Abstract
The anodic dissolution of tungsten was studied in solutions and solutions at 25°C. Faradaic efficiency studies in basic solutions showed the metal to be oxidized to the +6 state. In acid solutions, a thick protective film of yellow was formed. Polarization curves possessed linear Tafel regions at potentials slightly more positive than the rest potentials. An anodic dissolution mechanism is proposed which involves a surface film of that is further oxidized to and dissolves by hydrolyzation.
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