Abstract
The unusual behavior of halide ions and some organic additives in acidic solutions during anodic polarization has been observed and reported in the literature. In our paper this behavior is studied on ARMCO iron in 0.5 M H2SO4 solutions in the presence of iodide ions. Based on an earlier conception, a model is developed for the description of sorption processes during polarization, which allows for the removal of adsorbed inhibitor particles together with the dissolving metal atoms. The effect of the permanently changing metal surface is analyzed to describe the entire polarization process, and as a result, our model is more suitable for the description of measured polarization behavior. The model predicts hysteresis and the fact that the measured polarization curves are strongly dependent on all parameters.
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