SIST EN 62739-3:2018
(Main)Test method for erosion of wave soldering equipment using molten lead-free solder alloy - Part 3: Selection guidance of erosion test method
Test method for erosion of wave soldering equipment using molten lead-free solder alloy - Part 3: Selection guidance of erosion test method
This part of IEC 62739 describes the selection methodology of an appropriate evaluating test
method for the erosion of the metal materials without or with surface processing intended to
be used for lead-free wave soldering equipment as a solder bath and other components which
are in contact with the molten solder.
Verfahren zur Erosionsprüfung für Wellenlötausrüstungen bei Verwendung von geschmolzener, bleifreier Lotlegierung - Teil 3: Leitfaden für die Auswahl von Verfahren zur Erosionsprüfung
Méthode d'essai de l'érosion de l'équipement de brasage à la vague utilisant un alliage à braser sans plomb fondu - Partie 3: Document d'orientation pour le choix des méthodes d'essai d'érosion
L’IEC 62739-3:2017 décrit la méthodologie de sélection d’une méthode d'essai appropriée pour évaluer l'érosion des matériaux métalliques sans ou avec traitement de surface, destinés à être utilisés comme bain de brasure pour les équipements de brasage à la vague sans plomb, ainsi que l'érosion d'autres composants qui entrent en contact avec la brasure fondue.
Preskusna metoda za opremo za valovno spajkanje, ki uporablja staljeno spajkalno zlitino brez svinca - 3. del: Napotki za izbiro metod z erozijskim preskušanjem
Ta del standarda IEC 62739 opisuje metodologijo za izbiro ustrezne preskusne metode za erozijo kovinskih materialov z ali brez površinske obdelave, ki so namenjeni uporabi z opremo za valovno spajkanje, ki uporablja staljeno spajkalno zlitino brez svinca, in drugimi komponentami, ki so v stiku s staljeno spajkalno zlitino.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 62739-3:2018
01-januar-2018
Preskusna metoda za opremo za valovno spajkanje, ki uporablja staljeno
spajkalno zlitino brez svinca - 3. del: Napotki za izbiro metod z erozijskim
preskušanjem
Test method for erosion of wave soldering equipment using molten lead-free solder alloy
- Part 3: Selection guidance of erosion test method
Ta slovenski standard je istoveten z: EN 62739-3:2017
ICS:
25.160.50 Trdo in mehko lotanje Brazing and soldering
SIST EN 62739-3:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 62739-3:2018
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SIST EN 62739-3:2018
EUROPEAN STANDARD EN 62739-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2017
ICS 31.190; 31.240
English Version
Test method for erosion of wave soldering equipment using
molten lead-free solder alloy - Part 3: Selection guidance of
erosion test methods
(IEC 62739-3:2017)
Méthode d'essai de l'érosion de l'équipement de brasage à Verfahren zur Erosionsprüfung für Wellenlötausrüstungen
la vague utilisant un alliage à braser sans plomb fondu - bei Verwendung von geschmolzener, bleifreier Lotlegierung
Partie 3: Document d'orientation pour le choix des - Teil 3: Leitfaden für die Auswahl von Verfahren zur
méthodes d'essai d'érosion Erosionsprüfung
(IEC 62739-3:2017) (IEC 62739-3:2017)
This European Standard was approved by CENELEC on 2017-02-10. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62739-3:2017 E
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SIST EN 62739-3:2018
EN 62739-3:2017
European foreword
The text of document 91/1368/CDV, future edition 1 of IEC 62739-3, prepared by IEC/TC 91
"Electronics assembly technology" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62739-3:2017.
The following dates are fixed:
(dop) 2017-11-10
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-02-10
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62739-3:2017 was approved by CENELEC as a European
Standard without any modification.
