1、CEN EN*29455-34 93 3404589 0053037 645 D 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:
2、Assessment of tackiness of flux residues (IS0 9455-14 : 1991) Flux de brasage tendre - Mthodes dessai - Prfverfahren - Partie 14: Dtermination du pouvoir collant des rsidus FluBmittelrckstnden FluBmittel zum Weichlten - %il 14: Bestimmung des Haftvermgens von de flux (IS0 9455-14 : 1991) (IS0 9455-1
3、4 : 1991) This European Standard was approved by CEN on 1993-08-02. CEN members are bound to comply with the CENKENELEC 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
4、 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 mem
5、ber 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, Swe
6、den, 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 O 1993 Copyright reserved to CEN members Ref. No. EN 29455-14 : 1993 E Foreword In 1991, IS0 9465-14
7、 1991 Safi solMngfluxes - 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 identicai text or by endorsement, at the latest by February 1994, an
8、d conflicting national standards shaU be withdrawn at the latest by February 1994. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finiand, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg
9、 Netherlands, Norway, hrtugal, Spain, Sweden, Switzerland and the United Kingdom. l b) If the flux under test is in liquid form - add OJO 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
10、 samples, degrease the surface of a suitable length of the cored solder sample, using a cloth dampened with the solvent (4.2). Weigh 1,OO g f 0,05 g of the degreased sam- ple, form it into a small flat coil and place it in the centre of the depression in one of the cleaned cop- per test pieces (clau
11、se 6). 7.1.3 For solder paste samples, weigh 0,50 g f 0,05 g of the solder paste sample into the centre of the depression in one o the cleaned cop- per test pieces (clause 6). 7.2 Heating the test piece Using the tongs (5.4) or other suitable means, care- fully lower the prepared test piece from 7.1
12、 on to the surface of the molten solder, maintained at 235 OC 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
13、30 min. 5 “C in the solder bath (5.1). 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 brushin
14、g, 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 CEN ENx29455-34 93 3404589 0053023 076 Page 5 EN 29466-14 : 1993 b) test method used (Le. reference to this pari of IS0 9455); The test report shall include the following informa- tion: a) identification of the test sample; c) results obtained: d) any unusual features noted during the test; e) details of any operation not included in this part of IS0 9455, or regarded as optional.
