Soft soldering fluxes - Test methods - Part 2: Determination of non-volatile matter, ebulliometric method (ISO 9455-2:1993)

The method specified is based on evaporating a weighed amount of the flux sample in an ebulliometer until the entire volatile part is driven off, which is determined by following the graph of distillation temperature against time. The flux residue is considered as the non-volatile content of flux. Applies only to flux with a non-volatile content of 10 % or more.

Flußmittel zum Weichlöten - Prüfverfahren - Teil 2: Bestimmung nichtflüchtiger Stoffe, ebulliometrische Methode (ISO 9455-2:1993)

Dieser Teil von ISO 9455 legt eine ebulliometrische Methode für die Bestimmung nichtflüchtiger Stoffe in Flußmitteln für das Weichlöten fest. Sie ist auf die Flußmittellösungen der Klassen 1.1.1, 1.1.2 und 1.1.3 anwendbar, die in ISO 9454 Teil 1 definiert sind. Nur diese Flußmittel enthalten Lösemittel einer relativ hohen Flüchtigkeit, wie Isopropanol. Die Methode ist nur anwendbar auf Flußmittel mit einem nichtflüchtigen Festkörperanteil von mindestens 10%.

Flux de brasage tendre - Méthodes d'essai - Partie 2: Dosage des matieres non volatiles par ébulliométrie (ISO 9455-2:1993)

La présente partie de l'ISO 9455 prescrit une méthode ébulliométrique de détermination de la teneur en matières non volatiles des flux de brasage tendre. Elle est applicable aux flux liquides des classes 1.1.1, 1.1.2 et 1.1.3 définies dans l'ISO 9454-1, mais uniquement à ceux qui contiennent des solvants de volatilité relativement élevée, du type propanol-2. La méthode n'est applicable qu'aux flux dont la teneur en matières non volatiles est égale ou supérieure à 10 %.  
NOTE 1 Pour déterminer la teneur en matières non volatiles des flux liquides des classes indiquées, mais dont le solvant a une volatilité inférieure à celle du propanol-2, il convient d'utiliser la méthode indiquée dans l'ISO 9455-1.

Talila za mehko spajkanje - Preskusne metode - 2. del: Določevanje nehlapnih snovi z ebuliometrično metodo (ISO 9455-2:1993)

General Information

Status
Published
Publication Date
31-Jan-2001
Technical Committee
VAR - Welding
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Feb-2001
Due Date
01-Feb-2001
Completion Date
01-Feb-2001

Overview

SIST EN ISO 9455-2:2001 specifies a standardized test method for determining the non-volatile matter content in soft soldering fluxes using the ebulliometric method. This method applies to liquid soft solder fluxes-specifically those with non-volatile content of 10% or more and solvents with relatively high volatility (e.g., propan-2-ol). It is a crucial quality control technique employed in soldering and brazing industries to ensure flux consistency and performance.

The technique involves evaporating a precisely weighed flux sample in an ebulliometer until only the non-volatile residues remain. The volatile portion is removed by controlled heating, and the process is monitored by documenting the distillation temperature over time. This ensures exact measurement of the non-volatile fraction essential for reliable soldering results.

Key Topics

  • Scope: Applicable to classes 1.1.1, 1.1.2, and 1.1.3 liquid fluxes as classified by ISO 9454-1, containing solvents with high volatility.
  • Principle: Evaporation of flux sample in an ebulliometer; measuring non-volatile residues by weight.
  • Apparatus:
    • Martin ebulliometer equipped with spherical distillation flask
    • Thermostatically controlled heater
    • Precise laboratory thermometer or corrosion-resistant thermocouple
    • Analytical balance with 0.1 mg accuracy
  • Procedure:
    • Sample weighing (40-50 g) with high precision
    • Controlled evaporation at regulated heat, recording temperature and time
    • Constructing distillation curve to monitor complete removal of volatiles
    • Measuring residue mass after cooling and determining percentage of non-volatile matter
  • Precision:
    • Repeatability within laboratories: ±0.32% (m/m)
    • Reproducibility between laboratories: ±1.29% (m/m)
  • Calculation: Non-volatile content (%) = (Mass of residue / Mass of initial sample) × 100
  • Test Reporting includes sample identification, method reference, results, and any deviations or unusual observations.
  • Annex A provides a method to prepare standard reference fluxes with 25% non-volatile rosin content for verifying test accuracy.

