TY  - JOUR
AU  - Vorkapić, L. Ž.
AU  - Dražić, Dragutin M.
PY  - 1979
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2753
AB  - It has been shown that the dissolution rate for iron at cathodic potential is higher than expected on the grounds of the Wagner-Traud mixed potential theory. This observation cannot be explained by a parallel chemical process as suggested by Kolotyrkin et al. The dissolution appeared to be unaffected by potential, pH, cations (Li+, Na+, K+), anions (SO2-4, Cl-, ClO-4) and solvent (water-dioxan mixtures). However, the dissolution rate was decreased by an order of magnitude when the electrode was connected to a strong magnet, suggesting that the mechanical degradation of the surface under the influence of the cathodically evolved hydrogen is the main cause of the measured effects. © 1979 Pergamon Press Ltd.
PB  - Pergamon Press
T2  - Corrosion Science
T1  - The dissolution of iron under cathodic polarization
VL  - 19
IS  - 7
SP  - 643
EP  - 651
DO  - 10.1016/S0010-938X(79)80065-7
ER  - 

@article{
author = "Vorkapić, L. Ž. and Dražić, Dragutin M.",
year = "1979",
abstract = "It has been shown that the dissolution rate for iron at cathodic potential is higher than expected on the grounds of the Wagner-Traud mixed potential theory. This observation cannot be explained by a parallel chemical process as suggested by Kolotyrkin et al. The dissolution appeared to be unaffected by potential, pH, cations (Li+, Na+, K+), anions (SO2-4, Cl-, ClO-4) and solvent (water-dioxan mixtures). However, the dissolution rate was decreased by an order of magnitude when the electrode was connected to a strong magnet, suggesting that the mechanical degradation of the surface under the influence of the cathodically evolved hydrogen is the main cause of the measured effects. © 1979 Pergamon Press Ltd.",
publisher = "Pergamon Press",
journal = "Corrosion Science",
title = "The dissolution of iron under cathodic polarization",
volume = "19",
number = "7",
pages = "643-651",
doi = "10.1016/S0010-938X(79)80065-7"
}

Vorkapić, L. Ž.,& Dražić, D. M.. (1979). The dissolution of iron under cathodic polarization. in Corrosion Science
Pergamon Press., 19(7), 643-651.
https://doi.org/10.1016/S0010-938X(79)80065-7

Vorkapić LŽ, Dražić DM. The dissolution of iron under cathodic polarization. in Corrosion Science. 1979;19(7):643-651.
doi:10.1016/S0010-938X(79)80065-7 .

Vorkapić, L. Ž., Dražić, Dragutin M., "The dissolution of iron under cathodic polarization" in Corrosion Science, 19, no. 7 (1979):643-651,
https://doi.org/10.1016/S0010-938X(79)80065-7 . .

TY  - JOUR
AU  - Dražić, Dragutin M.
AU  - Vorkapić, L. Ž.
PY  - 1978
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2758
AB  - The presence of metal ions (Cd2+, Mn2+, Zn2+), more electronegative than the cathodic potential for the hydrogen evolution reaction on iron in a 0.25M H2SO4 solution, inhibits the hydrogen evolution reaction and corrosion of iron. This effect has been explained as the under-potential deposition of the adatoms of these metals on iron. © 1978.
PB  - Pergamon Press
T2  - Corrosion Science
T1  - Inhibitory effects of manganeous, cadmium and zinc ions on hydrogen evolution reaction and corrosion of iron in sulphuric acid solutions
VL  - 18
IS  - 10
SP  - 907
EP  - 910
DO  - 10.1016/0010-938X(78)90011-2
ER  - 

