Vol. 6, Issue 4 (2018)
Optimization of corrosion inhibition of Picralima nitida seed extracts as a green corrosion inhibitor for zinc in 0.5 M H2SO4
Author(s): Joseph NO Ezeugo
Abstract: Optimization of inhibitive action of ethanol extract of Picralima nitida seed, towards acid corrosion of zinc is tested using weight loss, and thermometric methods. It was found that the extract acted as a good corrosion inhibitor for zinc corrosion in 0.5 M H2SO4 solution. Further examination revealed that the adsorption of the extract on zinc surface is governed by spontaneous process. The inhibition efficiency increases as extract concentrations increases. Results of the FT-IR analysis of the seed extracts on pure and corroded product showed a gradual shift of the corrosion mechanism as 3971.7cm-1 stretch bond of aliphatic and aromatic shifted to 3948.54cm-1 strong and broad O-H alcohol. While 2798.26cm-1 C≡C stretch bond of aldehyde shifted to 2416.12cm-1 O-H,stretch bond of carboxylic acid at a strong and very broad intensity. Optimal inhibition efficiency, IE (%) of 77.54 was obtained at optimum inhibitor concentration of 1.2gl-1, temperature and time of 313k and 8 hrs respectively.
Pages: 2080-2088 | 427 Views 63 Downloads
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How to cite this article:
Joseph NO Ezeugo. Optimization of corrosion inhibition of Picralima nitida seed extracts as a green corrosion inhibitor for zinc in 0.5 M H2SO4. Int J Chem Stud 2018;6(4):2080-2088.
