Electrochemical and spectroscopic evidences of corrosion inhibition of bronze by a triazole derivative - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2007

Electrochemical and spectroscopic evidences of corrosion inhibition of bronze by a triazole derivative

Résumé

The electrochemical behavior of the bronze (Cu–8Sn in wt%) was investigated in 3% NaCl aqueous solution, in presence and in absence of a corrosion inhibitor, the 3-phenyl-1,2,4-triazole-5-thione (PTS). The inhibiting effect of the PTS was evidenced for concentrations higher than 1 mM for the cathodic process whereas its effect was clearly seen with a concentration as low as 0.1 mM for the anodic process. A significant positive shift of the corrosion potential was also observed, and its inhibiting effect increased with both its concentration and the immersion time of the sample. From voltammetry and electrochemical impedance spectroscopy experiments, the inhibiting efficiency of the PTS was found to be in the 94–99% range for 1 mM concentration. Scanning electron microscopy and X-ray energy dispersion analysis of the specimen surface show the presence of sulphur on the surface. Raman micro-spectrometry study confirms the protective effect of the PTS in aqueous solution through three types of interactions with the electrode, namely the adsorption of the inhibitor in a flat configuration, the formation of copper-thiol molecules, and when copper is released, the formation of a polymeric complex.
Fichier principal
Vignette du fichier
Dermaj2007.pdf (916.38 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04152607 , version 1 (07-12-2023)

Identifiants

Citer

Ahmed Dermaj, Najat Hajjaji, Suzanne Joiret, Kamal Rahmouni, Abdellah Srhiri, et al.. Electrochemical and spectroscopic evidences of corrosion inhibition of bronze by a triazole derivative. Electrochimica Acta, 2007, 52 (14), pp.4654-4662. ⟨10.1016/j.electacta.2007.01.068⟩. ⟨hal-04152607⟩
31 Consultations
11 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More