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Testing Method For Stainless Steel Screws
1. Measuring instrument method: the use of a vernier caliper, micrometer, plug gauge, etc.;
2. Magnetic method: magnetic method is used to accurately measure the thickness of the coating layer on the surface, which is a non-destructive and accurate measurement of the coating layer on the non-magnetic surface of the magnetic substrate with magnetic coating thickness gauge.
3. Optical microscopy: the corroded standard parts are enlarged on the metallographic microscope with micrometer eyepiece to accurately measure the thickness of the coating on the cross section;
4. Time flow method: can make the coating melt water solution flow in the coating on part of the surface layer, according to the end of part of the coating melt time necessary to measure the thickness of the coating.