Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid

The present work focuses on the extraction of winged bean (WB) with different polarity of solvent for the application of corrosion inhibitor to reduce the corrosivity of carbon steel in 0.5 M HCl medium. It was revealed that winged bean water extract (WBW) had the highest percentage yield, followed...

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Main Author:	Zakaria, Farah Athena
Format:	Thesis
Language:	English
Published:	2022
Subjects:	QD1-65 General Including alchemy
Online Access:	http://eprints.usm.my/59424/1/FARAH%20ATHENA%20BINTI%20ZAKARIA%20-%20TESIS%20cut.pdf
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id	my-usm-ep.59424
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spelling	my-usm-ep.594242023-09-26T02:07:42Z Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid 2022-07 Zakaria, Farah Athena QD1-65 General Including alchemy The present work focuses on the extraction of winged bean (WB) with different polarity of solvent for the application of corrosion inhibitor to reduce the corrosivity of carbon steel in 0.5 M HCl medium. It was revealed that winged bean water extract (WBW) had the highest percentage yield, followed by winged bean ethanol (WBE), methanol (WBM), and hexane (WBH) extract. Further characterization using complementary analyses disclosed the values of TPC, TFC and FRAP in trend such WBW (TPC: 117.40; TFC: 54.65) > WBE (TPC: 98.52; TFC: 52.67) > WBM (TPC: 82.64; TFC: 37.29) > WBH (TPC: 23.80; TFC: 17.59). A series of phytochemical screening and HPLC analysis qualitatively show the presence of phenolic compounds like gallic acid and ferulic acid which then quantified. FTIR spectra of WB extract discovered the presence of functional groups that characterize good corrosion inhibitors. The inhibition action of WB extracts studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PD), and electrochemical noise measurement (ENM) techniques revealed that WBW and WBE inhibition efficiencies (IE) from the three different techniques at 1000 ppm were beyond 80%. Overall data obtained suggested the Langmuir adsorption isotherm and physisorption mechanism with ΔGads ≤ -20 kJ mol-1, best described the inhibitory process of both WB extracts. Further application of WB extracts as additive in sol-gel coating results in the formation of Fe-Si-O from the characterization through FTIR-ATR and SEM-EDX with good hydrophobicity with wetting angle of > 100°. 2022-07 Thesis http://eprints.usm.my/59424/ http://eprints.usm.my/59424/1/FARAH%20ATHENA%20BINTI%20ZAKARIA%20-%20TESIS%20cut.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD1-65 General Including alchemy
spellingShingle	QD1-65 General Including alchemy Zakaria, Farah Athena Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid
description	The present work focuses on the extraction of winged bean (WB) with different polarity of solvent for the application of corrosion inhibitor to reduce the corrosivity of carbon steel in 0.5 M HCl medium. It was revealed that winged bean water extract (WBW) had the highest percentage yield, followed by winged bean ethanol (WBE), methanol (WBM), and hexane (WBH) extract. Further characterization using complementary analyses disclosed the values of TPC, TFC and FRAP in trend such WBW (TPC: 117.40; TFC: 54.65) > WBE (TPC: 98.52; TFC: 52.67) > WBM (TPC: 82.64; TFC: 37.29) > WBH (TPC: 23.80; TFC: 17.59). A series of phytochemical screening and HPLC analysis qualitatively show the presence of phenolic compounds like gallic acid and ferulic acid which then quantified. FTIR spectra of WB extract discovered the presence of functional groups that characterize good corrosion inhibitors. The inhibition action of WB extracts studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PD), and electrochemical noise measurement (ENM) techniques revealed that WBW and WBE inhibition efficiencies (IE) from the three different techniques at 1000 ppm were beyond 80%. Overall data obtained suggested the Langmuir adsorption isotherm and physisorption mechanism with ΔGads ≤ -20 kJ mol-1, best described the inhibitory process of both WB extracts. Further application of WB extracts as additive in sol-gel coating results in the formation of Fe-Si-O from the characterization through FTIR-ATR and SEM-EDX with good hydrophobicity with wetting angle of > 100°.
format	Thesis
qualification_level	Master's degree
author	Zakaria, Farah Athena
author_facet	Zakaria, Farah Athena
author_sort	Zakaria, Farah Athena
title	Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid
title_short	Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid
title_full	Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid
title_fullStr	Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid
title_full_unstemmed	Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid
title_sort	winged beans extract-doped-hybrid composite sol-gel coating for corrosion resistance of carbon steel in 0.5 m hydrochloric acid
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kimia
publishDate	2022
url	http://eprints.usm.my/59424/1/FARAH%20ATHENA%20BINTI%20ZAKARIA%20-%20TESIS%20cut.pdf
_version_	1783729554312921088

Winged Beans Extract-Doped-Hybrid Composite Sol-Gel Coating For Corrosion Resistance Of Carbon Steel In 0.5 M Hydrochloric Acid

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