Experimental Apparent Stern-Geary Coefficients for AZ31B Mg Alloy in Physiological Body Fluids for Accurate Corrosion Rate Determination
| Autor: | Violeta Barranco, Sebastián Feliu, Santiago Fajardo, Federico R. García-Galván |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2021 |
| Předmět: |
lcsh:TN1-997
Tafel slopes Tecnología de materiales Materials science Simulated body fluid Alloy Analytical chemistry Potentiodynamic polarization 02 engineering and technology engineering.material Metalurgia 010402 general chemistry Electrochemistry 01 natural sciences Corrosion Physiological solution magnesium alloys X-ray photoelectron spectroscopy Materiales biocompatibles General Materials Science corrosion rate lcsh:Mining engineering. Metallurgy Corrosion rate EIS potentiodynamic polarization Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences Dielectric spectroscopy Electroquímica Corrosión Magnesium alloys engineering weight loss 0210 nano-technology Test solution |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Metals, Vol 11, Iss 391, p 391 (2021) ABACUS. Repositorio de Producción Científica Universidad Europea (UEM) Metals Volume 11 Issue 3 |
| Popis: | The corrosion behavior of AZ31B Mg alloy exposed to Ringer's, phosphate-buffered saline (PBS), Hank's, and simulated body fluid (SBF) solutions for 4 days was investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, weight loss, and surface characterization. Changes in corrosion rates with immersion time determined by weight loss measurements were compared with EIS data to determine the possibility of obtaining quantitative electrochemical information. In addition, changes in the protective properties of the corrosion product layer calculated from the EIS parameters were evaluated as a function of their surface chemical composition as determined by X-ray photoelectron spectroscopy (XPS) and visual observations of the corroded specimen's surface. Apparent Stern-Geary coefficients for the AZ31B Mg alloy in each test solution were calculated using the relationship between i(corr) from weight loss measurements and the EIS data (both R-p and R-t). This provided experimental reference B ' values that may be used as a useful tool in independent investigations to improve the accuracy of corrosion rates of AZ31B Mg alloy in simulated body solutions. This research was funded by the Spanish Ministry of Economy and Competitiveness (project MAT2015-65445-C2-1-R). S.F. expresses his gratitude to the State Research Agency (Ministry of Science and Innovation of Spain), the Spanish National Research Council (CSIC) and the European Regional Development Fund (ERDF) for the funfing under the project RYC2019-027006-I (AEI/FEDER/UE). |
| Databáze: | OpenAIRE |
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