SIST EN ISO 4524-3:2022

Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:2021)

This document specifies four electrographic tests for assessing the porosity of electrodeposited gold and gold alloy coatings for engineering, and decorative and protective purposes.

Metallische Überzüge - Prüfverfahren für elektrolytisch abgeschiedene Überzüge aus Gold und Goldlegierungen - Teil 3: Elektrografische Prüfungen (ISO 4524-3:2021)

Dieses Dokument legt vier elektrographische Prüfungen zur Beurteilung der Porosität galvanisch ab-geschiedener Überzüge aus Gold und Goldlegierungen für technische, dekorative und schützende Anwendungen fest.

Revêtements métalliques - Méthodes d'essai des dépôts électrolytiques d'or et d'alliages d'or - Partie 3: Détermination électrographique de la porosité (ISO 4524-3:2021)

Le présent document décrit quatre essais électrographiques pour déterminer la porosité des dépôts électrolytiques d’or et d’alliages d’or pour utilisation dans l’industrie, la décoration et la protection.

Kovinske prevleke - Preskusne metode za galvansko nanašanje zlata in njegovih zlitin - 3. del: Elektrografsko ugotavljanje poroznosti (ISO 4524-3:2021)

Ta dokument določa:
– mere ter mehanske, hidravlične in akustične značilnosti, ki jim naj ustrezajo regulatorji pretoka za sanitarne armature (z regulacijo pretoka in brez nje);
– postopke za preskušanje teh značilnosti.
Ta dokument se uporablja za:
– regulatorje pretoka za sanitarne armature, namenjene za namestitev na armature, ki se uporabljajo s sanitarnimi napravami v straniščih, kopalnicah in kuhinjah (npr. enojne pipe, kombinirane pipe, mehanski mešalni ventili, termostatski mešalni ventili);
– regulatorje pretoka za sanitarne armature, ki se uporabljajo v naslednjih tlačnih in temperaturnih pogojih:
Opomba 1: Regulatorje pretoka za sanitarne armature je mogoče priključiti samo za tesnilom sanitarne armature.
Opomba 2: Zaradi jedrnatosti se v preostalem delu tega dokumenta namesto izraza regulatorji pretoka za sanitarne armature uporablja samo izraz regulatorji pretoka.
Opomba 3: Preskusi, opisani v tem dokumentu, so tipski preskusi (laboratorijski preskusi) in ne kontrolni preskusi kakovosti, opravljeni med proizvodnjo.

General Information

• Status: Published
• Public Enquiry End Date: 14-Dec-2020
• Publication Date: 23-Nov-2021
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Nov-2021
• Due Date: 15-Jan-2022
• Completion Date: 24-Nov-2021
• Ref Project: EN ISO 4524-3:2021 - Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:2021)

Relations

• Replaces: SIST EN ISO 4524-3:1999 - Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:1985)
• Effective Date: 10-Nov-2021
• Revised: SIST EN ISO 4524-3:1999 - Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity (ISO 4524-3:1985)
• Effective Date: 01-Dec-2020

Overview

EN ISO 4524-3:2021 - “Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part 3: Electrographic tests for porosity” specifies four electrographic test methods used to detect and assess porosity in electrodeposited gold and gold-alloy coatings for engineering, decorative and protective applications. The standard is part of the ISO 4524 series and is endorsed by CEN (European Standard EN ISO 4524-3:2021).

Key topics and technical requirements

• Scope: Defines four electrographic porosity tests for electrodeposited gold and gold-alloy coatings.
• Test methods included:
  • Nioxime paper test - suitable for gold coatings over nickel or tin‑nickel undercoats. Key procedural points: soak paper in 8 g/l nioxime solution, use moistened blotting paper, compress assembly uniformly at 1.4–1.7 MPa, apply DC voltage ≤ 12 V at an initial current density of 7.5 mA/cm for 30 s. Defects show as pink stains after exposure to ammonia vapour (green stains indicate defects in nickel/tin‑nickel undercoats on copper).
  • Dye‑transfer paper test (Test 1) - suitable for gold coatings on copper. Prepare dye‑transfer paper by soaking for 30 min in a 0.01 mol/l NaCl + 0.01 mol/l Na2CO3 solution (0.58 g NaCl + 1.06 g Na2CO3 per litre), blot and proceed per procedure.
  • Dye‑transfer paper test (Test 2) - a variant method for specific substrate/coating conditions (method details are provided in the standard).
  • Electrographic gelatine film test - uses gelatine film, electrolyte solution and indicators (e.g., dimethylglyoxime) with defined electrolytic, drying and evaluation steps to reveal porosity.
• Materials and reagent quality: Recommends analytical-grade reagents and distilled or equivalent purity water.
• Removed content: The earlier cadmium sulphide paper test was deleted due to restrictions on cadmium use.

