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Corrosion inhibitory properties of La0.5Ca0.5MnO3-gold nanoparticles in 1 M HCl

Edobor-Osoh, Abiola and Ita, B. I. and Ajanaku, K. O. and Presa, P. de la and Ehi-Eromosele, C. O. and Fernández, Miguel Angel Cobos and Durodola, Bamidele (2019) Corrosion inhibitory properties of La0.5Ca0.5MnO3-gold nanoparticles in 1 M HCl. In: 13th Joint Conference on Chemistry (13th JCC), 2019, Online.

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The morphological, magnetic, transport and corrosion inhibitory property of La0.5Ca0.5MnO3-AuNPs prepared by sol gel method was determined. The structural property determined by XRD indicated that the unusual broadening of the Bragg’s reflection despite the elevated sintering temperature was as a result of the inhibition of the grain growth by the gold nanoparticles (Au-NPs). The morphological property of the sample as determined by SEM and TEM show heterogeneously sized and shaped nanoparticles of an average particle size of 40 nm. The magnetic measurements of La0.5Ca0.5MnO3-AuNPs showed that the sample undergoes a paramagnetic – ferromagnetic phase transition with TC = 250K and TB = 150K. Two metalinsulator transitions were observed at T1 and T2. The resistivity of the sample was observed to reduce as temperature increased to 300 K. The gravimetric method was used to determine the corrosion inhibitory properties with 1.0 M HCl using different concentration of La05Ca0.5MnO3- AuNPs. The anti-corrosion study was carried out for 21 days and was observed to reduce as concentration of La0.5Ca0.5MnO3-AuNPs increased, but corrosion rate increased as the exposure time increased. The inhibitory property of the sample increased as the concentration of the sample increased. The reaction best fitted the Langmuir isotherm, indicating a monolayer of La0.5Ca0.5MnO3-AuNPs inhibiting the corrosion of the mild steel.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Faculty of Medicine, Health and Life Sciences > School of Biological Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 02 Dec 2019 08:18
Last Modified: 02 Dec 2019 08:18

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