Sacrificial protection of Mg-based resorbable implant alloy by magnetron sputtered Mg5Gd alloy coating: A short-term study
authors Yasakau, KA; Bastos, AC; Haffner, D; Quandt, E; Feyerabend, F; Ferreira, MGS; Zheludkevich, ML
nationality International
journal CORROSION SCIENCE
author keywords Magnesium alloy; Biodegradable material; Magnetron sputtering; SVET; AFM; SKPFM
keywords SCANNING KELVIN PROBE; BIODEGRADABLE MAGNESIUM IMPLANTS; HIGH-PURITY MG; RARE-EARTH; CORROSION BEHAVIOR; IN-VIVO; PURE MAGNESIUM; MECHANICAL-PROPERTIES; LOCALIZED CORROSION; HYDROGEN EVOLUTION
abstract In this work metallic pins made of Mg5Gd alloy were coated with magnetron sputtered PVD Mg5Gd layers. Immersion tests in Hank's balanced salt solution (HBSS) were performed. The PVD coating drastically reduced the corrosion rate of the Mg5Gd pin. The corrosion mechanism of the coating was studied in model electrochemical measurements by Scanning Vibrating Electrode Technique and galvanic current measurements. The tests revealed the preferential anodic dissolution of the Mg5Gd coating galvanically coupled with the bulk Mg5Gd pin. Local measurements of Volta potential difference revealed the VPD contrast between the pin and the coating surfaces only after immersion in HBSS.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0010-938X
isbn 1879-0496
year published 2021
volume 189
digital object identifier (doi) 10.1016/j.corsci.2021.109590
web of science category 15
subject category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000677547100004
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journal analysis (jcr 2019):
journal impact factor 6.479
5 year journal impact factor 6.894
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