Author/Authors :
Hammouch، Hind نويسنده Laboratoire d’Electrochimie de Corrosion et d’Environnement, Faculté des Sciences, Kenitra, Morocco , , Dermaj، Ahmed نويسنده Laboratory of electrochemistry and corrosion study, University Ibn Tofail, Faculty of Science, Kenitra, Morocco , , Chebabe، Driss نويسنده Laboratory of electrochemistry and corrosion study, University Ibn Tofail, Faculty of Science, Kenitra, Morocco , , Decaro، Pascal نويسنده Laboratoire de Chimie Agro-Industrielle,ENSIACET, 4 alleé Emile Monso-BP 44362, 31030 Toulouse Cedex 4 , , Hajjaji ، Najat نويسنده Laboratory of electrochemistry and corrosion study, University Ibn Tofail, Faculty of Science, Kenitra, Morocco , , Bettach، Naima نويسنده Laboratoire d’Electrochimie de Corrosion et d’Environnement, Faculté des Sciences, Kenitra, Morocco , , Takenout، Hisasi نويسنده Laboratoire Interfaces et Systèmes Electrochimiques, CNRS-UPR15, UPMC, Paris, France , , Srhiri، Abdellah نويسنده Laboratory of electrochemistry and corrosion study, University Ibn Tofail, Faculty of Science, Kenitra, Morocco ,
Abstract :
The aim of this work is to characterise seed oil of opuntia ficus indica and to
develop a new formulation to inhibit carbon steel corrosion in acidic medium. “OTH”, is a
new environmentally friendly corrosion inhibitor containing Opuntia ficus indica seed oil.
Fatty acid composition was analysed by Gas-chromatography after transesterification to Fatty
Methyl esters (FAMES). The Electrochemical Impedance Spectroscopy (EIS) and
voltamperometry measurements were carried out for different concentrations and immersion
times. Surface analyses were carried out by Scanning Electron Microscopy (SEM) and
Energy Dispersive X-ray Spectroscopy (EDS). The results obtained show that the main fatty
acids of prickly pear seed oil were C16:0, C18:0, C18:1, C18:2. The content of unsaturated
fatty acids was high (83%). Electrochemical measurements show that OTH acts as a good
mixed corrosion inhibitor. This inhibitor formulation forms a thick film that plays a barrier
layer on the iron surface to minimize the contact area with corrosive solution and hinder
metal oxidation.
