The influence of chloride ions on the dynamic characteristics observed at the transition between corrosion and passivation states of an iron electrode in sulphuric acid solutions

✍ Scribed by Dimitra Sazou; Michael Pagitsas; Christos Georgolios

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 964 KB
• Volume: 37
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(92)87123-h

✦ Synopsis

Ah&r&-The role of chlonde ions on the current oscdlatlons of relaxation type at the transition of iron between the active and passive states m sulphunc acid solutions IS mvestlgated Plttmg corrosion occurs m the presence of chlonde ions The penodlc relaxation osclllatlons observed m the absence of chlonde become apenodlc and finally disappear under stationary conditions of the Fe disc electrode m the presence of chlonde However, under rotational condltlons, quaslpenodlc and chaotic oscillations are observed upon gradually increasing the chlonde additions The nch dynamical response of the system Fe/2M H,SO, + x M Cl-, under various conditions of chloride concentration, electrode rotation and potential has been characterized by using the current-time senes and power spectra Examples of quaslpenodiclty and chaos are gwen Key worcis iron electrodlssolutlon, chlonde-sulphate acldlc solutions, penodlc, quasiperiodic, chaotic current oscillations