System and method for measuring the thickness of a zinc layer on steel and measuring the iron content of a zinc layer

摘要

The invention discloses a determination device (50) which is designed to determine the thickness of a zinc layer (18a) on an iron layer (18b) of a test object (18) and the iron content (18c) in the zinc layer (18a) on the iron layer (18b). to determine the test object (18) with an X-ray source (2) which emits X-rays (14) onto the test object (18) with the zinc layer (18a) on the iron layer (18b); a first fluorescence detection device (4, 4 ') which determines a first fluorescence radiation due to iron (18b) in the test object (18), which is scattered by the test object (18) at a first angular segment; a Compton detection device (6, 6 ') which determines a Compton scatter due to iron (18b) in the test object (18), which is scattered by the test object (18) at a first angle segment; a second fluorescence detection device (52, 52 ') which determines a second fluorescence radiation due to iron (18b) in the test object (18) which is scattered by the test object (18) at a second angle segment; a third fluorescence detection device (52, 52 ') which determines a third fluorescence radiation due to zinc (18a) in the test object (18), which is scattered by the test object (18) at a second angle segment; and a first evaluation device (24a) which is designed to determine the thickness of the zinc layer (18a) on the iron layer (18b) of the test object (18) from the first fluorescent radiation and the Compton scattering; and a second evaluation device (24b) which is designed to determine the iron content (18c) in the zinc layer (18a) from the first fluorescent radiation, the second fluorescent radiation and the third fluorescent radiation.