Citrus aurantifolia leaf extract as a potential anti-corrosion additive in alkyd paint for mild steel

Mohammad Fakhratul Ridwan Zulkifli, . and Siti Nursafina Shamsul Bahrin, . and Samsuri Abdullah, . and Mohd Sabri Mohd Ghazali, . and Wan Mohd Norsani Wan Nik, . Citrus aurantifolia leaf extract as a potential anti-corrosion additive in alkyd paint for mild steel. pp. 10-20. ISSN 2672-7226

Citrus aurantifolia leaf extract (CAL) has been used as an anti-corrosion additive in alkyd paint and tested in 0.2M HCl. Fourier transform infrared (FTIR) spectroscopy showed several active functional groups and the occurrence of complexation between alkyd paint and CAL extract. Corrosion assessment of the newly modified paint was conducted by weight-loss measurements electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). Weight-loss percentage was found to decrease as the concentration of CAL extract increased for each week whereas the effect of the immersion period shows an inverse trend for each concentration. In addition the Nyquist plot exhibited an increase in the diameter of the semicircle as CAL extract concentrations increased indicating the coatings resistance towards corrosion. A morphological analysis study using a scanning electron microscope (SEM) confirmed cross-linking between CAL extract and alkyd resin while several coating defects were observed. Hence CAL extract shows an acceptable potential as anti-corrosion additive in alkyd paint for acidic medium application.

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Abstract

Citrus aurantifolia leaf extract (CAL) has been used as an anti-corrosion additive in alkyd paint and tested in 0.2M HCl. Fourier transform infrared (FTIR) spectroscopy showed several active functional groups and the occurrence of complexation between alkyd paint and CAL extract. Corrosion assessment of the newly modified paint was conducted by weight-loss measurements electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). Weight-loss percentage was found to decrease as the concentration of CAL extract increased for each week whereas the effect of the immersion period shows an inverse trend for each concentration. In addition the Nyquist plot exhibited an increase in the diameter of the semicircle as CAL extract concentrations increased indicating the coatings resistance towards corrosion. A morphological analysis study using a scanning electron microscope (SEM) confirmed cross-linking between CAL extract and alkyd resin while several coating defects were observed. Hence CAL extract shows an acceptable potential as anti-corrosion additive in alkyd paint for acidic medium application.

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Item Type:	Article
AGROVOC Term:	Citrus aurantiifolia
AGROVOC Term:	Leaf extracts
AGROVOC Term:	Sampling
AGROVOC Term:	Leaf analysis
AGROVOC Term:	Data collection
AGROVOC Term:	Reduction
AGROVOC Term:	Weight losses
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9816

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