Chemical Stability of Chromium Carbide and Chromium Nitride Powders Compared with Chromium Metal in Synthetic Biological Solutions
Joint Authors
Herting, Gunilla
Odnevall Wallinder, Inger
Jiang, Tao
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-26
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Chromium carbide (Cr-C) and chromium nitride (Cr-N) powders were compared with a chromium metal powder (Cr-metal) to evaluate their chemical stability in solution.
All three powders were exposed in five different synthetic biological solutions of varying pH and chemical composition simulating selected human exposure conditions.
Characterisation of the powders, using GI-XRD, revealed that the predominant bulk crystalline phases were Cr7C3 and Cr2N for Cr-C and Cr-N respectively.
The outermost surface of Cr-C, determined by XPS, contained Cr7C3 and Cr2O3 and the corresponding measurement on Cr-N revealed Cr2N and CrN apart from Cr2O3.
The presence of Cr2O3 was verified by XPS investigations of the Cr-metal powder.
The mean particle size was similar for Cr-metal and Cr-N but slightly smaller for Cr-C.
All three powders were poorly soluble and released very low amounts of chromium (<0.00015 μg Cr/μg loaded particles) independent on test solution.
Slightly higher chromium concentrations were determined in the more acidic media (pH 1.7 and 4.5) compared with the near-neutral solutions (pH 7.2 and 7.4).
Cr-C released the lowest amount of Cr despite having the largest surface area a feature attributed to the strong covalent bonds within the matrix.
American Psychological Association (APA)
Jiang, Tao& Odnevall Wallinder, Inger& Herting, Gunilla. 2012. Chemical Stability of Chromium Carbide and Chromium Nitride Powders Compared with Chromium Metal in Synthetic Biological Solutions. ISRN Corrosion،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-467433
Modern Language Association (MLA)
Jiang, Tao…[et al.]. Chemical Stability of Chromium Carbide and Chromium Nitride Powders Compared with Chromium Metal in Synthetic Biological Solutions. ISRN Corrosion No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-467433
American Medical Association (AMA)
Jiang, Tao& Odnevall Wallinder, Inger& Herting, Gunilla. Chemical Stability of Chromium Carbide and Chromium Nitride Powders Compared with Chromium Metal in Synthetic Biological Solutions. ISRN Corrosion. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-467433
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-467433