Metallic coatings - Measurement of coating thickness - Profilometric method (ISO 4518:2021)
Metallic coatings - Measurement of coating thickness - Profilometric method (ISO 4518:2021)
This document specifies a method for the measurement of metal coating thickness by first forming a step between the surface of the coating and the surface of its substrate and then measuring the step height using a profile recording instrument. It covers the instrumentation characteristics and the procedure appropriate to this specific application of profilometric methods. The method is applicable to the measurement of thicknesses of metal coatings from 0,01 µm to 1 000 µm on flat surfaces and, if appropriate precautions are taken, on cylindrical surfaces. It is highly suitable for the measurement of minute thicknesses but, for thicknesses of less than 0,01 µm, surface flatness and surface smoothness are very critical and, accordingly, the method is not suitable for use down to the lowest level of measurement usual for electronic stylus instruments. The method is suitable for measuring coating thicknesses when preparing coating thickness reference standards.
EN ISO 4518:2021 (ISO 4518:2021) specifies the profilometric method for measurement of metallic coating thickness. The procedure forms a step between coating and substrate (by dissolving part of the coating or by masking prior to coating) and determines thickness by measuring the step height with a profile-recording instrument. The method applies to coatings from 0,01 µm to 1 000 µm on flat surfaces and, with precautions, on cylindrical surfaces. It is particularly suitable for minute thicknesses and for preparing coating thickness reference standards.
Keywords: EN ISO 4518:2021, ISO 4518:2021, profilometric method, metallic coatings, coating thickness measurement, profilometer.
Упомянутые в описании и другие стандарты SIST
Who uses it: coating laboratories, quality engineers, metrology labs, materials scientists, and manufacturers of profilometric instruments.
For implementation, consult the full EN ISO 4518:2021 text for detailed instrument specifications, tolerances, calibration methods and reporting requirements.