Formation mechanism, degradation behavior, and cytocompatibility of a double-layered structural MAO/rGO-CaP coating on AZ31 Mg

Yunfeng Wu; Yaming Wang; Sanwei Tian; Hongyu Li; Ying Zhao; Dechang Jia; Yu Zhou

doi:10.1016/j.colsurfb.2020.110901

Formation mechanism, degradation behavior, and cytocompatibility of a double-layered structural MAO/rGO-CaP coating on AZ31 Mg

Yunfeng Wu
, Yaming Wang^*
, Sanwei Tian
, Hongyu Li
, Ying Zhao
, Dechang Jia
, Yu Zhou

^*Corresponding author for this work

Harbin Institute of Technology
Shenzhen Institute of Advanced Technology

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

Microarc oxidation coated magnesium attracts increasing attention recently, owing to its excellent anti-corrosion and wear-resistance properties. However, some drawbacks like micropores on the MAO surface reduce the corrosion resistance of the coatings, which requires post treatment. In the present work, a specific double layered structural MAO/rGO-CaP coating was produced to seal the micropores on the MAO coating and further enhance the corrosion resistance. The structure, cytocompatibility, electrochemical properties, and long-term corrosion behavior of the composite coatings were investigated. XRD results show that the coatings are mainly composed of CaHPO₄ (DCP) and Ca₅(PO₄)₃OH (HA). Cytocompatibility evaluation indicates that the rGO in the coating shows no cytotoxicity. Corrosion potential of the bottom MAO coating is enhanced significantly by the rGO-CaP top coatings from -1.58 V to -1.02 V. Long term soaking test reveals that a longer chemical stable coating was produced. The results suggest a potential application of the MAO/rGO-CaP coating in practice.

Original language	English
Article number	110901
Journal	Colloids and Surfaces B: Biointerfaces
Volume	190
DOIs	https://doi.org/10.1016/j.colsurfb.2020.110901
State	Published - Jun 2020

Keywords

Ca-P coatings
Graphene oxide
Hydrothermal
Microarc oxidation

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10.1016/j.colsurfb.2020.110901

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@article{dec29e8046ec403a9fc6d937f8ffa3e7,

title = "Formation mechanism, degradation behavior, and cytocompatibility of a double-layered structural MAO/rGO-CaP coating on AZ31 Mg",

abstract = "Microarc oxidation coated magnesium attracts increasing attention recently, owing to its excellent anti-corrosion and wear-resistance properties. However, some drawbacks like micropores on the MAO surface reduce the corrosion resistance of the coatings, which requires post treatment. In the present work, a specific double layered structural MAO/rGO-CaP coating was produced to seal the micropores on the MAO coating and further enhance the corrosion resistance. The structure, cytocompatibility, electrochemical properties, and long-term corrosion behavior of the composite coatings were investigated. XRD results show that the coatings are mainly composed of CaHPO4 (DCP) and Ca5(PO4)3OH (HA). Cytocompatibility evaluation indicates that the rGO in the coating shows no cytotoxicity. Corrosion potential of the bottom MAO coating is enhanced significantly by the rGO-CaP top coatings from -1.58 V to -1.02 V. Long term soaking test reveals that a longer chemical stable coating was produced. The results suggest a potential application of the MAO/rGO-CaP coating in practice.",

keywords = "Ca-P coatings, Graphene oxide, Hydrothermal, Microarc oxidation",

author = "Yunfeng Wu and Yaming Wang and Sanwei Tian and Hongyu Li and Ying Zhao and Dechang Jia and Yu Zhou",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = jun,

doi = "10.1016/j.colsurfb.2020.110901",

language = "英语",

volume = "190",

journal = "Colloids and Surfaces B: Biointerfaces",

issn = "0927-7765",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Formation mechanism, degradation behavior, and cytocompatibility of a double-layered structural MAO/rGO-CaP coating on AZ31 Mg

AU - Wu, Yunfeng

AU - Wang, Yaming

AU - Tian, Sanwei

AU - Li, Hongyu

AU - Zhao, Ying

AU - Jia, Dechang

AU - Zhou, Yu

PY - 2020/6

Y1 - 2020/6

N2 - Microarc oxidation coated magnesium attracts increasing attention recently, owing to its excellent anti-corrosion and wear-resistance properties. However, some drawbacks like micropores on the MAO surface reduce the corrosion resistance of the coatings, which requires post treatment. In the present work, a specific double layered structural MAO/rGO-CaP coating was produced to seal the micropores on the MAO coating and further enhance the corrosion resistance. The structure, cytocompatibility, electrochemical properties, and long-term corrosion behavior of the composite coatings were investigated. XRD results show that the coatings are mainly composed of CaHPO4 (DCP) and Ca5(PO4)3OH (HA). Cytocompatibility evaluation indicates that the rGO in the coating shows no cytotoxicity. Corrosion potential of the bottom MAO coating is enhanced significantly by the rGO-CaP top coatings from -1.58 V to -1.02 V. Long term soaking test reveals that a longer chemical stable coating was produced. The results suggest a potential application of the MAO/rGO-CaP coating in practice.

AB - Microarc oxidation coated magnesium attracts increasing attention recently, owing to its excellent anti-corrosion and wear-resistance properties. However, some drawbacks like micropores on the MAO surface reduce the corrosion resistance of the coatings, which requires post treatment. In the present work, a specific double layered structural MAO/rGO-CaP coating was produced to seal the micropores on the MAO coating and further enhance the corrosion resistance. The structure, cytocompatibility, electrochemical properties, and long-term corrosion behavior of the composite coatings were investigated. XRD results show that the coatings are mainly composed of CaHPO4 (DCP) and Ca5(PO4)3OH (HA). Cytocompatibility evaluation indicates that the rGO in the coating shows no cytotoxicity. Corrosion potential of the bottom MAO coating is enhanced significantly by the rGO-CaP top coatings from -1.58 V to -1.02 V. Long term soaking test reveals that a longer chemical stable coating was produced. The results suggest a potential application of the MAO/rGO-CaP coating in practice.

KW - Ca-P coatings

KW - Graphene oxide

KW - Hydrothermal

KW - Microarc oxidation

UR - https://www.scopus.com/pages/publications/85081167287

U2 - 10.1016/j.colsurfb.2020.110901

DO - 10.1016/j.colsurfb.2020.110901

M3 - 文章

C2 - 32179414

AN - SCOPUS:85081167287

SN - 0927-7765

VL - 190

JO - Colloids and Surfaces B: Biointerfaces

JF - Colloids and Surfaces B: Biointerfaces

M1 - 110901

ER -

Formation mechanism, degradation behavior, and cytocompatibility of a double-layered structural MAO/rGO-CaP coating on AZ31 Mg

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Keywords

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