The experimental investigation of coating's thickness measurement based on x-fluorescence

The control of coating's thickness is very important. If coating's thickness is not up to the standard, it will have a serious effect on the performance of the products. The test platform of coating's thickness measurement is built in the laboratory, Cu, Fe was used as the test sample, oil paint was used as coating in the experiment. The working curves are established after calibration using standard samples, taking advantage of the exponent attenuation law I=I₀ e^-μx, when ray is traversing matter; measuring coating's thickness on the base of Cu and Fe, under a condition that coating's thickness is from 0.01 g/cm² to 0.06 g/cm², the correlation coefficient is 0.992 and 0.995 respectively, indicate that the measuring method is feasible. (authors)