TY  - JOUR
AU  - Bučko, Mihael
AU  - Riđošić, Marija
AU  - Kovačina, Jovanka
AU  - Tomić, Milorad V.
AU  - Bajat, Jelena
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5312
AB  - The aim of this study is development and characterization of the novel Zn-Mn/Al2O3 composite coatings. The coatings 
were electrodeposited with constant current density on steel, from chloride solution, without any commercial additives. The 
Zn−Mn alloy coatings that show high corrosion resistance, may be used in future as an alternative to cadmium coatings. 
However, the pure Zn and Zn alloy coatings are characterized with poor mechanical properties. Therefore, in this work the 
alumina particles were incorporated into the Zn-Mn matrix, and the hardness and corrosion resistance of the obtained 
composite coatings were tested. The mechanical and ultrasound agitation were used to achieve good dispersion of plating 
solution and homogeneous co-deposition of second phase. The goal was to examine the effect of the agitation type in bath, 
on the attributes of the deposited composite coatings. The incorporation of Al2O3 particles was enhanced when the 
mechanical agitation of the solution was applied. However, in case that this agitation method was used, the agglomeration of 
the alumina particles occurred. In contrast, when an ultrasonic agitation of the plating solution was applied, the uniform 
distribution of the alumina particles could be achieved. The presence of particles in the matrix, along with applied 
ultrasound, resulted in grain refinement and homogeneous microstructure. The Al2O3 nanoparticles incorporated in Zn-Mn 
alloy matrix, resulted in a significant increment in the indentation hardness and a modest increase in the coating corrosion 
resistance. However, the coating hardness increased with alumina addition, only in case when an ultrasonic agitation of the 
electrodeposition solution was used.
PB  - National Institute of Science Communication and Policy Research
T2  - Indian Journal of Engineering & Materials Sciences
T1  - Hardness and corrosion resistance of Zn−Mn/Al2O3 composite coatings  produced by electrochemical deposition
VL  - 29
SP  - 540
EP  - 549
DO  - 10.56042/ijems.v29i4.47785
ER  - 

@article{
author = "Bučko, Mihael and Riđošić, Marija and Kovačina, Jovanka and Tomić, Milorad V. and Bajat, Jelena",
year = "2022",
abstract = "The aim of this study is development and characterization of the novel Zn-Mn/Al2O3 composite coatings. The coatings 
were electrodeposited with constant current density on steel, from chloride solution, without any commercial additives. The 
Zn−Mn alloy coatings that show high corrosion resistance, may be used in future as an alternative to cadmium coatings. 
However, the pure Zn and Zn alloy coatings are characterized with poor mechanical properties. Therefore, in this work the 
alumina particles were incorporated into the Zn-Mn matrix, and the hardness and corrosion resistance of the obtained 
composite coatings were tested. The mechanical and ultrasound agitation were used to achieve good dispersion of plating 
solution and homogeneous co-deposition of second phase. The goal was to examine the effect of the agitation type in bath, 
on the attributes of the deposited composite coatings. The incorporation of Al2O3 particles was enhanced when the 
mechanical agitation of the solution was applied. However, in case that this agitation method was used, the agglomeration of 
the alumina particles occurred. In contrast, when an ultrasonic agitation of the plating solution was applied, the uniform 
distribution of the alumina particles could be achieved. The presence of particles in the matrix, along with applied 
ultrasound, resulted in grain refinement and homogeneous microstructure. The Al2O3 nanoparticles incorporated in Zn-Mn 
alloy matrix, resulted in a significant increment in the indentation hardness and a modest increase in the coating corrosion 
resistance. However, the coating hardness increased with alumina addition, only in case when an ultrasonic agitation of the 
electrodeposition solution was used.",
publisher = "National Institute of Science Communication and Policy Research",
journal = "Indian Journal of Engineering & Materials Sciences",
title = "Hardness and corrosion resistance of Zn−Mn/Al2O3 composite coatings  produced by electrochemical deposition",
volume = "29",
pages = "540-549",
doi = "10.56042/ijems.v29i4.47785"
}

Bučko, M., Riđošić, M., Kovačina, J., Tomić, M. V.,& Bajat, J.. (2022). Hardness and corrosion resistance of Zn−Mn/Al2O3 composite coatings  produced by electrochemical deposition. in Indian Journal of Engineering & Materials Sciences
National Institute of Science Communication and Policy Research., 29, 540-549.
https://doi.org/10.56042/ijems.v29i4.47785

Bučko M, Riđošić M, Kovačina J, Tomić MV, Bajat J. Hardness and corrosion resistance of Zn−Mn/Al2O3 composite coatings  produced by electrochemical deposition. in Indian Journal of Engineering & Materials Sciences. 2022;29:540-549.
doi:10.56042/ijems.v29i4.47785 .

