Investigation of the electrochemical oxidation of copper in molten NH4HF2HF

✍ Scribed by Denis J.-F. Filliaudeau; Gérard S. Picard

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 437 KB
• Volume: 38
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(93)80321-p

✦ Synopsis

The electrochemical behavior of copper in an hydrous 1.37HF-NH,HF, mixture was investigated at 25°C using voltammetric and electrochemical impedance spectroscopic techniques. A reference electrode based on a copper electrochemical system was conceived and realixed to allow the electrochemical measurements to be. performed accurately. The reaction mechanisms are complex and the experimental results can be, in a first approach, interpreted by considering the occurrence of adsorb4 species and fluoride and oxide compounds of copper at oxidation states I and II. Passivation processes were shown and electrical equivalent circuits proposed for accounting for the experimental results.