title: Relatively uniform and accelerated degradation of pure iron coated with micro-patterned Au disc arrays.
abstract: Pure iron has been proven to be a potential biodegradable metal, but its degradation rate was too slow. To accelerate its biodegradation, micro-patterned Au disc films were deposited on the surface of pure iron by vacuum sputtering. The influence of Au disc films on the degradation of pure iron matrix in vitro was investigated in the present study. Electrochemical measurement results indicated that the corrosion current density of pure iron coated with micro-patterned Au disc films in Hank's solution was 4 times larger than that of the uncoated one, while the difference between the influences of micro-patterned Au discs with different diameters on the corrosion rate of pure iron was insignificant. Immersion test indicated that the corrosion depth for pure iron coated with Au disc films was about three times as that of bare pure iron. Both electrochemical test and immersion test revealed that the corrosion of pure iron matrix coated with Au disc array became more uniform.
authors.affiliation: Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China.
authors.forename: J
authors.initials: J
authors.lastname: Cheng
authors.affiliation: State Key Laboratory for Turbulence and Complex System, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: T
authors.initials: T
authors.lastname: Huang
authors.affiliation: Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China; State Key Laboratory for Turbulence and Complex System, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China. Electronic address: yfzheng@pku.edu.cn.
authors.forename: Y F
authors.initials: YF
authors.lastname: Zheng
mesh_terms: D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003343:Corrosion; D006046:Gold / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008567:Membranes, Artificial
chemical_list: D020099:Coated Materials, Biocompatible; D008567:Membranes, Artificial; D006046:Gold; D007501:Iron
keywords: Biodegradation; Micro-patterned Au coating; Pure iron