title: In vitro degradation and electrochemical corrosion evaluations of microarc oxidized pure Mg, Mg-Ca and Mg-Ca-Zn alloys for biomedical applications.
abstract: Calcium phosphate (CaP) ceramic coatings were fabricated on pure magnesium (Mg) and self-designed Mg-0.6Ca, Mg-0.55Ca-1.74Zn alloys by microarc oxidation (MAO). The coating formation, growth and biomineralization mechanisms were discussed. The coating degradability and bioactivity were evaluated by immersion tests in trishydroxymethyl-aminomethane hydrochloric acid (Tris-HCl) buffer and simulated body fluid (SBF) solutions, respectively. The coatings and corrosion products were characterized by scanning electron microscope (SEM), X-ray diffractometer (XRD), X-ray photoelectron spectrometer (XPS) and fourier transform infrared spectrometer (FT-IR). The electrochemical workstation was used to investigate the electrochemical corrosion behaviors of substrates and coatings. Results showed that Mg-0.55Ca-1.74Zn alloy exhibits the highest mechanical strength and electrochemical corrosion resistance among the three alloys. The MAO-coated Mg-0.55Ca-1.74Zn alloy has the potential to be served as a biodegradable implant.
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China.
authors.forename: Yaokun
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China.
authors.forename: Siyu
authors.initials: S
authors.lastname: He
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China. Electronic address: wangdg@sdu.edu.cn.
authors.forename: Diangang
authors.initials: D
authors.lastname: Wang
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China.
authors.forename: Danlan
authors.initials: D
authors.lastname: Huang
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Zheng
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China.
authors.forename: Siqi
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China.
authors.forename: Pan
authors.initials: P
authors.lastname: Dong
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji'nan 250061, Shandong, PR China. Electronic address: czchen@sdu.edu.cn.
authors.forename: Chuanzhong
authors.initials: C
authors.lastname: Chen
mesh_terms: D000497:Alloys; D001672:Biocompatible Materials; D003343:Corrosion; D066298:In Vitro Techniques; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D001672:Biocompatible Materials
keywords: Coating; Electrochemical corrosion; Interfaces; Magnesium alloy; Oxidation