SIST EN ISO 3882:2024

SLOVENSKI STANDARD
01-marec-2024
Kovinske in druge anorganske prevleke - Pregled metod za merjenje debeline (ISO
3882:2024)
Metallic and other inorganic coatings - Review of methods of measurement of thickness
(ISO 3882:2024)
Metallische und andere anorganische Überzüge - Übersicht über Verfahren zur
Schichtdickenmessung (ISO 3882:2024)
Revêtements métalliques et autres revêtements inorganiques - Revue des méthodes de
mesurage de l’épaisseur (ISO 3882:2024)
Ta slovenski standard je istoveten z: EN ISO 3882:2024
ICS:
17.040.20 Lastnosti površin Properties of surfaces
25.220.20 Površinska obdelava Surface treatment
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3882
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2024
EUROPÄISCHE NORM
ICS 25.220.40; 25.220.20 Supersedes EN ISO 3882:2003
English Version
Metallic and other inorganic coatings - Review of methods
of measurement of thickness (ISO 3882:2024)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Revue des méthodes de mesurage de Übersicht über Verfahren zur Schichtdickenmessung
l'épaisseur (ISO 3882:2024) (ISO 3882:2024)
This European Standard was approved by CEN on 29 December 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3882:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3882:2024) has been prepared by Technical Committee ISO/TC 107 "Metallic
and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by July 2024, and conflicting national standards shall be
withdrawn at the latest by July 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 3882:2003.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3882:2024 has been approved by CEN as EN ISO 3882:2024 without any modification.

International
Standard
ISO 3882
Fourth edition
Metallic and other inorganic
2024-01
coatings — Review of methods of
measurement of thickness
Revêtements métalliques et autres revêtements inorganiques —
Revue des méthodes de mesurage de l’épaisseur
Reference number
ISO 3882:2024(en) © ISO 2024
ISO 3882:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 3882:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Overview . 1
5 Non-destructive methods . 2
5.1 Split beam microscope (light section) method, ISO 2128 .2
5.2 Magnetic methods, ISO 2178 and ISO 2361 .2
5.3 Eddy current methods, ISO 2360 and ISO 21968 .2
5.4 X-ray spectrometric method, ISO 3497 .3
5.5 Beta backscatter method, ISO 3543 . .3
6 Destructive methods . 4
6.1 Microscopical (optical) method, ISO 1463 .4
6.2 Fizeau multiple-beam interferometry method, ISO 3868 .4
6.3 Profilometric method, ISO 4518 .4
6.4 Scanning electron microscope method, ISO 9220 .4
6.5 Dissolution methods .4
6.5.1 Coulometric method, ISO 2177 .4
6.5.2 Gravimetric (strip and weigh) method, ISO 10111 .5
6.5.3 Gravimetric (analytical) method, ISO 10111 .5
Annex A (informative) Typical measuring application and range. 6
Bibliography . 9

iii
ISO 3882:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 262,
Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and
alloys, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 3882:2003), which has been technically
revised.
The main changes are as follows:
— editorial revisions;
— restructuring of the document;
— former Tables 2 and 3 moved to Annex A;
— new subclause 6.5.1.2 for the STEP method;
— review of measurement uncertainties;
— phase-sensitive eddy current, as described in ISO 21968, added to measurement methods and Tables A.1
and A.2.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO 3882:2024(en)
Introduction
This document summarizes the various methods used for the measurement of coating thickness and
describes their working principles. Methods of measuring coating thickness are either destructive or non-
destructive (see Table 1). The information given in Annex A, Table A.1 will assist in the choice of typical
instrumental methods suitable for thickness measurements. For all instrumental methods, manufacturers’
instructions contain useful information on the correct handling of the instruments.
The thickness ranges covered by the different methods depend on the coating materials, thickness of the
coating, substrates and instruments used (see Annex A, Table A.2); for example, although X-ray spectrometry
can be used to measure the thickness of a chromium coating, thicknesses of 20 µm or more cannot be
measured with sufficient precision. Similarly, while magnetic methods can be used to measure the thickness
of a gold coating over a magnetic steel substrate, many magnetic instruments do not have the sensitivity to
measure accurately thicknesses of gold coatings less than 2 µm.
Where a referee method is required, the appropriate coating specification can contain useful information on
the preferred method.
v
International Standard ISO 3882:2024(en)
Metallic and other inorganic coatings — Review of methods of
measurement of thickness
1 Scope
This document reviews methods for measuring the thickness of metallic and other inorganic coatings on
both metallic and non-metallic substrates (see Tables 1, A.1 and A.2). It is limited to tests already specified,
or to be specified, in International Standards and excludes certain tests that are used for special applications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 2064, Metallic and other inorganic coatings — Definitions and conventions concerning the measurement of
thickness
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2064 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Overview
Table 1 summarizes the methods of measuring coating thickness that are discussed in this document.
Table 1 — Methods of measuring coating thickness
Non-destructive Destructive
a
Split beam microscope (light section) ISO 2128 Microscopical (optical) ISO 1463
b
Magnetic ISO 2178 and Fizeau multiple-beam interferometry ISO 3868
ISO 2361
b
Eddy current —  amplitude-sensitive ISO 2360 Profilometric (stylus and optical) ISO 4518
—  phase-sensitive ISO 21968
X-ray spectrometric ISO 3497 Scanning electron microscope ISO 9220
Beta backscatter ISO 3543 Dissolution methods:
Gravimetric strip and weigh method and ISO 10111
gravimetric analytical method
Coulometric method ISO 2177
STEP method ISO 16866
a
Can be destructive in some applications.
b
Can be non-destructive in some applications.

ISO 3882:2024(en)
5 Non-destructive methods
5.1 Split beam microscope (light section) method, ISO 2128
This equipment, originally designed for the measurement of surface roughness, is used for measuring the
thickness of transparent and translucent coatings, in particular anodic oxide coatings on aluminium. A light
beam is projected on to the surface at an angle of 45°. Part of the beam is reflected from the surface of
the coating and the rest penetrates the coating and is reflected from the coating–metal substrate interface.
The distance that separates the two images observed in the eyepiece of the microscope is proportional to
the thickness of the coating and can be measured by means of a Vernier screw that controls a calibrated
graticule. The method can be used where sufficient light is reflected from the coating–metal substrate
interface to give a clear image in the microscope. For transparent or translucent coatings, such as anodic
oxide films, this method is non-destructive.
For measuring the thickness of opaque coatings, a small area of the coating is removed; in this application,
the method is destructive. The step between the surface of the coating and the basis metal produces a
deflection of the light beam that gives an absolute measure of the coating thickness.
The method is not suitable for hard anodic coatings or for coatings that are very thin (less than 2 µm thick),
very thick (greater than 100 µm thick) or rough. It is not suitable for coatings on heavily shot-blasted
surfaces. Other methods, such as eddy current (see ISO 2360), interference microscope (see ISO 3868) and
microscopical (see ISO 1463), can be applicable for thickness measurement where the split beam microscope
method cannot be used.
The method is best suited to small parts because of the ease with which they can be set up on the microscope
stage.
The measurement uncertainty of the method is usually less than 10 % of the thickness.
5.2 Magnetic methods, ISO 2178 and ISO 2361
Instruments for these methods measure either the magnetic attraction between a magnet and the basis
metal, as influenced by the pre
...