BS-EN-29455-14-1993 ISO-9455-14-1991.pdf

british standard bs en 29455-14:1993 iso 9455-14: 1991 soft soldering fluxes test methods part 14: assessment of tackiness of flux residues the european standard en 29455-14:1993 has the status of a british standard udc 621.791.35.048:620.179.4 licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi bs en 29455-14:1993 this british standard, having been prepared under the direction of the non-ferrous metals standards policy committee, was published under the authority of the standards board and comes into effect on 15 december 1993 bsi 12-1999 the following bsi references relate to the work on this standard: committee reference nfm/27 draft for comment 90/46344 dc isbn 0 580 21832 5 cooperating organizations the european committee for standardization (cen), under whose supervision this european standard was prepared, comprises the national standards organizations of the following countries: austriaoesterreichisches normungsinstitut belgiuminstitut belge de normalisation denmarkdansk standardiseringsraad finlandsuomen standardisoimisliito, r.y. franceassociation franaise de normalisation germanydeutsches institut fr normung e.v. greecehellenic organization for standardization icelandtechnological institute of iceland irelandnational standards authority of ireland italyente nazionale italiano di unificazione luxembourginspection du travail et des mines netherlandsnederlands normalisatie-instituut norwaynorges standardiseringsforbund portugalinstituto portugus da qualidade spainasociacin espaola de normalizacin y certificacin swedenstandardiseringskommissionen i sverige switzerlandassociation suisse de normalisation united kingdombritish standards institution amendments issued since publication amd. no.datecomments licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi bs en 29455-14:1993 bsi 12-1999i contents page cooperating organizationsinside front cover national forewordii foreword2 1scope3 2normative references3 3principle3 4reagents and materials3 5apparatus3 6test pieces3 7procedure3 8examination of the test piece4 9expression of results4 10test report4 national annex na (informative) committees responsibleinside back cover licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi bs en 29455-14:1993 ii bsi 12-1999 national foreword this british standard has been prepared under the direction of the non-ferrous metals standards policy committee and is the english language version of en 29455-14:1993 soft soldering fluxes test methods part 14: assessment of tackiness of flux residues, published by the european committee for standardization (cen). it is identical with iso 9455-14:1991 published by the international organization for standardization (iso). a british standard does not purport to include all the necessary 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, pages i and ii, the en title page, pages 2 to 4, an inside back cover and a back 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. licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi european standard norme europenne europische norm en 29455-14 august 1993 udc 621.791.35.048:620.179.4 descriptors: soldering, soldering fluxes, physical tests, determination, gluing, adhesion english version soft soldering fluxes test methods part 14: assessment of tackiness of flux residues (iso 9455-14:1991) flux de brasage tendre mthodes dessai partie 14: dtermination du pouvoir collant des rsidus de flux (iso 9455-14:1991) flumittel zum weichlten prfverfahren teil 14: bestimmung des haftvermgens von flumittelrckstnden (iso 9455-14:1991) this european standard was approved by cen on 1993-08-02. 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 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 responsibility 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, denmark, finland, france, germany, greece, iceland, ireland, italy, luxembourg, netherlands, 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 1993 copyright reserved to cen members ref. no. en 29455-14:1993 e licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi en 29455-14:1993 bsi 12-1999 2 foreword in 1991, iso 9455-14:1991 soft soldering fluxes test methods part 14: assessment of tackiness of flux residues was submitted to the cen unique acceptance procedure. the result of the uap was positive. 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 february 1994, and conflicting national standards shall be withdrawn at the latest by february 1994. according to the cen/cenelec internal regulations, the following countries are bound to implement this european standard: austria, belgium, denmark, finland, france, germany, greece, iceland, ireland, italy, luxembourg, netherlands, norway, portugal, spain, sweden, switzerland and the united kingdom. licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi en 29455-14:1993 bsi 12-19993 1 scope this part of iso 9455 specifies a qualitative method for the assessment of the tackiness of the residues of a soft soldering flux after a soldering process. the method is applicable to all fluxes, solder pastes and flux cored solder wires. the method is particularly appropriate for applications where flux residues are left in situ on electrical and electronic equipment. 2 normative references the following standards contain provisions which, through reference in this text, constitute provisions of this part of iso 9455. at the time of publication, the editions indicated were valid. all standards are subject to revision, and parties to agreements based on this part of iso 9455 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. members of iec and iso maintain registers of currently valid international standards. iso 1634-1:1987, wrought copper and copper alloy plate, sheet and strip part 1: technical conditions of delivery for plate, sheet and strip for general purposes. iso 9453:1990, soft solder alloys chemical compositions and forms. 3 principle the flux is melted on a copper sheet test piece in contact with a standard mass of solder. in the case of flux cored solders and solder pastes, a standard mass of the material is melted on the copper test piece. after the test piece has cooled to room temperature, the flux residues are tested for tackiness using chalk powder. 