X-ray or gamma ray systems or devices – Specific application – Fluorescence
Patent
1991-07-08
1993-02-16
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Fluorescence
378 46, 378 89, G01B 1502
Patent
active
051877279
ABSTRACT:
A method and apparatus for measuring, for example, the iron content in zinc layers and/or the thickness of a layer of zinc in galvanized steel. In order to measure the percentage of iron content in a zinc layer, the apparatus has a source of X-radiation which is arranged at a specified angle to the plane of the material to be measured and at least two detectors equipped with selective sensitivity, one of which is arranged at a second angle and the other at a third angle. One detector measures the iron content and the other detector measures essentially the amount of zinc per unit surface of the coating. From these two measurements, the amount of iron as a percentage of the zinc layer can be calculated.
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patent: 3848125 (1974-11-01), Utt et al.
patent: 4748647 (1988-05-01), Kaiser et al.
patent: 4764945 (1988-08-01), Tadahiro
patent: 4959848 (1990-09-01), Parobek
Prospekt der Fa. Siemens "Systeme fur die energiedispersive Analyse," 1974 J. Seda et al., Verminderung des statistischen Fehlers bei Messungen von Auflageschichten mittels Rontgenfluoreszenzstrahlung.
Mayerhofer Matthias
Ortner Hanns-Werner
Vogler Friedrich
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