1、BRITISH STANDARD BS EN ISO 12224-2:1999 Flux cored solder wire Specificationand test methods Part 2: Determination of flux content The European Standard EN ISO12224-2:1999 has the status of a BritishStandard ICS 25.160.20BSENISO12224-2:1999 This BritishStandard, having been prepared under the direct
2、ionof the Engineering SectorCommittee, was publishedunder the authority ofthe Standards Committee andcomes into effect on 15June1999 BSI03-2000 ISBN 0 580 32335 8 National foreword This BritishStandard is the English language version of EN ISO12224-2:1999. It is identical with ISO12224-2:1997. Toget
3、her with BSEN12224-1 it supersedes BS441:1980 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee NFE/27, Tin and tin alloys, to Subcommittee NFE/27/4, Solders and soldering fluxes, which has the responsibility to: aid enquirers to understand the text; pr
4、esent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee
5、can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The BritishStandards which implement th
6、ese international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessar
7、y provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theENISOtit
8、le page, page2, the ISO title page, pagesii toiv, pages1 and2, aninsideback cover andaback cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication
9、 Amd. No. Date CommentsBSENISO12224-2:1999 BSI 03-2000 i Contents Page National foreword Inside front cover Foreword 2 Foreword iii Text of ISO12224-2 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO12224-2 March1999 ICS 25.160.20 English version Flux cored solder wire Specification
10、 and test methods Part2: Determination of flux content (ISO12224-2:1997) Fils dapport de brasage, pleins et flux incorpor Spcifications et mthodes dessai Partie2: Dtermination de la teneuren flux (ISO12224-2:1997) Flumittelgefllte Rhrenlote Festlegung und Prfverfahren Teil2: Bestimmung des Flumittel
11、gehalts (ISO12224-2:1997) This European Standard was approved by CEN on20February1999. 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
12、 and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 respons
13、ibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria. Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg. Nether
14、lands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means r
15、eserved worldwide for CEN national Members. Ref.No.ENISO12224-2:1999EENISO12224-2:1999 BSI 03-2000 2 Foreword The text of the International Standard from Technical Committee ISO/TC44 “Welding and allied processes” of the International Organization for Standardization (ISO) has been taken over as an
16、European Standard by Technical Committee CEN/TC121 “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 September1999, and conflicting national standa
17、rds shall be withdrawn at the latest by September1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland
18、, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and theUnitedKingdom. Endorsement notice The text of the International Standard ISO12224-2:1997 has been approved by CEN as a European Standard without any modification. NOTENormative references to International
19、Standards are listed in AnnexZA (normative).EN ISO 12224-2:1999 ii BSI 03-2000 Contents Page Foreword iii 1 Scope 1 2 Principle 1 3 Apparatus and materials 1 4 Procedure 1 4.1 Method A 1 4.2 Method B 1 5 Expression of results for both methods 1 6 Test report 2 Annex A (informative) Bibliography Insi
20、de back cover Descriptors: Soldering, solders, wire, tests, determination, determination of content, soldering fluxes.EN ISO 12224-2:1999 BSI 03-2000 iii Foreword ISO (the International Organisation for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
21、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-gover
22、nmental, 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 vo
23、ting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO12224-2 was prepared by Technical Committee ISO/TC44, Welding and allied processes, Subcommittee SC12, Soldering and brazing materials. ISO12224 consists of
24、the following parts, under the general title Solder wire, solid and flux cored Specification and test methods: Part1: Classification and performance requirements; Part2: Determination of flux content; Part3: Wetting balance test. Annex A of this part of ISO12224 is for information only.iv blankEN IS
