New electrochemical method for the determination of the barrier properties of corrosion protective coatings
A novel electrochemical method evaluates the durability of corrosion protective coatings by measuring the galvanic current between a coated AZ31 Mg alloy and a Pt auxiliary electrode in a 2 M NaCl solution. In this work an organo-inorganic sol-gel film was used. The durability criterion, t, was sele...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/366580 |
| Acceso en línea: | http://hdl.handle.net/10261/366580 |
| Access Level: | acceso abierto |
| Palabra clave: | Electrochemical method Galvanic current EIS Protective coating Corrosion protection |
| Sumario: | A novel electrochemical method evaluates the durability of corrosion protective coatings by measuring the galvanic current between a coated AZ31 Mg alloy and a Pt auxiliary electrode in a 2 M NaCl solution. In this work an organo-inorganic sol-gel film was used. The durability criterion, t, was selected as the time where the galvanic current reached 1 mA. Validated using EIS, the method showed 82 % accuracy. However, this difference was not deemed statistically significant. Under the conditions used in this study, results from the new method align with traditional EIS, establishing its viability as a simple and straightforward tool for assessing the barrier properties of corrosion protective coatings. |
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