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(11/10) Ученые из ИФХЭ РАН и МГУ под руководством Ольги Виноградовой поняли, как «полосатая» гидрофобность..
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(11/10) Ученые обнаружили пути проникновения вирусов гриппа и ВИЧ в организм
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(17/04) Курс “Анализ геномных данных”, Москва, 2 – 11 июля 2012
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(12/03) Впервые получено изображение атомов, движущихся в молекуле
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Results 11 - 18 of 18
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. Ashcheulova
d, 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

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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 | 774 Hits | Print

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 | 704 Hits | Print

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 | 711 Hits | Print

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;
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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 | 748 Hits | Print

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 | 708 Hits | Print

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 Cuframe0Znframe1H2O and the manganese brass system H2O at 25frame2C 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 | 742 Hits | Print

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 | 718 Hits | Print

18.

Acidity of the Environment and Its Measuring

R. R. Salem

 

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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 | 737 Hits | Print

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