Corrosion Behavior of Zn, Fe and Fe-Zn Powder Materials Prepared via Uniaxial Compression
| Autor: | Ivana Šišoláková, Róbert Džunda, Andrej Oriňák, Pavol Cipa, Radka Gorejová, Tibor Sopcak, Renáta Oriňáková |
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| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Scanning electron microscope Galvanic anode chemistry.chemical_element Zinc Electrochemistry biodegradation Article Corrosion Metal iron metallic powders Powder metallurgy General Materials Science Polarization (electrochemistry) Microscopy QC120-168.85 corrosion QH201-278.5 zinc Engineering (General). Civil engineering (General) TK1-9971 Descriptive and experimental mechanics chemistry visual_art visual_art.visual_art_medium Electrical engineering. Electronics. Nuclear engineering TA1-2040 Nuclear chemistry |
| Zdroj: | Materials Volume 14 Issue 17 Materials, Vol 14, Iss 4983, p 4983 (2021) |
| ISSN: | 1996-1944 |
| Popis: | Powder metallurgy is one of the most prevalent ways for metallic degradable materials preparation. Knowledge of the properties of initial powders used during this procedure is therefore of great importance. Two different metals, iron and zinc, were selected and studied in this paper due to their promising properties in the field of biodegradable implants. Raw powders were studied using scanning electron microscopy (SEM) coupled with energy dispersive spectrometry (EDX). Powders (Fe, Zn and Fe-Zn in a weight ratio of 1:1) were then compressed at the pressure of 545 MPa to the form of pellets with a diameter of 1.7 cm. Surface morphology and degradation behavior in the Hanks´ solution were studied and evaluated. Electrochemical polarization tests along with the static immersion tests carried out for 21 days were employed for corrosion behavior characterization. The highest corrosion rate was observed for pure Zn powder followed by the Fe-Zn and Fe, respectively. A mixed Fe-Zn sample showed similar properties as pure zinc with no signs of iron degradation after 21 days due to the effect of galvanic protection secured by the zinc acting as a sacrificial anode. |
| Databáze: | OpenAIRE |
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