6.
Imidazolines as Corrosion Inhibitors for N80 Steel in Hydrochloric
Acid
M.
Yadav* and Usha Sharma
Department of Applied Chemistry, ISM Dhanbad-826004, India
Email:
yadav_drmahendra@yahoo.co.in
Abstract:
An
important method of protecting metallic materials against
deterioration due to corrosion is by the use of corrosion
inhibitors. In the present investigation, synthesis and
corrosion inhibition study of two dizoline derivatives,
1-(2-aminoethyl)-2-laurylimidazoline (Inh I) and
1-(2-aminoethyl)-2-octylimidazoline (Inh II) have been performed
for N80 steel in 15% HCl using weight loss, electrochemical
polarization and SEM techniques. The inhibition efficiencies of
the inhibitors follow the sequence, Inh I > Inh II. The results
showed that inhibition efficiency of both the inhibitors
increased with increase in inhibitors concentration. Both
inhibitors act as mixed inhibitors and obey the Langmuir
adsorption isotherm. Corrosion inhibition mechanism take place
through adsorption phenomenon.
Keywords: Amino acid compounds; N80 steel; 15% HCl ; Corrosion
inhibition.
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