Аннотация:The effect of a rapidly diffusing medium, the nature of the polymer matrix, the filler particle size, and the nature of the dispersed filler on the change in the size and structure of the reinforcing frame of the dispersed filler of epoxy composites is investigated. It is shown that the local X-ray spectral analysis method is informative for conducting accelerated one-day diffusion tests at room temperature for compositions of industrial anticorrosive coatings. The results obtained can serve as a physicochemical basis for explaining the relationship between the structure of epoxy composites and the properties of the anticorrosive coatings obtained from them.