| Autor: |
Ojo Sunday Isaac Fayomi, Adedamola Sode, Itopa Godwin Akande, Abimbola Patricia Idowu Popoola, Oluranti Agboola |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
AIMS Materials Science, Vol 7, Iss 4, Pp 441-452 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2372-0484 |
| DOI: |
10.3934/matersci.2020.4.441/fulltext.html |
| Popis: |
Hydrated crystal of ZnSO4·7H2O was co-deposited with NiSO4·6H2O, and NaH2PO2·H2O processed electrolyte to develop a ternary phase electroless coating on mild steel for advanced application. The coating was produced in an aqueous nickel electrolyte solution with zinc at a temperature of 90 ℃ and varying time conditions between 20 and 50 min. The effects of the developed coatings on microstructure and physical properties were investigated using scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS), and optical microscopy. The corrosion characteristics of the coatings examined in 0.5 M H2SO4 and 3.5% NaCl were analyzed using linear potentiodynamic polarization technique. The microstructure revealed that the constituent deposited on the steel. A more uniformly distributed crystallite with minimal pores was observed at 20 min of Ni-P-Zn coating, while the tiniest film was observed at 50 min of the coating without crack. There was also a fully compact grain within the intermetallic matrix of the coating due to the synergetic effect of the electrolyte constituent with the strengthening phase of Zn7Ni4P2, Zn2Ni5P, and Zn3Ni. Corrosion study established that Ni-P-Zn exhibits significant corrosion resistance at the optimum time within the examined environments with little SO42- and Cl- ions. |
| Databáze: |
Directory of Open Access Journals |
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