Coating Thickness Gauge Overview
It can non-destructively measure the thickness of non-magnetic coatings (such as aluminum, chromium, copper, enamel, rubber, paint, etc.) on magnetic metal substrates (such as steel, iron, alloys and hard magnetic steel, etc.) and non-magnetic metal substrates (such as copper , aluminum, zinc, tin, etc.) thickness of non-conductive coatings (e.g. enamel, rubber, paint, plastic, 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 to control and ensure product quality. It is widely used in manufacturing, metal processing, chemical industry, Commodity inspection and other testing fields.
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 paints, powders, plastics, rubber, synthetic materials, phosphating layers , chromium, zinc, lead, aluminum, tin, cadmium, porcelain, enamel, oxide layer, etc. Use eddy current sensors to measure enamel, rubber, paint, plastic layers, etc. on substrates such as copper, aluminum, zinc, and tin. Widely used in manufacturing, metal processing industry, chemical industry, commodity inspection and other testing fields. Coating thickness gauges generally have the following five types according to the measurement principle:
Magnetic thickness measurement
It is suitable for the thickness measurement of the non-magnetic layer on the magnetic conductive material. The magnetic conductive material is generally: steel \ iron \ silver \ nickel. This method has high measurement accuracy
Eddy Current Thickness Measurement
It is suitable for the thickness measurement of non-conductive layers on conductive metals. This method has lower accuracy than the magnetic thickness measurement method.
Ultrasonic Thickness Measurement
At present, this method has not been used to measure the thickness of the coating layer in China. Some foreign manufacturers have such instruments, which are suitable for the measurement of the thickness of the multi-layer coating layer or the occasions where the above two methods cannot be measured. However, it is generally expensive \ measurement accuracy Not high either.
Electrolytic Thickness Measurement
This method is different from the above three. It does not belong to non-destructive testing and needs to destroy the coating layer. The general accuracy is not high. It is more troublesome to measure than other types.
radiographic thickness measurement
This kind of instrument is very expensive (generally more than 100,000 RMB) and is suitable for some special occasions.
