Well-oriented magnesium hydroxide nanoplatelets coating with high corrosion resistance and osteogenesis on magnesium alloy  

作　　者：Ya Shu Feng Peng Zhi-Hui Xie Qiwen Yong Liang Wu Juning Xie Mei Li 

机构地区：[1]Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province,College of Chemistry and Chemical Engineering,China West Normal University,Nanchong,637002,China [2]Medical Research Institute,Department of Orthopedics,Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences),Southern Medical University,Guangzhou 510080,China [3]College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China

出　　处：《Journal of Magnesium and Alloys》2024年第8期3292-3307,共16页镁合金学报（英文）

基　　金：supported by the National Natural Science Foundation of China(NSFC,52271073);the Sichuan Science and Technology Program(2024NSFJQ0034);the Central Government Guided Special Program(No.2021ZYD0049);the Young Elite Scientists Sponsorship Program by CAST(YESS,2018QNRC001);the GDPH Supporting Fund for Talent Program(KY0120220137);the Scientific and Technological Projects of Guangzhou,China(202002030283).

摘　　要：Magnesium alloys are nontoxic and promising as orthopedic metallic implants,but preparing a biocompatible Mg(OH)_(2)layer with high corrosion protection ability remains challenging.It is generally believed that the Mg(OH)_(2)layer,especially that formed in a natural condition,cannot provide desirable corrosion resistance in the community of corrosion and protection.Here,several Mg(OH)_(2)coatings were prepared by changing the pH values of sodium hydroxide solutions.These coatings were composed of innumerable nanoplatelets with different orientations and showed distinguished capability in corrosion resistance.The nanoplatelets were well-oriented with their ab-planes parallel to,instead of perpendicular to,the magnesium alloy surface by raising the pH value to 14.0.This specific orientation resulted in the optimal coating showing long-term corrosion protection in both in vitro and in vivo environments and good osteogenic capability.These finds manifest that the environment-friendly Mg(OH)_(2)coating can also provide comparable and better corrosion protection than many traditional chemical conversion films(such as phosphate,and fluoride).

关 键 词：Magnesium alloy Corrosion COATING Magnesium hydroxide BIOMATERIALS 

分 类 号：TG174.4[金属学及工艺—金属表面处理]