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Stability of zirconium passive films in nitric and sulphuric acid solutions

✍ Scribed by Seham M. Abd El-Motaal; Nadia H. Hilal; Waheed A. Badawy

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
583 KB
Volume
39
Category
Article
ISSN
0013-4686

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✦ Synopsis

Anodic oxide films were formed galvanostatically on zirconium in nitric and sulphuric acid solutions. The stability of the formed oxide films were investigated. The effects of formation voltage, formation current density and frequency on the dissolution behaviour of the formed oxide layers in both media were studied. Open-circuit potential and impedance measurements were used. The results reveal that the anodic oxide films formed in nitric acid solutions are more stable than those formed in sulphuric acid solutions under the same conditions. The stability of the anodic oxide films on zirconium was found to depend on the formation medium rather than the dissolving solution.

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