The Study on the Anti-corrosion Performance of NiTi Alloy in Human Body Solution with the Fabricating Processes of Laser Irradiation and PDMS Modification

• 作者: Chengjuan Yang Weiran Cao Zhen Yang Meng Wang Xiubing Jing Yanling Tian
• 来源期刊: 仿生工程学报（英文版）
• 年，卷（期）: 2021,（1）
• 页码范围: 77-91
• 页数: 15页
• 语种: 英文
• DOI: 10.1007/s42235-021-0011-5

摘要

This paper presents a new and safe method of fabricating super-hydrophobic surface on NiTi Shape Memory Alloy (SMA) ,which aims to further improve the corrosion resistance performance and biocompatibility of NiTi SMA.The super-hydrophobic surfaces with Water Contact Angle (WCA) of 155.4° ± 0.9° and Water Sliding Angle (WSA) of 4.4°±1.1° were obtained by the hybrid of laser irradiation and polydimethylsiloxane (PDMS) modification.The forming mechanism was systematically revealed via Scanning Electron Microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS) .The anti-corrosion of samples was investigated in Simulated Body Fluid (SBF) via the potentiodynamic polarization (PDP) and Electrochemical Impedance Spectroscopy (EIS) tests.PDMS super-hydrophobic coatings showed superior anti-corrosion performance.The Ni ions release experiment was also conducted and the corresponding result demonstrated that the super-hydrophobic samples effectively inhibited the release of Ni ions both in electrolyte and SBF.Besides,biocompatibility was further analyzed,indicating that the prepared super-hydrophobic surfaces present a huge potential advantage in biocompatibility.