METHODOLOGY OF OBTAINING CHROMIUM CARBONYL COMPLEXES AND DEVICES USED IN OBTAINING THEM

Abstract

The development of modern technology and the long-term processing of materials and constructions used in high temperature conditions make great demands. It is very important to obtain hard-melting metals that meet these requirements. In nature, the scarcity of hard-to-melt metals and their high cost force us to find other more efficient ways. One such solution is the application of hard- -melt metals in the form of thin layers or coatings on metals or structures. For to this purpose, carbonyl compounds of hard-to-melt metals are widely used in technology recently. Carbonyl compounds have important properties, one of which is that they act as raw materials for obtaining coatings and layers through thermal decomposition. However, some difficulties arise in obtaining chromium coatings based on chromium carbonyl complexes with organic ligands. In order to overcome such difficulties, the synthesis methodology of two chromium-based complex compounds with easy volatility and low decomposition temperature, which are used in the production of corrosion-resistant coatings, and the temperature range in their decomposition limits, physical chemical structure parameters have been determined. The research found that both chromium carbonyl complexes obtained by synthesis form chromium coatings with high adhesion on the metal carrier and increase their corrosion resistance. Chromium carbonyl complexes can serve as technologically favorable raw materials for obtaining the necessary chromium coating during the decomposition of groups at a very low temperature range (100-150 C) without creating additional pressure. Both synthesized complex compounds are raw materials for obtaining corrosion-resistant coatings on weld seams of 09Г2С steel. The use of these complexes as active fillers in abrasive metallurgy has also been determined. Keywords: Chromium, solvent, toluene, mesethylene, infrared spectrum, chromium carbonyl, complex, melting, decomposition, coating, heating, solution.