Abstract
An investigation was carried out to characterize the dissolution behavior of stabilized and unstabilized CrO2 particles in water, used in magnetic recording. Special attention was paid to the measurement of Cr(VI) concentration in the contact solution and to the elucidation of the effects of the stabilizing treatment by x-ray photoelectron spectroscopy (XPS). The experimental results indicate that both stabilized and unstabilized CrO2 particles predominantly release hexavalent chromium when in contact with water. The solubility of freshly stabilized CrO2 is considerably smaller than that of unstabilized CrO2, but the difference in solubility diminishes with aged particles. The XPS study indicated that stabilization of CrO2 particles with a bisulfite solution results in the formation of Cr2O3 or a Cr2O3-like product on the particle. However, it appears that Cr(III) oxide coating does not uniformly form on all particles.
Original language | English (US) |
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Pages (from-to) | 255-261 |
Number of pages | 7 |
Journal | Colloid & Polymer Science |
Volume | 267 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1989 |
Keywords
- Chromium dioxide
- chromium (VI)problem
- magnetic media
- solubility
- stabilized and unstabilized
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Colloid and Surface Chemistry
- Materials Chemistry