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Purpose: Defining the regularities in X-ray radiation attenuation, which characterize composite coatings based on barium sulfate and the aqueous alkaline sodium silicate solution, depending on the thickness of the layer of such coatings deposition.  Material and methods: The experiment consisted in the manufacture of experimental samples of composite coatings based on barium sulfate and the aqueous alkaline solution of sodium silicate and testing of the manufactured experimental samples. Tests of the manufactured experimental samples of composite coatings were carried out using UPR-AT300 calibration X-ray unit, DKS-AT5350 precision dosimeter in combination with a TM23361 ionization chamber (PTW Freiburg), attorney at Mendeleev All-Russian Research Institute of Metrology (Russia) on the state standards of the Russian Federation.  Results: It has been established that by increasing from 0.5 mm to 2.0 mm of the thickness of the deposition layer of these coatings, it is possible to ensure an increase of 2.0‒3.5 times of X-ray attenuation ratio values in the range of average energies 30.0‒60,0 keV.  Conclusion: The obtained results are recommended for use in solving problems related to the shielding of premises (X-ray rooms) or areas of premises (inspection zones at airports) in which X-ray sources are located.

Study of the Influence of the Layer Thickness of Composite Coatings Based on Barium Sulphate on the Attenuation of X-Ray Radiation