Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits
This work compares the degradation of Mg and Mg-Ca0.3 alloy when they are exposed for 14 days to Hank’s solution at 37 °C. A combination of immersion test, electrochemical techniques (PDP, EIS, EN), and surface characterization methods (SEM-EDS, XRD, and XPS) were carried out. The pH change over tim...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Online Access: | https://www.mdpi.com/2075-4701/11/9/1357 |
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| author | José Luis González-Murguía Lucien Veleva Geonel Rodríguez-Gattorno Mayra Zyzlila Figueroa-Torres Sebastián Feliu |
| author_facet | José Luis González-Murguía Lucien Veleva Geonel Rodríguez-Gattorno Mayra Zyzlila Figueroa-Torres Sebastián Feliu |
| author_sort | José Luis González-Murguía |
| collection | DOAJ |
| description | This work compares the degradation of Mg and Mg-Ca0.3 alloy when they are exposed for 14 days to Hank’s solution at 37 °C. A combination of immersion test, electrochemical techniques (PDP, EIS, EN), and surface characterization methods (SEM-EDS, XRD, and XPS) were carried out. The pH change over time, the lower mass loss (≈20%), and the lower concentration of the released Mg<sup>2+</sup> ions (≈3.6 times), as well as the lower level of the surface degradation, allowed to consider the positive effect of Ca, presenting Mg-Ca0.3 alloy with lower electrochemical activity than that of Mg. The positive effect of Ca may be due to the formed layer characteristics on the alloy surface, which impedes the cathodic hydrogen evolution and Mg-ions release. The electroless deposited Ag-nano-particles (Ag-NPs) on Mg-Ca0.3 surface were characterized by SEM-EDS, XRD, UV-Vis, and contact angle. The agar-diffusion test was used to compare the growth of <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> bacteria on Mg-Ca0.3 in the presence of Ag-NPs deposits in different size. Zeta-potential of the bacteria was negative, with respect to pH of the Mueller-Hinton culture broth. The greater antibacterial effect of <i>S. aureus</i> was attributed to its more negative zeta-potential, attracting more released Ag<sup>+</sup> ions. |
| first_indexed | 2024-03-10T07:27:34Z |
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| id | doaj.art-f38714eac9694896b21ac3f8f6d79320 |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T07:27:34Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-f38714eac9694896b21ac3f8f6d793202023-11-22T14:12:41ZengMDPI AGMetals2075-47012021-08-01119135710.3390/met11091357Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles DepositsJosé Luis González-Murguía0Lucien Veleva1Geonel Rodríguez-Gattorno2Mayra Zyzlila Figueroa-Torres3Sebastián Feliu4Applied Physics Department, Center for Advanced Study (CINVESTAV), Mérida 97310, MexicoApplied Physics Department, Center for Advanced Study (CINVESTAV), Mérida 97310, MexicoApplied Physics Department, Center for Advanced Study (CINVESTAV), Mérida 97310, MexicoFaculty of Civil Engineering, Autonomous University of Nuevo Leon (UANL), San Nicolás de los Garza 66455, MexicoSurface Engineering, Corrosion and Durability Department, Nacional Center for Metallurgical Research (CENIM-CSIC), 28040 Madrid, SpainThis work compares the degradation of Mg and Mg-Ca0.3 alloy when they are exposed for 14 days to Hank’s solution at 37 °C. A combination of immersion test, electrochemical techniques (PDP, EIS, EN), and surface characterization methods (SEM-EDS, XRD, and XPS) were carried out. The pH change over time, the lower mass loss (≈20%), and the lower concentration of the released Mg<sup>2+</sup> ions (≈3.6 times), as well as the lower level of the surface degradation, allowed to consider the positive effect of Ca, presenting Mg-Ca0.3 alloy with lower electrochemical activity than that of Mg. The positive effect of Ca may be due to the formed layer characteristics on the alloy surface, which impedes the cathodic hydrogen evolution and Mg-ions release. The electroless deposited Ag-nano-particles (Ag-NPs) on Mg-Ca0.3 surface were characterized by SEM-EDS, XRD, UV-Vis, and contact angle. The agar-diffusion test was used to compare the growth of <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> bacteria on Mg-Ca0.3 in the presence of Ag-NPs deposits in different size. Zeta-potential of the bacteria was negative, with respect to pH of the Mueller-Hinton culture broth. The greater antibacterial effect of <i>S. aureus</i> was attributed to its more negative zeta-potential, attracting more released Ag<sup>+</sup> ions.https://www.mdpi.com/2075-4701/11/9/1357magnesiumMg-Ca alloycorrosionHank’s solutionsilver nano-particlesUV-Vis |
| spellingShingle | José Luis González-Murguía Lucien Veleva Geonel Rodríguez-Gattorno Mayra Zyzlila Figueroa-Torres Sebastián Feliu Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits Metals magnesium Mg-Ca alloy corrosion Hank’s solution silver nano-particles UV-Vis |
| title | Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits |
| title_full | Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits |
| title_fullStr | Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits |
| title_full_unstemmed | Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits |
| title_short | Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits |
| title_sort | mg ca0 3 electrochemical activity exposed to hank s physiological solution and properties of ag nano particles deposits |
| topic | magnesium Mg-Ca alloy corrosion Hank’s solution silver nano-particles UV-Vis |
| url | https://www.mdpi.com/2075-4701/11/9/1357 |
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