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  • 1
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The intention of this work is the full characterisation of morphology, composition and structure of so-called intermediate layers in continuously galvanised steel sheets. These layers grow as a reaction product of the sheet with the liquid zinc which contains a few tenth % of mass fraction aluminium. Conventional methods of surface analysis combined with ion sputtering fail to resolve the layers because of extreme surface roughness of the zinc coating induced by the sputter process. Better access to the intermediate zones can be attained after carefully removing the zinc coating by etching or chemical polishing without attacking the layers. The uncovered layers can be analysed by EPMA, AES-line scanning and SEM. Especially an EPMA-thin film analysis technique turns out to be most suitable to analyse quantitatively the composition and stoichiometry of phases in the layer(s). Also layer thicknesses can be determined in terms of mass coverage. The results of these analyses are in good agreement with literature data from metallurgical and constitutional investigations. The applied techniques can be recommended for quality assurance and failure analysis in industrial production of continuously hot-dip zinc coated steel sheets.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Tautomeric Properties, and Hydrogen Bonds of 2-Heteroarylamino-thiazoles2-Heteroarylamino-thiazoles have been prepared by the method of HANTZSCH from heteroaryl-substituted thioureas. UV and IR spectra indicate the amino form for these compounds. In solid state, they are associated through N—H…N bonds, the nitrogen atom of the thiazole ring serving as an acceptor of protons.
    Notes: 2-Heteroarylamino-thiazole lassen sich nach der Methode von HANTZSCH aus heteroaromatisch substituierten Thioharnstoffen darstellen. Die UV- und IR-spektroskopische Untersuchung zeigt, daß diese Verbindungen in der Aminoform vorliegen. Sie sind im festen Zustand über N—H…N-Brücken assoziiert, wobei das Ringstickstoffatom des Thiazols als Protonenakzeptor fungiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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