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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 - 15 of 15
11.

Kinetics of Codeposition of Copper with N-Methylpyrrolidone in Sulfate Waterframe0Dimethylsulfoxide Electrolytes

 

V. V. Kuznetsova, L. M. Skibinaa, E. F. Kuznetsovaa, and I. N. Loskutnikovab

aRostov State University, ul. Zorge 7, Rostov-on-Don, 344090 Russia
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bDon State Technical University, Russia

Received October 20, 2005

 

Abstract — The electrolyte composition is found to affect the composition and density of the adsorption layer on the electrode. The lowest process rate is observed in the water structure stabilization range under conditions of the preferential adsorption of the additive and organic solvent molecules. The electroreduction of copper(II) ions involves the stage of their penetration through the adsorption film, while the dissociation of electroactive species, which precedes their discharge, has the “forced” nature. The increase in the adsorption activity of sulfate ions (which is due to the “salting-out” effect of the mixed solvent and the selective solvation) is accompanied by the acceleration of the process (the ' effect or the formation of surface associated products, in which anions play the role of bridge ligands).

 

PACS numbers: 81.15.Pq, 82.45.Qr

DOI: 10.1134/S0033173206060117
11/09/2008 | 1091 Hits | Print

12.

High-Temperature Chloride Corrosion of Industrial frame0frame1827 and frame2frame3-85 Nickel Alloys

I. V. Oryshich

 

Frantsevich Institute of Material Science Problems, National Academy of Sciences of Ukraine,
ul. Krzizhanovskogo 3, Kiev, 252680 Ukraine

Received March 10, 2006

 

Abstract — High-temperature chloride corrosion (ChC) of frame4frame5827 and frame6frame7-85 nickel alloys was investigated in a temperature range of 773 to 1173 K and exposure time of 1 to 50 h in the MgCl2–KCl–NaCl ternary eutectic and oxidation in air (at 873 to 1273 K for 500 h). The ChC is intergranular, intensely develops starting from a temperature of 973 K, and results in softening due to the strong extraction of chromium and aluminum from the base alloy. Other things being equal, the ChC rate exceeds the oxidation rate in air by two to three orders of magnitude.

 

PACS numbers: 81.65.Kn, 82.45.Bb

DOI: 10.1134/S0033173206060129
11/09/2008 | 1037 Hits | Print

13.

Corrosion of Carbon Steel in Soils of Varying Moisture Content

N. N. Glazov, S. M. Ukhlovtsev, I. I. Reformatskaya,
A. N. Podobaev, and I. I. Ashcheulova

 

Karpov Institute of Physical Chemistry, Vorontsovo Pole 10, Moscow, 105064 Russia

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Received March 18, 2005

 

Abstract — Electrochemical equipment, which enables one to study the processes of underground corrosion under conditions of differential aeration of soils, with no limitation of the experiment duration at a fixed position of the interface boundary and controlled moisture content, is developed. The character and rate of the corrosion process can be predicted by comparing the metal potentials with the polarization curves recorded in soil electrolytes at pH values typical of the near-electrode soil layer. The usage of solely gravimetric technique in studying the above corrosion processes may provide wrong results.

 

PACS numbers: 81.65.Kn, 82.45.Bb, 07.05.Fb

DOI: 10.1134/S0033173206060130
11/09/2008 | 1041 Hits | Print

14.

Stabilizing the Heat-Resistant Phases in Protective Coatings of the Blading of Turbines in Gas-Pumping Aggregates

N. M. Chigrinova

 

Institute of Powder Metallurgy, Byelorussian National Academy of Sciences, ul. Platonova 41, Minsk, 22005 Belarus

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Received November 3, 2003

 

Abstract — Applying functional high-temperature coatings to the working surface of the blading of gas turbines is discussed. Applying the coatings by microplasma-spark alloying, with the additional ultrasound modifying, as well as, using composite electrode materials based on intermetallic compounds is suggested for the stabilization of the heat-resistant phases.

 

PACS numbers: 46.50.+a, 81.15.Rs, 81.40.Np, 81.65.Kn

DOI: 10.1134/S0033173206060142
11/09/2008 | 1005 Hits | Print

15.

Functions of the Density Distribution, Describing the Character of Changes in the Stray Current Field Parameters

A. M. Kerimov, P. A. Spirin, and R. A. Kerimov

 

Azerbaidzhan Petroleum Academy, Azerbaidzhan

Received April 23, 2005

 

Abstract — As we showed earlier [4–6], corrosion studies involve numerous measurements and observations, the results of which require statistical processing. The procedure of the processing depends on the specific features inherent in the obtained data and characterizes their distributions. Generally, many problems can be best solved when the distribution function is at hand.

 

PACS numbers: 81.65.Kn

DOI: 10.1134/S0033173206060154
11/09/2008 | 990 Hits | Print

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