Page 17 - IPCoSME 2021

1 INTERNATIONAL POSTGRADUATE CONFERENCE ON SCIENCE AND MARINE ENVIRONMENT 2021
st
(IPCoSME 2021)
“Environmental Sustainability Enhancement Through the Collaboration of Sciences”

RA-04

CORROSION PROTECTION OF MILD STEEL IN SEAWATER USING GREEN
APPROACH FROM Leucaena leucocephala LEAVES EXTRACT

1
NURSABRINA AMIRAH BINTI MOHD NASIR AND MOHD SABRI MOHD
GHAZALI 1

1 Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala
Nerus, Terengganu, MALAYSIA

*Corresponding author email: mohdsabri@umt.edu.my

Abstract: The corrosion inhibition analysis of Leucaena leucocephala leaves extract (LLE) as
an additive in a commercialized coating to protect mild steel immersed in seawater has been

conducted. The experiments were evaluated by Fourier transform infrared spectroscopy

(FTIR), ultraviolet-visible spectroscopy (UV-Vis), electrochemical impedance spectroscopy
(EIS), potentiodynamic polarization and scanning electron microscope with energy-dispersive

X-ray spectroscopy (SEM/EDS). The FTIR analysis revealed both hydroxyl (–OH) and
carbonyl (C=O) groups, possibly indicating the presence of phenolic compounds in the extract,

whereas the UV-Vis analysis revealed a peak absorption spectrum at 268 nm. The
electrochemical analysis revealed that the immersed mild steel coated with 6% LLE coating

had an excellent inhibition efficiency of up to 96.12 %. The study also confirmed that LLE acts

as a mixed type inhibitor, as shown in the polarization curve.

Keywords: stainless steel, corrosion, coating, seawater, plant extract

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