Fractal Dimension Analysis of Aluminum Corrosion Roughness by Electrochemical and Optical Methods

Abstract

Background: : Fractal dimension is a versatile method to study and evaluate corrosion from the point of view of metallic conditions, namely: surface roughness, electrochemical measurements and microscopy images. Aluminum corrodes at different rates, under different pH electrolytes with or without the presence of chloride ions. Methods:: In this work, corrosion and the roughness for aluminum corrosion at different pH electrolytes: acid, with and without chlorides, neutral and basic solutions, It was measured using electrochemical and optic techniques. Results:: The results of Electrochemical Impedance Spectroscopy (EIS) and Noise Measurements (ENM), Digital Holographic Microscopy (DHM), Scanning Electron Microscope (SEM) micrographs and their respective Fractal Dimension analysis were obtained. Conclusions:: For the different experimental techniques and conditions, fractal dimension were presented, reflecting the surface condition of aluminum corrosion as a function of pH solution.