1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 9455-16:2013Soft soldering fluxes TestmethodsPart 16: Flux efficacy test, wetting balancemethod (ISO 9455-16:2013)BS EN ISO 9455-16:2013 BRITISH STANDARDNational forewo
2、rdThis British Standard is the UK implementation of EN ISO9455-16:2013. It supersedes BS EN ISO 9455-16:2001 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee NFE/27/4, Solders and soldering fluxes.A list of organizations represented on this committee can
3、beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 69808 8ICS 25.160.50Compliance
4、 with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9
5、455-16 April 2013 ICS 25.160.50 Supersedes EN ISO 9455-16:2001English Version Soft soldering fluxes - Test methods - Part 16: Flux efficacy test, wetting balance method (ISO 9455-16:2013) Flux de brasage tendre - Mthodes dessai - Partie 16: Essai defficacit du flux, mthode la balance de mouillage (I
6、SO 9455-16:2013) Flussmittel zum Weichlten - Prfverfahren - Teil 16: Bestimmung der Wirksamkeit des Flussmittels, Verfahren zur Messung der Benetzungskraft (ISO 9455-16:2013) This European Standard was approved by CEN on 2 February 2013. CEN members are bound to comply with the CEN/CENELEC Internal
7、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
8、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 version
9、s. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol
10、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form
11、 and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 9455-16:2013: EBS EN ISO 9455-16:2013EN ISO 9455-16:2013 (E) 3 Foreword This document (EN ISO 9455-16:2013) has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes“ in collaboration with Technical
12、 Committee CEN/TC 121 “Welding” 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 October 2013, and conflicting national standards shall be withdrawn at the
13、latest by October 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 9455-16:2001. According to the
14、 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu
15、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 9455-16:2013 has been approved by CEN as EN ISO 9455-16:2013 without
16、 any modification. BS EN ISO 9455-16:2013ISO 9455-16:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Symbols 14 Principle 25 Reagents 26 Apparatus . 27 Test pieces . 38 Procedure. 38.1 Preparation of the test pieces. 38.2 Test method . 39 Referenc
17、e value using standard flux 410 Presentation of results . 411 Calculation and expression of results . 612 Test report . 7Annex A (normative) Method for the preparation of standard rosin (colophony) based liquid fluxes having 25 % (by mass) non-volatile content . 8Annex B (normative) Method for the p
18、roduction of test pieces with a controlled-contaminated surface for the wetting balance test (artificial sulfidation method) .10BS EN ISO 9455-16:2013ISO 9455-16:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member
19、 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
20、 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.International Standards are drafted in accordance with the rules given in the ISO/IEC Directive
21、s, Part 2.The main task of technical committees is to prepare International Standards. 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 ca
22、sting a vote.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.ISO 9455-16 was prepared by Technical Committee ISO/TC 44, Welding and allied processes,
23、Subcommittee SC 12, Soldering materials.This second edition cancels and replaces the first edition (ISO 9455-16:1998), which has been technically revised.ISO 9455 consists of the following parts, under the general title Soft soldering fluxes Test methods: Part 1: Determination of non-volatile matter
24、, 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
25、 content Part 9: Determination of ammonia content Part 10: Flux efficacy test, solder spread method Part 11: Solubility of flux residues Part 13: Determination of flux spattering Part 14: Assessment of tackiness of flux residues Part 15: Copper corrosion test Part 16: Flux efficacy test, wetting bal
26、ance method Part 17: Surface insulation resistance comb test and electrochemical migration test of flux residuesRequests for official interpretations of any aspect of this part of ISO 9455 should be directed to the Secretariat of ISO/TC 44/SC 12 via your national standards body. A complete listing o
27、f these bodies can be found at www.iso.org.iv ISO 2013 All rights reservedBS EN ISO 9455-16:2013INTERNATIONAL STANDARD ISO 9455-16:2013(E)Soft soldering fluxes Test methods Part 16: Flux efficacy test, wetting balance method1 ScopeThis part of ISO 9455 specifies a method for the assessment of the ef
28、ficacy 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
29、 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 prep
30、aring the surface of the test piece are included in the present method.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
31、ocument (including any amendments) applies.ISO 9453, Soft solder alloys Chemical compositions and formsISO 9454-1, Soft soldering fluxes Classification and requirements Part 1: Classification, labelling and packagingIEC 60068-2-20:2008, Environmental testing Part 2-20: Tests Test T: Test methods for
