International audienceA numerical model was developed to simulate the plasma electrolytic oxidizing of aluminium and magnesium alloys in direct current galvanostatic mode. The model based on the analysis of acoustic emission assumes that during plasma oxidizing the dielectric breakdown is due to the increase of electric field appearing at the barrier layer situated at the bottom of pores. The model simulates the pore growth by use of an equivalent resistive network. This very simple model includes nevertheless no less than eleven ill-known physical parameters leading to a difficult calibration. Though the model was not yet calibrated, it reproduced fairly well the experimental results, particularly the beginning of anodization. The numerous assumptions made to build the model were confirmed by the preliminary results. The particularly difficult calibration of this model is in progress and will be published soo
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