6533b85cfe1ef96bd12bc7cd
RESEARCH PRODUCT
A tensiostatic study of the anodic behaviour of tungsten in acid solutions
A. Di PaolaF. Di QuartoG. Serravallesubject
Materials scienceAqueous solutionGas evolution reactionInorganic chemistryGeneral EngineeringOxidechemistry.chemical_elementSulfuric acidHydrochloric acidTungstenchemistry.chemical_compoundchemistryElectrodePerchloric aciddescription
Abstract Tensiostatic anodization of tungsten has been studied in 1 N solutions of H 2 SO 4 , HClO 42 , HNH 2 SO 3 and HCl at 25 °C. For several voltage values, the curves of current vs . time and open-circuit voltage vs . time have been obtained. All results indicate that the oxide films produced during the polarization are slowly dissolved in the acid solutions. The HCl, and to a lesser extent the HNH 2 SO 3 solutions, show a more aggressive behaviour. For values of the applied voltage above about 50 V, gas evolution begins. In the case of HCl solutions, the gas is Cl 2 and the electrode is rapidly corroded.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1975-10-01 | Journal of the Less Common Metals |