Breakdown phenomena during the growth of anodic oxide films on zirconium metal Influence of experimental parameters on electrical and mechanical breakdown

Journal Article · Sat Dec 01 00:00:00 EST 1984 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2115439· OSTI ID:5728648

Di Quarto, F; Piazza, S; Sunseri, C

Different aspects of the breakdown phenomena observed during the growth of anodic films on zirconium metal in aqueous solutions have been investigated. Two different mechanisms of breakdown are suggested as a result of the experimental observations. A mechanical breakdown, which is dependent upon the logarithm of the anodizing current density, has been observed in carbonate and sulfate solutions at low concentrations of salt or aci and/or low anodizing current densities. The appearance of small fissures in the ZrO/sub 2/ films is related to this type o breakdown. An electrical breakdown was observed in sulfamic acid solutions as well as in sulfate and carbonate solutions as high salt or acid concentrations and/or high current densities. In the case of electrical breakdown, the first spark voltage showed a significant dependence upon the value of current density only in carbonate and sulfate anion containing solutions. A possible explanation for this dependence is suggested in agreement with Christov's model, taking into account also the incorporation of anions into the films. The different influences of the electrolytic solutions upon both types of breakdown are presented and discussed.

• Research Organization: Istituto di Ingegneria Chimica, Universita di Palermo, 90128 Palermo
• OSTI ID: 5728648
• Journal Information: J. Electrochem. Soc.; (United States), Vol. 131:12
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTRIC BATTERIES
ELECTROLYTES
FABRICATION
ZIRCONIUM
ANODIZATION
CHEMICAL REACTION KINETICS
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
MECHANICAL PROPERTIES
ANIONS
ANODES
AQUEOUS SOLUTIONS
CARBONATES
CRYSTAL GROWTH
CURRENT DENSITY
MATHEMATICAL MODELS
SULFATES
THIN FILMS
ZIRCONIUM OXIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL COATING
CHEMISTRY
CORROSION PROTECTION
DEPOSITION
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTROCHEMICAL COATING
ELECTRODES
ELECTROLYSIS
ELEMENTS
FILMS
IONS
KINETICS
LYSIS
METALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
SOLUTIONS
SULFUR COMPOUNDS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries
360103 - Metals & Alloys- Mechanical Properties
360104 - Metals & Alloys- Physical Properties
400400 - Electrochemistry