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Specifičnosti elektrohemijskog taloženja i morfologija Zn-Mn prevlaka dobijenih iz pirofosfatnog elektrolita

dc.creatorBučko, Mihael M.
dc.creatorStevanović, Sanja
dc.creatorTomić, Milorad V.
dc.creatorPavlović, Miomir
dc.creatorBajat, Jelena
dc.date.accessioned2019-01-30T17:28:08Z
dc.date.available2019-01-30T17:28:08Z
dc.date.issued2011
dc.identifier.issn0367-598X
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/895
dc.description.abstractThe first successful attempt to electrodeposit Zn-Mn alloy coatings from alkaline bath was made only a few years ago. In this kind of solution, potassium pyrophosphate (K4P2O7) serves both as a complexing agent and as the basic electrolyte. The aim of this work was to study the electrodeposition process and properties of Zn-Mn alloy coatings deposited from pyrophosphate solution, with a new kind of alkaline pyrophosphate bath. Namely, chloride salts were used as the source of metal ions and ascorbic acid was used as reducing agent. The composition of the plating solution was as follows: 1 mol dm-3 K4P2O7 + 0.017 mol dm-3 ascorbic acid + 0.05 mol dm-3 ZnCl2 + 0.05 mol dm-3 MnCl2·4H2O. Cathodic processes during the alloy electrodeposition were investigated using linear voltammetry. The influence of addition of small amounts of ascorbic acid on the cathodic processes was established. It was shown that this substance inhibits hydrogen evolution and increases the current efficiency of alloy deposition. The current efficiency in the plating bath examined was in the range of 25 and 30%, which was quite higher as compared to the results reported in the literature for electrodeposition of Zn-Mn alloy from pyrophosphate bath. Electrodeposition of Zn-Mn alloys was performed galvanostatically on steel panels, at current densities of 20?120 mA cm-2. The coatings with the best appearance were obtained at current densities between 30 and 80 mA cm-2. The surface morphology studies, based on atomic force microscopy measurements, showed that morphology of the deposits is highly influenced by deposition current density. Zn-Mn coating deposited at 30 mA cm-2 was more compact and possessed more homogeneous structure (more uniform agglomeration size) than the coating deposited at 80 mA cm-2. Such dependence of morphology on the current density could be explained by the high rate of hydrogen evolution reaction during the electrodeposition process.en
dc.description.abstractU proteklih nekoliko godina pokazano je da se alkalni pirofosfatni elektrolit može primeniti za elektrohemijsko taloženje prevlaka Zn-Mn legura na čeliku. U ovom radu je ispitana zavisnost morfologije i hemijskog sastava Zn-Mn prevlaka od primenjene gustine struje taloženja. Karakterizacija prevlaka vršena je mikroskopijom atomskih sila i energetskom disperzionom atomskom analizom. Metodom linearne voltametrije ispitan je uticaj dodatka, askorbinske kiseline, na katodne procese. Utvrđeno je da se iz alkalnog rastvora mogu dobiti prevlake zadovoljavajućeg kvaliteta, ali da gustina struje ima veliki uticaj na homogenost i hrapavost površine Zn-Mn prevlaka. Askorbinska kiselina inhibira redukciju vodonika i povećava iskorišćenje struje za taloženje legure.sr
dc.publisherAssociation of Chemical Engineers of Serbia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceHemijska industrija
dc.subjectZn-Mn alloysen
dc.subjectcoatingsen
dc.subjectelectrochemical depositionen
dc.subjectsurface characterizationen
dc.subjectatomic force microscopyen
dc.subjectZn-Mn leguresr
dc.subjectprevlakesr
dc.subjectelektrohemijsko taloženjesr
dc.subjectkarakterizacija površinesr
dc.subjectmikroskopija atomskih silasr
dc.titleThe peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyteen
dc.titleSpecifičnosti elektrohemijskog taloženja i morfologija Zn-Mn prevlaka dobijenih iz pirofosfatnog elektrolitasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractБучко, Михаел М.; Бајат, Јелена Б.; Павловић, Миомир; Стевановић, Сања; Томић, Милорад В.; Специфичности електрохемијског таложења и морфологија Зн-Мн превлака добијених из пирофосфатног електролита; Специфичности електрохемијског таложења и морфологија Зн-Мн превлака добијених из пирофосфатног електролита;
dc.citation.volume65
dc.citation.issue3
dc.citation.spage295
dc.citation.epage303
dc.citation.other65(3): 295-303
dc.citation.rankM23
dc.identifier.doi10.2298/HEMIND101214003B
dc.identifier.rcubConv_411
dc.identifier.fulltexthttp://cer.ihtm.bg.ac.rs//bitstream/id/9482/893.pdf
dc.identifier.scopus2-s2.0-79960289247
dc.identifier.wos000296999600011
dc.type.versionpublishedVersion


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