SIST EN ISO 9455-16:2002
(Main)Soft soldering fluxes - Test methods - Part 16: Flux efficacy tests, wetting balance method (ISO 9455-16:1998)
Soft soldering fluxes - Test methods - Part 16: Flux efficacy tests, wetting balance method (ISO 9455-16:1998)
This part of EN ISO 9455 specifies a method for the assessment of the efficacy of a soft soldering flux, known as the wetting balance method.
Flussmittel zum Weichlöten - Prüfverfahren - Teil 16: Bestimmung der Wirksamkeit des Flussmittels, Verfahren zur Messung der Benetzungskraft (ISO 9455-16:1998)
Dieser Teil der ISO 9455 legt ein Verfahren zum Beurteilen der Wirksamkeit eines Flussmittels zum Weichlöten fest, das als Verfahren zur Messung der Benetzungskraft bezeichnet wird. Es bietet eine qualitative Beurteilung für den Vergleich der Wirksamkeit zweier Flussmittel (z. B. ein Standard-Flussmittel mit einem zu prüfenden Fluss-mittel) hinsichtlich ihrer Fähigkeiten die Benetzung einer Metalloberfläche durch ein flüssiges Weichlot zu fördern. Das Verfahren ist für alle flüssigen Flussmitteltypen anwendbar, die in ISO 9454-1 aufgeführt sind.
ANMERKUNG Es ist anzunehmen, dass zukünftige Entwicklungen mit verbesserten Verfahren einen reproduzierbaren Oberflächenbereich zum Prüfen ergeben, die es möglich machen, dieses Verfahren zum Beurteilen der Flussmittelwirksamkeit quantitativ einzusetzen. Aus diesem Grund sind verschiedene alterna-tive Verfahren zur Vorbereitung der Prüfstückoberfläche in der vorliegenden Norm enthalten.
Flux de brasage tendre - Méthodes d'essai - Partie 16: Essais d'efficacité des flux, méthode a la balance de mouillage (ISO 9455-16:1998)
La présente partie de l'ISO 9455 prescrit une méthode pour l'évaluation de l'efficacité d'un flux de brasage tendre, connue sous le nom de méthode à la balance de mouillage. Elle permet une évaluation qualitative de l'efficacité de deux flux faisant l'objet d'une comparaison (par exemple un flux de référence et un flux d'essai), évaluation fondée sur la capacité de ces flux à faciliter le mouillage de la surface d'un métal par le produit d'apport liquide. Cette méthode est applicable à tous les types de flux sous forme liquide classés dans l'ISO 9454-1.
NOTE Il est souhaitable que de futurs développements, bénéficiant du progrès technique pour obtenir une gamme de surfaces d'essai reproductibles, permettront à cette méthode d'évaluation de l'efficacité des flux de fournir des résultats quantitatifs. C'est pourquoi plusieurs autres modes opératoires de préparation de la surface de la pièce d'essai sont inclus dans la présente méthode.
Talila za mehko spajkanje - Preskusne metode - 16. del: Preskus učinkovitosti, postopek za merjenje omočljivosti (ISO 9455-16:1998)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 9455-16:2002
01-maj-2002
7DOLOD]DPHKNRVSDMNDQMH3UHVNXVQHPHWRGHGHO 3UHVNXVXþLQNRYLWRVWL
SRVWRSHN]DPHUMHQMHRPRþOMLYRVWL ,62
Soft soldering fluxes - Test methods - Part 16: Flux efficacy tests, wetting balance
method (ISO 9455-16:1998)
Flussmittel zum Weichlöten - Prüfverfahren - Teil 16: Bestimmung der Wirksamkeit des
Flussmittels, Verfahren zur Messung der Benetzungskraft (ISO 9455-16:1998)
Flux de brasage tendre - Méthodes d'essai - Partie 16: Essais d'efficacité des flux,
méthode a la balance de mouillage (ISO 9455-16:1998)
Ta slovenski standard je istoveten z: EN ISO 9455-16:2001
ICS:
25.160.50 Trdo in mehko lotanje Brazing and soldering
SIST EN ISO 9455-16:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 9455-16:2002
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SIST EN ISO 9455-16:2002
EUROPEAN STANDARD
EN ISO 9455-16
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2001
ICS 25.160.50
English version
Soft soldering fluxes - Test methods - Part 16: Flux efficacy
tests, wetting balance method (ISO 9455-16:1998)
Flux de brasage tendre - Méthodes d'essai - Partie 16: Flussmittel zum Weichlöten - Prüfverfahren - Teil 16:
Essais d'efficacité des flux, méthode à la balance de Bestimmung der Wirksamkeit des Flussmittels, Verfahren
mouillage (ISO 9455-16:1998) zur Messung der Benetzungskraft (ISO 9455-16:1998)
This European Standard was approved by CEN on 14 June 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9455-16:2001 E
worldwide for CEN national Members.