@article{
author = "Dražić, Dragutin M. and Vorkapić, L. Ž.",
year = "1978",
abstract = "The presence of metal ions (Cd2+, Mn2+, Zn2+), more electronegative than the cathodic potential for the hydrogen evolution reaction on iron in a 0.25M H2SO4 solution, inhibits the hydrogen evolution reaction and corrosion of iron. This effect has been explained as the under-potential deposition of the adatoms of these metals on iron. © 1978.",
publisher = "Pergamon Press",
journal = "Corrosion Science",
title = "Inhibitory effects of manganeous, cadmium and zinc ions on hydrogen evolution reaction and corrosion of iron in sulphuric acid solutions",
volume = "18",
number = "10",
pages = "907-910",
doi = "10.1016/0010-938X(78)90011-2"
}

Dražić, D. M.,& Vorkapić, L. Ž.. (1978). Inhibitory effects of manganeous, cadmium and zinc ions on hydrogen evolution reaction and corrosion of iron in sulphuric acid solutions. in Corrosion Science
Pergamon Press., 18(10), 907-910.
https://doi.org/10.1016/0010-938X(78)90011-2

Dražić DM, Vorkapić LŽ. Inhibitory effects of manganeous, cadmium and zinc ions on hydrogen evolution reaction and corrosion of iron in sulphuric acid solutions. in Corrosion Science. 1978;18(10):907-910.
doi:10.1016/0010-938X(78)90011-2 .

Dražić, Dragutin M., Vorkapić, L. Ž., "Inhibitory effects of manganeous, cadmium and zinc ions on hydrogen evolution reaction and corrosion of iron in sulphuric acid solutions" in Corrosion Science, 18, no. 10 (1978):907-910,
https://doi.org/10.1016/0010-938X(78)90011-2 . .

TY  - JOUR
AU  - Żółtowski, Piotr
AU  - Dražić, Dragutin M.
AU  - Vorkapić, L. Ž.
PY  - 1975
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4599
AB  - The short time overload capacity of the carbon-air electrode in a strongly alkaline electrolyte can be increased by addition of organic redox substances such as duroquinone (DQ) or 2-amino-1.4-naphthoquinone (ANQ). DQ, however, slowly decomposes in alkalies, while ANQ is quite stable even in 9M KOH. Small amounts of both quinones have a catalytic effect on the oxygen reduction at the carbon-air electrode.
PB  - Switzerland : Springer Nature
T2  - Journal of Applied Electrochemistry
T1  - Carbon air electrode with regenerative short time overload capacity. II. Effects of duroquinone and 2-amino-1.4 naphthoquinone
VL  - 5
IS  - 1
SP  - 79
EP  - 87
DO  - 10.1007/BF00625962
ER  - 

@article{
author = "Żółtowski, Piotr and Dražić, Dragutin M. and Vorkapić, L. Ž.",
year = "1975",
abstract = "The short time overload capacity of the carbon-air electrode in a strongly alkaline electrolyte can be increased by addition of organic redox substances such as duroquinone (DQ) or 2-amino-1.4-naphthoquinone (ANQ). DQ, however, slowly decomposes in alkalies, while ANQ is quite stable even in 9M KOH. Small amounts of both quinones have a catalytic effect on the oxygen reduction at the carbon-air electrode.",
publisher = "Switzerland : Springer Nature",
journal = "Journal of Applied Electrochemistry",
title = "Carbon air electrode with regenerative short time overload capacity. II. Effects of duroquinone and 2-amino-1.4 naphthoquinone",
volume = "5",
number = "1",
pages = "79-87",
doi = "10.1007/BF00625962"
}

Żółtowski, P., Dražić, D. M.,& Vorkapić, L. Ž.. (1975). Carbon air electrode with regenerative short time overload capacity. II. Effects of duroquinone and 2-amino-1.4 naphthoquinone. in Journal of Applied Electrochemistry
Switzerland : Springer Nature., 5(1), 79-87.
https://doi.org/10.1007/BF00625962

Żółtowski P, Dražić DM, Vorkapić LŽ. Carbon air electrode with regenerative short time overload capacity. II. Effects of duroquinone and 2-amino-1.4 naphthoquinone. in Journal of Applied Electrochemistry. 1975;5(1):79-87.
doi:10.1007/BF00625962 .