Bučko, Mihael, Riđošić, Marija, Kovačina, Jovanka, Tomić, Milorad V., Bajat, Jelena, "Hardness and corrosion resistance of Zn−Mn/Al2O3 composite coatings  produced by electrochemical deposition" in Indian Journal of Engineering & Materials Sciences, 29 (2022):540-549,
https://doi.org/10.56042/ijems.v29i4.47785 . .

TY  - JOUR
AU  - Bučko, Mihael
AU  - Stevanović, Sanja
AU  - Bajat, Jelena
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2277
AB  - Well adhered, homogenous coatings were obtained from deep eutectic solvents (DES) based on choline chloride and urea, at current densities up to 20 mA cm-2. The coatings' morphology was analyzed by atomic force microscopy, determining the agglomerates size and distribution. The corrosion stability of these deposits was analyzed in 3 wt. % NaCl solution by electrochemical impedance spectroscopy and polarization measurements, and compared with coatings deposited from a conventional water-based electrolyte. The influence of deposition current density and surface morphology, as well as of DES type, on the corrosion resistance was analyzed. It was shown that electrodeposition from DES enables incorporation of greater Mn amounts, that induced a pseudo-passivation effect, which, in turn, resulted in superior corrosion resistance.
AB  - Elektrohemijskim taloženjem iz eutektičke smeše na bazi holin hlorida i uree, gustinama struje taloženja do 20 mA cm-2 dobijene su homogene prevlake Zn-Mn legure, dobre adhezije na čeliku. Morfologija dobijenih prevlaka je ispitivana mikroskopijom međuatomskih sila. Određene su veličine aglomerata kristalnih zrna i njihova raspodela po površini u zavisnosti od vrste rastvora za taloženje i gustine struje taloženja. Koroziona stabilnost prevlaka legura je ispitivana spektroskopijom elektrohemijske impedancije i polarizacionim merenjima u rastvoru 3 % NaCl i upoređena je sa svojstvima prevlaka dobijenih elektrohemijskim taloženjem iz vodenih rastvora. Pokazan je uticaj gustine struje taloženja, morfologije prevlaka, kao i vrste eutektičke smeše, na otpornost elektrohemijski taloženih prevlaka legura prema koroziji. Elektrohemijskim taloženjem iz eutektičkih smeša je moguće dobiti prevlake Zn-Mn legure sa većim sadržajem Mn, koje dovode do pojave pseudo-pasivnog sloja na površini, povećavajući njihovu korozionu stabilnost.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Tailoring the corrosion resistance of Zn-Mn coating by electrodeposition from deep eutectic solvents
T1  - Poboljšanje korozione postojanosti Zn-Mn prevlake, elektrohemijskim taloženjem iz dubokih eutektičkih smeša
VL  - 59
IS  - 2
SP  - 173
EP  - 181
DO  - 10.5937/ZasMat1802173B
ER  - 