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SIST EN ISO 9455-16:2002
EN ISO 9455-16:2001 (E)
CORRECTED 2002-09-18
Foreword
This document (EN ISO 9455-16:2001) has been prepared by Technical Committee ISO/TC
44 "Welding and allied processes" in collaboration with Technical Committee CEN/TC 121
"Welding", the secretariat of which is held by DS.
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 February 2002, and conflicting national
standards shall be withdrawn at the latest by February 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of ISO 9455-16:1998 has been approved by CEN as EN ISO 9455-16:2001 without
any modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
2
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SIST EN ISO 9455-16:2002
EN ISO 9455-16:2001 (E)
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 9453 1990 Soft soldering fluxes - Chemical compositions EN 29453 1993
and forms
ISO 9454-1 1990 Soft soldering fluxes - Classification and EN 29454-1 1993
requirements - Part 1: Classification, labelling
and packaging
3
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SIST EN ISO 9455-16:2002
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SIST EN ISO 9455-16:2002
INTERNATIONAL ISO
STANDARD 9455-16
First edition
1998-12-01
Soft soldering fluxes — Test methods —
Part 16:
Flux efficacy tests, wetting balance method
Flux de brassage tendre — Méthodes d’essai —
Partie 16: Essais d’efficacité des flux, méthode à la balance de mouillage
A
Reference number
ISO 9455-16:1998(E)
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SIST EN ISO 9455-16:2002
ISO 9455-16:1998(E)
Contents Page
1 Scope . 1
2 Normative references . 1
3 Principle. 1
4 Reagents. 2
5 Apparatus . 2
6 Test pieces . 2
7 Procedure . 2
7.1 Preparation of the test pieces . 2
7.2 Test method. 3
8 Reference value using standard flux . 3
9 Presentation of results . 4
10 Expression of results . 5
11 Test report . 6
Annex A (normative) Method for the preparation of standard
reference rosin (colophony) based liquid fluxes having
25 % (m/m) non-volatile content. 7
Annex B (normative) Method for the production of a controlled
contaminated surface sample for the wetting balance test
(artificial sulfidation method). 9
© ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
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SIST EN ISO 9455-16:2002
© ISO
ISO 9455-16:1998(E)
Foreword
ISO (the International Organisation 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 9455-16 was prepared by Technical Committee
ISO/TC 44, Welding and allied processes, Subcommittee SC 12, Soldering
and brazing materials.
ISO 9455 consists of the following parts, under the general title Soft soldering
fluxes — Test methods:
Part 1: Determination of non-volatile matter, gravimetric method
Part 2: Determination of non-volatile matter, ebulliometric method
Part 3: Determination of acid value, potentiometric and visual titration
methods
Part 5: Copper mirror test
Part 6: Determination and detection of halide (excluding fluoride)
content
Part 8: Determination of zinc content
Part 9: Determination of ammonia content
Part 10: Flux efficacy tests, solder spread method
Part 11: Solubility of flux residues
Part 12: Steel tube corrosion test
Part 13: Determination of flux spattering
Part 14: Assessment of tackiness of flux residues
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SIST EN ISO 9455-16:2002
© ISO
ISO 9455-16:1998(E)
Part 15: Copper corrosion test
Part 16: Flux efficacy tests, wetting balance method
Part 17: Surface insulation resistance, comb test and electrochemical
migration test of flux residues
Annexes A and B form an integral part of this part of ISO 9455.
iv
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SIST EN ISO 9455-16:2002
INTERNATIONAL STANDARD © ISO ISO 9455-16:1998(E)
Soft soldering fluxes — Test methods —
Part 16:
Flux efficacy tests, wetting balance method
1 Scope
This part of ISO 9455 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 standards contain provisions which, through reference in this text, constitute provisions of this part of
ISO 9455. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 9455 are encouraged to investigate the possibility of applying the
most recent edition of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 1634-1:1987, Wrought copper and copper alloy plate, sheet and strip — Part 1: Technical conditions of delivery
for plate, sheet, and strip for general purposes.
