The inhibition ability of chitin (CH) for carbon steel corrosion in a 1.0 M HCl solution at 298K was studied by means of weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) technique. Polarization curves revealed that CH is a mixed-type inhibitor. EIS results show that the change in the impedance parameters (R_tand C_dl) with concentration of CH is indicative of the adsorption of molecules leading to the formation of a protective layer on the surface of carbon steel. Results showed that CH is a good inhibitor for the corrosion of carbon steel in 1.0 M HCl solution and inhibition efficiency is higher than 96% at 1×10^-4 M of CH. Results indicate that the inhibition efficiencies increased with the concentration of CH. Adsorption of the inhibitor on the carbon steel surface followed Langmuir adsorption isotherm and the value of the free energy of adsorption, ΔG_ads indicated that the adsorption of CH molecule was a spontaneous process.

Title

Der Pharma Chemica

Publisher

Scholars Research Library

Publisher Country

United Kingdom

Indexing

Scopus

Impact Factor

None

Publication Type

Both (Printed and Online)

Volume

8

Year

2016

Pages

350-358