Authors :
H.C. Olisakwe; K.K. Ikpambeseb; T.D. Ipilakyaab; I. E. Ekengwu
Volume/Issue :
Volume 7 - 2022, Issue 1 - January
Google Scholar :
http://bitly.ws/gu88
Scribd :
https://bit.ly/3rM2ENX
DOI :
https://doi.org/10.5281/zenodo.6090626
Abstract :
The inhibitive Effect of Ficus thonningii leaves
using Maceration (Cold water) extraction method on mild
steel in 1M HCl solution was investigated using weight
loss and potentio-dynamic polarization method. The
extract hasthe potentials to contribute to the development
of renewable, biodegradable and environmentally
friendly corrosion inhibitors. The Phytochemical analysis
shows the presence of active anti corrosion constituents
such as Alkaloids, Saponins, Flavonoids, Glycosides,
Polyphenols and Tannins. Corrosion rates for all
concentration of Ficus thonningii Leaves extract
decreased steadily with increasing exposure time as well
as extract concentration, except at extract concentration
of 0.0g/dm3 where a rapid increase in corrosion rates was
observed. The inhibitive efficiency of Ficus thonningii
Leaves was 81.74% at room temperature, over immersion
period of 240 hours at extract concentration 1.0g/dm3
,
while at elevated temperatures, the inhibitive efficiency at
immersion period of 8hrs, 1.0g/dm concentration was
51.46 at 298K and 43.95 at 328K. The correlation
coefficient (R2
) value was high (0.9971 -0.9989) at room
temperature, exposure period 240 hours, it adheres to
Langmuir adsorption Isotherm. Potentiodynamic
polarization results confirms Ficus thonningii Leaves as
good corrosion inhibitors, the open circuit potential time
(OCPT) stability test shows that the leave extract was
stable at high and low (1.0g/dm3
and 0.2g/dm3
)
concentration. Ficus thonningii Leaves can be registered
as good substitute for corrosion inhibition of mild steel in
HCl solution.
Keywords :
Ficus Thonningii Leaves, Cold Water Maceration, Inhibition Efficiency, Langmuir Adsorption Isotherm And Mild Steel.
The inhibitive Effect of Ficus thonningii leaves
using Maceration (Cold water) extraction method on mild
steel in 1M HCl solution was investigated using weight
loss and potentio-dynamic polarization method. The
extract hasthe potentials to contribute to the development
of renewable, biodegradable and environmentally
friendly corrosion inhibitors. The Phytochemical analysis
shows the presence of active anti corrosion constituents
such as Alkaloids, Saponins, Flavonoids, Glycosides,
Polyphenols and Tannins. Corrosion rates for all
concentration of Ficus thonningii Leaves extract
decreased steadily with increasing exposure time as well
as extract concentration, except at extract concentration
of 0.0g/dm3 where a rapid increase in corrosion rates was
observed. The inhibitive efficiency of Ficus thonningii
Leaves was 81.74% at room temperature, over immersion
period of 240 hours at extract concentration 1.0g/dm3
,
while at elevated temperatures, the inhibitive efficiency at
immersion period of 8hrs, 1.0g/dm concentration was
51.46 at 298K and 43.95 at 328K. The correlation
coefficient (R2
) value was high (0.9971 -0.9989) at room
temperature, exposure period 240 hours, it adheres to
Langmuir adsorption Isotherm. Potentiodynamic
polarization results confirms Ficus thonningii Leaves as
good corrosion inhibitors, the open circuit potential time
(OCPT) stability test shows that the leave extract was
stable at high and low (1.0g/dm3
and 0.2g/dm3
)
concentration. Ficus thonningii Leaves can be registered
as good substitute for corrosion inhibition of mild steel in
HCl solution.
Keywords :
Ficus Thonningii Leaves, Cold Water Maceration, Inhibition Efficiency, Langmuir Adsorption Isotherm And Mild Steel.
