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Surface Engineering Volume 37, 2021 - Issue 8
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Research Article

Synthesis and degradation behaviour of Zn-modified coating on Mg alloy

Jun Wanga School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China;b Henan Key Laboratory of Advanced Magnesium Alloys, Zhengzhou, People’s Republic of China;c Key Laboratory of Advanced Materials Processing & Mold, Ministry of Education, Zhengzhou, People’s Republic of ChinaView further author information
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Chaoyang Jina School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of ChinaView further author information
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Di Meia School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China;d Magnesium Innovation Centre – MagIC, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, GermanyORCID Iconhttps://orcid.org/0000-0002-1327-4217View further author information
ORCID Icon,
Yan Dinga School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of ChinaView further author information
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Lei Changa School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China;b Henan Key Laboratory of Advanced Magnesium Alloys, Zhengzhou, People’s Republic of China;c Key Laboratory of Advanced Materials Processing & Mold, Ministry of Education, Zhengzhou, People’s Republic of ChinaView further author information
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Shijie Zhua School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China;b Henan Key Laboratory of Advanced Magnesium Alloys, Zhengzhou, People’s Republic of China;c Key Laboratory of Advanced Materials Processing & Mold, Ministry of Education, Zhengzhou, People’s Republic of ChinaView further author information
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Liguo Wanga School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China;b Henan Key Laboratory of Advanced Magnesium Alloys, Zhengzhou, People’s Republic of China;c Key Laboratory of Advanced Materials Processing & Mold, Ministry of Education, Zhengzhou, People’s Republic of ChinaCorrespondence[email protected]
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Yashan Fenga School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of ChinaView further author information
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Shaokang Guana School of Material Science and Engineering, Zhengzhou University, Zhengzhou, People’s Republic of China;b Henan Key Laboratory of Advanced Magnesium Alloys, Zhengzhou, People’s Republic of China;c Key Laboratory of Advanced Materials Processing & Mold, Ministry of Education, Zhengzhou, People’s Republic of ChinaCorrespondence[email protected]
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Pages 963-971 | Received 25 Jul 2020, Accepted 16 Oct 2020, Published online: 16 Nov 2020
 
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ABSTRACT

This study aimed to control the degradation of Mg–Zn–Ca alloy and improve its biocompatibility using a biodegradable Zn-modified calcium phosphate coating via dual-pulse electrodeposition. The formation mode and process of the coating were studied herein. Scanning electron microscopy revealed that the coating particles were compactly and neatly packed, and X-ray diffraction analysis, transmission electron microscopy, Fourier transform infrared spectrophotometer and X-ray photoelectron spectroscopy revealed that the coating comprises CaZn2(PO4)2•2H2O. The introduction of Zn changes the formation mechanism of coating. The degradation behaviour of the coated Mg alloy was investigated via immersion test and electrochemical test in simulated body fluid. The results show that this non-stoichiometric Zn-modified calcium phosphate coating is biodegradable and has a better protective effect. In addition, the Zn-containing coating has hydrophilic property which is beneficial to enhance the cellular response to the implant’s surface and increase apatite formation rate.

Acknowledgements

This work was supported by the Key Projects of the Joint Fund of the National Natural Science Foundation of China (U1804251), National Natural Science Foundation of China (51701184, 51671175, 51601169), National Key Research and Development Program of China (2018YFC1106703), and Henan Key Scientific Research Project (16A430029).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Key Projects of the Joint Fund of the National Natural Science Foundation of China [U1804251], National Natural Science Foundation of China [51701184, 51671175, 51601169], National Key Research and Development Program of China [2018YFC1106703], and Henan Key Scientific Research Project [16A430029].

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