Coating Thickness Gauge Categories
Coating thickness gauge generally has the following five types according to the measurement principle:
1. Eddy current thickness measurement method: suitable for measuring the thickness of non-conductive layers on conductive metals. This method is less accurate than magnetic thickness measurement method
2. Magnetic thickness measurement method: It is suitable for measuring the thickness of the non-magnetic layer on the magnetic material. The magnetic material is generally: steel\iron\silver\nickel. This method has high measurement accuracy
3. Ultrasonic thickness measurement method: At present, there is no such method in China to measure the thickness of the coating. Some foreign manufacturers have such instruments, which are suitable for the measurement of the thickness of multi-layer coatings or the occasions where the above two methods cannot be measured. But it is generally expensive and the measurement accuracy is not high.
4. Radiation thickness measurement method: This kind of instrument is very expensive (generally above 100,000 RMB), and is suitable for some special occasions. The most commonly used methods in China are the first and second methods.
5. Electrolytic thickness measurement method: This method is different from the above three methods. It does not belong to non-destructive testing and needs to destroy the coating. The general accuracy is not high. It is more troublesome to measure than other types
How to choose a coating thickness gauge and its principle
With the continuous development of the metal surface pretreatment industry, especially the global emphasis on green environmental protection. Nowadays, the coating process of the automobile and auto parts industry has higher technical requirements, as well as higher requirements for process inspection. At the same time, it is playing a positive role in energy saving, emission reduction and environmental protection. Portable Coating Thickness Gauge is an ultra-small measuring instrument, which can measure the thickness of the non-magnetic coating on the magnetic metal substrate quickly, without damage and precisely.
Ferrous/non-ferrous coating thickness gauges use magnetic sensors to measure non-ferromagnetic coatings and coatings on ferromagnetic metal substrates such as steel and iron, such as: paint, powder, plastic, rubber, synthetic materials, phosphating layer , chromium, zinc, lead, aluminum, tin, cadmium, porcelain, enamel, oxide layer, etc. Use eddy current sensors to measure enamel, rubber, paint, plastic layers, etc. on copper, aluminum, zinc, tin, etc. substrates. Widely used in manufacturing, metal processing, chemical industry, commodity inspection and other testing fields.
