Abstract Based on the concept of collective vibrations of ions in the bulk of metal systems, the frequency of vibrations of an oxygen molecule on the aluminum–cerium alloy surface has been evaluated. Numerical estimation of the physical adsorption isobar has been carried out in accordance with the Henry law using these data and the heats of oxygen adsorption on the surface of this alloy in amorphous

Abstract Swelling of synthesized N-vinylpyrrolidone-based polymer sorbents in aqueous solutions with different pH has been studied. The initial rate and degree of swelling, their dependence on the ratio of functional monomer and cross-linking agents in the polymer samples synthesized in various solvents have been found. It has been shown that the sorption of nitrophenols depends on the swelling of

Abstract The regularities of the effect of the duration of coatings' galvanostatic formation in Zr(SO4)2 electrolyte on their composition, structure, surface contact angle with water, and the time of emergence of electrostimulated pitting when samples are in contact with an aqueous NaCl solution have been studied. It has been shown that coatings formed on titanium in the range of transition from the

Abstract— The processes of the pulsed magnetron sputtering (PMS) of multicomponent ceramic targets are studied upon deposition of functional coatings of various purposes. The regularities of changes in the structural characteristics, as well as mechanical and tribological properties, under increasing magnetron power frequency are studied. Summarizing the results obtained using the PMS technology upon

Abstract— The electrochemical properties of Ti–Al–Mo–Ni–N coatings with a molybdenum content of 20 and 25 at % fabricated by cathodic arc deposition (Arc-PVD) are studied. Series 2 coatings are characterized by the presence of Mo in both a chemically bound (Mo2N, as with series 1 coatings) and free states (i.e., metallic phase). Considering the multilayer architecture of coatings based on the mixed

Abstract This work is aimed at obtaining mixed cluster ions of amino acids with copper salts using soft ionization methods. We have shown that amino acid molecules are capable of forming aggregates stabilized by d-metals. In particular, such clusters can form in the presence of silver salts. In the present work, it is revealed that the largest cluster ions can be obtained using the electrospray ionization

Abstract The structural organization of the surface (active) layer and the state of water in composite ultrafiltration membranes have been investigated by means of the methods of vibrational IR spectroscopy and differential scanning calorimetry (DSC). Analysis of the shape of the absorption band of stretching vibrations of hydroxyl groups at ν = 3366.2 cm–1 with an asymmetry coefficient of ~1 and the

Abstract A method for constructing the spectral dependence of near-field maximum efficiency \(Q_{{nf}}^{{{\text{max}}}}\) on the surface of a spherical nanoparticle has been suggested. It has been shown that, for preset wavelength λ and a selected refractive index of the environment n, the dependences of near-field efficiency Qnf on particle radius a had the form of smooth curves with a maximum. Therefore

Abstract Silver nanoparticles (Ag NPs) have been synthesized in various media using chemical reduction of silver ions with tannin and absorption spectra have been recorded during synthesis of organosol, organohydrosol, and hydrosol. Analysis of the spectra has provided the concentration of Ne conduction electrons, volume fraction of particles NV, and damping coefficient of plasma oscillations γ, which

Abstract The properties of a cobalt-modified nanoporous alumina formed by two-stage oxidation were investigated by electrochemical impedance spectroscopy. States corresponding to the different distribution of cobalt in the pores are considered. Equivalent circuits were selected that adequately correspond to the obtained impedance spectra, allowing the results of surface modification and its change

Abstract— The adsorption of nitrogen, argon, and methane onto MN-270 polymer adsorbent was studied within a pressure range of 0.1–40 MPa at temperatures of 303, 323, 343, and 363 K. The excess adsorption isotherms were measured for these adsorption systems, the adsorption volumes were determined, the total content adsorption isotherms, characteristic energies of adsorption, and differential, integral

