Corrosion inhibition of aluminum 6063 using some pharmaceutical compounds
- 24 September 2009
- journal article
- Published by Pleiades Publishing Ltd in Protection of Metals and Physical Chemistry of Surfaces
- Vol. 45 (5), 635-643
- https://doi.org/10.1134/s2070205109050244
Abstract
The corrosion inhibition characteristics of some pharmaceutical compounds on aluminium 6063 in 0.5 mol l−1 H3PO4 has been studied using weight loss and galvanostatic polarization techniques. Results showed that the inhibition occurs through adsorption of the inhibitor molecules on the metal surface. The inhibition efficiency increased with increasing inhibitor concentration, but decreased with increasing temperature. The adsorption of first group pharmaceutical compounds on the metal surface is found to obey Frumkin’s adsorption isotherm, but the adsorption of second group pharmaceutical compounds is found to obey Temkin’s adsorption isotherm. Thermodynamic parameters for adsorption process were determined. Galvanostatic polarization studies showed that first and second groups’ pharmaceutical compounds are mixed-type inhibitors and the results obtained from the two techniques are in good agreement.Keywords
This publication has 9 references indexed in Scilit:
- Dianils as new and effective corrosion inhibitors for mild steel in acidic solutionsMaterials Chemistry and Physics, 2003
- Dithiazolidines—A New Class of Heterocyclic Inhibitors for Prevention of Mild Steel Corrosion in Hydrochloric Acid SolutionCorrosion, 2002
- An investigation of some Schiff bases as corrosion inhibitors for austenitic chromium–nickel steel in H2SO4Journal of Applied Electrochemistry, 2001
- Corrosion inhibition of carbon and low alloy steels in sulphuric acid solutions by 2‐mercaptopyrimidine derivativesMaterials and Corrosion, 1993
- Thermodynamic and kinetic factors in chloride ion pitting and nitrogen donor ligand inhibition of aluminium metal corrosion in aggressive acid mediaJournal of the Chemical Society, Faraday Transactions, 1993
- The inhibition action of heterocyclic nitrogen organic compounds on Fe and steel in HCl mediaCorrosion Science, 1992
- The protective action of epoxy resins and curing agents—inhibitive effects on the aqueous acid corrosion of iron and steelCorrosion Science, 1988
- Adsorption of n‐Decylamine on Zinc from Acidic Chloride SolutionJournal of the Electrochemical Society, 1977
- Electrochemical PolarizationJournal of the Electrochemical Society, 1957