The production of corrosion alloy by self-propagating high-temperature synthesis

The subject of research: Self-propagating high-temperature synthesis (SHS) is an energetically low-cost method for obtaining materials with desired properties. The purpose of research: Development and approbation of the method of self-propagating high-temperature synthesis. Methods and objects of research: For the synthesis of a corrosion-resistant material, a thermite mixture of Al (75 %) and Fe2O3 (25 %) and the addition of MoO3 with a variable mass fraction of 10 %, 15 %, 20 %, 25 % of thermite were taken. The composition and structure of the synthesized material were determined by XRD and metallography methods. Based on the properties of the physical properties of the obtained material (porosity, electrical conductivity) and its phase composition (MoO2, Al2O3, FeMoO4), samples obtained with a 15 % addition of MoO3 were selected for testing for corrosion resistance. Results of research: The paper presents the results of approbation of obtaining a corrosion-resistant material by the SHS method. Conducted tests for corrosion resistance established: the rate of continuous corrosion of the synthesized material (MoO3 15 %) was 0.2 mm / year, which is close in value to corrosion-resistant steels; high resistance of the synthesized material to technical salt when tested for 14 days with a concentrated solution of the reagent 0.18 ml * eq / l. The listed properties of the synthesized material confirm the possibility of obtaining corrosion-resistant materials by the SHS method, including those for operation in the Arctic.