In Vitro Corrosion Behavior of Zn3Mg0.7Y Biodegradable Alloy in Simulated Body Fluid (SBF)

• Published in: Applied sciences Vol. 12; no. 5; p. 2727
• Main Authors: Panaghie, Cătălin, Cimpoeșu, Ramona, Zegan, Georgeta, Roman, Ana-Maria, Ivanescu, Mircea Catalin, Aelenei, Andra Adorata, Benchea, Marcelin, Cimpoeșu, Nicanor, Ioanid, Nicoleta
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.03.2022
• Subjects: Alloys; Biocompatibility; Biodegradability; biodegradable; Biodegradable materials; Biodegradation; Biomedical materials; Body fluids; Chemical composition; Corrosion; Corrosion potential; Electrochemical corrosion; Electrochemical impedance spectroscopy; Electrochemistry; Electrode polarization; Electrodes; Electrolytes; Electron microscopy; In vitro methods and tests; Linear polarization; Magnesium; Mechanical properties; Medical materials; Metals; Microhardness; microscratch; Orthopedics; Polarization; Powder metallurgy; RNA polymerase; Scratch resistance; Spectroscopy; Spectrum analysis; Transplants & implants; Uniform attack (corrosion); Yttrium; Zinc; Zinc base alloys; China
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app12052727

Biodegradable metallic materials represent a new class of biocompatible materials for medical applications based on numerous advantages. Among them, those based on zinc have a rate of degradation close to the healing period required by many clinical problems, which makes them more suitable than those based on magnesium or iron. The poor mechanical properties of Zn could be significantly improved by the addition of Mg and Y. In this research, we analyze the electro-chemical and mechanical behavior of a new alloy based on Zn3Mg0.7Y compared with pure Zn and Zn3Mg materials. Microstructure and chemical composition were investigated by electron microscopy and energy dispersive spectroscopy. The electrochemical corrosion was analyzed by linear polarization (LP), cyclic polarization (CP) and electrochemical impedance spectroscopy (EIS). For hardness and scratch resistance, a microhardness tester and a scratch module were used. Findings revealed that the mechanical properties of Zn improved through the addition of Mg and Y. Zn, Zn-Mg and Zn-Mg-Y alloys in this study showed highly active behavior in SBF with uniform corrosion. Zinc metals and their alloys with magnesium and yttrium showed a moderate degradation rate and can be considered as promising biodegradable materials for orthopedic application.