Chitosan Schiff base as eco-friendly inhibitor for mild steel corrosion in 1 M HCI
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Date
2016
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Abstract
In the present study, natural biopolymer chitosan was modified into its
Schiff base derivative with salicylaldehyde by condensation method.'
The prepared chitosan salicylaldehyde Schiff base was characterized
using ultraviolet spectroscopy, fouriertransform infrared spectroscopy,
'scanning electron microscope and elemental analysis. Thermal
analysis was also carried out to determine the thermal stability of
. the derivative. To explore the corrosion inhibition performance of
the chitosan Schiff base, weight loss, and electrochemical techniques
were conducted. The inhibitor reduces the metallic corrosion by
adsorbing on to the metal surface. The adsorption of chitosan Schiff
base on mild steel surface in 1 M HCI followsTemkin isotherm model.
Thermodynamic parameters of adsorption and corrosion process
were calculated, which revealed the chemical nature of adsorption.
SEM and energy dispersive X-ray spectroscopic analysis confirmed
the formation of protective chitosan derivative layer oh the mild steel
surface.