METHOD AND APPARATUS FOR QUANTITATIVELY MEASURING METAL PHASE BY X-RAY DIFFRACTOMETRY AND METHOD OF PRODUCING GALVANIZED STEEL SHEET USING THE METHOD AND APPARATUS

摘要

A quantitative measuring method and apparatus of a metal phase contained in aplated layer using an X-ray diffraction method, and a method for making aplated steel sheet using them. The measuring precision can be improved to findan application to an on-line measurement by increasing the intensity of an X-ray diffracted from the metal phase contained in the plated layer. Thediffracted X-ray from the metal phase is measured either over a predeterminedrange or at a plurality of positions on the Debye ring to increase theintensity of the diffracted X-ray thereby to improve the measurementprecision. Moreover, the X-ray beam emitted from an X-ray source is compressedor made monochromatic or parallel to increase the intensity of the diffractedX-ray thereby to improve the measurement precision. The method and apparatusare utilized especially for measuring the alloying degree of a molten zincplating.