Влияние добавок таллия на кинетику окисления сплава Zn22Al

The article presents the results of a thermogravimetrical study of the effect of thallium alloying additives on the oxidation kinetics of the Zn22Al alloy. Established in the temperature range of 473–623 K the kinetic and energy parameters of the oxidation of alloys. The oxidation of alloys proceeds according to the hyperbolic mechanism and has the order of 10–4 kg∙m‑2∙sec‑1. Higher activation energies indicate that the oxidation of these alloy samples results in the formation of oxide films with good protective properties. Additives of thallium in amounts of 0.01–1.0 wt.% contribute to a decrease in the oxidizability of the Zn22Al alloy. The resulting products during the oxidation of the studied alloys consist of a mixture of oxides ZnO, ZnAl2O4, Al2O3, Tl2O3В статье приведены результаты термогравиметрического исследования влияния легирующих добавок таллия на кинетику окисления сплава Zn22Al. В интервале температур 473–623 K установлены кинетические и энергетические параметры процесса окисления сплавов. Окисление сплавов протекает по гиперболическому механизму и имеет порядок 10–4 кг∙м‑2∙сек‑1. Более высокие значения энергий активации свидетельствуют о том, что при окислении данных образцов сплавов образуются оксидные пленки с хорошими защитными свойствами. Добавки таллия в количествах 0.01–1.0 мас.% способствуют уменьшению окисляемости сплава Zn22Al. Образующиеся продукты при окислении изученных сплавов состоят из смеси оксидов ZnO, ZnAl2O4, Al2O3, Tl2O

ELABORATION OF THE BALANCE SHEET LIQUIDITY ANALYSIS - REQUIREMENTS OF THE PERIOD

Practical solutions of analysis of accounting balance sheet liquidity were investigated in this article. Techniques and information sources of economic analysis in the subject matter were developed

PROBLEM POLLUTION OF THE ENVIRONMENT

The article considers the problem of environmental pollution, which is relevant to date. Plants, exhaust gases, garbage - all this is harmful to the life of the planet. That's why, in the opinion of the authors, a person must fight for the purity of nature.The assessment of the level of atmospheric air pollution in cities, taking into account the exposure of vehicles is an extremely relevant issue, as a person calls high quality atmospheric secondary

THE ISSUES OF ACCOUNTING DEBITOR LOANS IN THE BALANCE SHEET

About titles and presentation of debtors (receivables) in balance sheet have been discussed in this article and shown mistakes in the matter. Considerable suggestions regarding to presentation of debtors (receivables) in the financial statement form have been expounded

Effects of geometric optics in conformal Weyl gravity

We have investigated effect of geometric optics as the rotation of polarization vector of light in spacetime of gravitational compact object in the fourth-order theory of conformal Weyl gravity. The Pineault-Roeder method is applied to the rotating Weyl metric, and analytical results are obtained in the limit of weak field and or slow rotation. For the photon traveling parallel to the symmetry axes from the equatorial plane to infinity, the rotation of the polarization plane depends on the Weyl parameter on the contrary to the Kerr spacetime where there is no rotation of polarization plane for this case

Building monitoring in Bishkek and Dushanbe by the use of ambient vibration analysis

Within the framework of the EMCA - Earthquake Model Central Asia project, the cities of Bishkek (Kyrgyzstan) and Dushanbe (Tajikistan) were selected for building monitoring using measurements of seismic noise to obtain the dynamical properties of the buildings. Eight buildings of different construction types, date of construction and building height, both, Soviet-era and recently constructed buildings, were instrumented for a period of a few hours. In this study, an overview of the experiment is given, including a short description of each monitored building's structure and the performed installation. Preliminary results for a representative Soviet-era residential building in Dushanbe are presented. Modal analysis is performed using the Frequency Domain Decomposition (FDD) method to estimate the natural frequencies and the mode shapes. The wave propagation velocities in the two directions along the building axes are determined by an interferometric approach. Although the experimental set-up was not the optimal, valuable information about the dynamical characteristics of the buildings were still obtained