Statistical study of the critical pitting temperature of 22-05 duplex stainless steel

Peguet, Lionel; Gaugain, A.; Dussart, Capucine; Malki, B.; Baroux, B.

doi:10.1016/j.corsci.2012.03.025

Cited by 39 publications

(41 citation statements)

References 29 publications

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“…The stable pit formed at 0.05 V (SCE) had a relatively integrated cover. This cover did not appear to be like the typical lacy covers that are observed in many works [31][32][33][34][35][36]42], and only two small holes existed in the center of this metal cover. Some small cracks were also visible, but they were not formed during the pit stable propagation but by washing with fluid water.…”

Section: Morphological Characteristics Of Pit Mouthmentioning

confidence: 75%

“…Many circular symmetry holes were generated on the metal cover at 0.25 V (SCE). This metal cover had a typical lacelike appearance as mentioned in other work [31][32][33][34][35][36]42], and was mainly undermined from below. Metastable pits also nucleated on the upper surface.…”

Section: Morphological Characteristics Of Pit Mouthmentioning

confidence: 84%

“…This mechanism has successfully illustrated the initiation and propagation of corrosion pits, and has been proven by many researchers [18][19][20][21]42]. Therefore, the following calculations are based on the ions diffusion mechanism.…”

Section: Chemical Compounds Of Internal Electrolyte Of Stable Pitsmentioning

confidence: 96%

“…The CPT is the lowest temperature at which stable pit growth is possible. It is affected by the environment, grain size and phase composition of metal, and the electrode surface state such as surface roughness [41][42][43][44]. The pit cavity shape obtained below the CPT is significantly different from the pit obtained above the CPT.…”

Section: Introductionmentioning

confidence: 91%

“…Further into the pit, the concentration of aggressive ions can still maintain metal anodic dissolution. Further dissolution then undercuts the surface sideways and metal covers (lacy covers) are formed over the pit mouth [31][32][33][34][35][36][37][38][39]42]. Hole or holes, which formed at the pit initiation sites, exist on the metal cover, and act as diffusion channels to sustain pit growth.…”

Section: Reasons For Geometrical Changes For Stable Pitsmentioning

confidence: 99%

See 4 more Smart Citations

Effects of applied potential on stable pitting of 304 stainless steel

Tian

et al. 2015

Corrosion Science

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Section: Morphological Characteristics Of Pit Mouthmentioning

confidence: 75%

Section: Morphological Characteristics Of Pit Mouthmentioning

confidence: 84%

Section: Chemical Compounds Of Internal Electrolyte Of Stable Pitsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 91%

Section: Reasons For Geometrical Changes For Stable Pitsmentioning

confidence: 99%

See 3 more Smart Citations

Effects of applied potential on stable pitting of 304 stainless steel

Tian

et al. 2015

Corrosion Science

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Study on the Influence of Etchant Composition and Etching Process on the Precision of Stainless‐Steel Microchannel and Etching Mechanism

Wei,

Zhu,

Jia

et al. 2024

Adv Eng Mater

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T The chemical etching method has the advantages of high precision and low cost for the preparation of steel surface microchannel, but the composition of the etching solution and the etching process have a great influence on the precision of the microstructure. In this paper, the influence of etching solution composition and the etching time on the etching precision of stainless steel using a mixture of HCl and H2O2 as an etching solution was studied. The reactions and passivation processes that occurred during the etching process were analyzed. The etching mechanism was revealed. The sample prepared with HCl:H2O2=1:2 can obtain better etching precision and high dimensional stability. The amount of lateral erosion and the depth of etching increased with the increase of etching time, resulting in a decrease in the etching factor and precision. Pitting and intergranular corrosion mainly occurred during the etching process, and the loss of metal chloride formed in the process would form holes, which would become rapid diffusion channels for corrosive Cl and O elements, and promote the etching process. The etching reaction formed a passivation film on the surface of the substrate, which reduced the rate of the etching reaction.This article is protected by copyright. All rights reserved.

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A comparative study on potentiodynamic and potentiostatic critical pitting temperature of austenitic stainless steels

Sun

Wang

Jiang

et al. 2017

Materials & Corrosion

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Temperature and potential effect on pitting occurrence of four austenitic stainless steels in 1 M sodium chloride solution are plotted, then the influence of scan rate and chloride concentration on potentiodynamic critical pitting temperature (CPT) are investigated. Basing on the independence and reliability analysis, the potentiodynamic CPT and potentiostatic CPT are compared. To improve the reproducibility of potentiostatic CPT, an elevated potential should be applied. On the other hand, crevice corrosion induced by transpassive etching is clarified, indicating the upper limit of applied potential in potentiostatic test. Consequently, a potential of 800 or 850 mV(SCE) is recommended for austenitic stainless steels. Additionally, regression analysis is carried out to confirm the linear relationship between potentiodynamic CPT and pitting resistance equivalent. K E Y W O R D SCPT, critical pitting temperature, potentiodynamic, potentiostatic, PREN

show abstract

Statistical study of the critical pitting temperature of 22-05 duplex stainless steel

Cited by 39 publications

References 29 publications

Effects of applied potential on stable pitting of 304 stainless steel

Effects of applied potential on stable pitting of 304 stainless steel

Study on the Influence of Etchant Composition and Etching Process on the Precision of Stainless‐Steel Microchannel and Etching Mechanism

A comparative study on potentiodynamic and potentiostatic critical pitting temperature of austenitic stainless steels

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