Anion impurities in anodic oxide films on zirconium

✍ Scribed by G.T. Rogers; P.H.G. Draper; S.S. Wood

• Publisher: Elsevier Science
• Year: 1968
• Tongue: English
• Weight: 832 KB
• Volume: 13
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(68)80025-8

✦ Synopsis

The carbon, sulphur and boron contents of anodic ZrG, films formed in 0.1 M sodium carbonate, 0.1 M sulphuric acid and saturated ammonium borate solutions respectively have been determined. These impurity elements are distributed uniformily on a 2-3 ,em scale in the plane of the film. Over-all impurity contents are determined by the ionic formation cd. The variation of content with cd is different for each anion. Carbon and sulphur are not distributed uniformly in depth but concentrate towards the oxide/solution interface. Sulphur contents are an order of magnitude greater than those of tantalum and tungsten films formed under similar conditions. Carbon sulphur and boron effect the ionic conductivity of the film similarly. effective in increasing formation current efficiency;