ISO 9453:1990, Soft solder alloys — Chemical compositions and forms.
ISO 9454-1:1990,
Soft soldering fluxes — Classification and requirements — Part 1: Classification, labelling and
packaging.
IEC 60068-2-3:1969,
Environmental testing. Part 2: Tests. Test Ca: Damp heat, steady state.
IEC 60068-2-20:1979, Environmental testing. Part 2: Tests. Test T: Soldering
IEC 60068-2-54:1985, Environmental testing. Part 2: Tests. Test Ta: Soldering - Solderability testing by the wetting
balance method.
3 Principle
The efficacy of the liquid flux under test is compared with that of a standard liquid flux using a wetting balance in
conjunction with a prescribed test piece, appropriate to the class of flux under test.
1
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SIST EN ISO 9455-16:2002
© ISO
ISO 9455-16:1998(E)
4 Reagents
In the test use only reagents of recognized analytical quality and only distilled or de-ionized water.
4.1 Acid cleaning solution.
Add cautiously, while stirring, 75 ml of sulphuric acid (r = 1,84 g/ml) to 210 ml of water and mix. Cool the solution to
room temperature. Add 15 ml of nitric acid (r = 1,42 g/ml) and mix thoroughly.
4.2 Acetone.
5 Apparatus
Usual laboratory apparatus and, in particular, the following.
5.1 Wetting balance and ancillary instrumentation, as described in IEC 600682 54.
NOTE The apparatus is to be calibrated in accordance with the manufacturer's instructions.
5.2 Solder bath, containing molten tin-lead solder complying with ISO 9453, grade S-Sn60Pb40E or S-Sn63Pb37E,
maintained at a temperature of (235 ± 3) °C. The dimensions of the solder bath shall be such that no portion of the
test piece (clause 6) is less than 15 mm from the wall of the bath and the depth of the liquid solder in the bath shall
be not less than 30 mm.
5.3 Acid-free filter paper.
6 Test pieces
Test pieces cut from a copper and of rectangular shape sheet are used. The dimensions of each test piece shall be
as follows:
width: (10,0 – 0,1) mm;
length: constant between 15 mm and 30 mm, to suit the equipment used;
thickness either 0,10 mm – 0,02 mm or 0,30 mm – 0,05 mm.
When testing fluxes of type 1 or 2 (as defined in ISO 9454-1), the test pieces shall be cut from copper sheet
complying with ISO 1634-1: Grade Cu-ETP, temper HA.
The sheet used for preparing the test pieces shall be clean and free from contamination. In order to obtain accurate
results, the test pieces shall be cut cleanly without leaving significant burrs.
7 Procedure
7.1 Preparation of the test pieces
7.1.1 Cleaning
The test pieces shall be handled with clean tongs throughout. Select sufficient test pieces (see clause 6) to allow
ten per test flux and ten per standard flux. Degrease them in acetone (4.2) and allow to dry. Immerse them for 20 s
in the acid cleaning solution (4.1) at room temperature. Remove the test pieces from the acid cleaning solution
(4.1), wash for about five seconds under running tap water. Rinse with distilled or deionized water then acetone
(4.2) and dry with acid-free filter paper (5.3).
NOTE If required, the test pieces may be stored in acetone after rinsing them in deionized water. When needed they should
be removed from the acetone and dried with acid-free filter paper (5.3).
2
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ISO 9455-16:1998(E)
Subject all the test pieces to one of the ageing procedures given in 7.1.2 to 7.1.4. as agreed between the flux
supplier and the user.
7.1.2 Ageing the surface by sulfidation process
Carry out the procedure given in annex B on all the cleaned test pieces (see 7.1.1).
7.1.3 Steam ageing the surface
Carry out the steam ageing procedure given in IEC 60068-2-20 (1979), clause 4.5.1, ageing 1b, for a period of 4 h
on all the cleaned test pieces (see 7.1.1).
7.1.4 Damp heat, steady state ageing
Subject all the cleaned pieces (see 7.1.1) to the test chamber conditions specified in IEC 60068-2-3 (1969), clause
2, for a period selected from 1 h, 4 h or 24 h.
