Preparation, corrosion behavior and biocompatibility of MgFe-layered double hydroxides and calcium hydroxyapatite composite films on 316L stainless steel. (March 2023)

• Record Type: Journal Article
• Authors: Li, Gaojie; Song, Yulai; Chen, Xuegang; Xu, Wenzhou; Tong, Guodong; Zhang, Linyang; Li, Jun; Zhu, Xianyong
• Is Part Of: Materials today communications. Volume 34(2023)
• Publication Date: 2023-03
• Subjects: Layered double hydroxides film -- Hydroxyapatite film -- Layered double oxide -- Coating -- 316 L stainless steel -- Biocompatibility; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.105195
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: MgFe-LDHs films, MgFe-LDO films, HA films, and MgFe-LDO&HA films were prepared on the surface of 316 L stainless steel by hydrothermal method and sol-gel method, respectively. The morphology, composition, and structure of the four different films were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffractometer (XRD), and Fourier transform infrared spectroscopy (FT-IR). Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves were used to analyze and evaluate the corrosion behavior and properties of the four coatings on the surface of 316 L stainless steel. The results show that the four kinds of films are successfully prepared on the surface of 316 L stainless steel, and the corrosion resistance of MgFe-LDO&HA films in SBF is better than that of the HA films. The corrosion protection mechanism is that the composite films have a more uniform and dense structure compared to the HA single-layer films, which improves the physical barrier effect of the corrosive medium. Animal muscle tissue embedding experiments show that the MgFe-LDO&HA films maintain good biocompatibility while maintaining the integrity of the films. Graphical Abstract: ga1