Żółtowski, Piotr, Dražić, Dragutin M., Vorkapić, L. Ž., "Carbon air electrode with regenerative short time overload capacity. II. Effects of duroquinone and 2-amino-1.4 naphthoquinone" in Journal of Applied Electrochemistry, 5, no. 1 (1975):79-87,
https://doi.org/10.1007/BF00625962 . .

TY  - JOUR
AU  - Vorkapić, L. Ž.
AU  - Drozić, D. M.
AU  - Despić, Aleksandar R.
PY  - 1974
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4654
AB  - Corrosion of pure and amalgamated zinc in pure concentrated KOH solutions was investigated using two methods: (a) galvanostatic measurements of the kinetics of hydrogen evolution with electrodic assessment of corrosion properties of the system, and (b) volumetric measurement of the hydrogen evolution reflecting directly the rate of corrosion. The latter was followed as a function of time during 150 hr. It was found that the corrosion rate varies considerably with time and was suggested that different factors control the initial and the steady-state corrosion. The initial corrosion rate increases with increasing KOH concentration which is indicative of the chemical mechanism of hydrogen evolution. The change of the corrosion rate with time and the steady-state corrosion rate can be explained in terms of formation of an impermeable ZnO film at the surface. In such a case the concentration dependence of the corrosion rate is inverse with time, which explains some results reported in literature. The amalgamated zinc surface gives complex galvanostatic transients which indicate a new phase formation in the process of initiation of hydrogen evolution, which could pertain to some solid potassium-zinc-mercury alloy.
PB  - IOP Publishing
T2  - Journal of Electrochemical Society
T1  - Corrosion of Pure and Amalgamated Zinc in Concentrated Alkali Hydroxide Solutions
VL  - 121
IS  - 11
SP  - 1385
EP  - 1392
DO  - 10.1149/1.2401695
ER  - 

@article{
author = "Vorkapić, L. Ž. and Drozić, D. M. and Despić, Aleksandar R.",
year = "1974",
abstract = "Corrosion of pure and amalgamated zinc in pure concentrated KOH solutions was investigated using two methods: (a) galvanostatic measurements of the kinetics of hydrogen evolution with electrodic assessment of corrosion properties of the system, and (b) volumetric measurement of the hydrogen evolution reflecting directly the rate of corrosion. The latter was followed as a function of time during 150 hr. It was found that the corrosion rate varies considerably with time and was suggested that different factors control the initial and the steady-state corrosion. The initial corrosion rate increases with increasing KOH concentration which is indicative of the chemical mechanism of hydrogen evolution. The change of the corrosion rate with time and the steady-state corrosion rate can be explained in terms of formation of an impermeable ZnO film at the surface. In such a case the concentration dependence of the corrosion rate is inverse with time, which explains some results reported in literature. The amalgamated zinc surface gives complex galvanostatic transients which indicate a new phase formation in the process of initiation of hydrogen evolution, which could pertain to some solid potassium-zinc-mercury alloy.",
publisher = "IOP Publishing",
journal = "Journal of Electrochemical Society",
title = "Corrosion of Pure and Amalgamated Zinc in Concentrated Alkali Hydroxide Solutions",
volume = "121",
number = "11",
pages = "1385-1392",
doi = "10.1149/1.2401695"
}

Vorkapić, L. Ž., Drozić, D. M.,& Despić, A. R.. (1974). Corrosion of Pure and Amalgamated Zinc in Concentrated Alkali Hydroxide Solutions. in Journal of Electrochemical Society
IOP Publishing., 121(11), 1385-1392.
https://doi.org/10.1149/1.2401695

Vorkapić LŽ, Drozić DM, Despić AR. Corrosion of Pure and Amalgamated Zinc in Concentrated Alkali Hydroxide Solutions. in Journal of Electrochemical Society. 1974;121(11):1385-1392.
doi:10.1149/1.2401695 .

