Coating thickness testing standard

Coating thickness testing standard
The various properties of the coating must be based on the thickness of the coating as a parameter, and many coatings must have the same thickness to be comparable. The coating thickness test stipulates that the minimum thickness of a layer of colored coating is not less than 0.0035 inches and the maximum is not more than 0.006 inches. The maximum thickness of the two-layer coating should not exceed 0.012 inches. When coating thickness detection is not required for the design, the allowable deviation of the total thickness of the coating dry paint film is generally -25 microns. The coating thickness tester helps to control the fine coating thickness measurement to meet the specifications when there are design requirements. Coating thickness gauge can be used to test the coating thickness.

Fourth, coating thickness testing requirements
Coating thickness gauges are again called thick film gauges, coating thickness gauges and paint film thickness gauges. The fine detection of coating thickness is helpful to confirm the best life of the coating and to understand the relationship between coating thickness and roughness. Therefore, standardizing coating thickness detection requirements has both practical and theoretical significance.

It is necessary to pay attention to the metal characteristics of the substrate when testing the coating thickness, and it is required to choose the film thickness meter to be as similar or consistent as possible with the metal magnetic properties and roughness of the test piece substrate. In addition, it is necessary to check whether the thickness of the base metal exceeds the critical value of the coating thickness measuring instrument, and pay attention to the edge effect, surface cleanliness, curvature, reading times, magnetic field and probe orientation during the test.