Ceramics-Silikáty 58, (1) 39 - 45 (2014) |
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EVALUATION OF CORROSION OF ENGINEERING CERAMICS
BY ATOMIC EMISSION SPECTROMETRY
IN INDUCTIVELY COUPLED PLASMA
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Galusková Dagmar 1, Galusek Dušan 1, Šajgalík Pavol 2
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1 Vitrum Laugaricio - Joint Glass Centre of the Institute of Inorganic Chemistry, Slovak Academy of Sciences,
Alexander Dubček University of Trenčín, and Faculty of Chemical and Food Technology,
Slovak Technical University, Študentská 2, 911 50 Trenčín, Slovak Republic
2 Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, Slovak Republic
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Keywords: ICP OES, Matrix effect, Ceramics, Corrosion, Alumina, Silicon nitride
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An analytical method has been developed and verified, facilitating chemical analysis of saline aqueous solutions from
corrosion tests of two types of engineering ceramics, i.e. polycrystalline alumina, and silicon nitride. The method is capable
of providing complementary information related to mechanisms of corrosion and kinetics of dissolution of the two main
components of the ceramics, i.e. Al in α-Al2O3, and Si in Si3N4. A radially viewed inductively coupled plasma atomic emission
spectroscopy was used, and the operating conditions for the analysis were optimised. The method was validated. Internal
standardisation, matrix matching, standard addition technique and direct measurement without matrix correction were
applied, and the results were critically discussed. The technique of internal standard was shown to be the most sensitive. The
method exhibited satisfactory precision (relative standard deviation up to 5 %), analytical recoveries from 95 to 100 %, and
acceptable limits of detection based on 3σ criterion of 0.095 mg l-1 for Al (measured at 308.215 nm) and 0.099 mg∙l-1 for Si
(at 251.611 nm). |
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