Development of the Fundamental Multiphysics Analysis Model for Crevice Corrosion Using a Finite Element Method

Tachibana, Masahiko; Wada, Yoichi; Arakawa, Takayuki; Kikuchi, Yoshiharu; Seto, Takehiro

doi:10.1007/978-3-319-68454-3_39

Cited by 1 publication

(1 citation statement)

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“…Computational models output chemical speciation, the evolution of various electrolyte properties such as pH, conductivity, and, more importantly, potential and current density profiles, which ultimately can determine the corrosion rate. Models for crevice corrosion are of two classes: 1) the first class uses a stationary domain, where the governing equations (usually mass transport and electrostatics) are solved within a fixed time-invariant domain (of the gap only) [6][7][8][9][10][11][12][13][14][15][16][17][18]. The second class of crevice corrosion models considers evolving geometry, where the anodic dissolution changes the shape of the crevice in time as the corrosion progresses [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A Peridynamic Model for Crevice Corrosion Damage

Jafarzadeh¹,

Zhao²,

Shakouri³

et al. 2021

Preprint

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A new peridynamic (PD) model for crevice corrosion damage is introduced and cross-validated with experimental results reported in the literature. The model defines a simple metal ion concentration-dependent corrosion rate along the metal-electrolyte interface. Crevice problems have ratios of gap-to-length of 1/100 or lower. To increase the computational efficiency when having a domain with an extreme aspect ratio, the PD formulation with spherical horizons is modified to accommodate arbitrary-shape horizons. The model is validated against experimental results on immersed bolted washers. The PD simulations predict the observed corrosion kinetics, and the deepest corrosion trenches form at a critical distance from the mouth of the crevice. The location of the most severe corrosion attack does not have to be specified as an input. Instead, it results directly from solving the problem with PD. The evolution of crevice corrosion damage is autonomous in PD, and only the geometry, initial, and boundary conditions control the evolution of the corrosion process.

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