Aluminum samples of wire were exposed at outdoor atmospheric marine-coastal and rural environments, and study them using scanning electron microscopy.

The concepts of fractal geometry and self-similarity were used in this study for evaluation of the pitting corrosion as a function of time, making a statistics of the frequency of appearance of pits versus the area occupied by them.

The data showed that the distribution of the pits follows a power law, which the exponent of self-similarity varied between 1.7-1.9.

The progress of pits in area and frequency is more pronounced in time in the marine-coastal atmosphere, compared to pitting developed in rural- urban one.