Thermodynamic Study of Metal Corrosion and Inhibitor Adsorption Processes in Copper/N-1-Naphthylethylenediamine Dihydrochloride Monomethanolate/Nitric Acid System: Part 2
- Publication Type
- Original research
- Authors
- A. Zarrouk
- B. Hammouti
- H. Zarrok
- S. S. Al-Deyab
- I. Warad
N-1-Naphthylethylenediamine dihydrochloride monomethanolate (N-NEDHME) was tested as a corrosion inhibitor for copper in 2 M HNO3 solution using the standard gravimetric technique at 303–343 K. N-NEDHME acts as an inhibitor for copper in an acidic medium. Inhibition efficiency increases with increase in concentration of N-NEDHME but decreases with a rise in temperature. Thermodynamic parameters such as adsorption heat ( \UpdeltaH∘ads ), adsorption entropy ( \UpdeltaS∘ads ) and adsorption free energy (\UpdeltaG∘ads) were obtained from experimental data of the temperature studies of the inhibition process at five temperatures ranging from 303 to 343 K. Kinetic parameters activation such as Ea , \UpdeltaH∘a , \UpdeltaS∘a and pre-exponential factors have been calculated and are discussed. Adsorption of N-NEDHME on the copper surface in 2 M HNO3 follows the Langmuir isotherm model.
Journal
- Title
- Research on Chemical Intermediates, Volume 38, Issue 7, pp 1655-1668
- Publisher
- --
- Publisher Country
- Palestine
- Publication Type
- Both (Printed and Online)
- Volume
- --
- Year
- 2012
- Pages
- --