@article{
author = "Bučko, Mihael and Stevanović, Sanja and Bajat, Jelena",
year = "2018",
abstract = "Well adhered, homogenous coatings were obtained from deep eutectic solvents (DES) based on choline chloride and urea, at current densities up to 20 mA cm-2. The coatings' morphology was analyzed by atomic force microscopy, determining the agglomerates size and distribution. The corrosion stability of these deposits was analyzed in 3 wt. % NaCl solution by electrochemical impedance spectroscopy and polarization measurements, and compared with coatings deposited from a conventional water-based electrolyte. The influence of deposition current density and surface morphology, as well as of DES type, on the corrosion resistance was analyzed. It was shown that electrodeposition from DES enables incorporation of greater Mn amounts, that induced a pseudo-passivation effect, which, in turn, resulted in superior corrosion resistance., Elektrohemijskim taloženjem iz eutektičke smeše na bazi holin hlorida i uree, gustinama struje taloženja do 20 mA cm-2 dobijene su homogene prevlake Zn-Mn legure, dobre adhezije na čeliku. Morfologija dobijenih prevlaka je ispitivana mikroskopijom međuatomskih sila. Određene su veličine aglomerata kristalnih zrna i njihova raspodela po površini u zavisnosti od vrste rastvora za taloženje i gustine struje taloženja. Koroziona stabilnost prevlaka legura je ispitivana spektroskopijom elektrohemijske impedancije i polarizacionim merenjima u rastvoru 3 % NaCl i upoređena je sa svojstvima prevlaka dobijenih elektrohemijskim taloženjem iz vodenih rastvora. Pokazan je uticaj gustine struje taloženja, morfologije prevlaka, kao i vrste eutektičke smeše, na otpornost elektrohemijski taloženih prevlaka legura prema koroziji. Elektrohemijskim taloženjem iz eutektičkih smeša je moguće dobiti prevlake Zn-Mn legure sa većim sadržajem Mn, koje dovode do pojave pseudo-pasivnog sloja na površini, povećavajući njihovu korozionu stabilnost.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Tailoring the corrosion resistance of Zn-Mn coating by electrodeposition from deep eutectic solvents, Poboljšanje korozione postojanosti Zn-Mn prevlake, elektrohemijskim taloženjem iz dubokih eutektičkih smeša",
volume = "59",
number = "2",
pages = "173-181",
doi = "10.5937/ZasMat1802173B"
}

Bučko, M., Stevanović, S.,& Bajat, J.. (2018). Tailoring the corrosion resistance of Zn-Mn coating by electrodeposition from deep eutectic solvents. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 59(2), 173-181.
https://doi.org/10.5937/ZasMat1802173B

Bučko M, Stevanović S, Bajat J. Tailoring the corrosion resistance of Zn-Mn coating by electrodeposition from deep eutectic solvents. in Zaštita materijala. 2018;59(2):173-181.
doi:10.5937/ZasMat1802173B .

Bučko, Mihael, Stevanović, Sanja, Bajat, Jelena, "Tailoring the corrosion resistance of Zn-Mn coating by electrodeposition from deep eutectic solvents" in Zaštita materijala, 59, no. 2 (2018):173-181,
https://doi.org/10.5937/ZasMat1802173B . .

TY  - JOUR
AU  - Bučko, Mihael M.
AU  - Stevanović, Sanja
AU  - Tomić, Milorad V.
AU  - Pavlović, Miomir
AU  - Bajat, Jelena
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/895
AB  - The 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.
AB  - U 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.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - The peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyte
T1  - Specifičnosti elektrohemijskog taloženja i morfologija Zn-Mn prevlaka dobijenih iz pirofosfatnog elektrolita
VL  - 65
IS  - 3
SP  - 295
EP  - 303
DO  - 10.2298/HEMIND101214003B
ER  - 

@article{
author = "Bučko, Mihael M. and Stevanović, Sanja and Tomić, Milorad V. and Pavlović, Miomir and Bajat, Jelena",
year = "2011",
abstract = "The 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., U 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.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "The peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyte, Specifičnosti elektrohemijskog taloženja i morfologija Zn-Mn prevlaka dobijenih iz pirofosfatnog elektrolita",
volume = "65",
number = "3",
pages = "295-303",
doi = "10.2298/HEMIND101214003B"
}

Bučko, M. M., Stevanović, S., Tomić, M. V., Pavlović, M.,& Bajat, J.. (2011). The peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyte. in Hemijska industrija
Association of Chemical Engineers of Serbia., 65(3), 295-303.
https://doi.org/10.2298/HEMIND101214003B

Bučko MM, Stevanović S, Tomić MV, Pavlović M, Bajat J. The peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyte. in Hemijska industrija. 2011;65(3):295-303.
doi:10.2298/HEMIND101214003B .

Bučko, Mihael M., Stevanović, Sanja, Tomić, Milorad V., Pavlović, Miomir, Bajat, Jelena, "The peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyte" in Hemijska industrija, 65, no. 3 (2011):295-303,
https://doi.org/10.2298/HEMIND101214003B . .