25、O 12224-2:1999 BSI 03-2000 1 1 Scope This Part of ISO12224 specifies two methods for the determination of the flux content of a sample flux cored solder wire. 2 Principle A known mass of the sample of flux cored solder wire is melted, separated from the flux medium and weighed. The flux content is c
26、alculated and expressed as a percentage by mass of the original wire. 3 Apparatus and materials 3.1 Degreasing solvent, such as propan-2-ol or the solvent recommended by the manufacturer. 3.2 Balance, having an accuracy of 0,001g. 3.3 Porcelain crucible, capacity30ml. 3.4 Scraper, stainless. 3.5 Cru
27、cible tongs 3.6 Solder bath, containing solder, such as ISO9453, grade S-Sn60Pb40, maintained at a temperature of50 C 5 C above the liquidus temperature of the wire under test. 3.7 Tissues 3.8 Glycerol 3.9 Glass beaker, pyrex,100ml150ml. 4 Procedure Clean the sample length of the flux cored solder w
28、ire under test with a tissue(3.7) soaked in the degreasing solvent(3.1). Follow either method A or method B below. 4.1 Method A Carry out the test in duplicate. Using the balance(3.2) weigh50g5g of the cleaned wire to0,001g. Record the mass of the sample (m 1 ). Form the sample into a ball and trans
29、fer it to the cleaned crucible(3.3) or the beaker(3.9). Clean the surface of the molten solder in the solder bath(3.6) by means of the scraper(3.4). Holding the crucible or beaker with the tongs(3.5), partially immerse it in the solder bath(3.6), maintained at a temperature50 C 5 C above the liquidu
30、s temperature of the wire under test. Turn the crucible or beaker gently until the solder has melted into one pellet. Leave the crucible or beaker immersed in the solder bath for10s15s after the solder has melted. Remove the crucible or beaker from the solder bath and allow it to cool until the sold
31、er has just solidified. Pour off as much flux as possible while the flux remains warm. Remove the pellet from the crucible or beaker. Clean it thoroughly with degreasing solvent(3.1) to remove all traces of flux. Dry the pellet with a clean tissue(3.7). Using the balance(3.2) weigh the dry pellet to
32、 a constant weight to0,001g. Record the mass of the pellet (m 2 ). 4.2 Method B Carry out the test in duplicate. Using the balance(3.2) weigh30g2g of the cleaned wire to0,001g. Record the mass of the sample (m 1 ). Transfer the solder wire to the beaker(3.9) with sufficient glycerol(3.8) to cover th
33、e sample (approximately50ml of glycerol). Clean the surface of the molten solder in the solder bath(3.6) by means of the scraper(3.4). Holding the beaker with the tongs(3.5), partially immerse it in the solder bath(3.6), maintained at a temperature50 C 5 C above the liquidus temperature of the wire
34、under test. Turn the beaker until the solder has melted into one pellet. Leave the beaker immersed in the solder bath for10s15s after the solder has melted, while turning gently. Allow the solder to solidify and then decant as much of the flux/glycerol mixture as possible from the molten solder. All
35、ow the solder to cool and solidify. Remove the solder pellet and wash it in water. Clean it thoroughly with degreasing solvent(3.1) to remove all traces of flux. Dry the pellet with a clean tissue(3.7). Using the balance(3.2) measure the mass of the dry pellet to a constant weight, to0,001g (m 2 ).
36、NOTEIn cases of dispute. It is recommended that the method to be used be agreed between supplier and purchaser. 5 Expression of results for both methods Calculate the flux content of the sample wire as the percentage by mass, using the following formula: where m 1 is the mass, in grams, of the flux
37、cored solder wire used in the test; m 2 is the mass, in grams, of the solder pellet.EN ISO 12224-2:1999 2 BSI 03-2000 If the values of the two determinations differ by more than0,2%, the determination shall be repeated completely. Calculate the arithmetic mean of the two determinations. 6 Test repor
38、t The test report shall include the following information: a) the identification of the test sample; b) reference to this part of ISO12224; c) the test method used; d) the results obtained; e) any unusual features noted during the test; f) details of any operation not included in this part of ISO122
39、24, or regarded as optional.ENISO12224-2:1999 BSI 03-2000 Annex A (informative) Bibliography 1 ISO9453:1990, Soft solder alloys Chemical composition and forms.BS EN ISO 12224-2:1999 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsib
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