Sandwiched polydopamine (PDA) layer for titanium dioxide (TiO2) coating on magnesium to enhance corrosion protection

被引：102

作者：

Chen, Yingqi ^{[1
]}

Zhao, Sheng ^{[1
]}

Chen, Meiyun ^{[1
]}

Zhang, Wentai ^{[1
]}

Mao, Jinlong ^{[1
]}

Zhao, Yuancong ^{[1
]}

Maitz, Manfred F. ^{[2
]}

Huang, Nan ^{[1
]}

Wan, Guojiang ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Coll Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China

[2] Max Bergmann Ctr Biomat, Leibniz Inst Polymer Res Dresden, D-01069 Dresden, Germany

来源：

CORROSION SCIENCE | 2015年 / 96卷

基金：

中国国家自然科学基金;

关键词：

Magnesium; Organic coatings; EIS; Polarization; Interfaces; PHYTIC ACID; ALLOYS; SURFACE; RESISTANCE; IMPLANTS; MG; HEMOCOMPATIBILITY; BIODEGRADATION; PRETREATMENT; DEPOSITION;

D O I：

10.1016/j.corsci.2015.03.020

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

A polydopamine (PDA) layer was sandwiched between a TiO2 coating and Mg substrate to enhance the corrosion protection. The PDA layer was covalently immobilized on Mg, and the TiO2 was coated by liquid phase deposition subsequently on it. The hybrid TiO2/PDA coated Mg exhibited significantly smaller free corrosion current density as well as a remarkably lower degradation rate in vitro (up to 21 days) in phosphate buffered saline compared to direct TiO2 coated and untreated Mg. The efficacy is ascribed to the organic PDA layer which suppresses the electric pathway of galvanic corrosion cell and therefore corrosion rate of magnesium. (C) 2015 Elsevier Ltd. All rights reserved.

引用

收藏

页码：67 / 73

页数：7

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