Highly alloyed alloys, in which expensive chromium and nickel are alloying elements, are widely used as heat-resistant materials. Their total content in heat-resistant alloys reaches 30% or more. However, the life of working parts made of heat-resistant alloys is limited. Moreover, the higher the operating temperature, the shorter it is. This leads to increased costs for maintaining the units in working condition. Examples of such parts are the grate of agglomeration machines, details of boiler plants, roasting, heating, and glass melting furnaces, casting molds, exhaust manifolds of forced automobile engines, etc. In this regard, reducing the cost of heatresistant products, while maintaining their operating characteristics and life, becomes very actuality. One of the promising options to solve it is to manufacture these parts made of high-alloyed heat-resistant aluminum cast iron CHYU22SH (CHYU22SH - standard cast iron). Castings made of cast iron CHYU22SH differ, first of all, by being heat resistance at high temperatures in air (up to 1100°C) and in media containing sulfur, sulfur dioxide, oxides of vanadium, and water vapor. In addition, they can functionally operate as a wear-resistant product having high strength at normal and elevated temperatures. The paper presents the thermal and mechanical properties of casting, as well as the results of microstructure analysis of aluminum cast irons. The results of analyses and tests show that cast iron CHYU22SH can be obtained by casting with long walls of a thickness of 4 mm without external and internal defects. By doing so the castings have a uniform structure, high and stable mechanical properties, as well as lower by ~17-24% weight than similar cast of gray iron. The results of experimental - industrial testing laboratory studies confirm the influence of solidification conditions on the parameters of the structure of cast iron CHYU22SH.

It is generally accepted that the color and performance characteristics of liquid thermal insulation coatings are affected by the combined effect of various climatic factors such as solar radiation, temperature fluctuations, moisture, precipitation and others. This work presents the results of a scientific study of the full-scale exposure of coatings with regard to climatic ageing. Methods have been carried out, such as: spectrophotometry and direct scanning; determining adhesion, determining the adhesion strength of facing and protective coatings; and thermal conductivity and thermal resistance. As the results of the research work have shown, only in situ climatic tests, accompanied by the obligatory recording of the aggressive factors affecting the coating, make it possible to assess changes in the properties of epoxy coatings in full-scale conditions and, consequently, their climatic resistance by the methods of spectrophotometry and direct scanning. The ageing of polymer composites is known to be accompanied by a change not only in elasticity but also in color. Of the epoxy coatings tested, Etal-45M showed the greatest color variation during the in situ climate test. The most decorative resistant coatings are obtained using epoxy resin ED-20 + modified epoxy resin Etal-1440N.

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This article examined the characteristics of zeolites from the Chankanai and Daubabinsk deposits. In the field of water treatment, the purpose of investigating natural zeolite from the Chankanai and Daubabinsk deposits as a sorbent presents new opportunities and prospects, as this raw material is little studied. The effectiveness of the sorbents was assessed based on the results of the water specifications according to the following criteria: methods for determining the total hardness of water; methods for measuring the mass concentration of total iron in water; methods for the determination of chloride in water; methods for the determination of nitrogen-containing substances in water; methods for determining the dry residue content of water; methods for determining the sulphate content of water; on hygiene requirements and water quality control. Zeolite modifications were aimed at improving their adsorption properties, increasing the efficiency of pollutant removal and developing optimal methods of using zeolites in water filtration. Modified zeolite from the Chankanai and Daubabinsk deposits showed high efficiency as a filter. When it was used to treat natural water, which normally contains high hardness and alkalinity, the best results were achieved with zeolite from the Chankanai deposit. In terms of Fe+ and Cl content, the best results were achieved using zeolite from the Daubabinsk deposit.

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