Methods to determine light elements content of steel and alloys
AssigneesPetroleo Brasileiro S.A., Universidade Federal Da Bahia
InventorsMartha Teresa Pantoja De Oliveira Castro, Cristina Maria Assis Lopes Tavarez da Mata Hermida Quintella, Joao Nazareth Lafayette De Mello Mac-Culloch
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Abstract
The present invention refers to the process of determination of light elements, i.e., molar mass lower than 23, within inorganic materials, by means of spectra analysis between 5 keV and 22 keV, obtained from these materials when exposed to X radiation. Particularly, the invention refers to the direct determination of carbon content in steel and alloys. According to the invention process, the inorganic materials are exposed to X radiation and the spectra are organized as a matrix and mathematically processed using chemometric tools properly selected.
Claims7
A method for determining light element content of steel and alloys, the method comprising the steps of:
- irradiating one or more inorganic materials with an X-Ray in a spectral range corresponding to an energy between 5 keV and 22 keV to obtain a spectra;
- and
- identifying one or more elements with molar mass lower than 23 in the one or more inorganic materials through multivariate data analysis of the spectra obtained by irradiating the one or more inorganic materials.
Dependencies are inferred from the claim text.