Results 251 to 260 of about 46,800 (289)
Some of the next articles are maybe not open access.
Electrochimica Acta, 1997
In addition to single nickel crystals also nickel samples produced by dc and pr (pulse-reversal) plating were examined. As previously reported the true rate of dissolution of nickel in solutions containing oxygen was found to be as much as three times the electrochemical rate at the corrosion potential. When passivation was approached (spontaneously or
G. Bech-Nielsen +2 more
openaire +1 more source
In addition to single nickel crystals also nickel samples produced by dc and pr (pulse-reversal) plating were examined. As previously reported the true rate of dissolution of nickel in solutions containing oxygen was found to be as much as three times the electrochemical rate at the corrosion potential. When passivation was approached (spontaneously or
G. Bech-Nielsen +2 more
openaire +1 more source
Chemical Geology, 1990
Abstract A new selective chemical dissolution procedure for geological samples has been developed: six components were separated, i.e. carbonate, metal, sulfide, oxide, silicate and HF-insoluble residue. A series of experimental parameters, e.g. reagent types, temperature, time and pH-value, in dissolving the various phases has been investigated. The
Kong Ping, Chai Chifang
openaire +1 more source
Abstract A new selective chemical dissolution procedure for geological samples has been developed: six components were separated, i.e. carbonate, metal, sulfide, oxide, silicate and HF-insoluble residue. A series of experimental parameters, e.g. reagent types, temperature, time and pH-value, in dissolving the various phases has been investigated. The
Kong Ping, Chai Chifang
openaire +1 more source
Chinese Physics B, 2017
Two kinds of InAs/GaAs quantum dot (QD) structures are grown by molecular beam epitaxy in formation–dissolution–regrowth method with different in-situ annealing and regrowth processes. The densities and sizes of quantum dots are different for the two samples.
Guan-Qing Yang +4 more
openaire +1 more source
Two kinds of InAs/GaAs quantum dot (QD) structures are grown by molecular beam epitaxy in formation–dissolution–regrowth method with different in-situ annealing and regrowth processes. The densities and sizes of quantum dots are different for the two samples.
Guan-Qing Yang +4 more
openaire +1 more source
Low Temperature Physics, 1998
The kinetics of growth and dissolution of a new phase during phase separation and homogenization of solid He3–4He mixtures is studied experimentally. It is found that both these processes have different kinetics, while homogenization is ensured by an anomalously rapid transport of matter in the crystal.
A. N. Gan’shin +5 more
openaire +1 more source
The kinetics of growth and dissolution of a new phase during phase separation and homogenization of solid He3–4He mixtures is studied experimentally. It is found that both these processes have different kinetics, while homogenization is ensured by an anomalously rapid transport of matter in the crystal.
A. N. Gan’shin +5 more
openaire +1 more source
Corrosion, 2004
Chromium corroding in deaerated aqueous solution of sulfuric acid (H2SO4; pH 1 to 3) produces Cr(II) and Cr(III) ions simultaneously in the ratio 7:1, as well as H2. The corrosion potentials of electrochemically activated chromium are determined by the electrochemical processes as expected according to the Wagner-Traud model. However, the real rates of
D.M. Dražić, J.P. Popić
openaire +1 more source
Chromium corroding in deaerated aqueous solution of sulfuric acid (H2SO4; pH 1 to 3) produces Cr(II) and Cr(III) ions simultaneously in the ratio 7:1, as well as H2. The corrosion potentials of electrochemically activated chromium are determined by the electrochemical processes as expected according to the Wagner-Traud model. However, the real rates of
D.M. Dražić, J.P. Popić
openaire +1 more source
Anodic Dissolution of Metals—Anomalous Valence
1974When metals are dissolved anodically in aqueous and nonaqueous media, the weight of metal dissolved is sometimes greater than that calculated from Faraday’s law assuming normal oxidation states. Among several metals of industrial importance, Al, Be, Cd, Fe, Pb, Mg, Ti, and Zn exhibit this phenomenon.
openaire +1 more source
Protection of Metals, 2001
Based on an idea about common intermediate particles, a physicochemical model of iron dissolution and hydrogen evolution is proposed. According to the model, the independence of the dissolution rate of a cathodically polarized metal of the potential is a particular case of chemically conjugate anodic–cathodic reactions.
I. D. Zartsyn +2 more
openaire +1 more source
Based on an idea about common intermediate particles, a physicochemical model of iron dissolution and hydrogen evolution is proposed. According to the model, the independence of the dissolution rate of a cathodically polarized metal of the potential is a particular case of chemically conjugate anodic–cathodic reactions.
I. D. Zartsyn +2 more
openaire +1 more source
Mendeleev Communications, 1995
An anomalous chemical mechanism of aluminium dissolution has been experimentally determined in electrolytes containing HCI based on proton-donor solvents (methanol, ethanol, propanol, water), and this mechanism has been explained by a new theoretical approach based on the comparison of the work function of aluminium with the electron affinity of ...
Naum M. Gontmakher +3 more
openaire +1 more source
An anomalous chemical mechanism of aluminium dissolution has been experimentally determined in electrolytes containing HCI based on proton-donor solvents (methanol, ethanol, propanol, water), and this mechanism has been explained by a new theoretical approach based on the comparison of the work function of aluminium with the electron affinity of ...
Naum M. Gontmakher +3 more
openaire +1 more source
Journal of Non-Newtonian Fluid Mechanics, 1981
Abstract It has been shown that the dissolution rate of gypsum in films of dilute sodium carboxymethylcellulose (SCMC) solutions is anomalously high compared with theoretical predictions. Two possible explanations of this phenomenon are discussed: either the coefficient of diffusivity in these solutions is much greater than it is in water, or the ...
G. Peev, A. Nikolova
openaire +1 more source
Abstract It has been shown that the dissolution rate of gypsum in films of dilute sodium carboxymethylcellulose (SCMC) solutions is anomalously high compared with theoretical predictions. Two possible explanations of this phenomenon are discussed: either the coefficient of diffusivity in these solutions is much greater than it is in water, or the ...
G. Peev, A. Nikolova
openaire +1 more source
Materials Letters, 2016
Abstract An anomalous deformation-induced dissolution of the intermetallics Ni 3 Al in the matrix of austenitic Fe–Ni–Al alloy has been revealed in experiment at cryogenic temperatures (down to 77 K) under high pressure torsion. The observed phenomenon is explained as the result of deformation-stipulated migration of interstitial atoms from a ...
V.V. Sagaradze +5 more
openaire +1 more source
Abstract An anomalous deformation-induced dissolution of the intermetallics Ni 3 Al in the matrix of austenitic Fe–Ni–Al alloy has been revealed in experiment at cryogenic temperatures (down to 77 K) under high pressure torsion. The observed phenomenon is explained as the result of deformation-stipulated migration of interstitial atoms from a ...
V.V. Sagaradze +5 more
openaire +1 more source