X-ray fluorescence thickness measurement is a fast, high-precision non-destructive thickness measurement method. The working principle is to use the x-ray tube or radioactive isotope to release x-rays, excite the characteristic x-rays of the coating or the base metal material, and measure the thickness of the tested coating by measuring the final intensity of the x-rays after the coating is attenuated.
This method can measure the thickness of various metal coatings below 15µm on any metal or non-metallic substrate. It can be used for extremely small samples and extremely thin (a few percent of µm) coatings and samples with extremely complex shapes. This method can also be used to simultaneously measure the thickness of the multi-layer coating on the surface of the substrate, and can also measure the composition of the alloy coating while measuring the thickness of the binary alloy (such as pb_sn alloy and other coatings) , The thickness measurement accuracy of x-ray light method is low in the following cases. (Related Instruments: Thickness Gauge)
(1) When there are coating metal components in the substrate or base metal components in the coating (such as measuring nickel-iron alloy, zinc-iron alloy, etc. coatings on steel substrates)
(2) When there are more than two layers of coating on the substrate
(3) When the chemical composition of the coating to be tested is very different from that of the calibration standard sample, etc., therefore, when the above situation is encountered, it is necessary to correct the measured thickness value. X-ray photometry The operation method of thickness can be carried out according to the operation instructions of the X-ray Thickness Gauge. During the operation, attention should also be paid to the damage of X-rays to the human body, and certain protective measures should be taken.
