A critical crevice solution and IR drop crevice corrosion model

Kennell, Glyn; Evitts, Richard W.; Heppner, Kevin L.

doi:10.1016/j.corsci.2008.02.020

Cited by 80 publications

(44 citation statements)

References 20 publications

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“…It was found that the numerical solution of this model was relatively computationally inexpensive and stable when compared with other electrolyte transport models the authors have worked with [1,6]. A notebook PC equipped with a 1.5 GHz Intel Celeron M processor with 504 MB of RAM was able to solve the model presented here in approximately ten hours.…”

Section: Validation and Discussionmentioning

confidence: 98%

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A universal multi-dimensional charge and mass transfer model

Kennell

Evitts

2010

WIT Transactions on Engineering Sciences

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A new approach has been developed for modelling the transport of charge and mass through electrolytes. This approach utilizes a dynamically computed electric field that contributes to the transport of charged species in much the same way a flow field contributes to the transport of mass. Since a multidimensional electric field is computed, the effects of this field on redox reactions occurring in the electrolyte or at the interface of an electronic and ionic conductor can be modelled. Transport of species due to diffusion and convection is also considered, and the overall transport system is modelled using a control volume technique with a modified Peclet number. Electroneutrality and the conservation of species are incorporated into the model. This method produces a universal model capable of predicting one, two, or three-dimensional mass and charge transport for electrochemical phenomena where macroscopic anodic and cathodic couples exist. This model has the potential to simulate forms of localized corrosion and energy storage and generation applications such as batteries and fuel cells. The theoretical development and validation of this new model for a two dimensional case study is presented.

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Section: Validation and Discussionmentioning

confidence: 98%

“…However, in this paper the fluxes in eqn (7) include the migration terms expressed by eqns (5) and (6). Thus, the numerical techniques that have evolved during the development of the Control Volume method may be utilized to solve convective-diffusive problems with electromigration.…”

Section: Solving the Transport Equationmentioning

confidence: 99%

A universal multi-dimensional charge and mass transfer model

Kennell

Evitts

2010

WIT Transactions on Engineering Sciences

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“…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. Hu et al [6] explained that metals in the passive system like SS-304 in sodium chloride solution and carbon steels in chloride containing bicarbonate solution would experience crevice corrosion when crevice opening ranges between 0.1mm and 0.5mm.…”

Section: Introductionmentioning

confidence: 99%

“…These were based on process variable that are non-controllable and hence, cannot be implemented in design and operation for controlling crevice corrosion [4,5]. In all of these approaches, while considering the overall process, the likelihood, timing, and rate of attack were not considered.…”

Section: Introductionmentioning

confidence: 99%

“…In this present study, full factorial design and Response Surface Methodology (RSM) were used to evaluate effects of chloride concentration, crevice scaling factor and immersion time on the rate of crevice corrosion of SS-304 in chloride containing environments for the purpose of minimising its occurrence. These factors chosen are critical factors of crevice corrosion of SS 304 in chloride containing environments [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

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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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