Abstract
The study of the surface of sheet metal with polymer coatings by optical microscopy method showed that it consists of grooves which collect in star-like condensations on the surface. When comparing images obtained by an optical microscope and the method of scanning probe microscopy, we observed scale invariance.Therefore, the distribution of defects on the surfaces of the polymer coatings of the metal sheet is neither deterministic nor purely random, and so this distribution is fractal in nature. To study geometric and optical properties of textured coatings, we used a three-dimensional anisotropic model based on the Julia set. We developed the method which allows determining the values of the parameters of this model for a number of samples of coatings of steel sheet obtained under different conditions of their formation. The fractal dimension of objects obtained on the base of this model is determined. The scattering of electromagnetic waves from the surface of polymer coatings was studied by means of the Kirchhoff method.
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