Corrosion resistance of layer-by-layer assembled polyvinylpyrrolidone/polyacrylic acid and amorphous silica films on AZ31 magnesium alloys

被引：80

作者：

Cui, Lan-Yue ^{[1
,2
]}

Zeng, Rong-Chang ^{[1
,2
]}

Li, Shuo-Qi ^{[1
,2
]}

Zhang, Fen ^{[1
,2
]}

Han, En-Hou ^{[3
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Peoples R China

[2] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China

[3] Chinese Acad Sci, Inst Met Res, Natl Engn Ctr Corros Control, Shenyang 110016, Peoples R China

来源：

RSC ADVANCES | 2016年 / 6卷 / 68期

基金：

中国国家自然科学基金;

关键词：

IN-VITRO CORROSION; COMPOSITE COATINGS; MULTILAYER FILMS; OXIDATION; PHOSPHATE; SURFACE; POLYELECTROLYTES; NANOCOMPOSITE; DEGRADATION; BEHAVIOR;

D O I：

10.1039/c6ra08613f

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

A layer-by-layer (LbL)-assembled composite coating containing SiO2 and a biocompatible polyvinylpyrrolidone (PVP) and polyacrylic acid (PAA) multi-layer, designated as SiO2/(PVP/PAA)(5), was prepared on AZ31 Mg alloy via dip-coating. The surface morphology, microstructure and chemical composition of the coating were investigated using FE-SEM, FT-IR, XRD and XPS. The physical properties of the coating were characterized by scratch testing. The results demonstrated that the coating was amorphous and remarkably soft. PVP and PAA promoted the formation of Ca-P precipitates, and the amorphous silica film further enhanced corrosion resistance. The SiO2/(PVP/PAA)(5) coating may be a promising surface modification for degradable Mg cardiovascular stents.

引用

页码：63107 / 63116

页数：10

共 56 条

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