]. One part of the metal surface, in the confined area, is the anode and another part of the metal surface, in contact with the bulk solution, is the cathode.…”

Section: Introductionmentioning

confidence: 99%

“…One part of the metal surface, in the confined area, is the anode and another part of the metal surface, in contact with the bulk solution, is the cathode. Na et al [19] showed, for a ferritic 430 stainless steel, that the initiation time of crevice corrosion decreased when the chloride ion concentration increased or when the electrolyte thickness above the stainless steel decreased. Another setup was used where the cathode and the anode were physically separated but electrically connected [9].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigations on crevice corrosion of a martensitic stainless steel in a thin-layer cell

Marcelin

Pébère

Régnier

2015

Journal of Electroanalytical Chemistry

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International audienceThis paper focuses on crevice corrosion resistance of a martensitic stainless steel. First, electrochemical measurements were performed in deaerated bulk electrolytes for different chloride concentrations and different values of the pH to determine the critical parameters leading to dissolution or breakdown of the passive film. Then, a thin-layer cell was designed to confine the electrolyte between two parallel stainless steel planes. Impedance measurements obtained for different immersion times and electrolyte thicknesses clearly showed the influence of these two parameters on the crevice corrosion rate. A significant decrease of the corrosion resistance when the medium is increasingly confined was observed. The data obtained in the bulk electrolytes were used to determine the critical conditions in the thin-layer cell which impede the repassivation of the stainless steel (pH and [Cl−])

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“…[1][2][3] However, there is no unified theory regarding the initiation of corrosion. The initiation mechanism of the crevice corrosion of stainless steels is roughly classified into three types, namely, the passive dissolution, [4][5][6][7] IR-drop, [8][9][10][11][12] and metastable pitting mechanisms. [13][14][15][16][17][18][19][20][21][22][23][24] In the passive dissolution mechanism, which was described by Oldfield and Sutton et al, [4][5][6][7] H + accumulates inside the crevice with time, which causes depassivation, followed by active dissolution of the steel surface.…”

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confidence: 99%

“…[13][14][15][16][17][18][19][20][21][22][23][24] In the passive dissolution mechanism, which was described by Oldfield and Sutton et al, [4][5][6][7] H + accumulates inside the crevice with time, which causes depassivation, followed by active dissolution of the steel surface. In the IR-drop mechanism, which was described by Pickering et al, [8][9][10][11][12] when the electrode potential difference in a crevice mouth and a deep position becomes sufficiently large, the lower electrode potential inside the crevice reduces the stability of passivity. In the metastable pitting mechanism, [13][14][15][16][17][18][19][20][21][22][23][24] Stockert and Böhni et al suggested that crevice geometry stabilizes the initiation of metastable pits inside a crevice, and that the corrosion morphology changes from pitting to general dissolution inside the crevice.…”

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confidence: 99%

Sudden pH and Cl⁻ Concentration Changes during the Crevice Corrosion of Type 430 Stainless Steel

Matsumura

Nishimoto²,

Muto³

et al. 2022

J. Electrochem. Soc.

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To determine whether large sudden pH and Cl − concentration changes occur during the crevice corrosion of Fe-16Cr, as in the case of Fe-18Cr-10Ni-5.4Mn, simultaneous measurement of the pH and Cl − concentration was performed in 0.01 M NaCl (pH 3.0). The corrosivity of the crevice solution was different before and after crevice corrosion initiation, and the sudden changes in the pH and Cl − concentration inside the crevice were the same as those for Fe-18Cr-10Ni-5.4Mn. The incubation period was characterized by weak acidification (pH 1.6−2.0) and a small accumulation of Cl − (0.1−0.3 M). The growth period was characterized by strong acidification (pH ≤ 1.0) and a large accumulation of Cl − (≥1.0 M). At the crevice corrosion initiation site, a metastable pit was observed and a S signal was detected from the residual in the pit. It can be concluded that the crevice corrosion of Type 430 stainless steels is initiated by Cl − , which generates metastable pitting at sulfide inclusions. The effect of the electrode potential on the pH and Cl − concentration was investigated in 0.01 M NaCl from −0.05 to 0.1 V. No effect of potential was observed during both the crevice corrosion incubation and growth periods.

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Electrochemical evaluation of crevice corrosion of 430 ferritic stainless steel using the microcapillary tube technique

Cited by 11 publications

References 11 publications

A Crevice Corrosion Model for Biomedical Trunnion Geometries and Surfaces Feature

A Crevice Corrosion Model for Biomedical Trunnion Geometries and Surfaces Feature

Electrochemical investigations on crevice corrosion of a martensitic stainless steel in a thin-layer cell

Sudden pH and Cl⁻ Concentration Changes during the Crevice Corrosion of Type 430 Stainless Steel

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Electrochemical evaluation of crevice corrosion of 430 ferritic stainless steel using the microcapillary tube technique

Cited by 11 publications

References 11 publications

A Crevice Corrosion Model for Biomedical Trunnion Geometries and Surfaces Feature

A Crevice Corrosion Model for Biomedical Trunnion Geometries and Surfaces Feature

Electrochemical investigations on crevice corrosion of a martensitic stainless steel in a thin-layer cell

Sudden pH and Cl− Concentration Changes during the Crevice Corrosion of Type 430 Stainless Steel

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Sudden pH and Cl⁻ Concentration Changes during the Crevice Corrosion of Type 430 Stainless Steel