This paper investigates a hypothesis for understanding how the substrate texture influences the adhesive strength. A surface-scale fractal analysis is carried out on measured surface textures obtained from various metallic substrate materials. The results of these area-scale analyzes are correlated with the adhesive tensile strength of the finished coating. The results show that scale-considering fractal parameters predict bond strength better than average roughness, and that they support a hypothesis that relates bond to available surface area at a given scale. Paper includes a German-language abstract.

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