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Open AccessArticle

Corrosion Resistance of Mg72Zn24Ca4 and Zn87Mg9Ca4 Alloys for Application in Medicine

1
Faculty of Foundry Engineering, AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków, Poland
2
Institute of Metallurgy and Materials Science of Polish Academy of Sciences in Cracow, 25 Reymonta Street, 30-059 Kraków, Poland
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(16), 3515; https://doi.org/10.3390/ma13163515
Received: 17 July 2020 / Revised: 4 August 2020 / Accepted: 7 August 2020 / Published: 9 August 2020
(This article belongs to the Section Corrosion)
The aim of this work was to monitor the corrosion rate of the Mg72Zn24Ca4 and Zn87Mg9Ca4 alloys. The purity of the alloying elements was 99.9%. The melt process was carried out in an induction furnace. The melting process took place under the cover of an inert gas (argon). The copper form was flooded by liquid alloy. Then, in order to obtain ribbons, the cast alloy, in rod shape, was re-melted on the melt spinning machine. The corrosion resistance of both alloys has been determined on the basis of the following experiments: measurements of the evolution of OCP (open circuit potential), LSV (linear sweep voltamperometry) and EIS (electrochemical impedance spectroscopy). All corrosion tests were carried out in Ringer’s solution at 37 °C and pH 7.2. The corrosion tests have revealed that the zinc alloy, Zn87Mg9Ca4, exhibits significantly higher corrosion resistance in the Ringer solution compared to the magnesium alloy, Mg72Zn24Ca4. Moreover, it has been shown that the cathodic reaction proceeds faster on the surface of ribbons. EIS measurements show that the dissolution of Mg alloy proceeds with two steps: transfer of Mg2+ ions to the Ringer solution and then the formation of the corrosion products, which are deposited on the surface of magnesium alloy. It has been revealed, too, that for both bulk materials, diffusion of chloride ions through the corrosion product’s layer takes place. View Full-Text
Keywords: biodegradability; corrosion; Mg-Zn-Ca alloy; Zn-Mg-Ca alloy; ringer solution biodegradability; corrosion; Mg-Zn-Ca alloy; Zn-Mg-Ca alloy; ringer solution
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MDPI and ACS Style

Fijołek, A.; Lelito, J.; Krawiec, H.; Ryba, J.; Rogal, Ł. Corrosion Resistance of Mg72Zn24Ca4 and Zn87Mg9Ca4 Alloys for Application in Medicine. Materials 2020, 13, 3515. https://doi.org/10.3390/ma13163515

AMA Style

Fijołek A, Lelito J, Krawiec H, Ryba J, Rogal Ł. Corrosion Resistance of Mg72Zn24Ca4 and Zn87Mg9Ca4 Alloys for Application in Medicine. Materials. 2020; 13(16):3515. https://doi.org/10.3390/ma13163515

Chicago/Turabian Style

Fijołek, Andrzej; Lelito, Janusz; Krawiec, Halina; Ryba, Jagoda; Rogal, Łukasz. 2020. "Corrosion Resistance of Mg72Zn24Ca4 and Zn87Mg9Ca4 Alloys for Application in Medicine" Materials 13, no. 16: 3515. https://doi.org/10.3390/ma13163515

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