ОСОБЕННОСТИ РАЗРЯДА-ИОНИЗАЦИИ МЕДИ ИЗ НИЗКОКОНЦЕНТРИРОВАННЫХ НИТРАТНЫХ РАСТВОРОВ
Електронний архів E-archive DonNTU – (Electronic archive Donetsk National Technical University)
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
ОСОБЕННОСТИ РАЗРЯДА-ИОНИЗАЦИИ МЕДИ ИЗ НИЗКОКОНЦЕНТРИРОВАННЫХ НИТРАТНЫХ РАСТВОРОВ
DISCHARGE-IONIZATION REGULARITIES IN LOW CONCENTRATION NITRATE SOLUTIONS |
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| Creator |
Правда, Алла Алексеевна
Радченкова, Анна Петровна Ларин, Василий Иванович |
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| Subject |
трилон Б
винная кислота медь нитратный электролит меднения комплексанты the disodium dihydrogen ethylenediaminetetraacetate, tartratic acid copper the copper nitrate solution complexing agents |
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| Description |
Установлены физико-химические закономерности влияния малых концентраций комплексантов на процесс разряда-ионизации меди в разбавленных нитратных растворах, позволяющих получать медь в компактной форме. Показано ингибирующее действие низких концентраций трилона Б и винной кислоты по отношению к реакции катодного восстановления нитрат-ионов, их влияние на структуру и другие свойства электролитических осадков меди. Обнаружено и исследовано включение добавок в медные покрытия, что является подтверждением концепции о непосредственном участии комплексов в катодном процессе.
Physico-chemical regularities of complexing agents low concentration influence on copper discharge-ionization process in dilute nitrate solutions have been established, that permits to evolve copper in compact form. The electrolytic deposition of dense copper layers from the nitrate solutions is possible only on the condition of eliminating parallel cathodic reduction of ions. We found that the problem can be solved by adding to the nitrate solution of a small amount of complexing agents or anions which are absorbed at the interface and substitute for ions in the double-electric layer and provide more stable complexes than the nitrate ones. The inhibitor effect of the disodium dihydrogen ethylenediaminetetraacetate and tartratic acid on nitrate ion cathode reduction and their influence on copper electrolyte precipitate structure and properties have been shown. As was expected based on modern ideas as to the direct acting of complexes in cathodic reactions, practically all the additives studied were found to be included in the electrolytic deposit. Correlation was found between additive inclusions in the cathodic copper deposit and the stability of complexes formed in the solution, which due to adsorption substitute for the nitrate ions in the double-electric layer. As a consequence, cathodic reduction of the nitrate ions is eliminated and normal conditions are created for copper electrocrystallization and forming of dense, fine-grained shining deposits of copper from the copper nitrate solution. The obtained results contribute to our knowledge of the processes in redox nitrate systems, of the role of coordination and adsorption in the mechanism of electrolytic copper deposition and the effect of anionic nature on the electrolytic copper structure. |
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| Date |
2013-04-10T17:03:47Z
2013-04-10T17:03:47Z 2013 |
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| Type |
Article
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| Identifier |
2074-6652
УДК 541.135 http://ea.donntu.edu.ua/handle/123456789/18377 |
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| Relation |
Наукові праці ДонНТУ;Серія: Хімія і хімічна технологія, 2013. - Вип.1(20). - С.82-89
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| Publisher |
Донецк, ДонНТУ
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