2
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SIST EN 62739-3:2018
EN 62739-3:2017
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year
IEC 60068-2-20 2008 Environmental testing - EN 60068-2-20 2008
Part 2-20: Tests - Test T: Test methods for
solderability and resistance to soldering
heat of devices with leads
IEC 61190-1-3 - Attachment materials for electronic EN 61190-1-3 -
assembly -
Part 1-3: Requirements for electronic grade
solder alloys and fluxed and non-fluxed
solid solders for electronic soldering
applications
IEC 62739-1 2013 Test method for erosion of wave soldering EN 62739-1 2013
equipment using molten lead-free solder
alloy -
Part 1: Erosion test method for metal
materials without surface processing
IEC 62739-2 - Test method for erosion of wave soldering EN 62739-2 -
equipment using molten lead-free solder
alloy -
Part 2: Erosion test method for metal
materials with surface processing
3
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SIST EN 62739-3:2018
IEC 62739-3
®
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
Test method for erosion of wave soldering equipment using molten lead-free
solder alloy –
Part 3: Selection guidance of erosion test methods
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.190; 31.240 ISBN 978-2-8322-3769-4
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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SIST EN 62739-3:2018
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CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General remarks . 7
5 Selection of the appropriate erosion test method . 8
5.1 Correlation between test methods and stresses induced in the field . 8
5.2 Recommended test method by materials . 9
6 Common items for each test method . 10
6.1 Specimen preparation . 10
6.2 Solder alloy . 10
6.3 Accelerated stress conditions. 10
6.3.1 Test temperature . 10
6.3.2 Rotation speed . 10
6.3.3 Bending stress to the specimen . 11
6.4 Dross . 11
6.4.1 Dross generation and removal interval . 11
6.4.2 Dross removal method . 11
6.4.3 Molten solder volume after dross removal . 11
6.5 Erosion depth measurement method . 11
6.5.1 Post test treatment . 11
6.5.2 Local erosion depth . 12
6.5.3 General (uniform) erosion depth . 13
6.5.4 Evaluation . 14
7 Overview of the test methods . 14
7.1 Test methods . 14
7.2 Metal material without surface processing . 14
7.2.1 General . 14
7.2.2 Rotation test at 350 °C . 15
7.3 Metal material with surface processing. 16
7.3.1 Test method . 16
7.3.2 Rotation test at 450 °C . 16
7.3.3 Rotation test at 450 °C with 2 mm bending . 17
Annex A (informative) Selection of test temperature, test duration and bending stress . 18
A.1 Specimen without surface processing . 18
A.2 Specimen with surface processing . 20
Annex B (informative) Maximum depth and other measurements . 23
B.1 General . 23
B.2 Maximum depth measurement . 23
Annex C (informative) Erosion mechanism . 26
C.1 Specimen without surface processing . 26
C.2 Specimen with surface processing . 26
C.3 Further guidance . 27
Annex D (informative) Thermal acceleration for erosion . 28
D.1 Specimen without surface processing . 28
D.2 Specimen with surface processing . 28
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D.3 Further guidance document . 30
Bibliography . 31
Figure 1 – Schematic example of wave soldering equipment . 8
Figure 2 – Example of dross removal tool . 11
Figure 3 – Schematic general definition of erosion depth . 12
Figure 4 – Schematic definition of erosion depth by focal depth method . 12
Figure 5 – Examples of local erosion . 13
Figure 6 – Example of evaluation region . 13
Figure 7 – Examples with non-erosion area . 14
Figure 8 – Examples without a non-erosion area and an example of a cross section . 14
Figure 9 – Configuration example of test equipment. 15
Figure 10 – Configuration example of test equipment for rotation test at 450 °C with 2
mm bending . 17
Figure A.1 – Specimen configuration for preliminary test . 18
Figure A.2 – Erosion depth against molten solder temperature . 19
Figure A.3 – Erosion depth against rotation speed . 19
Figure A.4 – Erosion depth against immersion time . 20
Figure C.1 – Erosion mechanism for material with nitriding . 27
Figure D.1 – Tin (Sn) diffusion layer growth in the plasma nitriding layer for various
stainless steel . 29
Table 1 – Location of erosion in the field and examples of problems . 8
Table 2 – Correlation between test methods and stresses induced in the field . 9
Table 3 – Applicable test method depending on the materials . 9
Table 4 – Test conditions for rotation test at 350 °C . 16
Table 5 – Test conditions for rotation test at 350 °C . 16
Table A.1 – Erosion test results for the materials of gas nitriding and nitrocarburizing . 21
Table A.2 – Erosion test results for the materials of coating type surface processing . 22
Table B.1 – Measurement methods, features and accuracy. 24
Table B.2 – Example of measurement equipment. 25
Table D.1 – Plasma nitriding layer peeling off period (incubation period in Figure D.1) . 29
Table D.2 – Initial growth rate for tin (Sn) diffusion layer . 30
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TEST METHOD FOR EROSION OF WAVE SOLDERING
EQUIPMENT USING MOLTEN LEAD-FREE SOLDER ALLOY –
Part 3: Selection guidance of erosion test methods
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62739-3 has been prepared by IEC technical committee 91:
Electronics assembly technology.
