How to choose a coating thickness gauge and its principle introduction
With the continuous development of the metal surface pretreatment industry, especially the high emphasis on green environmental protection on a global scale. Nowadays, the painting process in the automotive and automotive parts industry has higher technical requirements, and there are also higher requirements for process testing. At the same time, it is playing a positive role in energy conservation, emission reduction, and environmental protection. Portable coating thickness gauge is a subminiature measuring instrument that can quickly, non-destructive, and accurately measure the thickness of non magnetic coatings on magnetic metal substrates.
Iron based/non iron based 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. Measure enamel, rubber, paint, plastic layers, etc. on substrates such as copper, aluminum, zinc, and tin using eddy current sensors. Widely used in testing fields such as manufacturing, metal processing, chemical industry, and commodity inspection.
Thickness measurement method category:
Suitable for measuring the thickness of non magnetic layers on magnetic conductive materials. Magnetic conductive materials are generally: steel, iron, silver, and nickel. This method has high measurement accuracy and eddy current thickness measurement method
Suitable for measuring the thickness of non-conductive layers on conductive metals. This method has lower accuracy than magnetic thickness measurement and ultrasonic thickness measurement
At present, there is no such method for measuring coating thickness in China. Some foreign manufacturers have such instruments that are suitable for measuring multi-layer coating thickness or in situations where neither of the above two methods can be used. However, they are generally expensive and the measurement accuracy is not high. Electrolytic thickness measurement method
This method is different from the above three methods and does not belong to non-destructive testing. It requires the destruction of the coating layer. The general accuracy is also not high, and it is more troublesome to measure compared to other methods such as radiation thickness measurement
This type of instrument is very expensive (usually above 100000 RMB) and suitable for some special occasions
