What are the measurement methods of the paint coating thickness gauge?
The paint 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 (eg enamel, rubber, paint, plastic, etc.) on a magnetic metal substrate (eg copper, aluminum, zinc, tin, etc.).
Magnetic thickness measurement
It is suitable for measuring the thickness of the non-magnetic layer on the magnetic material. Magnetic materials are generally: steel\iron\silver\nickel. This method has high measurement accuracy.
Eddy Current Thickness Measurement
The paint coating thickness gauge is suitable for measuring the thickness of the non-conductive layer on the conductive metal. 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 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 the general price is expensive and the measurement accuracy is low. 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, and it is more troublesome to measure than other methods.
Radiographic Pachymetry
This kind of instrument is very expensive (generally above 100,000 RMB) and is suitable for some special occasions.