Applications

• Quality control for electroplating and finishing operations to detect pinholes, porosity pathways and undercoat exposure.
• Acceptance testing in decorative, electronic, and corrosion‑protective gold plating (e.g., connectors, jewelry, precision parts).
• Failure analysis to pinpoint localized coating defects that could lead to corrosion or electrical failures.
• Process validation when changing plating chemistry, undercoat systems, or operating parameters.

Who should use this standard

• Plating laboratories and quality assurance teams
• Coating and surface‑engineering engineers
• Manufacturers of electronic contacts, connectors and jewelry
• Test laboratories performing porosity and adhesion assessments

Related standards

• Other parts of the ISO 4524 series (see ISO catalogue for the complete list). For national implementation, consult CEN/ISO member bodies and the endorsed EN version (EN ISO 4524-3:2021).

Keywords: EN ISO 4524-3:2021, electrodeposited gold, gold alloy coatings, porosity tests, electrographic tests, nioxime paper test, dye-transfer paper, gelatine film test, electroplating quality control.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2022
Nadomešča:
SIST EN ISO 4524-3:1999
Kovinske prevleke - Preskusne metode za galvansko nanašanje zlata in njegovih
zlitin - 3. del: Elektrografsko ugotavljanje poroznosti (ISO 4524-3:2021)
Metallic coatings - Test methods for electrodeposited gold and gold alloy coatings - Part
3: Electrographic tests for porosity (ISO 4524-3:2021)
Metallische Überzüge - Prüfverfahren für elektrolytisch abgeschiedene Überzüge aus
Gold und Goldlegierungen - Teil 3: Elektrografische Prüfungen (ISO 4524-3:2021)
Revêtements métalliques - Méthodes d'essai des dépôts électrolytiques d'or et d'alliages
d'or - Partie 3: Détermination électrographique de la porosité (ISO 4524-3:2021)
Ta slovenski standard je istoveten z: EN ISO 4524-3:2021
ICS:
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4524-3
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2021
EUROPÄISCHE NORM
ICS 25.220.40 Supersedes EN ISO 4524-3:1995
English Version
Metallic coatings - Test methods for electrodeposited gold
and gold alloy coatings - Part 3: Electrographic tests for
porosity (ISO 4524-3:2021)
Revêtements métalliques - Méthodes d'essai des Metallische Überzüge - Prüfverfahren für elektrolytisch
dépôts électrolytiques d'or et d'alliages d'or - Partie 3: abgeschiedene Überzüge aus Gold und
Détermination électrographique de la porosité (ISO Goldlegierungen - Teil 3: Elektrografische Prüfungen
4524-3:2021) (ISO 4524-3:2021)
This European Standard was approved by CEN on 22 September 2021.

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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4524-3:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4524-3:2021) 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 May 2022, and conflicting national standards shall be
withdrawn at the latest by May 2022.
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 4524-3:1995.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 4524-3:2021 has been approved by CEN as EN ISO 4524-3:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 4524-3
Second edition
2021-10
Metallic coatings — Test methods for
electrodeposited gold and gold alloy
coatings —
Part 3:
Electrographic tests for porosity
Revêtements métalliques — Méthodes d'essai des dépôts
électrolytiques d'or et d'alliages d'or —
Partie 3: Détermination électrographique de la porosité
Reference number
ISO 4524-3:2021(E)
ISO 4524-3:2021(E)
© ISO 2021
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 4524-3:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Nioxime paper test .1
4.1 Applicability . 1
4.2 Materials . 1
4.2.1 General . 1
4.2.2 Nioxime paper . 1
4.2.3 Moistened blotting paper . 1
4.3 Procedure . 2
5 Dye-transfer paper test 1 . 2
5.1 Applicability . 2
5.2 Materials . 2
5.2.1 General . 2
5.2.2 Dye-transfer paper . 2
5.3 Procedure . 2
6 Dye-transfer paper test 2 . 3
7 Electrographic gelatine film test .3
7.1 Principle . 3
7.2 Reagents . 3
7.2.1 Gelatine . 3
7.2.2 Electrolyte solution. 3
7.2.3 Dimethylglyoxime, indicator solution . 4
7.3 Testing solution . 4
7.4 Apparatus . 4
7.5 Procedure . 4
7.5.1 Electrolytic process . 4
7.5.2 Drying . 4
7.5.3 Evaluation . 4
7.6 Expression of results . 5
8 Test report . 5
iii
ISO 4524-3:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standar
...