MEASURING METHOD FOR PLATING STUCK QUANTITY AND MG PERCENTAGE CONTENT OF ZN-MG ALLOY-PLATED STEEL PLATE

摘要

PURPOSE: To nondestructively and quickly measure the plating stuck quantity and Mg percentage content of a Zn-Mg alloy-plated steel plate by measuring the K-series fluorescence X-ray intensity of Fe and Zn emitted from substrate steel and a plated layer. ;CONSTITUTION: A Zn-Mg alloy-plated steel plate manufactured in a pilot plant of the continuous deposition plating line is used for a sample. A sample for a fluorescence X-ray analysis is picked from the manufactured sample, the intensity is measured for FeKα and ZnKα rays by a wavelength dispersion type fluorescence X-ray device, and the plating stuck quantity and Mg percentage content are obtained. An Rh tubular bulb is used for measurement under the conditions of the tube voltage 50kV and the tube current 50mA. The plated layer of the sample used for the fluorescence X-ray analysis is dissolved in an HCl solution, the Zn quantity and Mg quantity contained in the plated layer are analyzed by the emission spectral analysis method of the solution, and the plating stuck quantity and Mg percentage content are obtained. The plating stuck quantity and Mg percentage content can be obtained with good accuracy by the fluorescence X-ray analysis method.;COPYRIGHT: (C)1996,JPO