Electrochemical behaviour of brass (Cu/Zn, 63/37) in binary mixtures of acetonitrile and water

✍ Scribed by Ravindra N. Singh; Lal Bahadur; Padma Singh

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 425 KB
• Volume: 32
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(87)87080-9

✦ Synopsis

Electrochemical behaviour of commercial brass, 63/37 (Cu/Zn) in acetonitrile (AN) and water mixtures of varying compositions (ie 2-100 m/o AN) at 30°C has been studied using accelerated weight loss method, solution analysis and potentiostatic polarization technique. It is found that during anodic polarization brass exhibits an active-passive transition in 2,5, lo,20 and 30 m/o AN, while no passivity has been observed in 50, 70, 95 and 100 m/o AN. Further the dissolution of brass has been found to he cathodically controlled. The open-zircuit potential measurements show that as AN content in the solvent mixture increases, both immersion as well as steady potentials gradually shift towards less noble direction. The weight loss and solution analvsis show oreferential dissolution of zinc in the initial stages which progress&ely decreases with time. -