Reorganization of the surface of an alloy after selective anodic dissolution

✍ Scribed by A.V. Vvedenskii; I.K. Marshakov

• Book ID: 103066695
• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 556 KB
• Volume: 36
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(91)85292-f

✦ Synopsis

An alloy's surface layer (enriched in an electrochemically positive component), which appears in the process of selective anodic dissolution, is unstable and it is liable to reorganization after polarization. Being conditioned thermodynamically, the reorganization manifests itself in a gradual levelling of the activity of the components both on the surface and in the volume of the alloy. A series of non-stationary electrochemical techniques, confirming the reorganization of the surface layer of Ag-Au alloys with the predominance of silver, has been worked out. It is shown that the kinetics of the initial stage of the reorganization is determined by heterogeneous stages of the anodic decrystallization of silver and by the interdiffusion of the alloy's components.