It is showed that an increase of temperature and duration of holding time at termodiffuznom galvanizing in powder medium garttsink-Al2O3 leads to the layer thickness and the size of the samples growth. Coating thickness increases due to δ1k-compact phase having a fine crystalline structure, is in the range of 400-500 °C, with the most intensive growth of layer inside the sample due to the increase of δ1k-compact phase after 3 h-exposure.