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HomeMaterials Science ForumMaterials Science Forum Vol. 1042RETRACTED: Corrosion Inhibition Effect of Neem...

RETRACTED: Corrosion Inhibition Effect of Neem Leaf Oil Distillates on Low Carbon Steel in Dilute HСl and NH4Cl Acid Media

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This paper has been retracted due to publication mistake.

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Abstract:

Retracted article: Neem leaf oil distillates (NLD) was evaluated for its corrosion inhibition properties on low carbon steel in 0.5 M HCl, 1 M HCl, 3.74 M NH₄Cl and 5.61 M NH₄Cl solutions. Weight loss analysis shows NLD performed effectively at all concentrations studied in HCl media with optimal inhibition efficiencies of 97.54% and 97.56% at 5% NLD concentrations. NLD performed poorly at 1-4% NLD concentration in 3.74 M and 5.61 M NH₄Cl solutions with protection performance values below 50%. At 5% NLD concentration the protection performance values increased sharply to 78.53% and 79.0% at 312 h of exposure. Standard deviation values for NLD protection performance output in 0.5 M HCl solution were significantly high indicating highly unstable inhibition behavior and thermodynamic tendency to corrode with respect to exposure time. At 5% NLD concentration the standard deviation value decreased significantly. In 1 M HCl, 3.74 M NH₄Cl and 5.61 M NH₄Cl solutions the standard deviation values were relatively low due to improved stability of protonated NLD molecules in interaction with the steel surface. Experimental data showed 92.44%, 100%, 30.77% and 20% of NLD protection performance data from 0.5 M HCl, 1 M HCl, 3.74 M NH₄Cl and 5.61 M NH₄Cl solutions are above 70% inhibition value with margin of error of +7.99, +0, +11.22 and +9.72. Statistical data from analysis of variance showed exposure time dominates the performance output of NLD distillate on low carbon steel from 0.5 M HCl and 1 M HCl at values of 81.76% and 82.03% compared to the effect of NLD concentration which were negligible. In NH₄Cl solution, NLD concentration dominates the protection performance output of NLD on the carbon steel compared to exposure time with values of 96.42% and 96.95%.

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Advanced Materials and Application IV

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Periodical:

Materials Science Forum (Volume 1042)

Pages:

101-108

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1042.101

Online since:

August 2021

Authors:

Roland Tolulope Loto*, Kingsley Akpanyung

Keywords:

Carbon Steel, Corrosion, HCl, Neem Oil, NH₄Cl

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Creative Commons CC BY 4.0

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* - Corresponding Author

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