There are two different methods for measuring dry film thickness in two methods for dry film thickness measurement, which are classified into destructive testing and non-destructive testing. Non-destructive testing tools mainly include magnetic tensile thickness gauges and electronic thickness gauges. Rheological Additives,Rheology Modifiers Thickeners,Organoclay Rheological Additive,Water Based Rheological Additives CHANGXING GUANGDA NEW MATERIALS CO.,LTD. , https://www.gdbentonite.com
The magnetic stirrer tensile thickness gauge is the easiest to use, because the shape resembles a fragrant color wheel banana, usually called a banana type thickness gauge. The error of the magnetic thickness gauge is allowed to be within = > ; Note the following when using a magnetic thickness gauge: First, because the exposed magnet will attract nearby scattered iron particles and steel shots or steel grit; secondly, if the magnetic thickness gauge is used on a sticky paint film, the reading indicates The thickness may be lower than the actual film thickness; third, the vibration of the test area causes the magnet to detach from the surface before leaving the surface normally, resulting in a high reading. In general, it is best not to measure the dry film thickness where the edge, hole or internal angle is less than 2>::B about 7)&D.
The electronic thickness gauge has single probe and double probe, and the error is within =?; if the measurement range is adjusted, the error can be controlled within = 7; The electronic thickness gauge measures the film thickness by the magnetic flux between the probe and the substrate. It uses batteries and needs to be calibrated frequently. The thickness gauge reading can be accurate to 31 7 !:. Currently used E6F ":$$$$$$$$*$$$$$$$$%G>H electronic thickness gauge, using menu control, through the data line in the computer for film analysis. Exchange different The probe can be applied to a variety of metal or non-metal substrates, and is suitable for flat and curved surfaces. The standard for dry film thickness measurement (thickness gauge can be used) is IJK 2L3L, IJK74LG3 and JJ in the United States. 'M N 'O2. When performing dry film thickness measurement, observe the measurement principle specified in the coating specification: L3 N 23, 43 N 73 principle or similar measurement principle. L3 N 23 principle means: L3; The measured value shall not be lower than the specified dry film thickness, and the remaining 23; the measured value shall not be lower than the specified film thickness L3; for example: the specified dry film thickness is ?33 !:, then the measured value of L3; shall reach ?33 !: Above, the remaining roughness meter 23; the measured value shall not be lower than the specified film thickness? 33!: L3 of the grinder; that is, 2G3 !:.
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