Effect of Acidic Environment on Cu-Al2O3 Codeposition

Mihaela-Daniela GAVRIL (DONOSE); Constantin GHEORGHIEŞ; Alina-Mihaela CANTARAGIU; Denys Cristina VLADU (RADU); Sorin DONOSE

Auteur/ices

Mihaela-Daniela GAVRIL (DONOSE) "Dunarea de Jos" University of Galati, Romania
Constantin GHEORGHIEŞ "Dunarea de Jos" University of Galati, Romania
Alina-Mihaela CANTARAGIU "Dunarea de Jos" University of Galati, Romania
Denys Cristina VLADU (RADU) "Dunarea de Jos" University of Galati, Romania
Sorin DONOSE 41 ”Grigore Teologul” School, Galati, Romania

Mots-clés :

electrocodeposition, cooper, alumina, corrosion, Tafel curves

Résumé

Electrocodeposition of alumina nanoparticles with copper onto nickel substrate was prepared through the potentiostatic method. The codeposited films were obtained at different nanoparticle concentrations: 5, 10, 15, 20 and 25 gL^-1. The corrosion behaviour of codeposited films has been observed by introducing them in different corrosive environments: 0.5 M H₂SO₄, HCl and HNO₃ solutions. The corrosion study has been realized using the linear polarization method. The corrosion rate and polarisation resistance values were obtained from the Tafel curves. The highest concentration of alumina nanoparticles had increased the corrosion resistance of Cu-Al₂O₃ codeposited films. Also, in order to confirm these results, the gravimetric parameter was calculated by means of the mass loss method.