Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating
Zn–Ni plating is indispensable in various industries because of its high corrosion resistance. However, Ni has been reported to trigger allergies; thus, an alternative Ni-free plating is desired. Zn–Fe plating is considered to be a promising candidate, albeit its corrosion resistance still needs to...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2017-12-01
|
Series: | Coatings |
Subjects: | |
Online Access: | https://www.mdpi.com/2079-6412/7/12/235 |
id |
doaj-c1d3d383e4eb44e4a05c0fefce51bada |
---|---|
record_format |
Article |
spelling |
doaj-c1d3d383e4eb44e4a05c0fefce51bada2020-11-24T23:43:18ZengMDPI AGCoatings2079-64122017-12-0171223510.3390/coatings7120235coatings7120235Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron PlatingDaichi Kosugi0Takeshi Hagio1Yuki Kamimoto2Ryoichi Ichino3Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanGreen Mobility Research Institute, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanZn–Ni plating is indispensable in various industries because of its high corrosion resistance. However, Ni has been reported to trigger allergies; thus, an alternative Ni-free plating is desired. Zn–Fe plating is considered to be a promising candidate, albeit its corrosion resistance still needs to be improved. The corrosion resistance of Zn–Fe plating is expected to increase by the addition of Mo as the third alloying element as it is more noble than Zn and Fe. In this study, Zn–Fe–Mo plating with a corrosion resistance nearly equivalent to that of the Zn–Ni plating was fabricated. Zn–Fe–Mo plating was electrically deposited from continuously-agitated plating baths prepared by mixing ZnSO4, FeSO4, Na2MoO4, Na3C6H5O7, and Na2SO4 using Fe or Ni plates as the substrate. The surface morphology, composition, crystal phase, and electronic state of Mo of the platings were investigated by scanning electron microscopy equipped with energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The anti-corrosion performance was evaluated by Tafel extrapolation method. Formation of plating comprising a Mo containing alloy phase was found to be crucial for improving corrosion resistance. The Zn–Fe–Mo plating demonstrates promise for replacing anti-corrosion Zn–Ni platings.https://www.mdpi.com/2079-6412/7/12/235Zn–Ni platingZn–Fe platinganti-corrosion performanceMo additionalloy formation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daichi Kosugi Takeshi Hagio Yuki Kamimoto Ryoichi Ichino |
spellingShingle |
Daichi Kosugi Takeshi Hagio Yuki Kamimoto Ryoichi Ichino Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating Coatings Zn–Ni plating Zn–Fe plating anti-corrosion performance Mo addition alloy formation |
author_facet |
Daichi Kosugi Takeshi Hagio Yuki Kamimoto Ryoichi Ichino |
author_sort |
Daichi Kosugi |
title |
Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating |
title_short |
Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating |
title_full |
Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating |
title_fullStr |
Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating |
title_full_unstemmed |
Effect of the Addition of Molybdenum on the Structure and Corrosion Resistance of Zinc–Iron Plating |
title_sort |
effect of the addition of molybdenum on the structure and corrosion resistance of zinc–iron plating |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2017-12-01 |
description |
Zn–Ni plating is indispensable in various industries because of its high corrosion resistance. However, Ni has been reported to trigger allergies; thus, an alternative Ni-free plating is desired. Zn–Fe plating is considered to be a promising candidate, albeit its corrosion resistance still needs to be improved. The corrosion resistance of Zn–Fe plating is expected to increase by the addition of Mo as the third alloying element as it is more noble than Zn and Fe. In this study, Zn–Fe–Mo plating with a corrosion resistance nearly equivalent to that of the Zn–Ni plating was fabricated. Zn–Fe–Mo plating was electrically deposited from continuously-agitated plating baths prepared by mixing ZnSO4, FeSO4, Na2MoO4, Na3C6H5O7, and Na2SO4 using Fe or Ni plates as the substrate. The surface morphology, composition, crystal phase, and electronic state of Mo of the platings were investigated by scanning electron microscopy equipped with energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The anti-corrosion performance was evaluated by Tafel extrapolation method. Formation of plating comprising a Mo containing alloy phase was found to be crucial for improving corrosion resistance. The Zn–Fe–Mo plating demonstrates promise for replacing anti-corrosion Zn–Ni platings. |
topic |
Zn–Ni plating Zn–Fe plating anti-corrosion performance Mo addition alloy formation |
url |
https://www.mdpi.com/2079-6412/7/12/235 |
work_keys_str_mv |
AT daichikosugi effectoftheadditionofmolybdenumonthestructureandcorrosionresistanceofzincironplating AT takeshihagio effectoftheadditionofmolybdenumonthestructureandcorrosionresistanceofzincironplating AT yukikamimoto effectoftheadditionofmolybdenumonthestructureandcorrosionresistanceofzincironplating AT ryoichiichino effectoftheadditionofmolybdenumonthestructureandcorrosionresistanceofzincironplating |
_version_ |
1725502070241361920 |