Choosing a coating thickness gauge and understanding its operation
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.
Here we introduce the German EPK products:
Germany EPK (Elektrophysik) company has been committed to the development and production of various precision measuring instruments for the surface treatment industry. As a pioneer in the field of non-destructive coating thickness measurement, EPK, together with various standardization organizations and research institutes, has successfully promoted the worldwide standardization process of coating thickness measurement. A large number of technologies and achievements show that EPK is a leader in this production field. EPK's coating thickness gauge is small and practical, fast and safe to measure; the top of the probe is made of very wear-resistant hard material; the F-type probe is used for non-magnetic coatings on steel, such as paint, plastic, enamel, chrome, zinc etc.; N-type probe is used for all insulating layers on non-ferrous metals (such as copper, aluminum, austenitic stainless steel), such as anodized film, paint, coating, etc.; FN-type probe is a newly developed dual-purpose probe that can be used in Automatic conversion of measurements on magnetic and non-magnetic substrates.
Pachymetry category:
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 and eddy current thickness measurement method
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
sonic 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 Not high. 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. Generally, the accuracy is not high. It is more troublesome to measure than other radiation thickness measurement methods.
