Exploration of the effect of Zn-MgO-UPP coating on hardness, corrosion resistance and microstructure properties of mild steel
| Autor: | Akande, Itopa Godwin, Fayomi, Ojo Sunday Isaac, Akpan, Bassey Jonah, Aogo, Olajide Abraham, Onwordi, Patrick Nwanne |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Electrochemical Science and Engineering Volume 12 Issue 5 |
| ISSN: | 1847-9286 |
| Popis: | This paper investigated the effect of unripe plantain peel (UPP) nanoparticles reinforced Zn-MgO composite coating on the hardness, anti-corrosion and microstructure properties of mild steel. The anti-corrosion characteristics of the coatings were examined using the potentiodynamic polarization method, employing 3.65 % NaCl solution as the test medium. The hardness of the coatings was studied employing the Brinell hardness technique, while the microstructure characteristics were examined using XRD and SEM/EDS. The results of the study revealed that the as-received mild steel sample exhibited the corrosion rate and hardness value of 8.6272 mm year-1 and 136.8 kgf mm-2, respectively, while the Zn-MgO coated mild steel sample exhibited a corrosion rate and hardness value of 3.6362 mm year-1 and 42.5 kgf mm-2, respectively. The optimal performing Zn-MgO-UPP coated mild steel sample (sample coated with 20 g L-1 of MgO and 6 g L-1 of UPP) exhibited a corrosion rate and hardness value of 0.8317 mm year-1 and 245.8 kgf mm-2, respectively. The corrosion rate and hardness value of the Zn-20MgO-6UPP coated mild steel sample indicated that the UPP nanoparticles further improved the passivating and strengthening ability of Zn-MgO coating. Moreover, the XRD profile of the coatings possessed high intensities, which indicated that the coatings exhibit microstructural and chemical homogeneity, high stability and good texture. It was observed on the SEM micrographs that the Zn-MgO-UPP coating exhibited a more refined microstructure compared to the Zn-MgO coating, indicating the grain refining tendency of the UPP nanoparticles. The EDS further indicated the presence of essential and dispersion strengthening elements in the coatings. |
| Databáze: | OpenAIRE |
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