1、 STD-BSI BS EN IS0 12224-2-ENGL 1799 1b24bb9 0782844 TI3 BRITISH STANDARD _ I_ Flux cored solder wire - Specification and test methods - Part 2: Determination of flux content The European Standard EN IS0 12224-2:1999 has the status of a Bri! - present to the responsible internationaVEuropean committ
2、ee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; them in the UK. - monitor related international and European developments and promulgate A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-re
3、ferences Attention is drawn to the fact that CEN and CENELEC Standarch normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be fo
4、und in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index“, or by ushg the “Find“ facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standasc
5、h 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 Gide front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, page ii, pa
6、ges 1 to 4, an inside back cover and a back cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 12224-2 March 1999 ICs 25.160.20 English version Flux cored solder wire - Specification and test methods - Part 2: Determination of flux content (IS0 12224-2:1997) Fils dapport de brasage, ple
7、ins et B flux incorpor - Spbcificationc et mthodes dessai - Partie 2: Dtermination de la teneur en flux (IS0 12224-2:1997) Flurnielgefllte Rhrenlote - Festiegung und Prfverfahren - Teil 2: Bestimmung des Flumittelgehalts (IS0 12224-2:1997) This European Standard was approved by CEN on 20 February 19
8、99. CEN members are bound to compiy with the CENICENELEC Internal Reguiatiom which stipulate aie 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 o
9、n application to the Central Secretariat or to any CEN member. This European Standard exists in three officiai 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 Central Secretaria
10、t has the same status as the offldal versions. CEN members are the national standards bodies of Austna. Belgium. Czech Republic. Denmark, Finland. France, Germany, Greece, Iceland. Ireland. Italy. Luxembourg. Netheriands. Nomay. Portugal. Spain. Sweden, Switzerand and United Kingdom. I I W( )PL COYM
11、iiTEE FOR SANDARDGTION (t 1 U I T E i: c R 0 PB EN D E NOR M A LI SA TI ON I lROP4ISCtiES KOMITEE FOR NORMUNG Central Secretariat: rue de Stfissait. 36 8-1050 Brussels Q 1999 CEN All nghts of exploitation in any form and by any means resewed worldwide for GEN national Members. Ref. No. EN IS0 12224-
12、21999 E _ STD-BSI BS EN IS0 L2224-2-ENGL 1999 W Lb24bb9 0782847 742 j EN IS0 12224-2:1999 Foreword The text of the Intemational Standard from Technical Committee ISO/TC 44 “Welding and allied processes“ of the Intemational Organization for Standardization (SO) has been taken over as an European Stan
13、dard by Technical Committee CEN/TC 121 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 September 1999, and conflicting national standards shall be
14、 withdrawn at the latest by September 1999. According to the CENCENELEC Intemal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I
15、taly, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the Intemational Standard IS0 12224-21997 has been approved by CEN as a European Standard without any modification. NOTE: Normative references to Intemational Standards
16、are listed in annex ZA (normative). STD-BSI BS EN IS0 LZi2?4-2-ENGL 1999 W L024bb3 U782848 b89 m EN IS0 12224-2:1999 INTERNATIONAL STANDARD IS0 12224-2 First edition 1 997-1 2-1 5 Flux cored solder wire - Specification and test methods - Part 2: Determination of flux content fils d?apport d8 brasage
17、, pleins et flux incorpor - Spcfications et mthodes d?essai - Patfie 2: Dtermination de la teneur en flux Reference number IS0 12224-2: 1 997( E) STD-BSI BS EN IS0 122211-2-ENGL 1717 m Ib24bb9 078213117 515 W EN IS0 12224-2:1999 Foreword IS0 (the International Organisation for Standardization) is a
18、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
19、 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 (IEC) on all matters of electrotechnical standardization. Draft International Standards ado
20、pted 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. Internationai Standard IS0 12224-2 was prepared by Technical Committee ISORC 44, Welding und allied proces
