Stability of chromium dioxide particles in aqueous media

I. Ali, Srini Raghavan, M. Pritzker

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 1989

Fingerprint

Photoelectron spectroscopy
dioxides
chromium
Chromium
Solubility
X rays
Magnetic recording
Water
Contacts (fluid mechanics)
Oxides
Dissolution
Stabilization
Coatings
x ray spectroscopy
solubility
photoelectron spectroscopy
magnetic recording
water
chromium hexavalent ion
chromium dioxide

Keywords

  • chromium (VI)problem
  • Chromium dioxide
  • magnetic media
  • solubility
  • stabilized and unstabilized

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Stability of chromium dioxide particles in aqueous media. / Ali, I.; Raghavan, Srini; Pritzker, M.

In: Colloid & Polymer Science, Vol. 267, No. 3, 03.1989, p. 255-261.

Research output: Contribution to journalArticle

Ali, I. ; Raghavan, Srini ; Pritzker, M. / Stability of chromium dioxide particles in aqueous media. In: Colloid & Polymer Science. 1989 ; Vol. 267, No. 3. pp. 255-261.
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