The mechanism of influence of normal and tangential stresses on the adhesion strength of the epoxy composite filled with Ag2CO3 was investigated. The optimum filler content was determined for the formation of coatings with maximum values of adhesion strength for detachment and shear (q=0,500 parts): σа=40,2 MPa, of shear – τ=12,59 MPa, σsh=2,15 MPa. The mechanism of Ag2CO3 impact on the physicomechanical properties of epoxy composites was investigated. For the formation of the matrix with improved physicomechanical properties the optimum content of the carbonate Argentum is q = 0,500…1,000 parts. Such material is characterized by the following properties: fracture stress of bending σb=69,42…120,41 MPa, modulus of bending elasticity – E=3,39 GPa, impact strength – a=15,30 kJ/m2. The fracture surface of epoxicomposite materials with different content of Ag2CO3 was investigated by the method of optical microscopy. The needle formations were identified which indicate the increase of the viscosity of the system, resulting the improvement of physicomechanical properties of the material.