| The Inhibition Effect of Heterocyclic Compounds towards the Corrosion of Iron in Phosphoric Media (2008) | |||||||||
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| The behaviour of the 316 stainless steel in polluted phosphoric acid, has been studied in absence and presence of [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-phenyl-methyl]-urea (HPU1) and [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)-methyl]-urea (HPU2) at different concentrations, Potentiodynamic and electrochemical impedance measurements showed that these compound act as cathodic inhibitors, The SEM analysis showed that theses inhibitors acts by establishment of a thin film at the metal surface. The film, act as a barrier to the transport of the metal ions from the metal to the solution at high concentration of inhibitor. | |||||||||
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