ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ
The methods of stationary voltammetry and chronovoltammetry have been used to study deposition processes of ternary CoWRe alloys at different rhenium content of the electrolyte and deposition current density. It has been found that the limiting currents have a diffusive nature and are proportional t...
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| Дата: | 2019 |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2019
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Ukrainian Chemistry Journal| id |
oai:ojs2.1444248.nisspano.web.hosting-test.net:article-32 |
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Ukrainian Chemistry Journal |
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2019-05-28T09:01:19Z |
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OJS |
| language |
English |
| topic |
alloy cobalt tungsten rhenium electrodeposition corrosion resistance. |
| spellingShingle |
alloy cobalt tungsten rhenium electrodeposition corrosion resistance. Yapontseva, Yuliya Kublanovsky, Valeriy Maltseva, Tetiana ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ |
| topic_facet |
alloy cobalt tungsten rhenium electrodeposition corrosion resistance. alloy cobalt tungsten rhenium electrodeposition corrosion resistance. alloy cobalt tungsten rhenium electrodeposition corrosion resistance. |
| format |
Article |
| author |
Yapontseva, Yuliya Kublanovsky, Valeriy Maltseva, Tetiana |
| author_facet |
Yapontseva, Yuliya Kublanovsky, Valeriy Maltseva, Tetiana |
| author_sort |
Yapontseva, Yuliya |
| title |
ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ |
| title_short |
ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ |
| title_full |
ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ |
| title_fullStr |
ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ |
| title_full_unstemmed |
ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ |
| title_sort |
особливості електроосадження сплава кобальт–вольфрам–реній |
| title_alt |
PECULIARITIES OF ELECTRODEPOSITION OF COBALT-TUNGSTEN-RHENIUM ALLOY ОСОБЕННОСТИ ЭЛЕКТРООСАЖДЕНИЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНИЙ |
| description |
The methods of stationary voltammetry and chronovoltammetry have been used to study deposition processes of ternary CoWRe alloys at different rhenium content of the electrolyte and deposition current density. It has been found that the limiting currents have a diffusive nature and are proportional to the concentration of perrhenate ions in the electrolyte. The CoWRe alloys should be formed by the discharge of bimetallic citrate complexes of the following composition [(Co)(WO4)(H)(Cit)]2- and rhenium electrodeposition. Rhenium does not form complexes with citrate ions and deposits better in an alloy with iron group metals than in the form of an individual metal from a perrhenate solution. It can be assumed that the discharge of rhenium into the alloy occurs from a surface complex, the nature of which has not yet been established. The alloy current efficiency reaches 93% due to the high overpotential of hydrogen evolution on the alloy surface. According to the results of investigations of the catalytic properties of alloys in the hydrogen reduction reaction, it has been found that with increasing the rhenium content of the electrolyte and alloy, an increase in hydrogen overpotential is observed. Based on the Tafel coefficients found, it was found that in an acidic and neutral medium, the limiting stage of the cathodic and anodic reaction is the transfer of the first electron. In an alkaline medium, the anode process is complicated by the simultaneous transport of two electrons. The found values of corrosion resistance are 1-2 kOm·cm-2 in solutions of 0.01 M H2SO4; 20-110 kOm·cm-2 in 2.5% NaCl; 10-30 kOm·cm-2 in 1.0 M KOH. Based on the dependence of corrosion resistance on the refractory metals content of the alloy and the electrodeposition conditions, the optimum deposition current density of 10 mA·cm-2 has been found. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2019 |
| url |
https://ucj.org.ua/index.php/journal/article/view/32 |
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2025-09-24T17:43:28Z |
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-322019-05-28T09:01:19Z PECULIARITIES OF ELECTRODEPOSITION OF COBALT-TUNGSTEN-RHENIUM ALLOY ОСОБЕННОСТИ ЭЛЕКТРООСАЖДЕНИЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНИЙ ОСОБЛИВОСТІ ЕЛЕКТРООСАДЖЕННЯ СПЛАВА КОБАЛЬТ–ВОЛЬФРАМ–РЕНІЙ Yapontseva, Yuliya Kublanovsky, Valeriy Maltseva, Tetiana alloy, cobalt, tungsten, rhenium, electrodeposition, corrosion resistance. alloy, cobalt, tungsten, rhenium, electrodeposition, corrosion resistance. alloy, cobalt, tungsten, rhenium, electrodeposition, corrosion resistance. The methods of stationary voltammetry and chronovoltammetry have been used to study deposition processes of ternary CoWRe alloys at different rhenium content of the electrolyte and deposition current density. It has been found that the limiting currents have a diffusive nature and are proportional to the concentration of perrhenate ions in the electrolyte. The CoWRe alloys should be formed by the discharge of bimetallic citrate complexes of the following composition [(Co)(WO4)(H)(Cit)]2- and rhenium electrodeposition. Rhenium does not form complexes with citrate ions and