Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution
The corrosion behavior of metal matrix composites (MMCs) is accelerated by the inclusion of reinforcements. Hence, this study investigates the corrosion behavior of MMCs produced from Al 6063 matrix alloy with reinforcement particulates of silicon carbide (SiC) and palm kernel shell ash (PKSA) inclu...
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MDPI AG
2022-09-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/6/10/286 |
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| author | Peter Ikubanni Makanjuola Oki Adekunle Adeleke Olanrewaju Adesina Peter Omoniyi Esther Akinlabi |
| author_facet | Peter Ikubanni Makanjuola Oki Adekunle Adeleke Olanrewaju Adesina Peter Omoniyi Esther Akinlabi |
| author_sort | Peter Ikubanni |
| collection | DOAJ |
| description | The corrosion behavior of metal matrix composites (MMCs) is accelerated by the inclusion of reinforcements. Hence, this study investigates the corrosion behavior of MMCs produced from Al 6063 matrix alloy with reinforcement particulates of silicon carbide (SiC) and palm kernel shell ash (PKSA) inclusion at different mix ratios. The MMCs were synthesized using the double stir casting technique. The corrosion behaviors of the composites in NaCl solutions were studied via gravimetric analysis and electrochemical measurements. The gravimetric analysis showed fluctuating dissolution rate of the samples in NaCl solution to indicate flawed film as well as corrosion product formation over the surface of the specimens. The observed corrosion mechanism of the samples was general and pitting corrosion. The presence of reinforcements within the Al6063 matrix acted as active sites for corrosion initiation. The range of values for E<sub>corr</sub> and I<sub>corr</sub> obtained in 3.5% NaCl at 24 h was between −220.62 and −899.46 mV and between 5.45 and 40.87 µA/cm<sup>2</sup>, respectively, while at 72 h, the E<sub>corr</sub> values ranged from 255.88 to −887.28 mV, and the I<sub>corr</sub> ranged from 7.19 to 16.85 µA/cm<sup>2</sup>. The Nyquist and Bode plots revealed the electrochemical corrosion behavior of the samples under investigation, with predominant reactions on the surface of the samples linked to charge transfer processes. The relative resistance to corrosion of the samples depends on the thin oxide film formed on the surface of the samples. |
| first_indexed | 2024-03-09T03:35:20Z |
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| issn | 2504-477X |
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| last_indexed | 2024-03-09T03:35:20Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
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| series | Journal of Composites Science |
| spelling | doaj.art-3b9498e0996e41028a20c84ec75d64ab2023-12-03T14:49:17ZengMDPI AGJournal of Composites Science2504-477X2022-09-0161028610.3390/jcs6100286Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl SolutionPeter Ikubanni0Makanjuola Oki1Adekunle Adeleke2Olanrewaju Adesina3Peter Omoniyi4Esther Akinlabi5Department of Mechanical Engineering, College of Engineering, Landmark University, Omu-Aran 251101, NigeriaDepartment of Mechanical Engineering, College of Engineering, Landmark University, Omu-Aran 251101, NigeriaDepartment of Mechanical Engineering, Faculty of Engineering, Nile University of Nigeria, Abuja 900001, NigeriaDepartment of Mechanical Engineering, College of Engineering, Redeemers’ University, Ede 232101, NigeriaDepartment of Mechanical Engineering, University of Ilorin, Ilorin 240243, NigeriaMechanical and Construction Engineering Department, Northumbria University, Newcastle NE1 8ST, UKThe corrosion behavior of metal matrix composites (MMCs) is accelerated by the inclusion of reinforcements. Hence, this study investigates the corrosion behavior of MMCs produced from Al 6063 matrix alloy with reinforcement particulates of silicon carbide (SiC) and palm kernel shell ash (PKSA) inclusion at different mix ratios. The MMCs were synthesized using the double stir casting technique. The corrosion behaviors of the composites in NaCl solutions were studied via gravimetric analysis and electrochemical measurements. The gravimetric analysis showed fluctuating dissolution rate of the samples in NaCl solution to indicate flawed film as well as corrosion product formation over the surface of the specimens. The observed corrosion mechanism of the samples was general and pitting corrosion. The presence of reinforcements within the Al6063 matrix acted as active sites for corrosion initiation. The range of values for E<sub>corr</sub> and I<sub>corr</sub> obtained in 3.5% NaCl at 24 h was between −220.62 and −899.46 mV and between 5.45 and 40.87 µA/cm<sup>2</sup>, respectively, while at 72 h, the E<sub>corr</sub> values ranged from 255.88 to −887.28 mV, and the I<sub>corr</sub> ranged from 7.19 to 16.85 µA/cm<sup>2</sup>. The Nyquist and Bode plots revealed the electrochemical corrosion behavior of the samples under investigation, with predominant reactions on the surface of the samples linked to charge transfer processes. The relative resistance to corrosion of the samples depends on the thin oxide film formed on the surface of the samples.https://www.mdpi.com/2504-477X/6/10/286palm kernel shell ashaluminum matrix compositesilicon carbidephysicomechanical propertiesmicrostructure |
| spellingShingle | Peter Ikubanni Makanjuola Oki Adekunle Adeleke Olanrewaju Adesina Peter Omoniyi Esther Akinlabi Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution Journal of Composites Science palm kernel shell ash aluminum matrix composite silicon carbide physicomechanical properties microstructure |
| title | Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution |
| title_full | Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution |
| title_fullStr | Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution |
| title_full_unstemmed | Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution |
| title_short | Electrochemical Studies of the Corrosion Behavior of Al/SiC/PKSA Hybrid Composites in 3.5% NaCl Solution |
| title_sort | electrochemical studies of the corrosion behavior of al sic pksa hybrid composites in 3 5 nacl solution |
| topic | palm kernel shell ash aluminum matrix composite silicon carbide physicomechanical properties microstructure |
| url | https://www.mdpi.com/2504-477X/6/10/286 |
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