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Comparison of Electrochemical Methods for the Evaluation of Cast AZ91 Magnesium Alloy
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SYSNO ASEP 0467734 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Comparison of Electrochemical Methods for the Evaluation of Cast AZ91 Magnesium Alloy Author(s) Tkacz, J. (CZ)
Minda, J. (CZ)
Fintová, Stanislava (UFM-A) ORCID
Wasserbauer, J. (CZ)Number of authors 4 Article number 925 Source Title Materials. - : MDPI
Roč. 9, č. 11 (2016)Number of pages 14 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords AZ91 magnesium alloy ; cathodic polarization curve ; anodic polarization curve ; linear polarization curve Subject RIV JK - Corrosion ; Surface Treatment of Materials Institutional support UFM-A - RVO:68081723 UT WOS 000390114400011 EID SCOPUS 85002152419 DOI 10.3390/ma9110925 Annotation Linear polarization is a potentiodynamic method used for electrochemical characterization of materials. Obtained values of corrosion potential and corrosion current density offer information about material behavior in corrosion environments from the thermodynamic and kinetic points of view, respectively. The present study offers a comparison of applications of the linear polarization method (from −100 mV to +200 mV vs. EOCP), the cathodic polarization of the specimen (−100 mV vs. EOCP), and the anodic polarization of the specimen (+100 mV vs. EOCP), and a discussion of the differences in the obtained values of the electrochemical characteristics of cast AZ91 magnesium alloy. The corrosion current density obtained by cathodic polarization was similar to the corrosion current density obtained by linear polarization, while a lower value was obtained by anodic polarization. Signs of corrosion attack were observed only in the case of linear polarization including cathodic and anodic polarization of the specimen. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2017
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