Dissolution of the oxide film on zirconium

✍ Scribed by R.D. Misch

• Publisher: Elsevier Science
• Year: 1957
• Weight: 275 KB
• Volume: 5
• Category: Article
• ISSN: 0001-6160
• DOI: 10.1016/0001-6160(57)90025-1

✦ Synopsis

The bars were then anodized in 1% KOH solution at room temperature to produce "stepgages." This was done by dividing each bar into l-cm sections on which successively increasing oxide film thicknesses were produced by anodizing from 0 to 150 V in 10-V increments. Each section was held at voltage one half-hour. A platinum anode was used.

Polling and Charlesby t3) have shown that the anodic films produced at different constant currents had thicknesses corresponding to 30 A/V. In the present study the film thicknesses determined by weighing foil corresponded to 27 A/V. There is no conflict in these values, since prolonged anodizing will yield slightly thicker films. The latter conversion factor is used in this report.

The step-gages were next heated in a platinumtube furnace contained in an 18 in. bell jar. A vacuum of l.0W6 mm Hg was maintained while at temperature. After heating, the specimens were removed and compared with standards.