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ISO 4518:2021

Metallic coatings — Measurement of coating thickness — Profilometric method

Apr 8, 2021

General information

90.20     Apr 15, 2026

ISO

ISO/TC 107

International Standard

25.220.40  

English   French  

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4518:1980

NOW

PUBLISHED
ISO 4518:2021
90.20 Standard under periodical review
Apr 15, 2026

National adoptions

SRPS EN ISO 4518:2021  
ISS

Metallic coatings - Measurement of coating thickness - Profilometric method (ISO 4518:2021)

60.60   Standard published

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