Surface characterization and corrosion behavior of silanized magnesium coated with graphene for biomedical application

被引：40

作者：

Neupane, M. P. ^{[1
,2
,3
]}

Lee, S. J. ^{[4
]}

Kang, J. Y. ^{[5
]}

Park, I. S. ^{[6
,7
]}

Bae, T. S. ^{[1
,2
,3
]}

Lee, M. H. ^{[1
,2
,3
]}

机构：

[1] Chonbuk Natl Univ, Dept Dent Biomat, Jeonju, South Korea

[2] Chonbuk Natl Univ, Inst Biodegradable Mat, Inst Oral Biosci, Jeonju, South Korea

[3] Chonbuk Natl Univ, Sch Dent, Plus Project BK21, Jeonju, South Korea

[4] Chungnam Natl Univ, Dept New Drug Discovery & Dev, Yuseong 305764, Daejeon, South Korea

[5] Hallym Univ, Dongtan Sacred Heart Hosp, Dept Oral & Maxillofacial Surg, Hwaseong 445170, Gyeonggi Do, South Korea

[6] Chonbuk Natl Univ, Div Adv Mat Engn, Jeonju 561756, South Korea

[7] Chonbuk Natl Univ, Inst Biodegradable Mat, Jeonju 561756, South Korea

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 163卷

基金：

新加坡国家研究基金会;

关键词：

Biomaterials; Coatings; Corrosion; Electrochemical properties; Multilayers; AL-ALLOY; OXIDE; RESISTANCE; FILMS; FABRICATION; PROTECTION; REDUCTION; COATINGS;

D O I：

10.1016/j.matchemphys.2015.07.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We here report the use of thin layers of graphene oxide (GO) as a protective coating that inhibits corrosion of underlying magnesium (Mg) metal. In order to coat the GO layer, Mg surfaces were hydroxylated with NaOH solution followed by silanization with dipping in 3-aminopropyltriethoxysilane (APTES) solution and subsequent coating with GO. Here, electrochemical methods were employed to study the corrosion behavior of Mg by coating graphene on it using multi-step coatings. Potentiodynamic polarization measurement determined that the graphene coating effectively inhibited the metal from corrosion. Electrochemical impedance spectroscopy (EIS) measurements suggested that graphene film on metal surface protect the metal from oxidation. This was as a result of impermeability of GO coatings to ions diffuse of oxidizing gas and corrosive liquid solution. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：229 / 235

页数：7

共 30 条

[1] Thin Film Fabrication and Simultaneous Anodic Reduction of Deposited Graphene Oxide Platelets by Electrophoretic Deposition [J].