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11.
Corrosion Pyrophoric Deposits as Promoters of Self-Ignition of Storage Tanks with Sour Crude Oil Yu. A. Beilina, L. A. Nisel’sonb, I. R. Begishevc, L. I. Filimonova, B. A. Shishkanova,
I. I. Ashcheulovad, A. N. Podobaevd, and I. I. Reformatskayad a ZAO YuKOS EP, Russia b OOO LANKhIT, Russia c Academy of State Fire Service, Emergency Ministry of the Russian Federation,
ul. Borisa Galushkina 4, Moscow, 129366 Russia d Federal State Unitary Enterprise State Scientific Center of the Russian Federation
“Karpov Research Institute of Physical Chemistry,” ul. Vorontsovo pole 10, Moscow, 103064 Russia E-mail:
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Received August 4, 2006 Abstract — The causes of the formation and the conditions for self-ignition of pyrophoric deposits in the vapor zone of tanks during the storage of sour crude oil were considered. It was demonstrated that creation of an oxygen-free atmosphere inside oil storage tanks seems to be the most promising approach to prevention of selfignition and corrosion. This approach was effected in practice by supplying oil tanks with nitrogen from a membrane gas separator. PACS numbers: 81.65.Kn DOI: 10.1134/S0033173207030113
09/09/2008 | 937 Посещения | Печать
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12.
Growth of Anodic Oxide Layers under Electric Discharge Conditions V. S. Rudnev Institute of Chemistry, Far East Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159,
Vladivostok, 690022 Russia Received March 28, 2006 Abstract — Experimentally observed mechanisms of the formation of oxide structures on metals in electrolytes under electric discharge conditions are described. Processes of the formation of oxide layers generated by an ensemble of independent spark and arc discharges, the formation of films due to nucleation and radial growth of bulk nuclei of the new phase, and the formation of surface structures by propagating discharges are discussed. PACS numbers: 77.22.Gp, 81.15.-z, 81.65.Rv, 82.45.Bb DOI: 10.1134/S0033173207030125
09/09/2008 | 855 Посещения | Печать
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13.
Peculiarities of Electroplating Tantalum Coatings from Fluoride Melts V. A. Pavlovskii Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Moscow, Russia Received April 13, 2006 Abstract — Electroplating tantalum coatings on molybdenum, copper, and steel is studied. The effects of various factors (the composition of a fluoride bath, its temperature, current density, and the electric charge spent) on the electrocrystallization of the deposit, its roughness, the degree of dendrite formation, current efficiency, and a possibility to plate multilayer coatings and produce tantalum wares by electrotyping are investigated. To compare the characteristics of the coatings, the studies in a standard chloride–fluoride salt system containing potassium fluorotantalate (K2TaF7) were also carried out under similar conditions. PACS numbers: 81.15.-z; 81.15.Pq DOI: 10.1134/S0033173207030137
09/09/2008 | 891 Посещения | Печать
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14.
Modification of Titanium Surface during Its Chemical Etching in Fluoride-containing Media M. G. Dontsov, A. V. Balmasov, A. A. Balukova, and O. I. Nevskii Ivanovo State University of Chemical Technology, pr. F. Engel’sa 7, Ivanovo, 153000 Russia;
E-mail:
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Received May 14, 2006 Abstract — The effects of solution composition on the electrical and other physical properties of surface films formed during the titanium chemical etching in fluoride-containing media are studied. It is shown that the for-mation of resistive oxide films results in the surface leveling and an increase in its reflectivity. PACS numbers: 81.40.–z DOI: 10.1134/S0033173207030149
09/09/2008 | 906 Посещения | Печать
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15.
Chromateless Treatment of Zinc-Plated Rolled Metal V. A. Paramonov, A. T. Moroz, N. G. Filatova, and O. A. Kazandzhiyan Bardin Central Research Institute for the Iron and Steel Industry, Vtoraya Baumanskaya ul. 9/23, Moscow, 105005 Russia Received November 14, 2005 Abstract — In the last decade, the production of galvanized rolled metal has been considerably developed. Consumers of such a material are civil engineering, car manufacturing, and other industry branches. This work considers a possibility of replacing the chromating of the zinc-plated rolled metal by the environmentally safe siliconizing (silicification). PACS numbers: 81.65.Rv; 82.45.Bb DOI: 10.1134/S0033173207030150
09/09/2008 | 838 Посещения | Печать
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16.
Thermodynamics of Chemical and Electrochemical Stability of Brasse A. G. Tyurin and A. A. Shrainer Chelyabinsk State University, ul. Br. Kashirinykh 129, Chelyabinsk, 454021 Russia Received April 19, 2006 Abstract — Based on the theory of “regular” solutions, the thermodynamic properties of  -,  -,  -,  -, and  -phases of the Cu–Zn system are described. The surface activity of the elements in the phases is assessed. Potential–pH diagrams for the general system Cu Zn H2O and the manganese brass system H2O at 25 C are plotted. The nature of passivating films on conventional and special brasses and their composition are elucidated in different pH and potential ranges. PACS numbers: 82.60.-s, 82.60.Hc DOI: 10.1134/S0033173207030162
09/09/2008 | 876 Посещения | Печать
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17.
Accumulating Ability of Biofouling Microbiocenose with Respect to Certain Heavy Metals in Harbor and Control Water of Marine Corrosion Stations A. P. Suponina, M. D. Koryakova, and V. G. Kuryavyi Institute of Chemistry, Far East Division, Russian Academy of Sciences,
pr. Stoletiya Vladivostoka 159, Vladivostok, 690022 Russia Received February 16, 2006 Abstract — The ability of microbe colonies on focusing screen to accumulate certain heavy metals and aluminum and the effect of impact seawater on the corrosion resistance of high-alloy steel are studied. PACS numbers: 90.20.-h; 92.20.Ny DOI: 10.1134/S0033173207030174
09/09/2008 | 854 Посещения | Печать
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18.
Acidity of the Environment and Its Measuring R. R. Salem E-mail:
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Received June 15, 2006 Abstract — The acidity of aqueous solutions is treated as the manifestation of the donor-acceptor properties of water molecules. Membrane and liquid-phase potential jumps are calculated. PACS numbers: 34.70.+e; 73.40.-c; 82.30.Fi; 82.45.Gj DOI: 10.1134/S0033173207030186
09/09/2008 | 867 Посещения | Печать
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