Application of Coating Thickness Gauge in Electrophoretic Paint Industry
Due to the defects of conventional spray paint, electrophoretic paint gradually replaced the position of conventional spray paint. So what is electrophoretic paint? Electrophoresis is a method of metal coating. Specifically, it refers to immersing a conductive coating object in an electrophoretic paint tank filled with water and having a relatively low concentration as an anode or a cathode. A corresponding cathode or anode is additionally provided in the tank. After direct current is applied to the two poles, a uniform and fine coating film is not deposited on the surface of the coated object. The thickness of this coating film can usually be detected by a coating thickness gauge.
I. Development of the electrophoretic paint industry
The raw materials of the electrophoretic paint are mainly epoxy resin, petroleum resin and mixed resin. With the development of cathodic electrophoretic coatings. This material has gradually ushered in an era of multi-variety, diversity, versatility and colorization. The coatings on the surface of electrophoretic coatings have gradually developed in the direction of film thickness, multi-color, high appearance quality and low pollution.
Although technology is developing, there are still a series of problems with electrophoretic paint films, such as rough surface, shrinkage, pits, pinholes and spots on the paint film. Fortunately, these problems have been solved. The thickness of the electrophoretic paint film is generally measured between 15-25 μm with a coating thickness gauge. The thickness of the electrophoretic paint film for non-leakage parts such as seats is generally between 15-25 μm.
2. Use the coating thickness gauge to measure the thickness of the electrophoretic paint coating
Linshang LS220H coating thickness gaugeuses the principle of magnetic thickness measurement and eddy current thickness measurement. The principle of magnetic thickness measurement refers specifically to measure the thickness of various plating layers (except nickel plating and magnetic metals), coatings, enamels, enamels and other materials on steel substrate. Specifically refers to the principle of magnetic induction. It is the magnitude of the magnetic flux between the side head with the magnet and the magnetically permeable base material. The probe flows into the iron base material through the non-ferromagnetic covering surface. The thicker the cover layer is, the smaller the magnetic flux is. Then the thickness of the coating layer is calculated by processing.
Eddy current thickness measurement is often used to measure the thickness of non-conductive coatings on non-magnetic metal substrates. When the metal moves in a changing magnetic field, the entire metal will generate electromotive force in the metal conductor due to the effect of electromagnetic induction. Due to the resistance of the conductor itself, a current is generated inside the conductor and the eddy current is formed because of the difference in magnetic flux distribution and surface shape. The coating thickness is then calculated by processing.
Linshang LS220H coating thickness gauge is very suitable for measuring the thickness of electrophoretic paint coating. The design of the instrument is simple and it is easy to operate. Just make zero adjustment and press the probe directly on the surface of the measured object to quickly measure the coating thickness on the substrate surface. One measurement takes only 0.5s. This coating thickness gauge uses an advanced digital probe, which can keep the zero position stable for a long time without drift and the repeated measurement data at the same position is stable. It is easy to carry with compact design, making your coating measurement more convenient and quick!
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