标题：In vitro corrosion resistance of layer-by-layer assembled polyacrylic acid multilayers induced Ca–P coating on magnesium alloy AZ31
作者：Cui L.-Y.; Cheng S.-C.; Liang L.-X.; Zhang J.-C.; Li S.-Q.; Wang Z.-L.; Zeng R.-C.
作者机构：[Cui, L.-Y] College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China;[ Cheng, S.-C] College 更多
通讯作者地址：[Zeng, R.-C] College of Materials Science and Engineering, Shandong University of Science and TechnologyChina;
关键词：Biomineralization; Calcium phosphate; Coating; Corrosion; Layer-by-layer assembly; Magnesium alloy
摘要：Biodegradable magnesium (Mg)-based alloys have aroused great concern owing to their promising characteristics as temporary implants for orthopedic application. But their undesirably rapid corrosion rate under physiological conditions has limited the actual clinical application. This study reports the use of a novel biomimetic polyelectrolyte multilayer template, based on polyvinylpyrrolidone (PVP) and polyacrylic acid (PAA) via layer-by-layer (LbL) assembly, to improve the corrosion resistance of the alloy. Surface characterization techniques (field-emission scanning electron microscopy, Fourier transform infrared (FTIR) spectrophotometer and X-ray diffractometer) confirmed the formation of biomineralized Ca–P coating on AZ31 alloy. Both hydrogen evolution and electrochemical corrosion tests demonstrated that the corrosion protection of the polyelectrolyte-induced Ca–P coating on AZ31 alloy. The formation mechanism of biomineralized Ca–P coating was proposed. © 2020