Molt, K.; Behmer, D.; Pohl, M.:

Different techniques for determining the coating weight of phosphate layers on galvanized steel by FTIR-spectrometry.

In: Fresenius' journal of analytical chemistry (Fresenius J.Anal.Chem.), Jg. 358 (1997) ; Nr. 1-2, S. 36-41
ISSN: 0937-0633
Zeitschriftenaufsatz / Fach: Chemie
The detn. of the wt. per unit area (\"coating wt.\") of phosphate layers on galvanized steel by means of FT-IR-spectrometry has been performed by three different techniques: (i) principal component regression (PCR) of absorption data, (ii) utilizing the thickness dependent wavenumber shift of a band due to a special optical surface effect obsd. with parallel-polarized radiation and (iii) of an interference band obsd. with perpendicular-polarized radiation.