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RESEARCH PRODUCT
Anodic oxide films on tungsten—I. The influence of anodizing parameters on charging curves and film composition
Carmelo SunseriF. Di QuartoA. Di Paolasubject
Materials scienceAnodizingPrecipitation (chemistry)General Chemical EngineeringInorganic chemistryOxidechemistry.chemical_elementGeneral ChemistryTungstenCorrosionAmorphous solidchemistry.chemical_compoundchemistryElectrodeGeneral Materials ScienceDissolutiondescription
Abstract The formation of anodic films on tungsten has been studied in 1N solutions of H 2 PO 4 , H 2 SO 4 , HNO 3 , HClO 4 and HCl at different temperatures. The shape of the anodic charging curves depends on the electrolyte composition and on the temperature. The chemical composition of the films is strongly influenced by the working temperature. The first step of the anodization is the formation of a barrier film of amorphous WO 3 . The thickening of the oxide layer occurs on account of the WO 3 dissolution and following precipitation of sparingly soluble oxides on the electrode surface.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-01-01 | Corrosion Science |