Effects of applied potential on stable pitting of 304 stainless steel

Tian, Wenming; Li, Songmei; Du, Na; Chen, Sibing; Wu, Qunying

doi:10.1016/j.corsci.2015.01.034

Cited by 81 publications

(33 citation statements)

References 56 publications

(219 reference statements)

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“…5 gives an exponential increase of the mean value of the pit cover thickness varying from 10 µm after 10 min of propagation to about 25 µm after 10 hours of propagation. Experimentally, Tian et al [16] have found a pit cover thickness of about 12 µm after 5 min of propagation for a 304 stainless steel in bulk of 1.3 M NaCl, which is in agreement with the values obtained in this work and which allows to ascribe the discrepancy between the two techniques used for monitoring the current corresponding to the pit propagation to the fact that the volume of the cover has to be taken into account. Eqs.…”

Section: Generation Of Covered and Open Single Pitsupporting

confidence: 79%

“…4b. Interestingly, the cover had only one or two centered large holes, in contrast with the lacy like structure described in the literature for the 304 stainless steel in 1 M NaCl at 0.2 V/MSE [18;21] but in agreement with the cover found for some Depth / µm stable pits on 304 stainless steel in 1.3 M NaCl at -0.4 V/MSE [16]. We believe that the lace did not develop due to the presence of the glass microcapillary in the close vicinity of the substrate.…”

Section: Generation Of Covered and Open Single Pitcontrasting

confidence: 35%

“…This device mimicked the pit propagation by dissolving entirely [14;15] or partially [16] the wire in a high concentrated chloride solution. The generated 1D single pit allows the evaluation of its depth evolution, but this setup was criticized in the literature [17] because of the geometrical difference between an artificial and a real pit, and also because the walls inside the pit were not conductive.…”

Section: Introductionmentioning

confidence: 99%

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On the Propagation of Open and Covered Pit in 316l Stainless Steel

Heurtault

Robin

Rouillard

et al. 2016

Electrochimica Acta

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Pitting corrosion on stainless steel has been widely studied during the last decades, but since it is a stochastic process, it remains difficult to analyze experimentally such a phenomenon. In this work, reproducible single pits were performed on 316L steel by using an experimental setup based on the use of a glass microcapillary to locally supply chloride ions on the steel surface in order to characterize the pit propagation. This original approach allowed obtaining new results about pit propagation. Indeed, it was possible to control the presence of a metallic cap recovering the pit by adjusting the experimental parameters (potential -chloride to sulfate ratio -temperature). The presence of this cover was shown to be an important issue concerning the propagation mechanism.It was also possible to study the evolution of both the pit depth and the pit diameter as a function of various parameters. Then, based on the simulation of the current densities at the pit bottom and at the pit aperture, a special attention has been paid for the investigation of the local propagation mechanism.

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Section: Generation Of Covered and Open Single Pitsupporting

confidence: 79%

Section: Generation Of Covered and Open Single Pitcontrasting

confidence: 35%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the Propagation of Open and Covered Pit in 316l Stainless Steel

Heurtault

Robin

Rouillard

et al. 2016

Electrochimica Acta

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“…In crevice corrosion system involving SS-304, though, it is generally agreed that a varied concentration of chloride is notorious for causing components failure, a clear information on the relationship of its interactions with other geometrical and operational factors is still lacking [ 3,6,10,11,12]. Therefore, the operating conditions within the design criteria that control crevice corrosion in chloride containing environments need to be studied via suitable combinations of experimentation and modelling to determine the optimal values of these parameters [11,12] so as to eliminate or reduce the occurrences of unanticipated failures in processing industries.…”

Section: Introductionmentioning

confidence: 99%

“…Stainless Steel 304 (SS-304) has extensive industrial usage due to its good mechanical and corrosion resistance properties [1,2,3]. In spite of wide industrial use of SS-304, its crevice corrosion failures in chloride containing environments are frequently reported [4,5,6,7] in process equipment and installations whose fabrications and assembly involve unavoidable creviced geometry.…”

Section: Introductionmentioning

confidence: 99%

Factorial Design based Optimisation of Crevice Corrosion for Type 304 Stainless Steel in Chloride Solutions

Ogunleye

Adeniyi

Durowoju

2016

Advances in Materials Science

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The effects of chloride concentration, creviced scaling factor and immersion time on the percentage area and maximum depth of attack for Type 304 stainless steel (SS304) in chloride solutions were investigated. The crevice assembly comprised of coupon (SS-304), polytetrafluoroethylene (crevice former) and fasteners (titanium bolt, nut and washers). The full immersion tests were based on ASTM G-78 using full factorial design to study the effects of chloride concentration (1.5, 3.0 and 4.5 w/w%), crevice scaling factor (8, 16 and 24) and immersion time ( 15, 30 and 45 days) on the percentage area of attack (Y 1 ) and maximum depth of attack (Y 2 ) of SS-304. Data obtained was used to develop and optimize the models of Y 1 and Y 2 in terms of the three factors using Response Surface Methodology (RSM). The R 2 of Y 1 and Y 2 were 0.98 and 0.91, respectively. The minimum Y 1 (5.63%) and Y 2 (3.32x10 -7 mm) were obtained at 4.5% chloride concentration, 20 scaling factor and 15 days immersion time. The predicted optimal conditions agreed with the experimental results for validation with a maximum absolute relative error of 5.75%.

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Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel

Radojković,

Jegdić,

Pejić

et al. 2023

Materials & Corrosion

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The influence of welding current and nitrogen content in argon shielding gas on the resistance of the welded joint (weld metal and heat‐affected zone [HAZ]) of the stainless steel X5CrNi18‐10 to the formation and growth of pits was investigated. Also, the susceptibility of the welded joint to intergranular corrosion was examined. Pitting corrosion resistance indicators were determined based on anodic potentiodynamic polarization measurements in NaCl + Na2SO4 solution, while susceptibility to intergranular corrosion was determined by the potentiokinetic method with a double loop (DL EPR). SEM/EDS was used to analyze the microstructure. It has been shown that higher nitrogen content in shielding gas leads to an increase in the resistance of welded joints (weld metal and HAZ) to the pit formation. However, an improvement in the resistance to the pit formation leads to a decline in the resistance of the welded joint to pit growth. An explanation of this phenomenon is proposed. Also, it was shown that the increase of the welding current increases the susceptibility of the welded joint to intergranular corrosion, while the higher nitrogen content has no effect.

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Effects of applied potential on stable pitting of 304 stainless steel

Cited by 81 publications

References 56 publications

On the Propagation of Open and Covered Pit in 316l Stainless Steel

On the Propagation of Open and Covered Pit in 316l Stainless Steel

Factorial Design based Optimisation of Crevice Corrosion for Type 304 Stainless Steel in Chloride Solutions

Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel

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