BS EN ISO 9220:2022
$102.76
Metallic coatings. Measurement of coating thickness. Scanning electron microscope method
Published By | Publication Date | Number of Pages |
BSI | 2022 | 20 |
This document specifies a destructive method for the measurement of the local thickness of metallic and other inorganic coatings by examination of cross-sections with a scanning electron microscope (SEM). The method is applicable for thicknesses up to several millimetres, but for such thick coatings it is usually more practical to use a light microscope (see ISO 1463). The lower thickness limit depends on the achieved measurement uncertainty (see Clause 10). NOTE The method can also be used for organic layers when they are neither damaged by the preparation of the cross-section nor by the electron beam during imaging.
PDF Catalog
PDF Pages | PDF Title |
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2 | National foreword |
4 | European foreword |
6 | Foreword |
7 | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Instrumentation 5.1 Scanning electron microscope 5.2 Tools to calibrate the length measurement function of the SEM software |
8 | 6 Factors influencing the measurement results 6.1 Surface roughness 6.2 Taper of cross-section 6.3 Specimen tilt 6.4 Coating deformation 6.5 Rounding of edges of the coating 6.6 Plating a protection layer 6.7 Etching |
9 | 6.8 Smearing 6.9 Poor contrast 6.10 Magnification 6.11 SEM imaging parameters 7 Preparation of cross-sections 8 Calibration of instruments 8.1 General |
10 | 8.2 Photography 8.3 Measurement 9 Procedure 10 Precision 10.1 General 10.2 Repeatability, r |
11 | 10.3 Reproducibility limit, R 11 Expression of results 12 Test report |
13 | Annex A (informative) General guidance on the preparation and measurement of cross-sections |
16 | Annex B (informative) Details on precision |
18 | Bibliography |