EN ISO 9455-16:2019

SLOVENSKI STANDARD
01-marec-2020
Nadomešča:
SIST EN ISO 9455-16:2013
Talila za mehko spajkanje - Preskusne metode - 16. del: Preskus učinkovitosti
talila z metodo za merjenje omočljivosti (ISO 9455-16:2019)
Soft soldering fluxes - Test methods - Part 16: Flux efficacy test, wetting balance method
(ISO 9455-16:2019)
Flussmittel zum Weichlöten - Prüfverfahren - Teil 16: Bestimmung der Wirksamkeit des
Flussmittels, Verfahren zur Messung der Benetzungskraft (ISO 9455-16:2019)
Flux de brasage tendre - Méthodes d'essai - Partie 16: Essai d'efficacité du flux,
méthode à la balance de mouillage (ISO 9455-16:2019)
Ta slovenski standard je istoveten z: EN ISO 9455-16:2019
ICS:
25.160.50 Trdo in mehko lotanje Brazing and soldering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9455-16
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 25.160.50 Supersedes EN ISO 9455-16:2013
English Version
Soft soldering fluxes - Test methods - Part 16: Flux efficacy
test, wetting balance method (ISO 9455-16:2019)
Flux de brasage tendre - Méthodes d'essai - Partie 16: Flussmittel zum Weichlöten - Prüfverfahren - Teil 16:
Essai d'efficacité du flux, méthode à la balance de Bestimmung der Wirksamkeit des Flussmittels,
mouillage (ISO 9455-16:2019) Verfahren zur Messung der Benetzungskraft (ISO
9455-16:2019)
This European Standard was approved by CEN on 16 September 2019.

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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9455-16:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9455-16:2019) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” the secretariat of which is held by DIN.
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 April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
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 9455-16:2013.
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 9455-16:2019 has been approved by CEN as EN ISO 9455-16:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 9455-16
Third edition
2019-09
Soft soldering fluxes — Test
methods —
Part 16:
Flux efficacy test, wetting balance
method
Flux de brasage tendre — Méthodes d'essai —
Partie 16: Essai d'efficacité du flux, méthode à la balance de
mouillage
Reference number
ISO 9455-16:2019(E)
©
ISO 2019
ISO 9455-16:2019(E)
© ISO 2019
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.
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Phone: +41 22 749 01 11
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Published in Switzerland
ii © ISO 2019 – All rights reserved

ISO 9455-16:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Principle . 2
6 Reagents . 2
7 Apparatus . 2
8 Test pieces . 3
9 Procedure. 3
9.1 Preparation of the test pieces. 3
9.1.1 Cleaning . 3
9.1.2 Ageing the surface by sulfidation process . 3
9.1.3 Steam ageing the surface . 3
9.1.4 Damp-heat, steady-state ageing . . 4
9.2 Test method . 4
10 Reference value using standard flux . 4
11 Presentation of results . 5
12 Calculation and expression of results . 6
13 Test report . 7
Annex A (normative) Method for the preparation of standard rosin (colophony) based
liquid fluxes having 25 % (by mass) non-volatile content . 8
Annex B (normative) Method for the production of test pieces with a controlled-
contaminated surface for the wetting balance test (artificial sulfidation method) .10
Bibliography .19
ISO 9455-16:2019(E)
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
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 44, Welding and allied processes,
Subcommittee SC 12, Soldering materials.
This third edition cancels and replaces the second edition (ISO 9455-16:2013), of which it constitutes a
minor revision.
The main changes compared to the previous edition are as follows:
— Clause 2 has been updated;
— the coding of the fluxes has been updated in accordance with ISO 9454-1:2016;
— the format of this document has been updated.
A list of all parts in the ISO 9455 series can be found on the ISO website.
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 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 9455-16:2019(E)
Soft soldering fluxes — Test methods —
Part 16:
Flux efficacy test, wetting balance method
1 Scope
This document specifies a method for the assessment of the efficacy of a soft soldering flux, known as
the wetting balance method. It gives a qualitative assessment of the comparative efficacy of two fluxes
(for example, a standard and a test flux), based on their capacity to promote wetting of a metal surface
by liquid solder. The method is applicable to all flux types in liquid form classified in ISO 9454-1.
NOTE It is hoped that future developments using improved techniques for obtaining a reproducible range
of test surfaces will enable this method for assessing flux efficacy to be quantitative. For this reason, several
alternative procedures for preparing the surface of the test piece are included in the present method.
2 Normative references
The following documents are referred to in the text
...