Numerical Investigation of Critical Electrochemical Factors for Localized Corrosion using a Multi-species Reactive Transport Model
| Autor: | Xiangming Sun, Ravindra Duddu, Robert G. Kelly, Jayendran Srinivasan |
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| Rok vydání: | 2020 |
| Předmět: |
Chemical Physics (physics.chem-ph)
Materials science 020209 energy General Chemical Engineering Metallurgy FOS: Physical sciences 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Electrochemistry Corrosion Physics - Chemical Physics 0202 electrical engineering electronic engineering information engineering Multi species Pitting corrosion General Materials Science 0210 nano-technology Polarization (electrochemistry) Current density Dissolution Electrode kinetics |
| DOI: | 10.48550/arxiv.2008.04280 |
| Popis: | A multi-species reactive transport model based on the sequential non-iterative approach is employed to investigate two major stages involved in artificial pit experiments of stainless steel: I. Stable dissolution under a salt film and II. Film-free dissolution that transitions to repassivation. Data of current density and electrical potential obtained from rapid polarization scans of pits with different depths are utilized to calibrate the elapsed time and the electrode kinetics of each stage. The local chemistry near the base of pits at different temperature and bulk concentrations is simulated to determine several critical electrochemical factors at saturation and repassivation. |
| Databáze: | OpenAIRE |
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