How many types of coating thickness gauges are there?
The coating thickness gauge can non-destructively measure the thickness of non-magnetic coatings (such as aluminum, chromium, copper, enamel, rubber, paint, etc.) The thickness of a non-conductive coating (such as enamel, rubber, paint, plastic, etc.) on a metal substrate (such as copper, aluminum, zinc, tin, etc.). The coating thickness gauge has the characteristics of small measurement error, high reliability, good stability, and easy operation. It is an indispensable testing instrument for controlling and ensuring product quality. It is widely used in manufacturing, metal processing, chemical industry, Commodity inspection and other testing fields.
Magnetic thickness measurement
It is suitable for measuring the thickness of the non-magnetic layer on the magnetically conductive material. The magnetically conductive material is generally: steel\iron\silver\nickel. This method has high measurement accuracy
Eddy Current Thickness Measurement
Applicable to the measurement of the thickness of non-conductive layers on conductive metals. This method is less accurate than the magnetic thickness measurement method
ultrasonic thickness measurement
At present, there is no such method in China to measure the coating thickness. Some foreign manufacturers have such instruments, which are suitable for the measurement of multi-layer coating thickness or the occasions where the above two methods cannot be measured. But the general price is expensive and the measurement accuracy Not high either.
electrolytic thickness measurement
This method is different from the above three methods. It does not belong to non-destructive testing and needs to destroy the coating. Generally, the accuracy is not high. It is more troublesome to measure than other types
Radiographic Pachymetry
This kind of instrument is very expensive (generally above 100,000 RMB), and is suitable for some special occasions.
The most common method currently used in China
The first and second methods are the most commonly used in China at present.