The text of this International Standard is based on the following documents:
The text of this standard is based on the following documents:
CDV Report on voting
91/1368/CDV 91/1400/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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SIST EN 62739-3:2018
IEC 62739-3:2017 © IEC 2017 – 5 –
A list of all the parts in the IEC 62739 series, under the general title Test method for erosion
of wave soldering equipment using molten lead-free solder alloy, can be found on the IEC
website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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TEST METHOD FOR EROSION OF WAVE SOLDERING
EQUIPMENT USING MOLTEN LEAD-FREE SOLDER ALLOY –
Part 3: Selection guidance of erosion test methods
1 Scope
This part of IEC 62739 describes the selection methodology of an appropriate evaluating test
method for the erosion of the metal materials without or with surface processing intended to
be used for lead-free wave soldering equipment as a solder bath and other components which
are in contact with the molten solder.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60068-2-20:2008, Environmental testing – Part 2-20: Tests – Test T: Test methods for
solderability and resistance to soldering heat of devices with leads
IEC 61190-1-3, Attachment materials for electronic assembly – Part 1-3: Requirements for
electronic grade solder alloys and fluxed and non-fluxed solid solder for electronic soldering
applications
IEC 62739-1:2013, Test method for erosion of wave soldering equipment using molten lead-
free solder alloy – Part 1: Erosion test method for metal materials without surface processing
IEC 62739-2, Test method for erosion of wave soldering equipment using molten lead-free
solder alloy – Part 2: Erosion test method for metal materials with surface processing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
erosion
phenomenon where a base material is dissolved and made thinner by coming into contact with
molten solder
[SOURCE: IEC 62739-1:2013, 3.1]
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IEC 62739-3:2017 © IEC 2017 – 7 –
3.2
lead-free solder
alloy that does not contain more than 0,1 % mass fraction of lead (Pb) as its constituent and
used for joining components to substrates or for coating surfaces
[SOURCE: IEC 60194:2015, 75.1904 modified – "mass fraction" is used instead of "weight"
and "as its constituent" has been added]
3.3
dross
oxide and other contaminants that form on the surface of molten solder
[SOURCE: IEC 60194:2015, 75.0410]
4 General remarks
Figure 1 shows a schematic example of wave soldering equipment showing a solder bath and
auxiliaries which are subjected to evaluation. Table 1 shows the location of the erosion in the
field, and an example of the problems. The tests specified in IEC 62739-1 and IEC 62739-2
are intended to provide an appropriate maintenance inspection cycle and replacement period
of a solder bath and other metal components, by assessing the anti-erosion capability of
material and other metal components, including surface processing, subjected to solder baths.
Except for the duration, test conditions such as molten solder temperature and rotation speed,
specified in IEC 62739-1 and IEC 6273-2, are predetermined. Thus, the erosion occurrence
durations vary depending upon the type of metal and the surface processing employed. For
this reason, an adequate test duration needs to be pre-set so as to clearly identify the non-
erosion which is used as the baseline of the erosion depth by the focal depth method and
which is also used to discriminate the type of metal and surface processing employed by
erosion depth on the specimen.
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2 3 4
6
1
7
9
8
5
10
5 IEC
Key
1 Jet stream nozzle 6 Impeller shaft
2 Drive belt 7 Molten solder pump
3 Temperature sensor 8 Impeller
4 Motor 9 Heater
5 Molten solder 10 Solder bath
Molten solder flow directions are indicated by an arrow.
