vestichИзвестия Национальной академии наук Беларуси. Серия химических наукProceedings of the National Academy of Sciences of Belarus, Chemical Series1561-83312524-2342The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"vestich-284Research ArticleНЕОРГАНИЧЕСКАЯ ХИМИЯINORGANIC CHEMISTRYКОРРОЗИОННАЯ СТОЙКОСТЬ ЛЕГИРОВАННЫХ ВАНАДИЕМ ГАЛЬВАНИЧЕСКИХ ЦИНКОВЫХ ПОКРЫТИЙCORROSION RESISTANCE OF VANADIUM-ALLOYED ZINC GALVANIZED COATINGSАкуличН. Е.AkulichN. E.

аспирант

ул. Свердлова, 13а, 220006

Postgraduate student

13a, Sverdlov Str., 220006

akulitch.nadejda@yandex.ruЖарскийИ. М.ZharskyI. M.

канд. хим. наук, профессор

ул. Свердлова, 13а, 220006

Ph. D. (Chemistry), Professor

13a, Sverdlov Str., 220006

root@belstu.byИвановаН. П.IvanovaN. P.

канд. хим. наук, доцент

ул. Свердлова, 13а, 220006

Ph. D. (Chemistry), Associate Professor

13a, Sverdlov Str., 220006

nataliaivanova1@rambler.ruБелорусский государственный технологический университет, МинскBelarusian State Technological University, Minsk201713122017042330Copyright © Акулич Н.Е., Жарский И.М., Иванова Н.П., 20172017Акулич Н.Е., Жарский И.М., Иванова Н.П.Akulich N.E., Zharsky I.M., Ivanova N.P.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestichem.belnauka.by/jour/article/view/284

Показана возможность электрохимического осаждения легированного ванадием цинкового покрытия из щелочного электролита с содержанием 5,5 г/дм3 Na3VO4. Содержание ванадия в цинковом покрытии находится в пределах 1,5–4,1 % при катодной плотности тока осаждения покрытия 1–3 А/дм2 . Изучен процесс химической пассивации гальванических покрытий в растворе ванадата натрия при температуре 20–40 °С, значение рН которого поддерживалось равным 3 ортофосфорной кислотой. Методом РФА в составе образованных конверсионных покрытий обнаружены Zn, ZnO, V2O5, V(HPO4)2, Zn3(PO4)2. Ток коррозии пассивированных легированных цинковых покрытий, осажденных при 2 А/дм2, в 3 %-ном растворе хлорида натрия снижается в 4,1–12,6 раза по сравнению с непассивированным покрытием. Показано, что конверсионные покрытия на основе ванадия обладают высокой защитной способностью при воздействии раствора ацетата свинца (50 г/дм3 ). 

The possibility of vanadium-alloyed zinc coatings electrochemical deposition from alkaline electrolyte containing 5.5 g/l Na3VO4 has been shown. Vanadium content in zinc coating depends on cathodic current density and is 1.5–4.1% under cathodic deposition current 1–3 A/dm2. The process of chemical passivation of galvanic coating have been studied in sodium vanadate solution at 20–40 °C temperature, with pH 3 kept constant by phosphoric acid. It has been shown by XRD method that conversion coatings formed consist of Zn, ZnO, V2O5, V(HPO4)2, Zn3(PO4)2. The corrosion current of passivated alloyed zinc coatings deposited at 2 A/dm2 was 4.1–12.6 times less than corrosion current of alloyed zinc in 3% NaCl solution. Conversion coatings demonstrate high protective ability when treated with lead acetate solution (50 g/dm3 ). 

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The authors declare that there are no conflicts of interest present.