Prediction of Stress Corrosion Cracking Susceptibility of Stainless Steels Based on Repassivation Kinetics

Kwon, Hyuk‐Sang; Cho, EunAe; Yeom, Kyeong-Ho

doi:10.5006/1.3280519

Cited by 66 publications

(72 citation statements)

References 14 publications

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“…It also agrees with the effect of alloying elements on the rate of the current change during the active-passive transition in Fig. 4 as well as the precious results on the effects of alloying elements on repassivation rate [21,[29][30][31]. In the meanwhile, cBV in the neutral pH solution was more sensitive to the alloying elements than in the acidic solution as listed in Table 2 though the trends in cBV with the alloying elements in the neutral pH solution are the same as those in the acidic solution in Fig.…”

Section: Resultssupporting

confidence: 77%

“…In order to confirm the proportional relationship between cBV and protectiveness [21], the protectiveness of the passive film, whose thickness is inversely proportional to the protectiveness [34], was determined by measuring passive film thickness as shown in Fig. 9.…”

Section: Evaluation Of Protectiveness By Measuring Passive Film Thickmentioning

confidence: 99%

“…Burstein [20] reported that the passive films of type 304 and type 316 grew in conformity with the high field conduction model. Furthermore SCC susceptibility is determined by repassivation kinetics between 10 and 100 milliseconds after film rupture [21]. Hence, the high field conduction model is described in more details as follows.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of tungsten and nickel on repassivation rate of stainless steels in chloride solution by electrochemical method

Kim¹,

Kim²,

Kwan³

2006

Materials & Corrosion

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The recent development of the method for analyzing repassivation rate by a rapid scratch test and high field conduction model makes it possible to predict SCC susceptibility more quantitatively but it is impossible to distinguish the repassivation rates with a little difference due to the inaccurate measurement of the scratched surface area. In addition, the electrochemical method previously reported as a method to remove passive film also makes it difficult to analyze repassivation rate by the high conduction model due to hydrogen evolution at the removing process. This study is to propose the new test conditions based on an electrochemical method and to get a better understanding of alloying elements on the repassivation rate of stainless steels. From the scratch test and the proposed electrochemical (potential step chronoamperometry: PSC) test, the function of nickel and tungsten affecting the repassivation rate is due to blocking the passivation by metal not participating in the formation of passive film and stabilizing the film by molybdenate (MoO 4 2-) with accelerating the dissolution rate of iron by tungsten, respectively. In addition, the PSC test can be approved a technique for simulating the repassivation rate by the comparison of the results from two tests. Finally, the relationship between protectiveness of passive film and repassivation rate was mentioned.

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Section: Resultssupporting

confidence: 77%

Section: Evaluation Of Protectiveness By Measuring Passive Film Thickmentioning

confidence: 99%

See 1 more Smart Citation

Effects of tungsten and nickel on repassivation rate of stainless steels in chloride solution by electrochemical method

Kim¹,

Kim²,

Kwan³

2006

Materials & Corrosion

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“…The number of works concerning research into these aspects is considerable, with emphases in fracture morphology and electrochemical aspects within which the passive film and its rupture have been considered of utmost importance [1][2][3][4][5]. However, in spite of the vast amount of research efforts, the understanding of stress corrosion phenomena demands further investigation.…”

Section: Introductionmentioning

confidence: 99%

Semiconductor Electrochemistry and Localised Corrosion

Rangel¹,

Belo²

2004

Port. Electrochim. Acta

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In the present work, the electronic structure of the passive film formed on austenitic stainless steel of the 304 type and its implications on the initiation of localised corrosion are investigated taking into account concepts developed in semiconductor physics and semiconductor electrochemistry. Capacitance measurements (Mott-Schottky approach), show that the susceptibility of AISI 304 stainless steel to stress corrosion cracking (SCC) in boiling chloride containing aqueous solutions is closely linked to the formation of a chromium rich passive oxide film with p-type semiconductivity. A small polarisation is required to drastically change the electric field at the film-electrolyte interface, as a consequence of the high doping level of the passive film. Initiation of the SCC phenomenon is described as the consequence of localised changes in the semiconductive properties of the passive film.

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“…The factor α was the slope determined from log i(t) versus log t plot, which represented repassivation rate and approached to 1 7,8) . It was found that the film initially nucleated and grew according to the place exchange model 9,10) , and then grew according to the high electric field ion conduction model, in which log i(t) was linearly proportional to 1/q(t), where q(t) was charge density flowing from the bare surface [11][12][13] . This model assumed that all of current transients only contributed to passive film formation.…”

Section: Introductionmentioning

confidence: 99%

The Kinetics of Anodic Dissolution and Repassivation on 316L Stainless Steel in Borate Buffer Solution Studied by Abrading Electrode Technique

Xu¹,

Sun²,

Yu³

et al. 2015

Corrosion Science and Technology

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The capacity of passive metal to repassivate after film damage determines the development of local corrosion and the resistance to corrosion failures. In this work, the repassivation kinetics of 316L stainless steel (316L SS) was investigated in borate buffer solution (pH 9.1) using a novel abrading electrode technique. The repassivation kinetics was analyzed in terms of the current density flowing from freshly bare 316L SS surface as measured by a potentiostatic method. During the early phase of decay (t < 2 s), according to the Avrami kinetics-based film growth model, the transient current was separated into anodic dissolution (i diss ) and film formation (i film ) components and analyzed individually. The film reformation rate and thickness were compared according to applied potential. Anodic dissolution initially dominated the repassivation for a short time, and the amount of dissolution increased with increasing applied potential in the passive region. Film growth at higher potentials occurred more rapidly compared to at lower potentials. Increasing the applied potential from 0 V SCE to 0.8 V SCE resulted in a thicker passive film (0.12 to 0.52 nm). If the oxide monolayer covered the entire bare surface (θ=1), the electric field strength through the thin passive film reached 1.6 × 10 7 V/cm.

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Prediction of Stress Corrosion Cracking Susceptibility of Stainless Steels Based on Repassivation Kinetics

Cited by 66 publications

References 14 publications

Effects of tungsten and nickel on repassivation rate of stainless steels in chloride solution by electrochemical method

Effects of tungsten and nickel on repassivation rate of stainless steels in chloride solution by electrochemical method

Semiconductor Electrochemistry and Localised Corrosion

The Kinetics of Anodic Dissolution and Repassivation on 316L Stainless Steel in Borate Buffer Solution Studied by Abrading Electrode Technique

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