Lead (II) oxide dissolution rates in equimolar KCl–PbCl2 melt at Т = 773, 823 & 873 K have been determined by gravimetrical method. In temperature rising from 773 to 873 K, the initial dissolution rate is shown to increase from 23,9 to 45,6 mg/(cm2·min) at the conditional factor of roughness equal to 10. Then the rate values for all temperatures are lined up and after 25 min they are close to zero, thus meaning the diffusion mode of the process at the natural convection conditions. The activation energy of PbO interaction with KCl–PbCl2 melt is 37,370±0,118 kJ/mol. The PbO limiting concentration in equimolar KCl–PbCl2 melt at temperatures 773, 823 and 873 K is 9,1; 10,6; 13,5 wt.% respectively. 

The continuous weighing technique has been used for determination of cadmium evaporation degree (α) and rate (V) from binary alloys with nickel, copper and silver (2 wt.% each) at the temperature of 400–500 °C and the pressure of 13–2660 Pa with liquidus line transition from the liquid solution range to the impurity crystallization range under the isothermal conditions. The αand V change curves in time are characteristic for the impurity accumulation processes in the residue and the growing effect of the diffusion factor of more volatile component – cadmium supply to the evaporation surface. When the system passes the liquidus line, the V(τ) curves show a specific kink with V value decrease caused by the evaporation mechanism change. The cadmium evaporation rate in the two-phase field of coexistence cadmium intermetallic compound and liquid solutions on its basis is comparable to that from homogeneous alloy and it is admissible in the process technology.

Gallium sorption from alkaline solutions over various weak- and strong-basic anion-exchange resins under the dynamic conditions has been studied. The values of dynamic exchange capacity before breakthrough and full dynamic exchange capacity have been calculated. D-403 selective anion exchange resin has been selected. The gallate-ion sorption isotherm over D-403 weak-basic anion-exchange resin is described by Langmuir equation modified for ion-exchange equilibrium and the thermo-dynamic sorption parameters are determined. A method for determining gallium forms in alkaline solution is proposed. A series of anion sorption ability on the solid phase surface of D-403 anion exchange resin is presented. 

Calculations of nonequilibrium crystallization after Petrov-Sheil model in ternary alloys – solid solutions of the A–B–C model system and the real Cu–Ni–Mn system have been carried out. A discrepancy of the temperature, at which the medium-melting component distribution factor is equal to 1 and the temperature at which the component content in precipitated solid phase is maximum, is shown to be characteristic for intracrystalline segregation in both cases. The conditions under which the parameters of intracrystalline segregation should be compared with the indicators of dendritic segregation are formulated.

A comparative analysis of the effect of modification technique on the structure and phase composition of A34 solder ingots is presented. Modification has been performed by the melt overheating up to 1000 °C and introducing fine-crystalline remelt in quantity of 5 % of charge mixture. The research has been carried out with the differential thermal and metallographic analyses. Additionally we have studied the surface of A34 solder ingot by means of sc-AFM NTEGRA Therma nanolaboratory at higher temperatures (150 and 300 °C). Technological recommendations on optimization of casting and heat treatment of A34 solder ingots are given.

A method of producing melted composites by low-frequency treatment is presented. Some distinctive features of the process and the results of vibration treatment are unevident and require theoretical explanation. The factors, which hinder powder introduction into the melt, as well as the factors that influence the change in sizes of structural components in the process of low-frequency treatment have been examined. A new interpretation of the grinding and coagulation mechanism at low-frequency treatment followed by mathematical description and experimental verification is presented.

A mathematical model of warm rolling in RSP 14-40 and Trio-180 mills has been constructed using the finite element method with LS-DYNA software. The strain state analysis of rods in the course of rolling at temperatures of 450 °C, 350 °C and room one has been carried out. The evolution of initial coarse-crystalline microstructure in the course of rolling was investigated. The special features of initial microstructure transformation kinetics in rods into nanocrystalline structure and its relation with deformed state and temperature are established.

Isothermal bulk forming of AMg6 aluminum alloy blanks to produce irregular shape parts has been investigated with DEFORM-3D software. The following boundary conditions were used for the simulation: strain rate of 0,03 mm/s, strain resistance of 60 MPa, friction coefficient of 0,1. The computer model is shown to describe correctly real fabrication process of isothermal bulk forming, thus allowing us to recommend this program for designing the fabrication process to produce die forgings of irregular shape from aluminum alloys.

The effect of temperature on phase composition of cast aluminum alloy containing 0,55 % Zr, 0,23 % Fe and 0,06 % Si has been investigated with the use of Thermo-Calc program for the purpose of support of optimum annealing modes. The phase composition is determined and the equilibrium values of the composition of aluminum solid solution in alloy Al–0,55%Zr–0,23%Fe–0,06%Si are calculated at t = 200÷650 °C. In using multistage annealing, the maximal values of hardness and electric conductivity are shown to be reached at t = 400÷450 °C.

The research results of pure metal surface damaging have been obtained in the course of fatigue tests. Mathematical dependences of changing the fatigue resistance indicators on frequency of cyclic loading during bending deformation of rotating samples are deduced. Fatigue curve equations are given and changes in the microstructure at cyclic loading are shown.

The anodic behavior of Zn55Al alloy doped with scandium has been studied. The scandium content dependence of the Zn55Al alloy corrosion potential shows the extreme character. The increase in the chloride ion concentration in the electrolyte reduces the corrosion potential. When doping element content grows in the alloys, pitting and repassivation potentials are shifted to the positive area, and when chloride ion concentration grows, the potentials are shifted to the negative area over the entire range of environment pH. Zn55Al alloy corrosion rate decreases 2–3 times in doping 0,005–0,05 wt.% scandium. Thus the alloys of such composition can be recommended as anode coating for corrosion protection of steel structures, components, and constructions.