Vorkapić, L. Ž., Drozić, D. M., Despić, Aleksandar R., "Corrosion of Pure and Amalgamated Zinc in Concentrated Alkali Hydroxide Solutions" in Journal of Electrochemical Society, 121, no. 11 (1974):1385-1392,
https://doi.org/10.1149/1.2401695 . .

TY  - JOUR
AU  - Żółtowski, Piotr
AU  - Dražić, Dragutin M.
AU  - Vorkapić, L. Ž.
PY  - 1973
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4133
AB  - To increase the overload capacity of the carbon-air electrode in alkaline electrolyte, without seriously changing the electrode potential during short-time overload periods, small amounts of MnO2 were added to carbon and the effects investigated. The potentiodynamic investigations revealed the existence of two reducible manganese species with reduction potentials of about −280 mV and −400 mV. The second potential corresponds to the known reduction process Mn(III) → Mn(II) whilst the first one corresponds to a reversible process (the product is easily reoxidized by air or anodically), not reported in literature as yet. It was explained in terms of a new redox potential for the system Mn(III)/Mn(II), both species being strongly and irreversibly adsorbed at the carbon surface. The galvanostatic discharge curves in the absence of air indicate that a sufficient overload capacity of about 40 C cm−2 is available if 22% (wt) MnO2 is added. Steady-state polarization curves in the presence of air indicate the catalytic effect of small amounts of MnO2 for the oxygen reduction reaction.
PB  - Springer Nature
T2  - Journal of Applied Electrochemistry
T1  - Carbon-air electrode with regenerative short time overload capacity: Part 1. Effect of manganese dioxide
VL  - 3
IS  - 4
SP  - 271
EP  - 283
DO  - 10.1007/BF00613033
ER  - 

@article{
author = "Żółtowski, Piotr and Dražić, Dragutin M. and Vorkapić, L. Ž.",
year = "1973",
abstract = "To increase the overload capacity of the carbon-air electrode in alkaline electrolyte, without seriously changing the electrode potential during short-time overload periods, small amounts of MnO2 were added to carbon and the effects investigated. The potentiodynamic investigations revealed the existence of two reducible manganese species with reduction potentials of about −280 mV and −400 mV. The second potential corresponds to the known reduction process Mn(III) → Mn(II) whilst the first one corresponds to a reversible process (the product is easily reoxidized by air or anodically), not reported in literature as yet. It was explained in terms of a new redox potential for the system Mn(III)/Mn(II), both species being strongly and irreversibly adsorbed at the carbon surface. The galvanostatic discharge curves in the absence of air indicate that a sufficient overload capacity of about 40 C cm−2 is available if 22% (wt) MnO2 is added. Steady-state polarization curves in the presence of air indicate the catalytic effect of small amounts of MnO2 for the oxygen reduction reaction.",
publisher = "Springer Nature",
journal = "Journal of Applied Electrochemistry",
title = "Carbon-air electrode with regenerative short time overload capacity: Part 1. Effect of manganese dioxide",
volume = "3",
number = "4",
pages = "271-283",
doi = "10.1007/BF00613033"
}

Żółtowski, P., Dražić, D. M.,& Vorkapić, L. Ž.. (1973). Carbon-air electrode with regenerative short time overload capacity: Part 1. Effect of manganese dioxide. in Journal of Applied Electrochemistry
Springer Nature., 3(4), 271-283.
https://doi.org/10.1007/BF00613033

Żółtowski P, Dražić DM, Vorkapić LŽ. Carbon-air electrode with regenerative short time overload capacity: Part 1. Effect of manganese dioxide. in Journal of Applied Electrochemistry. 1973;3(4):271-283.
doi:10.1007/BF00613033 .

Żółtowski, Piotr, Dražić, Dragutin M., Vorkapić, L. Ž., "Carbon-air electrode with regenerative short time overload capacity: Part 1. Effect of manganese dioxide" in Journal of Applied Electrochemistry, 3, no. 4 (1973):271-283,
https://doi.org/10.1007/BF00613033 . .