Calculating Corrosion Parameters of Sheet and Wire (Helical) Samples when Classifying Atmospheric Corrosivity

The report deals with mathematical expressions derived for the purpose of calculating atmospheric corrosion rates, including those of changes in total weights and weights of corrosion products retained at the surface of flat sheets and wire helices used as samples in monitoring the corrosivity of the environment according to the International Standards ISO 9223 and ISO 9226.     

Determining the safe purge rate of flare tubes

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 5, pp. 5–7, May, 1993.     

Synthesis, characterization and catalytic application for wet oxidation of phenol of iron-containing clays

High-surface-area pillared clays (PILC) were prepared from naturally occurring montmorillonites by exchanging interlayer ions to polyoxocations containing (i) aluminum (Al₁₃-PILC), (ii) iron adsorpted onto Al₁₃-PILC, and (iii) iron and aluminum located within the same complex (Fe_0.8Al_12.2-PILC). The obtained Fe_0.8Al_12.2-PILCs were characterized by DR–UV–vis and IR spectroscopy, XRD, ESR, scanning electron microscopy and low temperature N₂ adsorption measurements. Important factors affecting catalyst activity and phenol removal efficiencies have been studied, i.e. the effect of pH, temperature, catalyst concentration and stability of the catalyst.     

Optical–microphysical properties of smoke haze from Siberian forest fires in summer 2012

A comprehensive experiment on the study of dynamics of optical and microphysical characteristics of submicron aerosols in the near-ground air layer was carried out in June–August of 2012 under conditions of extremely strong smoke haze originating from vast forest fires in Siberia. Variations of the spectral angular scattering coefficients and the degree of linear polarization in the visible wavelength range are studied, as well as the mass concentrations of dry fractions of aerosol and black carbon, relative content of black carbon (BC fraction), single scattering albedo, particle size distribution function, complex refractive index of the particulate matter, and parameter of condensation activity of aerosol. Peculiarities of differences between optical and microphysical characteristics of near-ground aerosol in smoke haze and under smokeless conditions are revealed. This study is important for validation of results of remote sensing of the composition of smoke haze and background atmosphere obtained from satellite data and sun photometric measurements at the Aerosol Robotic Network (AERONET).     

Properties of a relational framework synthesized over a set of semantically atomic predicates

Properties of a relational framework synthesized over a set of semantically atomic predicates are analyzed. A relational framework is shown to be stable with respect to a modification in the basic predicate set. The stability, uniqueness, and completeness allow one to consider a relational framework as a universal “carrier” for object domains with arbitrary semantics.     

Corrosion resistance of D16 alloy depending on the salinity and meteorological parameters of coastal atmosphere

Results of two-year-long atmospheric corrosion tests of D16 alloy in representative coastal regions under natural field conditions and during artificial sedimentation of sea sal that corresponded to a salinity range of 0?C300 mg Cl^?/(m² day) are discussed.     

Characteristics of radiation porosity and structural phase state of reactor austenitic 07C–16Cr–19Ni–2Mo–2Mn–Ti–Si–V–P–B Steel after neutron irradiation at a temperature of 440–600°C to damaging doses of 36–94 dpa

The phase composition and the characteristics of vacancy voids in cold-worked steel 07C–16Cr–19Ni–2Mo–2Mn–Ti–Si–V–P–B (CW EK164-ID) after neutron irradiation at damaging doses of 36–94 dpa and temperatures of 440–600°C are investigated. In the entire range of damaging doses and temperatures, voids with different sizes are observed in the material. The maximum void size increases with irradiation temperature up to ~550°C, whereas their concentration decreases. At higher irradiation temperatures, almost no coarse voids are observed. The concentration of fine voids (to 10 nm in size) sharply increases with temperature from 440 to 480°C. Further increases in the temperature do not result in the noticeable concentration growth. In the irradiation temperature range of 440–515°C, second phases precipitate (G phase, γ’ phase, and complex fcc carbides). At higher irradiation temperatures, there are Laves-phase particles, fine second carbides of the MC type, and needle shape precipitates identified as phosphides in the material.