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- W2065851656 endingPage "20140001" @default.
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- W2065851656 abstract "Mass balance between metal and electrolytic solution, separated by a moving interface, in stable pit growth results in a set of governing equations which are solved for concentration field and interface position (pit boundary evolution). The interface experiences a jump discontinuity in metal concentration. The extended finite-element model (XFEM) handles this jump discontinuity by using discontinuous-derivative enrichment formulation, eliminating the requirement of using front conforming mesh and re-meshing after each time step as in the conventional finite-element method. However, prior interface location is required so as to solve the governing equations for concentration field for which a numerical technique, the level set method, is used for tracking the interface explicitly and updating it over time. The level set method is chosen as it is independent of shape and location of the interface. Thus, a combined XFEM and level set method is developed in this paper. Numerical analysis for pitting corrosion of stainless steel 304 is presented. The above proposed model is validated by comparing the numerical results with experimental results, exact solutions and some other approximate solutions. An empirical model for pitting potential is also derived based on the finite-element results. Studies show that pitting profile depends on factors such as ion concentration, solution pH and temperature to a large extent. Studying the individual and combined effects of these factors on pitting potential is worth knowing, as pitting potential directly influences corrosion rate." @default.
- W2065851656 created "2016-06-24" @default.
- W2065851656 creator A5032350542 @default.
- W2065851656 creator A5085022394 @default.
- W2065851656 date "2014-08-08" @default.
- W2065851656 modified "2023-09-26" @default.
- W2065851656 title "An extended finite-element model coupled with level set method for analysis of growth of corrosion pits in metallic structures" @default.
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- W2065851656 doi "https://doi.org/10.1098/rspa.2014.0001" @default.
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