Influence of crystallographic properties on antimony electrode potential—III. Oriented monocrystalline material

✍ Scribed by G. Edwall

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 948 KB
• Volume: 24
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(79)87041-3

✦ Synopsis

Crystallographically oriented monocryslalline antimony electrodes representing close-packed crystallographic planes have been studied in HCI-SbOCI solutions at pH 1 .9. The electrode potentials were found to stabilize in less than 1 min . They then remained stable at that level to within 1 mV for more than 100 h of continuous use unless a surface defect existed or developed . The potentials of the different electrodes were reproducible to within 1mV and repeatable to within 02 mV. The typical short-term potential variations were 0.1 mV for long periods of time and no stirring effect was noted during the first 100h of use . All electrodes responded reproducibly to oxygen and nitrogen bubbling and to temperature changes in the solution . The maximum long-term potential drift encountered after the first 100 h period of relative potential stability was -0.8 mV/day during a total of 800 h use . Sem studies of the surfaces of used electrodes showed only minor corrosion and no signs of a covering surface (oxide) structure . The surfaces also appeared less corroded for electrodes with more close-packed surfaces . These electrodes also possessed the most negative potentials.