The Inhibition of C-steel Corrosion in H 3 PO 4 Solution by Some Furfural Hydrazone Derivatives
作者： A.S. Fouda , G.E. Badr , M.N. El-Haddad
DOI: 10.5012/JKCS.2008.52.2.124
关键词:
摘要: The effect of some furfural hydrazone derivatives (I -V) as corrosion inhibitors for C-steel in 3M H 3 PO 4 solution which M indicates mol/l has been studied using weight-loss and galvanostatic polarization techniques. A significant decrease the rate was observed presence investigated compounds. This study revealed that, inhibition efficiency increases with increasing inhibitor concentration, addition iodide thiocynate ions enhances it to a considerable extent. temperature on behavior range from 30-60°C without 5×10 -6 compounds method. Apparent activation energy (E *) other thermodynamic parameters process were calculated discussed. measurements show that act mixed-type inhibitors, but cathode is more polarized when an external current applied. adsorption these surface obeys Frumkin's isotherm. mechanism discussed light chemical structure
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