The study of Zn–Co alloy coatings electrochemically deposited by pulse current
The electrochemical deposition by pulse current of Zn-Co alloy coatings on steel was examined, with the aim to find out whether pulse plating could produce alloys that could offer a better corrosion protection. The influence of on-time and the average current density on the cathodic current effi...
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| Format: | Article |
| Language: | English |
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Association of Chemical Engineers of Serbia
2012-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2012/0367-598X1200035B.pdf |
| _version_ | 1818002292778991616 |
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| author | Tomić Milorad V. Bajat Jelena B. Maksimović Miodrag D. Pavlović Miomir G. |
| author_facet | Tomić Milorad V. Bajat Jelena B. Maksimović Miodrag D. Pavlović Miomir G. |
| author_sort | Tomić Milorad V. |
| collection | DOAJ |
| description | The electrochemical deposition by pulse current of Zn-Co alloy coatings on steel was examined, with the aim to find out whether pulse plating could produce alloys that could offer a better corrosion protection. The influence of on-time and the average current density on the cathodic current efficiency, coating morphology, surface roughness and corrosion stability in 3% NaCl was examined. At the same Ton/Toff ratio the current efficiency was insignificantly smaller for deposition at higher average current density. It was shown that, depending on the on-time, pulse plating could produce more homogenous alloy coatings with finer morphology, as compared to deposits obtained by direct current. The surface roughness was the greatest for Zn-Co alloy coatings deposited with direct current, as compared with alloy coatings deposited with pulse current, for both examined average current densities. It was also shown that Zn-Co alloy coatings deposited by pulse current could increase the corrosion stability of Zn-Co alloy coatings on steel. Namely, alloy coatings deposited with pulse current showed higher corrosion stability, as compared with alloy coatings deposited with direct current, for almost all examined cathodic times, Ton. Alloy coatings deposited at higher average current density showed greater corrosion stability as compared with coatings deposited by pulse current at smaller average current density. It was shown that deposits obtained with pulse current and cathodic time of 10 ms had the poorest corrosion stability, for both investigated average deposition current density. Among all investigated alloy coatings the highest corrosion stability was obtained for Zn-Co alloy coatings deposited with pulsed current at higher average current density (jav = 4 A dm-2). |
| first_indexed | 2024-04-14T03:43:54Z |
| format | Article |
| id | doaj.art-0fa07b057ac54f41a027e245f4dc23e9 |
| institution | Directory Open Access Journal |
| issn | 0367-598X |
| language | English |
| last_indexed | 2024-04-14T03:43:54Z |
| publishDate | 2012-01-01 |
| publisher | Association of Chemical Engineers of Serbia |
| record_format | Article |
| series | Hemijska Industrija |
| spelling | doaj.art-0fa07b057ac54f41a027e245f4dc23e92022-12-22T02:14:21ZengAssociation of Chemical Engineers of SerbiaHemijska Industrija0367-598X2012-01-0166574975710.2298/HEMIND111215035BThe study of Zn–Co alloy coatings electrochemically deposited by pulse currentTomić Milorad V.Bajat Jelena B.Maksimović Miodrag D.Pavlović Miomir G.The electrochemical deposition by pulse current of Zn-Co alloy coatings on steel was examined, with the aim to find out whether pulse plating could produce alloys that could offer a better corrosion protection. The influence of on-time and the average current density on the cathodic current efficiency, coating morphology, surface roughness and corrosion stability in 3% NaCl was examined. At the same Ton/Toff ratio the current efficiency was insignificantly smaller for deposition at higher average current density. It was shown that, depending on the on-time, pulse plating could produce more homogenous alloy coatings with finer morphology, as compared to deposits obtained by direct current. The surface roughness was the greatest for Zn-Co alloy coatings deposited with direct current, as compared with alloy coatings deposited with pulse current, for both examined average current densities. It was also shown that Zn-Co alloy coatings deposited by pulse current could increase the corrosion stability of Zn-Co alloy coatings on steel. Namely, alloy coatings deposited with pulse current showed higher corrosion stability, as compared with alloy coatings deposited with direct current, for almost all examined cathodic times, Ton. Alloy coatings deposited at higher average current density showed greater corrosion stability as compared with coatings deposited by pulse current at smaller average current density. It was shown that deposits obtained with pulse current and cathodic time of 10 ms had the poorest corrosion stability, for both investigated average deposition current density. Among all investigated alloy coatings the highest corrosion stability was obtained for Zn-Co alloy coatings deposited with pulsed current at higher average current density (jav = 4 A dm-2).http://www.doiserbia.nb.rs/img/doi/0367-598X/2012/0367-598X1200035B.pdfzinc-cobalt alloyscoatingselectro-depositionpulse currentcorrosion stability |
| spellingShingle | Tomić Milorad V. Bajat Jelena B. Maksimović Miodrag D. Pavlović Miomir G. The study of Zn–Co alloy coatings electrochemically deposited by pulse current Hemijska Industrija zinc-cobalt alloys coatings electro-deposition pulse current corrosion stability |
| title | The study of Zn–Co alloy coatings electrochemically deposited by pulse current |
| title_full | The study of Zn–Co alloy coatings electrochemically deposited by pulse current |
| title_fullStr | The study of Zn–Co alloy coatings electrochemically deposited by pulse current |
| title_full_unstemmed | The study of Zn–Co alloy coatings electrochemically deposited by pulse current |
| title_short | The study of Zn–Co alloy coatings electrochemically deposited by pulse current |
| title_sort | study of zn co alloy coatings electrochemically deposited by pulse current |
| topic | zinc-cobalt alloys coatings electro-deposition pulse current corrosion stability |
| url | http://www.doiserbia.nb.rs/img/doi/0367-598X/2012/0367-598X1200035B.pdf |
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