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IJCT Vol.12(4) [July 2005] >


Title: Corrosion inhibition of carbon steel by adipic acid – Zn2+ system
Authors: Florence, G Ruba Helen
Anthony, A Noreen
Sahayaraj, J Wilson
Amalraj, A John
Rajendran, Susai
Keywords: Carbon steel
corrosion inhibition
adipic acid
well water
zinc ion
Issue Date: Jul-2005
Publisher: CSIR
IPC CodeC23F11/00
Abstract: The inhibition efficiency (IE) of adipic acid (AA)-Zn2+ system in controlling corrosion of carbon steel immersed in well water has been evaluated by weight-loss method. The formulation consisting of 50 ppm of AA and 50 ppm of Zn2+ has 95% IE. At lower pH value(pH=6) IE decreases and in alkaline medium (pH=8) IE increases. Polarization study reveals that AA- Zn2+ system functions as a mixed inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Fe2+-AA complex and Zn(OH)2.
Page(s): 472-476
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.12(4) [July 2005]

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