Nnanake Offiong - Effect of Ethanolamine and Ethylamine on the Entropy Content of the Corrosion of Mild Steel in Tetraoxosulphate (VI) acid

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  Publication Details (including relevant citation   information):

  Akpan, I.A. & Offiong, N. O. (2012). Effect of Ethanolamine   and Ethylamine on the Entropy Content of the Corrosion of Mild   Steel in Tetraoxosulphate (VI) acid. Chemistry and Materials   Research, 2(7): 40-47.


  The influence of ethanolamine and ethylamine on the corrosion   behaviour of mild steel in 1M H2SO4 solution was

  investigated at room temperature (25oC) by weight loss method.   Results obtained show that the compounds are

  better inhibitors at low concentrations (<0.3M). From the   decreasing weights of the metal over time, the

  concentrations of the metal was evaluated and plots of logarithm   of the concentration of metal versus time as well as

  Erying-type equations facilitated the access of thermodynamic   parameters such as equilibrium constant (k), enthalpy

  (ΔH*) and entropy (ΔS*) of the corrosion process. The entropy of   the aggressive ions was found to have reduced on

  introduction of the inhibitors into the corrodent medium. Attempt   to correlate the molecular structures of the

  inhibitors to the mechanism of inhibition was made.

  Address (URL): http://www.iiste.org/Journals/index.php/CMR/article/view/3545