Covalent immobilization of phytic acid on Mg by alkaline pre-treatment: Corrosion and degradation behavior in phosphate buffered saline

被引：80

作者：

Chen, Yingqi ^{[1
]}

Wan, Guojiang ^{[1
]}

Wang, Juan ^{[1
]}

Zhao, Sheng ^{[1
]}

Zhao, Yuancong ^{[1
]}

Huang, Nan ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Coll Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 61003, Peoples R China

来源：

CORROSION SCIENCE | 2013年 / 75卷

基金：

中国国家自然科学基金;

关键词：

Magnesium; Organic coatings; EIS; Polarization; Interfaces; AZ91D MAGNESIUM ALLOY; CONVERSION COATINGS; STENT; ELECTRODEPOSITION; PROTECTION; RESISTANCE; THROMBOSIS; WE43; ION;

D O I：

10.1016/j.corsci.2013.06.011

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Magnesium-based materials are promising in biodegradable implants, but the proper corrosion control is a challenge. Phytic acid has potential as a coating on Mg to control the degradation rate. An alkaline pretreatment process is implemented to form the hydroxyl group on the Mg surface and covalently immobilize phytic acid. The surface-immobilized phytic acid molecules chelate with Mg to form a dense and homogenous protective coating. The coated Mg exhibits a smaller corrosion current density and degradation rate as compared to bare Mg in the phosphate buffered saline. (c) 2013 Elsevier Ltd. All rights reserved.

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页码：280 / 286

页数：7

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