Investigation of gas dynamic coatings based on electroerosive Aluminum powders

Purpose. Study of the composition, structure, adhesive strength and corrosion resistance of gas-dynamic coatings based on electroerosion Aluminum powders. Methods. The object for applying gas dynamic coatings were Aluminum nickels with a diameter of 40 mm and a thickness of 5 mm. Electroerosion Aluminum powder materials were obtained from waste electrical wire on equipment developed and patented by employees of the Southwest State University Scientific and Educational Center. Gasdynamic coatings were applied on the DIMET-405 installation. To achieve the goal set in this paper, the corresponding tasks were solved using modern research equipment. Results. Based on experimental studies aimed at studying the composition, structure and corrosion properties of gas dynamic coatings based on electroerosive Aluminum powders, the following has been established: the coating is formed uniformly, without cracks and in the absence of discontinuities; the elemental composition of the gas dynamic coating includes the following basic elements: Al (64.5%), Si (17.6%); C (10.8%); O (6.3%), Fe (0.5%); Mn (0.3%); the phase composition of the gas dynamic coating includes the following main phases: Al, Al2O3 and Al(OH)3; The hardness of the gas-dynamic coating is on the order of 105.4 NV; the coefficient of friction of the coatings on the 500 m friction path is on the order of 0.35; higher indicators of adhesive strength and corrosion resistance of gas-dynamic coatings have been experimentally established compared with those of the substrate. Conclusion. High economic efficiency indicators of the developed technology for the restoration and hardening of gasdynamic coatings based on electroerosive Aluminum powders are associated with resource conservation and import substitution.