Title: Adsorption and corrosion inhibition properties of floxapen compound on the electrochemical characteristics of type-A5-series aluminium in sodium chloride solution

Authors: O.S.I. Fayomi; O.A. Bamgboye; B.M. Durodola; W.A. Inam; A.A. Daniyan

Addresses: Department of Mechanical Engineering, Covenant University, Ota, Ogun State, 1024, Nigeria ' Department of Chemistry, Covenant University, ad, Ota, Ogun State, 1024, Nigeria ' Department of Chemistry, Covenant University, ad, Ota, Ogun State, 1024, Nigeria ' Department of Chemistry, Covenant University, ad, Ota, Ogun State, 1024, Nigeria ' Department of Materials Science and Engineering, Obafemi Awolowo University, Ile-Ife, 234, Nigeria

Abstract: The inhibition performance of floxapen compounds on the electrochemical corrosion behaviour of A5 series aluminium in 3.5% NaCl acid solutions was studied through weight loss method and potentiodynamic polarisation test. The results obtained showed that the organic drug compound performed effectively in sodium chloride solutions with average floxapen compounds inhibition efficiency of 68% from weight loss and potentiodynamic polarisation test respectively. Results from corrosion thermodynamic calculations showed that the adsorption of floxapen compounds onto the aluminium was through chemisorption mechanism whereby the redox electrochemical progression responsible for corrosion initiation and the electrolytic transport of corrosive anions were concurrently suppressed. Adsorption of the compound was determined to obey the Langmuir and Frumkin isotherm model.

Keywords: aluminium; inhibitor; corrosion; NaCl; adsorption; floxapen.

DOI: 10.1504/IJMMP.2017.092165

International Journal of Microstructure and Materials Properties, 2017 Vol.12 No.5/6, pp.391 - 401

Received: 11 Oct 2017
Accepted: 08 Jan 2018
Published online: 06 Jun 2018 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article