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BS EN ISO 4518:2021

$102.76

Metallic coatings. Measurement of coating thickness. Profilometric method

Published By Publication Date Number of Pages
BSI 2021 16
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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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Instrumentation — Operational parameters and measurement characteristics
5.1 Types of profile recording instruments
8 5.2 Stylus instruments
5.2.4 Profile recording instruments with the following properties:
5.3 Inductive measuring probes or displacement sensors
9 5.4 Optical profilometers
10 6 Factors relating to accuracy
6.1 Profile record
6.2 Vertical magnification (only for instruments with chart recorders)
6.3 Graphical measurements
6.4 Applied force (only for profilometers with stylus)
6.5 Stylus diameter and surface roughness
6.6 Surface roughness
11 6.7 Vibrations
6.8 Surface curvature
6.9 Cleanliness
6.10 Temperature
6.11 Step configuration
6.12 Datum reference (only for profilometers with stylus)
6.13 Calibration
7 Calibration
12 8 Measuring procedure
8.1 Preparation of step
13 8.2 Recording of profiles
8.3 Measurement of thickness
8.4 Measurement accuracy
9 Test report
14 Bibliography
BS EN ISO 4518:2021
$102.76