Applications

  • Quality Control in Soldering: Ensures the consistency of soft soldering fluxes used in electronics, plumbing, and metal joining processes.
  • Materials Testing Laboratories: Validates flux properties for manufacturers and users to comply with industry standards.
  • Flux Formulation R&D: Enables formulation engineers to measure non-volatile components accurately, critical for flux activity and residue behavior.
  • Compliance and Certification: Helps manufacturers certify products according to international soldering and brazing quality requirements.

This method is vital for fluxes containing volatile solvents similar to or more volatile than propan-2-ol and is especially suited for fluxes with significant non-volatile content (≥10%).

Related Standards

  • ISO 9454-1: Classification and requirements of soft soldering fluxes.
  • ISO 9455-1: Non-volatile matter determination using gravimetric methods for fluxes with less volatile solvents.
  • ISO 4791-1: Vocabulary and terminology related to laboratory glass apparatus, including ebulliometers.
  • Other parts of the ISO 9455 series, covering acid value, copper mirror test, halide content, zinc content, flux efficacy, corrosion tests, and more.

Summary

SIST EN ISO 9455-2:2001 offers a reliable, reproducible, and internationally recognized method for determining non-volatile matter in soft soldering fluxes via an ebulliometric approach. The test guarantees precise flux characterization, critical to optimizing soldering quality and ensuring consistent industrial application performance. This standard supports manufacturers and laboratories in maintaining high-quality soldering consumables and supports adherence to global manufacturing norms.

Standard

SIST EN ISO 9455-2:2001

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Frequently Asked Questions

SIST EN ISO 9455-2:2001 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Soft soldering fluxes - Test methods - Part 2: Determination of non-volatile matter, ebulliometric method (ISO 9455-2:1993)". This standard covers: The method specified is based on evaporating a weighed amount of the flux sample in an ebulliometer until the entire volatile part is driven off, which is determined by following the graph of distillation temperature against time. The flux residue is considered as the non-volatile content of flux. Applies only to flux with a non-volatile content of 10 % or more.

The method specified is based on evaporating a weighed amount of the flux sample in an ebulliometer until the entire volatile part is driven off, which is determined by following the graph of distillation temperature against time. The flux residue is considered as the non-volatile content of flux. Applies only to flux with a non-volatile content of 10 % or more.

SIST EN ISO 9455-2:2001 is classified under the following ICS (International Classification for Standards) categories: 25.160.50 - Brazing and soldering. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN ISO 9455-2:2001 is associated with the following European legislation: EU Directives/Regulations: 97/23/EC; Standardization Mandates: M/071. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

