Application of Xylopia aethiopica Seed Extract as Aluminium Alloy Corrosion Inhibitor in 0.75 M KOH Alkaline Solution | Chapter 9 | Advances and Trends in Physical Science Research Vol. 2
Corrosion
phenomena, control and
prevention are unavoidable
scientific issues that
should be addressed due to
increase of technological development. Aluminium (Al) is one of the most
abundant elements found in the earth’s crust. The applications site of Almakes
it to yield corrosion attack despite its corrosion resistance. The aim of
alloying is to enhance the desired properties possessed by the Al. Plant
extracts are rich source of naturally synthesised chemical compounds that can
be extracted by simple procedure. The present study investigated the corrosion
inhibition of Al alloy in 0.75 M KOH
solution at room
temperature using Xylopia aethiopicaseed extract.
The gravimetric technique was employed in the study. It was revealed
that the presence of the spice extract in the test solution retards the
corrosion rate. The calculated
inhibition efficiency from the inhibitor surface coverage was observed to
increase linearly with the inhibitor concentration. The consideration of the
Langmuir adsorption isotherm indicated that the mechanism of adsorption is
Physisorption. Temkin isotherm models explained that there were lateral
attractions of the inhibitor molecules on the Al alloy surface. Flory-Huggins
isotherm model confirms that there is bulky displacement of water molecules
on the
metal surface due
to the presence
of the inhibitor
molecules. This depicts that the spice constituents clustered on the Al alloy
surface preventing contact with the corrosive environment.
Biography
of author(s)
O. F. Nwosu
Department of Physics/Electronics, Abia State Polytechnic, PMB 7166 Aba, Abia State, Nigeria.
Department of Physics, University of Port Harcourt, PMB 5323 Choba, Rivers State, Nigeria.
Department of Physics/Electronics, Abia State Polytechnic, PMB 7166 Aba, Abia State, Nigeria.
Department of Physics, University of Port Harcourt, PMB 5323 Choba, Rivers State, Nigeria.
E. Osarolube
Department of Physics, University of Port Harcourt, PMB 5323 Choba, Rivers State, Nigeria
Department of Physics, University of Port Harcourt, PMB 5323 Choba, Rivers State, Nigeria
Read full article: http://bp.bookpi.org/index.php/bpi/catalog/view/25/67/155-1
View Volume: https://doi.org/10.9734/bpi/atpsr/v2
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