21、ses, Subcommittee SC 12, Soldering and brazing materials. IS0 12224 consists of the following parts, under the general title Solder wire, solid andflux cored - Specification and test methods: - Part I : Classification and performance requirements - Part 2: Determination offlux content - Part 3: Wett
22、ing balance test Annex A of this part of IS0 12224 is for information only. Descriptors: sddering, solders, wire, tests, determination, determination of content, soldering fluxes. ii STD-BSI BS EN IS0 12224-2-ENGL 1999 0 Lb24bb7 0782850 237 m EN IS0 12224-2:1999 Flux cored solder wire - Specificatio
23、n and test methods - Part 2: Determination of flux content 1 scope This Pari of IS0 12224 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
24、 weighed. The flux content is calculated and expressed as a percentage by mass of the original wire. 3 Apparatus and materials 3.1 Degreasing solvent, such as propan-2-01 or the solvent recommended by the manufacturer. 3.2 Balance, having an accuracy of it 0,001 g. 3.3 Porcelain crucible, capacity 3
25、0 mi. 3.4 Scraper, stainless. 3.5 Crucible tongs 3.6 Solder bath, containing solder, such as IS0 9453, grade S-Sn60Pb40, maintained at a temperature of 50 “C I5 “C above the liquidus temperature of the wire under test. 3.7 Tissues 3.8 Glycerol 3.9 Glass beaker, pyrex, 100 mi - 150 mi. 1 4 Procedure
26、Clean the sample length of the flux cored solder wire 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) weigh 50 g f 5 g of the cleaned wire to 0,001 g. Record the mas
27、s of the sample (mi). Form the sample into a ball and transfer 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
28、bath (3.6), maintained at a temperature 50 “C f 5 “C above the liquidus 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 for 10 s - 15 s after the solder has melted. Remove the
29、 crucible or beaker from the solder bath and allow it to cool until the solder 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 pe
30、llet with a clean tissue (3.7). Using the balance (3.2) weigh the dry pellet to a constant weight to 0,001 g. Record the mass of the pellet (m2). 4.2 Method B Cany out the test in duplicate. Using the balance (3.2) weigh 30 g rt 2 g of the cleaned wire to 0,001 g. Record the mass of the sample (m I
31、). Transfer the solder wire to the beaker (3.9) with sufficient glycerol (3.8) to cover the sample (approximately 50 ml 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 so
32、lder bath (3.6), maintained at a temperature 50 “C f 5 “C above the liquidus temperature of the wire under test. Turn the beaker until the solder has melted into one pellet. Leave the beaker immersed in the solder bath for 10 s - 15 s after the solder has melted, while turning gently. Allow the sold
33、er to solidify and then decant as much of the ffux/glycerol mixture as possible from the molten solder. Allow the solder to cool and solidify. Remove the solder pellet and wash it in water. Clean it thoroughly with dreasing solvent (3.1) to remove all traces of flux. Dry the pellet with a clean tiss
34、ue (3.7). Using the balance (3.2) measure the mass of the dry pellet to a constant weight, to 0,001 g (m2). NOTE - In cases of dispute. It is recommended that the method to be used be agreed between supplier and purchaser. 2 STD-aSI BS EN IS 12224-2-ENGL 3999 lb2ribbS 07A2852 OUT I EN IS0 12224-2:19
35、99 5 Expression of results for both methods Calculate the flux content of the sample wire as the percentage by mass, using the following formula: Flux content = ml ilm2 x 10 % (m / rn) where rnl is the mass, in grams, of the flux cored solder wire used in the test; m2 is the mass, in grams, of the s
36、older pellet. If the values of the two determinations differ by more than 0,2 %, the determination shall be repeated completely. Calculate the arithmetic mean of the two determinations. 6 Test report The test report shall include the following information: a) the identification of the test sample; b
37、) reference to this part of IS0 12224; 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 IS0 12224, or regarded as optional. 3 Annex A (informative) Bibliography 11 IS0 9453: 1990, Soft solder all
38、oys - Chemical composition and forms. 4 STD*BSI ES EN IS0 12224-2-ENGL 1797 W lb24bb7 0782854 782 E BS EN IS0 12224-2:1999 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK
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