Abstract The sorption activity of ethylcellulose–bentonite composites toward methylene blue has been studied. It has been determined that the degree of recovery of the dye with the composites increases by a factor of 2.5 as compared to unmodified polymer along with a significant decrease in the equilibrium time. Quantitative characteristics of sorption, such as modulus, filler content in composite

Abstract— Nanodispersed molybdenum sulfide decorated with platinum nanoparticles is proposed as a new catalytic nanosystem for a Li–O2 battery. Using platinum as a catalytically active material reduces the overvoltage during charging. Due to the chemical stability of molybdenum sulfide as a support material, the current and power parameters of the system increase to 1000 mA/g, while the number of cycles

Abstract Composite Nb–Y–N films with different yttrium content (Y/(Nb + Y), at %) were prepared by reactive magnetron sputtering and the microstructure, oxidation resistance and mechanical properties were investigated. A combination of X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) analyses showed that the face-centered cubic (fcc) Nb–Y–N and hexagonal close-packed

Abstract Essential oil of a medicinal plant (Salvia officinalis), used as an eco-friendly inhibitor for the corrosion of carbon steel in 1 M HCl, is presented. The corrosion inhibition properties of Salvia officinalis essential oil were evaluated by gravimetric and electrochemical methods. The results showed that the inhibition efficiency increases with the increase in inhibitor content to reach 82

Abstract The present study is focused on evaluating the corrosion resistance of 1018 carbon steel and the influence of using a corrosion inhibitor in its corrosion behavior. In particular, the corrosion inhibitor prepared in the present study consists in an organic compound of hydroxyethyl-imidazoline derivate based on avocado oil. A mixture of brine-diesel saturated with CO2 was used as a corrosive

Abstract Stellite 6 alloy hardfacing has been popularly applied on the seat face of control valves where both wear and corrosion in various corrosive media are involved. In this research, Stellite 6 alloy hardfacing is prepared via laser cladding and the wear performance and corrosion behavior in morpholine, 3.5 wt % NaCl, and Green Death solution, of this hardfacing are investigated using a pin-on-disc

Abstract The goal of the present investigation is to evaluate the influences of plating parameters such as TiO2 nanoparticles concentration in the plating bath and applied current density on the microstructure-related and mechanical properties as well as corrosion behavior of Ni–Co coatings. The coatings were fabricated by different current densities and TiO2 nanoparticles concentration over the range

Abstract The effect of annealing temperature on the properties of silver thin films has been investigated. Ag thin films have been deposited on glass substrates by electron beam coating, afterward subjected to annealing in a mixed ambient of air and oxygen at 100, 200, 300, 400 and 500°C for 3 h and then cooled slowly. The crystallographic structures of the Ag thin films were studied as a function

Abstract Pure lead powder can be electrodeposited by reduction of lead ions (Pb2+) in aqueous electrolyte. In this investigation, ultra-fine lead powders with a minimum median diameter of 4.5 μm were electrodeposited in acetate solution. The formation mechanism of lead oxide (PbO) during electrodeposition was proposed. Operation parameters such as pH value, current density, and gelatin had remarkable

Abstract In this study, titanium dioxide nanotubes (TiO2–NTs) are prepared by using anodization method on commercial pure titanium (Ti) by applying constant voltage of 60 V to the electrolysis system for 15 min, one and two hours. Highly ordered and quality TiO2–NTs layers are formed on Ti electrode. To investigate the corrosion behavior of TiO2–NTs in 1 M KOH solution, electrochemical and surface

Abstract In this study, two different hybrid sols as tetraethyl orthosilicate/(3-Glycidyloxypropyl) trimethoxysilane (TEOS/GPTMS) and tetrapropyl orthotitanate/(3-Glycidyloxypropyl) trimethoxysilane (TPOT/GPTMS) were prepared and Aluminum AA7020 alloy was coated with these sols by the dip-coating method. Corrosion behavior of coated samples in 3.5% NaCl solution was investigated using potentiodynamic

