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Coating Thickness Gauge Measurement Considerations
Dec 24, 2018

Coating Thickness Gauge Measurement Considerations


Let's take a look at the following small series, coating thickness gauge measurement considerations


1. Matrix Metal Properties For the magnetic method, the magnetic properties and surface roughness of the base metal of the standard sheet should be similar to the magnetic properties and surface roughness of the base metal of the test piece.


2. Base metal thickness: Check whether the thickness of the base metal exceeds the critical thickness. If not, it can be measured after calibration.


3. Edge effects: Measurements should not be taken at sudden changes in the specimen, such as edges, holes and inner corners.


4. Curvature: should not be measured on the curved surface of the test piece.


5. Number of readings: Usually, because each reading of the instrument is not exactly the same, the local difference in the thickness of the cover layer also requires multiple measurements in any given area, especially when the surface is rough.


6. Surface cleanliness: Before the measurement, any adhering substances such as dust, grease and corrosion products on the surface should be removed, but do not remove any covering material.


7. Magnetic field: The magnetic field generated by various electrical equipment around it will seriously interfere with the magnetic thickness measurement work.


8. Probe orientation: The placement of the probe has an effect on the measurement and should be perpendicular to the workpiece during the measurement.


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