Affiliation:
1. Laboratoire de Génie des Procédés Université Amar Telidji Laghouat Algérie
2. Laboratoire de Physique de la Matière et Rayonnement (LPMR), Faculté des Sciences et de Technologie Université Mohamed Chérif Messaadia Souk‐Ahras Algérie
3. Laboratoire de Génie de l'Environnement (LGE) Université Badji Mokhtar El Hadjar‐Annaba Algérie
4. Laboratoire des Sciences de l'Ingénieur pour l'Environnement (LaSIE, UMR‐CNRS 7356), Université de La Rochelle Avenue Michel Crépeau La Rochelle France
Abstract
AbstractIn the present paper, cerium nitrate salt was used as a green inhibitor to improve the corrosion resistance of mild steel in 0.1 M Na2SO4 solution. To increase the barrier effect and film stability of the protective layer, polyethylene glycol (PEG) was added. The corrosion tests were evaluated using d.c polarization techniques and electrochemical impedance spectroscopy. The composition and morphology of the sample surface were characterized using Raman spectroscopy and MEB/EDS analysis. The results show that the presence of PEG improved relatively the corrosion resistance of mild steel due to the removal of cracks, the pores blocking the formed film and the enhancement of adhesion and compactness of the cerium‐based film. Consequently, the protective film became more coherent on the steel surface. Furthermore, the potentiodynamic polarization indicated that the Ce3+/PEG system behaved as a mixed‐type inhibitor with the dominant effect of the cathodic part.
Subject
Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry,Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry,Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry