| 摘要 |
PURPOSE:To make measurement easy and improve the precision by obtaining a quantity of plating adhesion on a basis of a value obtained by correcting the intensity of diffracted rays, which is detected when X rays are irradiated onto a steel plate to be measured, with a background intensity detected simultaneously with detection of said intensity of diffracted rays. CONSTITUTION:Cr-Kalpha X rays generated in a Cr X ray tube bulb 24 in a spectral diffraction part 20 are converged by a divergent solar slit 22 and are irradiated to a strip steel plate 12. Then, intensities of diffracted rays of alphaFe-phase (200) face subjected to Bragg reflection and the background are detected by a diffracted ray intensity detector 28 and a background intensity detector 32 provided with light receiving solar slits 26 and 30 respectively. An operating device 40 calculates the quantity of zinc adhesion on the steel plate 12 on a basis of the value, which is obtained by subtracting the intensity of the background from the intensity of diffracted rays, and a detected radiation quantity of a preliminarily inputted standard sample. |