Figure 1 – Schematic example of wave soldering equipment
Table 1 – Location of erosion in the field
and examples of problems
Location of erosion in the field Example of problems
Solder bath inner wall Hole, molten solder leaking
Impeller shaft Thinning, impeller shaft breaking
Molten solder pump components such as impeller Soldering defects due to molten solder jet stream
disturbance
Jet stream nozzle Soldering defects due to molten solder jet stream
disturbance
Temperature sensor tube Hole, unintentional molten solder temperature,
insulation failure
Throw-in heater Hole insulation failure, electricity leak
5 Selection of the appropriate erosion test method
5.1 Correlation between test methods and stresses induced in the field
Table 2 shows the correlation between test methods and stresses induced in the field,
indicating the applicable material.
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Table 2 – Correlation between test methods and stresses induced in the field
Test method Accelerated stress Applicable material Stress induced in the
(Applicable standard) conditions field
a
Rotation test at 350 °C High temperature (350 °C) Metal material without Assuming encroach due to
(IEC 62739-1) surface processing solid metal fusion by high
Molten lead-free solder
temperature molten lead-
flow
free solder.
Flux application
Assuming encroach due to
chemical erosion by flux.
b
Rotation test at 450 °C High temperature (450 °C) Metal material with surface Assuming encroach due to
(IEC 62739-2) processing solid metal fusion by high
Molten lead-free solder
temperature molten lead-
flow
free solder.
Rotation test at 450 °C High temperature (450 °C) Metal material with surface Assuming encroach due to
c
with 2 mm bending processing solid metal fusion by high
Molten lead-free solder
(IEC 62739-2) temperature molten lead-
flow
free solder.
Bent stress (2 mm)
Assuming encroach
acceleration by bending
stress on the metal surface
with surface processing.
a
This test method is conducted at a suitable temperature for metal material without surface processing to
produce appropriate erosion depth measurements. However, a sufficient test duration for each metal material
shall be predefined. For metal material with surface processing, erosion occurrence duration becomes too
long. Thus, this test method is not applicable for metal material with surface processing.
b
This test method is conducted at a suitable temperature for metal material with surface processing to enable
an appropriate erosion depth measurement. However, a sufficient test duration for each surface processing
shall be predefined. For metal material without surface processing, erosion progresses so fast that a non-
erosion area which is used for the baseline of the erosion depth cannot be obtained. Thus, this test method is
not applicable for metal material without surface processing.
c
This test method is suitable for metal material with surface processing when the rotation test at 450 °C takes
too long and additional acceleration is required. However, a sufficient test duration for each surface
processing shall be predefined. For metal material without surface processing, erosion progresses so fast that
a non-erosion area which is used for the baseline of the erosion depth cannot be obtained. Thus, this test
method is not applicable for metal material without surface processing.
5.2 Recommended test method by materials
Table 3 shows an appropriate test method depending on the material used with respect to
solder baths and auxiliaries.
Table 3 – Applicable test method depending on the materials
Metal materials and surface processing Applicable acceleration test method
Metal material Surface processing Rotation test at Rotation test at Rotation test at
350 °C 450 °C 450 °C with 2 mm
bending
SUS304 None A B B
SUS316 None A B B
Titan None A B B
Cast iron None A B B
SUS304, SUS316 Surface diffusion type B A A
SUS304, SUS316 Coating type B A A
“A” denotes recommended. “B ” denotes not applicable.
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Surface processing is classified as surface diffusion type which is forming a surface process
layer by diffusing nitrogen (for example) into material and coating type which is forming a
coating layer on the surface of the mater material. Examples of each type are given below.
a) Surface diffusion type: nitrogen supersaturated solid solution diffusion treatment, diffusion
penetration nitriding, gas nitriding, nitrocarburizing, plasma nitriding
b) Coating type: fine ceramic coating by chemical densified process, CrN coating by a
Physical Vapor Deposition (PVD) method, and alumina coating by thermal spray.
NOTE The erosion mechanism of the test is explained in Annex C.
6 Common items for each test method
6.1 Specimen preparation
The specimens shall be prepared as indicated below.
a) Basically, specimen shaping shall be carried out by punching, using a press machine.
However, for high hardness materials such as titan and cast iron which are not suitabl
...
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