1、BRITISH STANDARD Soft soldering fluxes - Test methods Part 12. Steel tube corrosion test The European Standard EN IS0 9455-12 : 1994 has the status of a British Standard UDC 621.791 5.048 : 620.193.4 BS EN IS0 9455-12 : 1994 - - - - CEN EN*IS0*9455 -12 94 W 3404589 0079700 Tb W effect on Amd. No. 15
2、 December 1994 BS EN IS0 945512 : 1994 Date Ext affected 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: Austria Belgium Denmark Finland
3、 France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r. y. Association franaise de normalisation Deutsches Institut fr
4、 Normung e.V. Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualida
5、de Asociacin Espaola de Normalizacin y Certificacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution O BSI 1994 I 1 The following ES1 references relate to the work on this standard: Committee reference NFM/27 Draft for comment 91/40035 DC ISBN
6、O 580 22885 1 CEN EN*ISO*9455 -32 94 H 3404589 0079703 T4 BS EN IS0 946512 : 1994 Contents page Cooperating organizations Inside front cover National foreword i Foreword 2 Method 1 Scope 3 2 Normative references 3 Principle 4 Materials 0 Apparatus 6 Procedure 7 8 Test report Assessment and expressio
7、n of results Annex ZA (normative) Normative references to international publications with their relevant European publications 6 National annex NA (informative) Committees responsible Inside back cover National foreword This British Standard has been prepared under the direction of the Non-ferrous M
8、etals Standards Policy Committee and is the English language version of EN IS0 9455-12 : 1994, Soft solderingfluxes - %t methods - Part 12: Steel tube corrosion test, published by the European Committee for Standardization (CEN). It is identical with IS0 9455-12 : 1992 Soft solderingfluxes - Est met
9、hods - Part 12: Steel tube corrosion test, published by the International Organization for Standardization (1.30). Compliance with a British Standard does not of itself confer immunity from legal obligations. i CEN EN*IS0*9455 -12 94 3404589 0079702 830 EUROPEAN STANDARD EN IS0 9455-12 NORME EUROPEN
10、NE EUROPISCHE NORM September 1994 UDC 621.791.5.048 : 620.193.4 Descriptors: Soldering, soldering fluxes, corrosion tests, test specimens, steel tubes English version Soft soldering fluxes - %st methods - Part 12: Steel tube corrosion test (IS0 9455-12 : 1992) Flux de brasage tendre - Mthodes dessai
11、 - Prfverfahren - part 12: Essai de corrosion des tubes dacier Flu3mittel zum Weichlten - Eil 12: Stahl-Rhrchen-Korrosionstest (IS0 9455-12 : 1992) (IS0 9455-12 1992) This European Standard was approved by CEN on 1994-09-06. CEN members are bound to comply with the CENKENELEC Internal Regulations wh
12、ich 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 St
13、andard 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 st
14、andards 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 P
15、revious page is blank Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to CEN members Ref. No. EN IS0 9455-12 : 1994 E CEN EN*ISO*9455 -12 94 m 3404589 0079703 777 Page 2 EN IS0 9455-12 : 1994 Foreword This European Standard was taken over by the Bchnical Committee
16、CEN/?r, 121, Welding, from the work of ISO/W 44, Soft soldering fluxes - %st methods, of the International Standards Organization (ISO) . CEN/TC 121 had decided to submit the final draft for Unique Acceptance Procedure. The result was positive. This European Standard shall be given the status of a n
17、ational standard, either by publication of an identical text or by endorsement, at the latest by March 1995, and conflicting national standards shall be withdrawn at the latest by March 1995. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this Europe
18、an Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. CEN EN*IS0+9455 -12 94 = 3404589 0079704 bo3 m Page 3 EN IS0 945512 : 1994 Soft soldering fluxes - Test met
19、hods - Part 12: Steel tube corrosion test 1 Scope This pari of IS0 9455 specifies a qualitative method for assessing the corrosive properties of flux resi- dues and flux vapours towards mild steel. The test is applicable to all fluxes, although it is primarily in- tended to be used for fluxes of typ
20、e 1, as defined in IS0 9454-1. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this pari of IS0 9455. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to
21、 agreements based on this part of IS0 9455 are encouraged to investi- gate the possibility of applying the most recent edi- tions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 9329-1:1989, Seamless steel tubes for pressure
22、 purposes - Technical delivery conditions - Part 1: Unalloyed steels with specified room temperature properties. IS0 9454-1:1990, Soft soldering fluxes - Classifica- tion and requirements - Part 1: Classification, labelling and packaging. 3 Principle The flux under test is deposited on to the inside
23、 walls of a clean mild-steel tube. After conditioning the fluxed tube for a specified time under controlled temperature and humidity conditions, the severity of the resulting corrosion is assessed visually by comparison with a standard chart. 4 Materials 4.1 leum ether. Degreasing solvent, such as a
