Effects of Different CO2 Concentrations and Degradation Media on Static Corrosion of Commercially Pure Zinc
Por:
Ould Mohamed S., Gambaro, Sofia, Ramirez-Ledesma, Ana Laura, Paternoster, Carlo, Mantovani, Diego
Publicada:
1 ene 2023
Resumen:
Zn alloys have lately captivated the attention of the scientific community as possible materials for cardiovascular applications, showing a corrosion behavior and mechanical properties in between of those of Mg and Fe alloys. To better understand the different aspects of the interaction of Zn with body fluids, the basic corrosion pattern and the degradation products’ formation were investigated considering the effect of CO2 amount in the atmosphere and different pseudo-physiological media; that is Hanks’ balanced salt (HSS), Dulbecco’s phosphate-buffered saline (PSS) and physiological saline solution (NSS), through a 14-day static immersion study. A mixed degradation layer mainly composed of ZnO with Zn3(PO4)2·4H2O and Zn(CO3)2 precipitates was found on surfaces immersed in both HSS and PSS, independently of the atmosphere, while a ZnO/ZnCl2 layer was found on the surface immersed in NSS, which also revealed the higher corrosion rate due to the effect of Cl- ions. Samples tested under a CO2-rich atmosphere showed a more compact passivating layer, higher dimensions crystals and less cavities when tested in HSS, PSS and NSS, respectively. © 2023 by the authors.
Filiaciones:
Ould Mohamed S.:
Lab Biomaterials and Bioengineering, CRC Tier I. Department of Mining, Metallurgy and Materials Engineering & CHU de Québec Research Center, Division of Regenerative Medicine, Laval University, Quebec City, QC G1V 0A6, Canada
Gambaro, Sofia:
National Research Council, Institute of Condensed Matter Chemistry and Technologies for Energy, CNR-ICMATE, Genoa, 16149, Italy
Ramirez-Ledesma, Ana Laura:
Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
Paternoster, Carlo:
Lab Biomaterials and Bioengineering, CRC Tier I. Department of Mining, Metallurgy and Materials Engineering & CHU de Québec Research Center, Division of Regenerative Medicine, Laval University, Quebec City, QC G1V 0A6, Canada
Mantovani, Diego:
Lab Biomaterials and Bioengineering, CRC Tier I. Department of Mining, Metallurgy and Materials Engineering & CHU de Québec Research Center, Division of Regenerative Medicine, Laval University, Quebec City, QC G1V 0A6, Canada
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