EFFECT OF CITRATE IONS ON THE ELECTRO CHEMICAL BEHAVIOUR OF MILD STEEL IN TIPA – Zn2+ SYSTEM

Y.BRIGHTSON ARUL JACOB

Abstract


The inhibition efficiency (IE) of various concentrations of a TIPA-TSC-Zn2+ system in controlling corrosion of mild steel immersed in aqueous solution containing 60ppm Cl- was evaluated by a weight loss study. The formulation consisting of 100 ppm of TIPA and 50 ppm of Zn2+ showed 62% inhibition efficiency. When TSC (250ppm) is added the inhibition efficiency increases to 100%. In the presence of TSC has excellent inhibition efficiency. Polarization studies reveal that TIPA-TSC-Zn2+ function as an anodic inhibitor. AC impedance spectra suggest that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Fe2+ - TIPA, Fe2+ - TSC complex and Zn(OH)2 .


Full Text:

PDF


DOI: http://dx.doi.org/10.17628/ecb.2013.2.293-297

Refbacks

  • There are currently no refbacks.


 

*********************** European Chemical Bulletin *******************