Abstract
Hopeite-type phosphate coatings in which zinc is replaced by other metals like nickel, manganese and magnesium are of great interest as conversion coatings on galvanized steel in the automotive and appliance industries. The analytical characterization of such coatings produced in special processes is not possible by XRD because the different types of hopeite are isomorphic. In this paper it is shown that the kind of metal substitution is responsible for certain specific features in the infrared reflection spectra. Furthermore the structural changes caused by dehydration due to heating of the coatings were studied and differences in the thermal stability of the different coatings thus could be observed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
W. A. Roland, K.-H. Gottwald,Metalloberfläche 1988,42, 301.
M. Friedrich, S. Haussühl, R. Seidel, in preparation.
K. Molt, M. Egelkraut, K.-H. Gottwald,Mikrochim. Acta 1988,II, 63.
H. Bubert, H. Pulm, H. Puderbach,Microchim. Acta 1987,I, 355.
E. A. Nikonenko, I. I. Olikov, I. N. Marenkova, L. N. Margolin, L. A. Reznikova,Russ. J. Inorg. Chem. 1985,30, 13.
C. J. Clark, M. B. McBride,J. Solid State Chem. 1984,55, 106.
M. Pohl,Ph.D. Thesis, Analytik von Phosphatschichten auf Stahl mit Hilfe der Infrarot-Spektroskopie, Universität-GH Duisburg, Germany, 1992.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Molt, K., Pohl, M., Seidel, R. et al. IR-Spectroscopic investigations on phosphated galvanized steel. Mikrochim Acta 116, 101–109 (1994). https://doi.org/10.1007/BF01244068
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01244068