4 reagents and materials in the test use only reagents of recognized analytical quality and only distilled, or deionized, water. 4.1 acid cleaning solution add cautiously, with stirring, 75 ml of sulfuric acid ( 1,84 g/ml) to 210 ml of water and mix. cool, add 15 ml of nitric acid ( 1,42 g/ml) and mix the solution thoroughly. 4.2 degreasing solvent, such as acetone or petroleum ether. 4.3 powdered chalk 4.4 0,5 mm thick copper sheet, complying with iso 1634-1 grade cu etp, condition ha. 4.5 acetone 4.6 solder wire, or pellets, complying with iso 9453, grade s-sn60pb40. 5 apparatus usual laboratory apparatus and, in particular, the following. 5.1 solder bath, either circular with diameter not less than 120 mm, or rectangular with dimensions not less than 100 mm 75 mm, containing tin-lead solder having a liquidus less than 200 c. the depth of the solder in the bath shall be not less than 40 mm. the bath shall be capable of being maintained at a temperature of (235 5) c. 5.2 cupping device this shall be fitted with a 27 mm diameter die and a 20 mm diameter ball. 5.3 drying oven, suitable for use at (110 2) c. 5.4 tongs, or other suitable mechanical device, to lift the test piece from the surface of the molten solder bath. 5.5 soft brush, of diameter approximately 7 mm. 6 test pieces from the sheet of half hard copper, approximately 0,5 mm thick (4.4), cut test pieces each 50 mm 50 mm. clamp each of the test pieces, in turn, centrally on to the 27 mm die of the cupping device (5.2). using the 20 mm diameter ball, make a depression in the centre of each test piece 3 mm deep, by forcing the ball into the die. one corner of the test piece may be bent up to facilitate handling with the tongs. immediately before the test, use the solvent (4.2) to degrease each test piece, and immerse the test pieces for 20 s in the acid cleaning solution (4.1). remove the test pieces from the cleaning solution, wash well under running water, rinse in acetone (4.5) and dry by air blowing at room temperature. 7 procedure 7.1 preparation of the test pieces 7.1.1 for solid, paste and liquid flux samples, weigh 1,00 g 0,05 g of the solder wire or pellets (4.6), previously degreased in the solvent (4.2), and transfer it to the centre of the depression in one of the cleaned copper test pieces (clause 6). note 1this may conveniently be done, if solder wire is used, by forming the wire into a tight spiral. licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi en 29455-14:1993 4 bsi 12-1999 according to the form of the flux under test, continue with the preparation of the test piece by following the procedure given in either a) or b) as follows: a) if the flux under the test is in solid or paste from weigh between 0,035 g and 0,040 g of the solid or paste flux and add this to the solder in the depression of the test piece; b) if the flux under test is in liquid form add 0,30 ml of the flux to the solder in the depression of the test piece. evaporate the solvent at 60 c for 10 min in the drying oven (5.3). 7.1.2 for flux cored solder samples, degrease the surface of a suitable length of the cored solder sample, using a cloth dampened with the solvent (4.2). weigh 1,00 g 0,05 g of the degreased sample, form it into a small flat coil and place it in the centre of the depression in one of the cleaned copper test pieces (clause 6). 7.1.3 for solder paste samples, weigh 0,50 g 0,05 g of the solder paste sample into the centre of the depression in one of the cleaned copper test pieces (clause 6). 7.2 heating the test piece using the tongs (5.4) or other suitable means, carefully lower the prepared test piece from 7.1 on to the surface of the molten solder, maintained at 235 c 5 c in the solder bath (5.1). allow the test piece to float on the solder bath until the solder melts and leave the test piece in this position for a further 5 s. remove the test piece carefully from the bath and allow it to cool, in air, in a horizontal position for 30 min. 8 examination of the test piece dust the surface of the flux residue on the test piece liberally with the powdered chalk (4.3). lightly brush the chalked surface with the soft brush (5.5). 9 expression of results if the chalk powder is easily removed by brushing, the flux is deemed to be “not tacky”. if the chalk powder cannot be removed by brushing, or can be removed only with difficulty, the flux is deemed to be “tacky”. 10 test report the test report shall include the following information: a) identification of the test sample; b) test method used (i.e. reference to this part of iso 9455); c) results obtained; d) any unusual features noted during the test; e) details of any operation not included in this part of iso 9455, or regarded as optional. licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi bs en 29455-14:1993 bsi 12-1999 national annex na (informative) committees responsible the united kingdom participation in the preparation of this european standard was entrusted by the non-ferrous metals standards policy committee (nfm/-) to technical committee nfm/27, upon which the following bodies were represented: association of british pewter craftsmen british plumbing fittings manufacturers association british steel industry department of trade and industry eea (the association of electronics, telecommunications and business equipment industries) international tin research institute london metal exchange metal packaging manufacturers association ministry of defence solder makers association licensed copy: sheffieldun sheffieldun, na, wed nov 01 05:27:59 gmt+00:00 2006, uncontrolled copy, (c) bsi bs en 29455-14:1993 iso 9455-14: 1991 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 view on standards in europe and at the international level. it is incorporated by royal charter. revisions british standards are updated by amendment or revision. users of british standards should make sure that they possess the latest amendments or editions. it is the constant 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