| Autor: |
Ahmed Şeref, Meltem Alp, Erdem Sahin |
| Jazyk: |
English<br />Turkish |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Düzce Üniversitesi Bilim ve Teknoloji Dergisi, Vol 11, Iss 5, Pp 2321-2340 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2148-2446 |
| DOI: |
10.29130/dubited.1371973 |
| Popis: |
Rapid degradation in body fluids is known to be the main shortcoming of the AZ31 magnesium alloy that is aimed to be controlled in this study by chemical conversion of its surface in various phosphate and chloride solutions. Deposited layers on the surface of bare alloy plates were subjected to compositional and morphological analyses to assess their performance as barriers to degradation. Also changes in the mass of the samples and pH of the solutions were monitored during 21 day immersion periods. Formations of prismatic, platelike, needlelike crystals of various compositions including calcium phosphates, magnesium phosphates, magnesium chlorides were observed by scanning electron microscopy and their atomic compositions were determined by EDX and quantitative XRD analyses. The results indicate that a layer of ceramic of various thicknesses can stably form on the base alloy by simple adsorption of the particles suspended in the solution or by nucleation and growth of the products of reactions between dissolved ions and the metal ions released from the surface. These deposition layers that are solely induced by the electrochemical potential of the species in the solution offer facile surface modification methods and novel phases to control the degradation of magnesium alloys in aggressive environments such as body fluids or marine environments. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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