Abstract Salix leaves water extract was studied for the corrosion inhibition of mild steel in H2SO4 at different temperatures. Energy dispersive spectroscopy (EDX), Gas Chromatography Mass spectrometry (GC–MS), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used in our investigation. By applying different techniques as potentiodynamic polarization and electrochemical

Abstract It has recently been synthesized a Schiff base (E)-2-hydroxy-5-(2-benzylidene) aminobenzoic acid and characterized by FTIR, UV–vis and 1H NMR analysis. The electrochemical behaviour of mild steel in 1.0 M HCl solutions in the absence and presence of Hha has been investigated by electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy. The inhibition

Abstract Titanium and titanium alloys are intriguing materials having widespread industrial and medical applications due to their excellent corrosion resistance and biocompatibility. These entice our interest to scrutinize the electrochemical and semiconducting properties of the naturally grown surficial oxide films on Ti metal and its Ti–6Al–4V alloy in borate buffer solutions of pH 6, 7 and 8 at

Abstract In this study, AISI 303 steels are boronized by pack boring method at 1123, 1173 and 1223 K for 2, 4 and 6 h. The morphology of the boride layers formed on the steel surfaces was examined by optical microscope. The hardness values were measured by the micro-hardness tester and the phases formed on the layer were determined by XRD method. In the XRD analysis, FeB, Fe2B, CrB and MnB phases were

Abstract Shot peening is a treatment used to increase surface hardness and wear resistance. In this study, the effect of shot peening on the microstructure, hardness and wear resistance of AZ31 magnesium alloy was investigated. For this purpose, specimens were exposed to shot peening operation using steel pellets for periods of 20, 40, 60, and 80 min. Microstructures were investigated using a scanning

Abstract It has been demonstrated that adsorption isotherms on microporous activated carbons calculated by the method of molecular dynamics at temperatures higher than critical for adsorbents quantitatively coincide with experimental isotherms at calculations in micropores of finite sizes, with the micropore width being chosen in accordance with the theory of micropore volume filling and properly selected

Abstract The occurrence of side chemical reactions during regeneration of the highly basic anion exchanger AB-17-2P with adsorbed vanillin with an alkali solution in the presence of atmospheric oxygen was confirmed by the method of gas chromatography/mass spectrometry. A number of the vanillin transformation products were identified. The method of mass spectrometry with matrix-activated laser desorption/ionization

Abstract A multilayer material has been obtained on the basis of a prepreg modified by an aluminum layer, which is a precursor for fiberglass composite formation. An aluminum layer was preliminarily deposited on the prepreg by plasma spraying. Thereafter, a fiberglass composite with aluminum layers on the outer sides was formed using a modified prepreg and an oxide coating was fabricated on the aluminum

Abstract— Rare earth cerium oxide synthesized from cerium (III) chloride and cerium (III) nitrate salts in electrolytes were used to develop nanostructured composite coatings by plasma electrolytic oxidation (PEO) technique on Ti6Al4V. The micro-hardness (542 HV) and corrosion resistance of fabricated coat in the electrolyte containing cerium (III) nitrate was notable. Formation of the ceria/titania

Abstract Mesoporous titanosilicate structures synthesized by the sol–gel method using the cetylpyridinium template at different Ti/Si ratios are characterized by high specific surface areas ABET ≈ 800 m2/g and Aext ≈ 900–1000 m2/g, as well as the shape of the isotherms of physical nitrogen adsorption characteristic of the mesoporous molecular sieve MCM-41 with an adsorption branch rising and a section

Abstract— Novel anionic 4-tert-Octylphenol Ethoxylated Phosphate Dipotassium salt (ethoxylated with 5 moles of ethylene oxide) surfactant was prepared and designated as OP-5-EO-K2PO, was characterized for its structure using spectroscopic measurements, in addition, its surface properties were investigated. The results indicated that OP-5-EO-K2PO exhibits excellent surface activity. Evaluation of the