Corrosion Performance of Cu-Based Coins in Artificial Sweat
The performance of different Cu-based coins in artificial sweat was evaluated. The electrochemical behavior of the coins was determined by potentiodynamic polarization curves, linear polarization resistance, and electrochemical impedance spectroscopy. Regardless of the chemical composition of the Cu...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2016/9542942 |
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| author | J. Porcayo-Calderon R. A. Rodríguez-Díaz E. Porcayo-Palafox L. Martinez-Gomez |
| author_facet | J. Porcayo-Calderon R. A. Rodríguez-Díaz E. Porcayo-Palafox L. Martinez-Gomez |
| author_sort | J. Porcayo-Calderon |
| collection | DOAJ |
| description | The performance of different Cu-based coins in artificial sweat was evaluated. The electrochemical behavior of the coins was determined by potentiodynamic polarization curves, linear polarization resistance, and electrochemical impedance spectroscopy. Regardless of the chemical composition of the Cu-based coins, they showed similar polarization curves; particularly, the observed similarity in the anodic zone suggests that the corrosion mechanism is the same in all cases. The presence of Ni and Zn does not appreciably affect the corrosion resistance of Cu. However, the presence of both elements affects the corrosion resistance of Cu. Electrochemical impedance spectroscopy measurements showed the presence of three time constants with very similar characteristics, again indicating that the main corrosion mechanism is the same in all cases. Equivalent circuits confirmed that the corrosion performance of the Ni-Zn-Cu coins depends on the Zn/Ni ratio, such that decreasing this value decreases the corrosion resistance of the alloy. In general, nickel has a detrimental effect due to the formation of highly soluble Ni-based corrosion products. |
| format | Article |
| id | doaj-art-fb4f4f10044143ef9976e23f840d456e |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-fb4f4f10044143ef9976e23f840d456e2025-02-03T01:12:10ZengWileyJournal of Chemistry2090-90632090-90712016-01-01201610.1155/2016/95429429542942Corrosion Performance of Cu-Based Coins in Artificial SweatJ. Porcayo-Calderon0R. A. Rodríguez-Díaz1E. Porcayo-Palafox2L. Martinez-Gomez3CIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, MexicoUniversidad Politécnica del Estado de Morelos, Boulevard Cuauhnahuac 566, Col. Lomas del Texcal, 62574 Jiutepec, MOR, MexicoCIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, MexicoInstituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Avenida Universidad s/n, 62210 Cuernavaca, MOR, MexicoThe performance of different Cu-based coins in artificial sweat was evaluated. The electrochemical behavior of the coins was determined by potentiodynamic polarization curves, linear polarization resistance, and electrochemical impedance spectroscopy. Regardless of the chemical composition of the Cu-based coins, they showed similar polarization curves; particularly, the observed similarity in the anodic zone suggests that the corrosion mechanism is the same in all cases. The presence of Ni and Zn does not appreciably affect the corrosion resistance of Cu. However, the presence of both elements affects the corrosion resistance of Cu. Electrochemical impedance spectroscopy measurements showed the presence of three time constants with very similar characteristics, again indicating that the main corrosion mechanism is the same in all cases. Equivalent circuits confirmed that the corrosion performance of the Ni-Zn-Cu coins depends on the Zn/Ni ratio, such that decreasing this value decreases the corrosion resistance of the alloy. In general, nickel has a detrimental effect due to the formation of highly soluble Ni-based corrosion products.http://dx.doi.org/10.1155/2016/9542942 |
| spellingShingle | J. Porcayo-Calderon R. A. Rodríguez-Díaz E. Porcayo-Palafox L. Martinez-Gomez Corrosion Performance of Cu-Based Coins in Artificial Sweat Journal of Chemistry |
| title | Corrosion Performance of Cu-Based Coins in Artificial Sweat |
| title_full | Corrosion Performance of Cu-Based Coins in Artificial Sweat |
| title_fullStr | Corrosion Performance of Cu-Based Coins in Artificial Sweat |
| title_full_unstemmed | Corrosion Performance of Cu-Based Coins in Artificial Sweat |
| title_short | Corrosion Performance of Cu-Based Coins in Artificial Sweat |
| title_sort | corrosion performance of cu based coins in artificial sweat |
| url | http://dx.doi.org/10.1155/2016/9542942 |
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