title: Dissolution and precipitation behaviors of silicon-containing ceramic coating on Mg-Zn-Ca alloy in simulated body fluid.
abstract: We prepared Si-containing and Si-free coatings on Mg-1.74Zn-0.55Ca alloy by micro-arc oxidation. The dissolution and precipitation behaviors of Si-containing coating in simulated body fluid (SBF) were discussed. Corrosion products were characterized by scanning electron microscope (SEM), X-ray diffractometer (XRD), fourier transform infrared spectrometer (FT-IR) and X-ray photoelectron spectrometer (XPS). Electrochemical workstation, inductively coupled plasma atomic emission spectrometer (ICP-AES), flame atomic absorption spectrophotometer (AAS) and pH meter were employed to detect variations of electrochemical parameter and ions concentration respectively. Results indicate that the fast formation of calcium phosphates is closely related to the SiOx(n-) groups, which induce the heterogeneous nucleation of amorphous hydroxyapatite (HA) by sorption of calcium and phosphate ions.
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. Electronic address: czchen@sdu.edu.cn.
authors.forename: Chuanzhong
authors.initials: C
authors.lastname: Chen
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: 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
mesh_terms: D000497:Alloys; D001826:Body Fluids; D002118:Calcium; D002516:Ceramics; D008274:Magnesium; D008954:Models, Biological; D012825:Silicon / Q000737:chemistry*; D012995:Solubility; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction; D015032:Zinc
chemical_list: D000497:Alloys; D008274:Magnesium; D015032:Zinc; D002118:Calcium; D012825:Silicon
keywords: Calcium phosphates; Corrosion; Magnesium alloy; Microstructure; Silicon coating