Study of Pitting Morphology Fractal Characteristic of Corroded Surface of 304 Stainless Steel in FeCl_3 Environment

摘要

Experiments were performed to study the pitting corrosion morphology of 304 stainless steel exposed to FeCl_3 environments and SEM micrographs of the pitting corrosion morphology were obtained. The image processing technique combining with the fractal method was employed to analyze these pitting corrosion images and the self-similarity of pits morphology was observed. It indicates that fractal characteristics exist in pitting corrosion of 304 stainless steel. The self-similarity and complexity of the pitting morphology phenomenon were described in terms of fractal dimension which can also be an important parameter related to characterize pitting morphology qualitatively and quantitatively.