24、cetone or petro- 4.2 Silicon carbide cloth, 180 grade. 5 Apparatus Usual laboratory apparatus and, in particular, the following . 5.1 Copper block, as in figure 1. The grooves, which are to accommodate the steel tubes during the test, are to be freshly tinned prior to the test. The diameter of the g
25、rooves shall be 0,5 mm larger than the diameter of the steel tubes used. 5.2 Oven, suitable for heating the copper block (5.1) to 300 “C f 10 “C. 5.3 Laboratory thermometer, having a O “C to 360 “C range. Alternatively, a thermocouple and its associated temperature indicator may be used. 5.4 Tempera
26、ture/humidity oven, capable of main- taining a temperature of 23 “C i- 2 “C and a relative humidity of (80 f 5) Oh. 5.5 Tweezers. page 4 EN IS0 946812 : 1994 Dimensions in millimetres I 0+ OS where IT = diameter of steel tube test rpeclmen Figure 1 - Copper block 6 Procedure 6.1 Preparation of test
27、specimens The test specimen shall be a 60 mm f 5 mm long steel tube of 14 rnm to 16 mm diameter and 0,5 mrn wall thickness. For testing type 1 fluxes, the tube shall comply with IS0 9329-1 Grade TS 360. For testing other types of flux, the grade of steel tube to be used shall be subject to agreement
28、 between the purchaser and supplier. NOTE 1 If a solvent-type flux is under test, a prelimi- nary drying period may be specified, before the tube is placed onto the copper block, subject to agreement be- tween the supplier and the purchaser. 6.2.2 Place the complete tube assembly into one groove of
29、the copper block (5.1) previously heated to 300 “C .It 10 “C in the oven (5.2) and held at that temperature. Allow the test specimen to remain in the groove for 60 s. This causes the flux to evap- orate and deposit onto the inside walls of the tube. Do not allow the flux or its vapours to ignite dur
30、ing this stage, otherwise this will invalidate the test (see also note 1). Select four such specimens and cut each tube in half longitudinally. Clean the inside surfaces of the tubes with the silicon carbide cloth (4.2), so as to remove all oxidation and contamination. Degrease the cleaned tubes in
31、the solvent (4.1). In order to avoid further contamination of the tubes, after the de- greasing operation use the tweezers for subsequent handling of the tubes. 6.2 Test method Remove the test specimen from the block and allow it to cool. 6.2.3 Repeat the test method 6.2.1 and 6.2.2 for the second a
32、nd third test specimens. 6.2.4 Use the fourth test specimen as a control for comparison purposes, by carrying out the procedure described in 6.2.2 (.e. omitting the flux addition). 6.2.1 Apply 0,l ml of the liquid flux under test (or 6.2.5 Separate the halves of the four cooled test 0,OS g of the fl
33、ux under test if it is in solid or paste specimens and transfer them to the form) to the centre of the inside surface of the lower temperature/humidity oven (5.4). Condition all the half of one of the test specimens. Place the upper tubes for 14 days at 23 “C 2 “C and (80 I 5) /o half of the tube on
34、 top of the lower half. relative hum id ity . CEN EN*IS0*9455 -12 94 m 3404589 0079706 48b m 6.2.6 At the end of the conditioning period, remove the test specimens from the teinperature/humidity oven and examine the inside (concave) surface of the upper half of each specimen for evidence of co irosi
35、on . 7 Assessment and expression of results For the test to be valid, the surface of the “control“ tube shall be comparable with the “no corrosion“ specimen in figure2. Visually assess the degree of corrosion on the inside surfaces of all the upper halves of the tubes in comparison with figure 2. Ex
36、press the result of the test as the caption of the photograph, in figure 2 which most closely approxi- mates to the average level of corrosion of the three tubes tested. Page 5 EN IS0 945512 : 1994 8 Test report The test report shall include the following informa- tion: a) the identification of the
37、test sample; b) the test method used (.e. reference to this pari of IS0 9455); c) the result obtained from the test (.e. the example in figure 2 which most closely corresponds to the average level of corrosion found in the test): d) any usual features noted in the test; e) details of any operation n
38、ot included in the pari of IS0 9455 or regarded as optional. a) No corrosion b) Spot corrosion * Fax: O181 996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested
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41、; Fax: 0181 996 7001. Copyright Copyright subsists in all BSI publications and no part may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard of necessary details such as symbols and size, type or
42、grade designations including use by incorporation into computer programs, but where these details are reproduced including without limitation in printed form, in computer programs or in any other form whatsoever, the permission in Mriting of BSI must be obtained and if granted will be on terms including royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright should be made to the Copyright Manager at Chiswick. ISBN O 580 22885 1 NFM/S7
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