EN ISO 9455-3:1994

Soft soldering fluxes - Test methods - Part 3: Determination of acid value, potentiometric and visual titration methods (ISO 9455-3:1992)

Specifies the two methods for a flux of types 1 and 2 only, as defined in ISO 9454-1. Gives precision of the two methods as determined by interlaboratory tests.

Flußmittel zum Weichlöten - Prüfverfahren - Teil 3: Bestimmung des Säurewertes, potentiometrische und visuelle Titrationsmethoden (ISO 9455-3:1992)

Dieser Teil von ISO 9455 legt zwei Methoden zur Bestimmung des Säurewertes eines Flussmittels der Typen 1 und 2 nach ISO 9454-1 fest. Methode A ist eine potentiometrische Titration und kann als Referenzmethode betrachtet werden. Methode B ist eine alternative Titrationsmethode über die visuelle Endpunktbestimmung.

Flux de brasage tendre - Méthodes d'essai - Partie 3: Détermination de l'indice d'acide par des méthodes de titrage potentiométrique et visuel (ISO 9455-3:1992)

La présente partie de l'ISO 9455 prescrit deux méthodes de détermination de l'indice d'acide des flux de type 1 ou 2 uniquement définis dans l'ISO 9454-1. La méthode A est une méthode de titrage potentiométrique. Elle est considérée comme la méthode de référence. La méthode B est une variante de méthode de titrage à repérage visuel de la fin de la réaction.

Talila za mehko spajkanje - Preskusne metode - 3. del: Določevanje kislinskega števila z metodami potenciometrije in vizualno titracijo (ISO 9455-3:1992)

General Information

• Status: Withdrawn
• Publication Date: 29-Sep-1994
• Withdrawal Date: 12-May-2020
• ICS: 25.160.50 - Brazing and soldering
• Technical Committee: CEN/TC 121 - Welding
• Drafting Committee: CEN/TC 121 - Welding
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 13-May-2020
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: SIST EN ISO 9455-3:2001 - Soft soldering fluxes - Test methods - Part 3: Determination of acid value, potentiometric and visual titration methods (ISO 9455-3:1992)

Relations

• Replaced By: EN ISO 9455-3:2020 - Soft soldering fluxes - Test methods - Part 3: Determination of acid value, potentiometric and visual titration methods (ISO 9455-3:2019)
• Effective Date: 20-May-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2001
7DOLOD]DPHKNRVSDMNDQMH3UHVNXVQHPHWRGHGHO'RORþHYDQMHNLVOLQVNHJD
ãWHYLOD]PHWRGDPLSRWHQFLRPHWULMHLQYL]XDOQRWLWUDFLMR,62
Soft soldering fluxes - Test methods - Part 3: Determination of acid value, potentiometric
and visual titration methods (ISO 9455-3:1992)
Flußmittel zum Weichlöten - Prüfverfahren - Teil 3: Bestimmung des Säurewertes,
potentiometrische und visuelle Titrationsmethoden (ISO 9455-3:1992)
Flux de brasage tendre - Méthodes d'essai - Partie 3: Détermination de l'indice d'acide
par des méthodes de titrage potentiométrique et visuel (ISO 9455-3:1992)
Ta slovenski standard je istoveten z: EN ISO 9455-3:1994
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.