SIST EN ISO 9455-2:2001 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-februar-2001
7DOLOD]DPHKNRVSDMNDQMH3UHVNXVQHPHWRGHGHO'RORþHYDQMHQHKODSQLK
VQRYL]HEXOLRPHWULþQRPHWRGR ,62
Soft soldering fluxes - Test methods - Part 2: Determination of non-volatile matter,
ebulliometric method (ISO 9455-2:1993)
Flußmittel zum Weichlöten - Prüfverfahren - Teil 2: Bestimmung nichtflüchtiger Stoffe,
ebulliometrische Methode (ISO 9455-2:1993)
Flux de brasage tendre - Méthodes d'essai - Partie 2: Dosage des matieres non volatiles
par ébulliométrie (ISO 9455-2:1993)
Ta slovenski standard je istoveten z: EN ISO 9455-2:1995
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 Is0
STANDARD 9455-2
First edition
1993-04-I 5
Soft soldering fluxes - Test methods -
Part 2:
Determination of non-volatile matter,
ebulliometric method
Flux de brasage tendre - M&hodes d’essai -
Partie 2: Dosage des mat&es non volatiles par 6bulliom6 trie
Reference number
IS0 9455-Z: 1993(E)
IS0 9455-Z: 1993(E)
Foreword
IS0 (the International Organization for Standardizat ion) is a worldw ‘ide
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, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) 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 IS0 9455-2 was prepared by Technical Committee
ISO/TC 44, Welding and allied processes, Sub-Committee SC 12,
Soldering and brazing materials.
IS0 9455 consists of the following parts, under the general title Soft
soldering fluxes - Test methods:
- Part 7: Determination of non-volatile matter, gravimetric method
- Part 2: Determination of non-volatile matter, ebulliometric method
- Part 3: Determination of acid value, po ten tiome tric and visual
titration methods
- Part 5: Copper mirror test
- Part 6: De termination of halide content
- Part 8: Determination of zinc content
- Part 9: Determination of ammonia content
- Part ? 0: Flux efficacy tests, solder spread method
- Part 7 7: Solubility of flux residues
0 IS0 1993
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 per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
IS0 9455-2: 1993(E)
- Part 12: Steel tube corrosion test
- Part 13: Determination of flux spattering
- Part 14: Assessment of tackiness of flux residues
- Part 15: Copper corrosion test
- Part 16: Flux efficacy tests, wetting balance method
[Technical Report]
- Part 17: Determination of surface insulation resistance of flux resi-
dues (Comb test)
- Part 18: Electrochemical migration test for flux residues
Annex A of this part of IS0 9455 is for information only.

This page intentionally left blank

~~~
INTERNATIONAL STANDARD IS0 9455-2: 1993(E)
- Test methods -
Soft soldering fluxes
Part 2:
Determination of non-volatile matter, ebulliometric method
1 Scope 3 Principle
This part of ISQ 9455 specifies an ebulliometric A weighed amount of the flux sample is evaporated
method for the determination of the content of non- in an ebulliometer until the entire volatile part is driven
volatile matter in soft soldering fluxes. It is applicable off, which is determined by following the graph of
to liquid fluxes of classes 1 .I .I, 1 .I .2 and 1 .I .3, as distillation temperature against time. The flux residue
is considered as the non-volatile content of flux.
defined in IS0 9454-1, and only those fluxes contain-
ing solvents of relatively high volatility, such as
propan-2-01. The method is applicable only to fluxes
with a non-volatile content of 10 % or more.
NOTE 1 For the determination of the content of non-
4 Apparatus
volatile matter of liquid fluxes of these classes, where the
solvent has a lower volatility than propan-2-01, the method
Usual laboratory apparatus and, in particular, the fol-
given in IS0 9455-l should be used.
lowing.
4.1 Martin ebulliometer (IS0 4791-1:1985,
2 Normative references
5.04.10), but with a spherical distillation flask, as
shown in figure 1.
The following standards contain provisions which,
through reference in this text, constitute provisions
NOTE 2 It has been found that better heat exchange
of this part of IS0 9455. At the time of publication, the
characteristics are obtained between the heater and the
editions indicated were valid. All standards are subject
distillation flask if a spherical flask is used rather than the
to revision, and parties to agreements based on this
pear-shaped flask normally supplied with the Martin
part of IS0 9455 are encouraged to investigate the
ebulliometer.
possibility of applying the most recent editions of the
standards indicated below. Members of IEC and IS0
maintain registers of currently valid International
4.2 Thermostatically controlled heater, suitable
Standards.
for heating the distillation flask of the ebulliometer.
IS0 4791-I : 1985, Laboratory apparatus - Vocabulary
relating to apparatus made essentially from glass,
4.3 Laboratory thermometer, covering the range
porcelain or vitreous silica - Part 1: Names for items
50 “C to 150 O
...

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