Stability of chromium dioxide particles in aqueous media

I. Ali, S. Raghavan, M. Pritzker

Research output: Contribution to journalArticle

3 Scopus citations

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 languageEnglish (US)
Pages (from-to)255-261
Number of pages7
JournalColloid & Polymer Science
Volume267
Issue number3
DOIs
StatePublished - Mar 1 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

Fingerprint Dive into the research topics of 'Stability of chromium dioxide particles in aqueous media'. Together they form a unique fingerprint.

  • Cite this