The conditions for incorporation of electrolyte ions into anodic oxides

✍ Scribed by J.S. Llewelyn Leach; B.R. Pearson

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 688 KB
• Volume: 29
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(84)87189-3

✦ Synopsis

model is developed to account for the variation in pick-up, in the oxide, of anions from the solution during anodic oxidation. According lo this model, during constant current anodizing, the pick-up depends upon the [anion]/[OH -1 ratio at the electrode surface. This in turn is acritical function not only of the pH of the bulk electrolyte but also of the impressed current density which can alter the local concentration of ions, particularly at the electrode-electrolyte interface. The model explains the abrupt change of pick-up observed extxrimentally when in certain ranges, the DH of the bulk solution or the impressed current density are changed.