32、 solderability and resistance to soldering heat of devices with leadsIEC 60068-2-54, Environmental testing Part 2-54: Tests Test Ta: Solderability testing of electronic components by the wetting balance methodIEC 60068-2-78:2001, Environmental testing Part 2-78: Tests; Test Cab: Damp heat, steady st
33、ate3 Symbolsd depth of immersion, in millimetres, of the test piece below the undisturbed solder levelA cross sectional area, in square millimetres, of the test piece at the solder line density, in grams per millilitre, of the solder under test at the test temperatureF wetting force, in millinewtons
34、t0time at which the test piece first makes contact with the surface of the liquid solder in the batht1time at which the solder starts to wet the test piece (point A, see Figure 1), at which point the trace begins to fallt2time at which the recorded force is equal to the upward force due to buoyancyt
35、3time at which the trace crosses the reference line ISO 2013 All rights reserved 1BS EN ISO 9455-16:2013ISO 9455-16:2013(E)4 PrincipleThe efficacy of the liquid flux under test is compared with that of a standard liquid flux, using a wetting balance in conjunction with a specified test piece, approp
36、riate to the class of flux under test.5 ReagentsUse only reagents of recognized analytical quality and only distilled or deionized water.5.1 Acid cleaning solution, prepared as follows:Add cautiously, while stirring, 75 ml of sulfuric acid ( = 1,84 g/ml) to 210 ml of water and mix. Cool the solution
37、 to room temperature. Add 15 ml of nitric acid ( = 1,42 g/ml) and mix thoroughly.5.2 Acetone.5.3 Propan-2-ol, complying with the following requirements: propan-2-ol: 99,5 % (by mass) minimum; acid content: 0,002 % (by mass) maximum; non-volatile content: 0,2 % (by mass) maximum.Isopropyl alcohol (al
38、so propan-2-ol, 2-propanol or the abbreviation IPA) is a common name for this chemical compound, which has the molecular formula C3H8O.6 ApparatusUsual laboratory apparatus and, in particular, the following.6.1 Wetting balance and ancillary instrumentation, as described in IEC 60068-2-54.Calibrate t
39、he apparatus in accordance with the manufacturers instructions.6.2 Solder bath.As a minimum, the bath temperature shall be capable of being maintained at a temperature corresponding to the liquidus temperature of the alloy under test plus 35 C. The test temperature shall be reported in the test repo
40、rt.The dimensions of the solder bath shall be such that no portion of the test piece (see Clause 7) 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.The solder used for the test and the test temperature shall be one of the follo
41、wing: Sn60Pb40 (see ISO 9453) at 235 C 3 C; Sn96,5Ag3,0Cu0,5 (see ISO 9453) at 255 C 3 C; any other solder and temperature combinations as agreed between the customer and the flux supplier.6.3 Acid-free filter paper.2 ISO 2013 All rights reservedBS EN ISO 9455-16:2013ISO 9455-16:2013(E)7 Test pieces
42、The test pieces shall be made of copper.EXAMPLE Test pieces are cut from a rectangular copper sheet. The dimensions of each test piece are as follows: width: 10,0 mm 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.Whe
43、n testing fluxes of type 1 or 2 (as defined in ISO 9454-1), full details of the test pieces shall be given in the test report.The sheet or other article 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 cl
44、eanly without leaving significant burrs.8 Procedure8.1 Preparation of the test pieces8.1.1 CleaningThe test pieces shall be handled with clean tongs throughout. Select sufficient test pieces (see Clause 7) to allow 10 per test flux and 10 per standard flux. Degrease them in acetone (5.2) and allow t
45、o dry. Immerse them for 20 s in the acid cleaning solution (5.1) at room temperature. Remove the test pieces from the acid cleaning solution and wash for about five seconds under running tap water. Rinse with distilled or deionized water then acetone (5.2) and dry with acid-free filter paper (6.3).I
46、f required, the test pieces may be stored in acetone after rinsing them in deionized water. When needed, they shall be removed from the acetone and dried with acid-free filter paper (6.3).Subject all the test pieces to one of the ageing procedures given in 8.1.2 to 8.1.4 as agreed between the flux s
47、upplier and the customer.8.1.2 Ageing the surface by sulfidation processCarry out the procedure given in Annex B on all the cleaned test pieces (see 8.1.1).8.1.3 Steam ageing the surfaceCarry out the steam ageing procedure given in IEC 60068-2-20:2008, 4.1.1, ageing procedure 1b, for a period of 4 h
48、 on all the cleaned test pieces (see 8.1.1).8.1.4 Damp-heat, steady-state ageingSubject all the cleaned pieces (see 8.1.1) to the test chamber conditions specified in IEC 60068-2-78:2001, Clause 4, for a period selected from 1 h, 4 h or 24 h.8.2 Test method8.2.1 Carry out the following test procedur
49、e on each of the 10 test pieces. Complete all 10 tests within 45 min of the preparation stage (see 8.1). ISO 2013 All rights reserved 3BS EN ISO 9455-16:2013ISO 9455-16:2013(E)8.2.2 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 C 3 C or 255 C 3 C (see 6.2).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 com