deposits better in an alloy with iron group metals than in the form of an individual metal from a perrhenate solution. It can be assumed that the discharge of rhenium into the alloy occurs from a surface complex, the nature of which has not yet been established. The alloy current efficiency reaches 93% due to the high overpotential of hydrogen evolution on the alloy surface. According to the results of investigations of the catalytic properties of alloys in the hydrogen reduction reaction, it has been found that with increasing the rhenium content of the electrolyte and alloy, an increase in hydrogen overpotential is observed. Based on the Tafel coefficients found, it was found that in an acidic and neutral medium, the limiting stage of the cathodic and anodic reaction is the transfer of the first electron. In an alkaline medium, the anode process is complicated by the simultaneous transport of two electrons. The found values of corrosion resistance are 1-2 kOm·cm-2 in solutions of 0.01 M H2SO4; 20-110 kOm·cm-2 in 2.5% NaCl; 10-30 kOm·cm-2 in 1.0 M KOH. Based on the dependence of corrosion resistance on the refractory metals content of the alloy and the electrodeposition conditions, the optimum deposition current density of 10 mA·cm-2 has been found. The methods of stationary voltammetry and chronovoltammetry have been used to study deposition processes of ternary CoWRe alloys at different rhenium content of the electrolyte and deposition current density. It has been found that the limiting currents have a diffusive nature and are proportional to the concentration of perrhenate ions in the electrolyte. The CoWRe alloys should be formed by the discharge of bimetallic citrate complexes of the following composition [(Co)(WO4)(H)(Cit)]2- and rhenium electrodeposition. Rhenium does not form complexes with citrate ions and deposits better in an alloy with iron group metals than in the form of an individual metal from a perrhenate solution. It can be assumed that the discharge of rhenium into the alloy occurs from a surface complex, the nature of which has not yet been established. The alloy current efficiency reaches 93% due to the high overpotential of hydrogen evolution on the alloy surface. According to the results of investigations of the catalytic properties of alloys in the hydrogen reduction reaction, it has been found that with increasing the rhenium content of the electrolyte and alloy, an increase in hydrogen overpotential is observed. Based on the Tafel coefficients found, it was found that in an acidic and neutral medium, the limiting stage of the cathodic and anodic reaction is the transfer of the first electron. In an alkaline medium, the anode process is complicated by the simultaneous transport of two electrons. The found values of corrosion resistance are 1-2 kOm·cm-2 in solutions of 0.01 M H2SO4; 20-110 kOm·cm-2 in 2.5% NaCl; 10-30 kOm·cm-2 in 1.0 M KOH. Based on the dependence of corrosion resistance on the refractory metals content of the alloy and the electrodeposition conditions, the optimum deposition current density of 10 mA·cm-2 has been found. Methods of stationary voltammetry and chronovoltammetry were used to study deposition processes of ternary CoWRe alloys at the different rhenium content of the electrolyte and deposition current density. It has been found that the limiting currents have a diffusive nature and are proportional to the concentration of perrhenate ions in the electrolyte. CoWRe alloys should be formed by the discharge of bimetallic citrate complexes of the composition [(Co)(WO4)(HCit)]2- and rhenium electrodeposition. Rhenium does not form complexes with citrate ions and deposits better in an alloy with iron group metals than in the form of an individual metal from a perrhenate solution. It can be assumed that the discharge of rhenium into the alloy occurs from a surface complex, the nature of which has not yet been established. The alloy current efficiency reaches 93% due to the high overpotential of hydrogen evolution on the alloy surface. According to the results of investigations of the catalytic properties of alloys in the hydrogen reduction reaction, it has been found that with increasing the rhenium content of the electrolyte and alloy, an increase in hydrogen overpotential is observed. Based on the Tafel coefficients found, it was found that in an acidic and neutral medium, the limiting stage of the cathodic and anodic reaction is the transfer of the first electron. In an alkaline medium, the anode process is complicated by the simultaneous transport of two electrons. The found values of corrosion resistance are 1-2 kOm·cm-2 in solutions of 0.01 M H2SO4; 20-110 kOm·cm-2 in 2.5% NaCl; 10-30 kOm·cm-2 in 1.0 M KOH. Based on the dependence of corrosion resistance on the refractory metals content of the alloy and the electrodeposition conditions, the optimum deposition current density of 10 mA·cm-2 has been found. V.I.Vernadsky Institute of General and Inorganic Chemistry 2019-02-15 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/32 10.33609/0041-6045.85.2.2019.80-87 Ukrainian Chemistry Journal; Vol 85 No 2 (2019): Ukrainian Chemistry Journal; 80-87 Украинский химический журнал; Том 85 № 2 (2019): Украинский химический журнал; 80-87 Український хімічний журнал; Том 85 № 2 (2019): Український хімічний журнал; 80-87 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/32/14 |