7.2 Test method
7.2.1 Carry out the following test procedure on each of the ten test pieces. Complete all ten tests within 45 min of
the preparation stage (see 7.1).
7.2.2 If the flux under test is of type 1 or type 2 (as defined in ISO 9454-1), maintain the temperature of the solder
bath at (235 – 3) °C.
NOTE When testing fluxes which are not type 1 or type 2 (as defined in ISO 9454-1), the bath temperature requirements and
the standard flux to be used for comparison (see clause 8) should be agreed between the purchaser and the supplier.
7.2.3 Remove one of the test pieces from the acetone, dry it between two sheets of acid-free filter paper (5.3) and
place it in the wetting balance specimen clip, so that the long edges are vertical. Dip the test piece in the flux
solution under test at room temperature, to a depth of no less than 3 mm greater than the selected depth for
immersion of the test piece in the solder (see 7.2.5). Avoid excess flux by withdrawing the test piece cornerwise
from the flux. If excess flux is still visible, touch the corner of the test piece on clean filter paper.
7.2.4 Attach the specimen clip to the wetting balance ensuring that the bottom edge of the test piece is horizontal
and approximately 20 mm above the solder bath (5.2). Allow it to remain there for (20 5) s, so that the solvent in
–
the flux may evaporate before the test commences (see note). During this drying period, adjust the suspension
force signal and recorder trace to the desired zero position.
NOTE Some types of flux may require a shorter, or a longer, drying time than (20 – 5) s. In these cases, the drying time
should be agreed between the flux supplier and the user.
Immediately before starting the test, scrape the surface of the solder bath with a blade of suitable material to
remove oxides.
7.2.5 By either raising the solder bath, or lowering the test piece, dip the test piece into the molten solder at a
speed of (20 – 5) mm/s to a selected depth of either 3 mm – 0,2 mm or 4 mm – 0,2 mm.
Hold the test piece in this position for 5 s to 10 s and then withdraw it at a speed of (20 – 5) mm/s. Record the
wetting force against time for the period during which the test piece is in contact with the solder.
7.2.6 Repeat operations 7.2.2 to 7.2.5 for each of the remaining nine test pieces.
8 Reference value using standard flux
Carry out the procedure described in clause 7, using a further ten test pieces (see clause 6), and using a standard
flux instead of the sample flux under test. If the flux under test is of type 1 or type 2, the standard flux prepared as
described in annex A may be used. If the flux under test is of type 1.1.1 or 1.2.1, use the standard flux prepared as
described in A.5.1. If the flux under test is of type 1.1.2, 1.1.3, 1.2.2 or 1.2.3, use the standard flux prepared as
described in A.5.2.
If the flux under test is not of type 1 or type 2, use a standard flux agreed upon by the purchaser and supplier. (See
the note to 7.2.2.)
3
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SIST EN ISO 9455-16:2002
© ISO
ISO 9455-16:1998(E)
9 Presentation of results
A typical trace of wetting force against time is given in figure 1.
In figure 1 non-wetting (upward) forces are shown as negative and wetting (downward) forces are positive.
Figure 1 — Recorded trace for wetting balance method showing significant points
The following are the points of significance in figure 1.
Time t is the time at which the test piece first makes contact with the surface of the liquid solder in the bath. It
0
is indicated by a sharp deviation of the recorder trace from the zero force line.
Time t is the moment at which the solder starts to wet the test piece and corresponds to point A at which the
1
trace begins to fall.
Time t , corresponding to point B, is the moment at which the recorded force is equal to the upward force due
2
to buoyancy. The position of the sample buoyancy line is calculated from the density of the solder and the
depth of immersion of the test piece as follows.
1)
Force at point B, in mN = 0,08 3 d 3 a
1) This value applies only to molten 60/40 tin/lead solder at 235 °C.
4
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SIST EN ISO 9455-16:2002
© ISO
ISO 9455-16:1998(E)
where
d is the depth of immersion, in millimetres, of the test piece below the undisturbed solder level;
a is the cross sectional area, in square millimetres, of the test piece at the solder line.
Time t is the time at which the trace crosses the reference line. The line is drawn at a distance corresponding
3
to a force, F, depending on the test piece thickness and the immersion depth as given in table 1.
Table 1 — Force dependence on test piece thickn
...
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