INTERNATIONAL
STANDARD
First edition
1992-05-01
Soft soldering fluxes - Test methods -
Part 3: ,
Determination of acid value, potentiometric and
visual titration methods
Flux de brasage tendre - Mkthodes d’essai -
Partie 3: D6termination de I’indice d’acide par des mkthodes de titrage
potentiom&trique et visuel
Reference number
IS0 9455-3: 1992(E)
IS0 9455-3:1992(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 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 lnter-
national Standard requires approval by at least 75 9/o of the member
bodies casting a vote.
International Standard IS0 9455-3 was prepared by Technical Committee
ISO/TC 44, Welding and allied processes, Sub-Committee SC 12,
Soldering and brazing materials.
general title Soft
IS0 9455 consists of the following parts, under the
\
soldering f7uxes - 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 of halide content
- Part 8: Determination of zinc content
- Part 9: Determination of ammonia content
- Part 10: Flux efficacy tests, solder spread method
- Part I I: Solubility of flux residues
- Part 12: Steel tube corrosion test
0 IS0 1992
All rights reserved. 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 l CH-1211 Gerkve 20 l Switzerland
Printed in Switzerland
ii
IS0 94553:1992(E)
-
Part 13: Determination of f7ux spattering
-
Part 14: Assessment of tackiness of flux residues
-
Part 15: Copper corrosion test
-
Part 16: Flux efficacy tests, wetting balance method
-
Part 17: Determination of surface insulation resistance of f7ux resi-
dues (Comb test)
. . .
III
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_~-~
INTERNATIONAL STANDARD IS0 9455-3:1992(E)
Soft soldering fluxes - Test methods -
Part 3:
Determination of acid value, potentiometric and visual titration
methods
3 Method A: Potentlometric titration
1 Scope
method
This part of IS0 9455 specifies two methods for the
determination of the acid value of a flux of types 1
3.1 Principle
and 2 only, as defined in IS0 9454-l.
A prepared, weighed sample of the flux is dissolved
Method A is a potentiometric titration method and is
in a suitable solvent. The resulting solution is
to be considered as the reference method.
titrated with standard tetrabutyl ammonium hy-
Method B is an alternative, visual end-point, titration
droxide solution, using a glass electrode, the pH or
method.
mV readings being recorded simultaneously. From
the graph of volume of titrant against pH or mV
readings, the point of inflexion is determined, from
which the acid value is calculated.
2 Normative references
NOTE 1 As fluxes of classes 1 .1.3 and 1.2.3 (see
IS0 9454-l) may lose some acidity during the determi-
The following standards contain provisions which,
nation of non-volatile matter, the non-volatile matter ob-
through reference in this text, constitute provisions
tained from carrying out the procedure of IS0 9455-l or
of this part of IS0 9455. At the time of publicationt
IS0 9455-Z on these classes of flux should not be used for
the editions indicated were valid. All standards are
this determination.
subject to revision, and parties to agreements based
on this part of IS0 9455 are encouraged to investi-
3.2 Reagents
gate the possibility of applying the most recent edi-
tions of the standards indicated below. Members of
Use only reagents of recognized analytical quality
IEC and IS0 maintain registers of currently valid
and only distilled, or deionized, water.
International Standards.
IS0 9454-l :1990, Soft solderhg f7uxes - Classitka-
3.2.1 Tetrabutyi ammonium hydroxide
tion and requirements - Part 1: Classification,
[(CH,CH,CH,CH,),N(OH)] 0,l M (0,l mol/l).
labelling and packaging.
Use a commercially available standard solution or
IS0 9455,1:1990, Soft soldering fluxes - Test meth- one prepared from a commercially available con-
Part 1: Determination of non-volatile matter, centrated standard solution by dilution with
ods -
propan-2-01 (3.2.2). Alternatively,
gravimetric method. prepare an
0,l mol/l tetrabutyl ammonium hydroxide solution
--I), by diluting commercial concentrated solution with
IS0 9455-2: Soft soldering f7uxes - Test methods
-
propan-2-ol and standardize this solution against an
Part 2: Determination of non-volatile matter,
accurately weighed amount of benzoic acid (about
ebulliomctric method.
-
1) To be published.
IS0 9455-3:1992(E)
0,5 g) dissolved in dimethylformamide, previously characteristics of the flux. Cover with a watch glass
neutralised to thymol blue.
and dissolve the flux by gentle agitation.
Place the beaker on the stand of the titration as-
3.2.2 Propan-2-01 [(CH,),CHOH], neutralized with
sembly with the electrodes, stirrer and burette in
tetrabutyl ammonium hydroxide solution (3.2.1) to a
position. Adjust the speed of the stirrer to give vig-
faint pink colour, using phenolphthalein as indicator.
orous stirring without splashing. Titrate with the
tetrabutyl ammonium hydroxide solution (3.2.1) add-
3.2.3 Ethanol (C,H,OH), anhydrous, neutralized
ing 1 ml portions and recording the pH, or mV meter
with tetrabutyl ammonium hydroxide solution (3.2.1)
readings after each addition. As the end-point is
to a fain
...