Polarization curves of tin were determined potentiodynamically in deaerated borate buffer at pH 8.5. Mossbauer studies were carried out at liquid nitrogen temperature by transmission using foils of aluminum on which a thin layer of tin enriched in 119Sn was electrodeposited. The predominant tin species in the passive film was Sn+4. The thickness of the passive film was a function of the applied potential and ranged from 0.8 to 2.5 nm. The rate of tin dissolution in the borate buffer was insignificant even in the transpassive range. The surface product formed on tin after exposure to air for more than 30 days could not be removed cathodically in the borate buffer. In situ emission Mossbauer studies using 119mSn were largely unsuccessful because of the low specific activity of the available isotope.
- Mössbauer spectroscopy
- tin oxide
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry