Plasma electrolytic oxidation method (PEO) is used to create high hardness coating with the abrasion resistance and corrosion resistance on alloys of aluminum, magnesium, copper, titanium, etc. Creat a coating on the D16 alloy surface by the PEO method in the electrolytic solution of silicate- alkaline Na2O.(SiO2)n modul: 2,85 (12 g/L) and NaOH (2 g/L); add Co(OH)2 and V2O5 to silicate - alkaline solution with a ratio of 2 g/l, we obtain a coating with a hardness increased from 7.3 to 7.9 times, protection efficiency against corrosion in 5 % NaCl solution, it reaches 89.64 to 94.03 %. Through analysis of coating by SEM, EDS and X-Rays methods, it was found that in the coating composition are present of metal oxides, which come from D16 alloy and substances in the electrolyte solutions. The coating has a high hardness due to the formation of aluminum oxide in the form of α-Al2O3.

Adhesives based on nitrile rubber are widely used in many different fields. In this article, the authors have proposed an application and process for making colloidal solutions based on a mixture of nitrile rubber and natural rubber. Research has been conducted to investigate the influence of the ratio of rubber components, the proportion of ingredients of fillers, the ratio of phenolformaldehyde resin to the calculation of technical requirements and the bond strength of the adhesive. Test results determine the bond strength is equivalent to BK-3 adhesive (in imported from Russia, OCT 1 190281-86).

This paper presents the influence of oxidizer/fuel ratios on several energetic characteristics (combustion heat, gaseous volume, burning rate) of the red flame pyrotechnic containing potassium perchlorate, magnesium, strontium carbonate, polyvinyl chloride, and novolac resin. Based on the received experimental data and theoretical results, the reasonable potassium perchlorate/magnesium ratio of 25/22 is determined. The pyrotechnic mixture has the combustion heat of 841 cal/g, the gaseous volume of 250 ml/g, the burning rate of 8,1 mm/s at a pressed density of 1.56 g/cm3, the color purity of 91%, the decomposition temperature of 525oC, and small friction sensitivity. The pyrotechnic mixture can be used for red stars in signal mines.

The synthesis of Al 2 TiO 5 /SBA-15 (ATO/SBA) catalysts was investigated by the sol-gel method using precursors including aluminum nitrate, titanium isopropoxide, SBA-15, and citric acid. The formation of ATO/SBA phases was analyzed by X-ray diffraction (XRD). The content of ATO in ATO/SBA catalysts strongly affected the photocatalytic degradation of cinnamic acid (CA). The obtained results showed that 75% ATO in ATO/SBA (75ATO/SBA ) phases led to the highest efficiency of CA photodegradation. The characteristics of 75ATO/SBA sample were determined by Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller adsorption, UV-Vis diffuse reflectance spectroscopy, and transmission electron microscopy. Moreover, the activity of 75ATO/SBA on photocatalytic degradation of CA was also investigated by catalyst dosage, initial pH of CA solution, and airflow rate. The optimum condition for photodegradation efficiency of CA was found to be at C cat = 0.75 g/L, pH = 3.8, Q air = 0.3 L/min and t react = 6 hrs.