1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series - Vulcanized rubbers - Test on the susceptibility to corrosion in a damp atmosphere of metals in contact with vulcanized rubbersBS EN 2899:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2899 M
2、ay 2018 ICS 49.025.40 English Version Aerospace series - Vulcanized rubbers - Test on the susceptibility to corrosion in a damp atmosphere of metals in contact with vulcanized rubbers Srie arospatiale - lastomres vulcaniss - Essais de sensibilit la corrosion en atmosphre humide des mtaux au contact
3、des lastomres vulcaniss Luft- und Raumfahrt - Vulkanisierte Elastomere - Prfung der Korrosionsempfindlichkeit in Feuchtklima von Metallen bei Berhrung mit vulkanisierten Elastomeren This European Standard was approved by CEN on 17 December 2017. CEN members are bound to comply with the CEN/CENELEC I
4、nternal 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 CEN-CENELEC Management Centre or to
5、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 CEN-CENELEC Management Centre has the same status as the official
6、 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Nor
7、way, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All ri
8、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2899:2018 ENational forewordThis British Standard is the UK implementation of EN 2899:2018. The UK participation in its preparation was entrusted to Technical Committee ACE/65, Non-metallic mat
9、erials for aerospace purposes.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institutio
10、n 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 51123 3ICS 49.025.40Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2018.Amendments/corrigen
11、da issued since publicationDate Text affectedBRITISH STANDARDBS EN 2899:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2899 May 2018 ICS 49.025.40 English Version Aerospace series - Vulcanized rubbers - Test on the susceptibility to corrosion in a damp atmosphere of metals in contact with
12、vulcanized rubbers Srie arospatiale - lastomres vulcaniss - Essais de sensibilit la corrosion en atmosphre humide des mtaux au contact des lastomres vulcaniss Luft- und Raumfahrt - Vulkanisierte Elastomere - Prfung der Korrosionsempfindlichkeit in Feuchtklima von Metallen bei Berhrung mit vulkanisie
13、rten Elastomeren This European Standard was approved by CEN on 17 December 2017. 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 b
14、ibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 res
15、ponsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav R
16、epublic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP
17、EN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2899:2018 EBS EN 2899:2018EN 2899:2018 (E) 2 Contents Page
18、 European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Principle . 4 5 Apparatus and auxiliary products 5 6 Specimens 5 7 Test conditions . 6 8 Procedure. 6 9 Interpretation of results . 7 10 Designation 7 11 Test report . 8 BS EN 2899:2018EN 2899:2018 (E) 3 European
19、 foreword This document (EN 2899:2018) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associa
20、tions and the Official Services of the member countries of ASD, prior to its presentation to CEN. 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 November 2018, and conflicting national standards
21、shall be withdrawn at the latest by November 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations,
22、 the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, La
23、tvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2899:2018EN 2899:2018 (E) 4 1 Scope This document defines tests on the susceptibility to corrosion in a damp atmosphere of
24、metals in contact with vulcanized rubbers. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest ed
25、ition of the referenced document (including any amendments) applies. EN 2071, Aerospace series Sheets in aluminium and aluminium alloys Thickness 0,25 mm a 6 mm Dimensions EN 22171, Steel FE-PL52 S 1 080 MPa Rm 1 250 MPa Sheets and plates 2 mm a 20 mm Aerospace series 2EN 2395, Aerospace series Alum
26、inium alloy AL-P2014A T4 or T42 Sheet and strip 0,4 mm a 6 mm EN 3525, Aerospace series Steel FE-PL1505 (15CrMoV6) Air melted Hardened and tempered Plate 6 mm a 20 mm 1 080 MPa Rm 1 280 MPa ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods 3 Te
27、rms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at
28、 http:/www.iso.org/obp 3.1 contact corrosion the visually perceptible deterioration of the metal surface in contact with rubbers, after exposure in a damp atmosphere 4 Principle The rubber test pieces shall be directly placed after immersion in the test fluid between two test metal disks and exposed
29、 to a damp atmosphere under defined conditions. After exposure, the metal disks shall be visually examined so that deterioration due to corrosion can be noted. 1Inactive for new design, see EN 3525. 2Published as ASD-STAN Standard at the date of publication of this European Standard by AeroSpace and
30、 Defence industries Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org). BS EN 2899:2018EN 2899:2018 (E) 5 5 Apparatus and auxiliary products 5.1 Apparatus test assembly which enables a compression of (12 3) % of the rubber test pieces by means of metal disks (Figure 1); a device f
31、or producing x 20 magnification; climatic chamber where a relative humidity of 95 % minimum can be obtained at (23 2) C. 5.2 Auxiliary products polyethylene gloves; appropriate solvent; lint free cotton cloth; test fluids. 6 Specimens 6.1 Metal disks 6.1.1 Material Type 1 Aluminium alloy AL-P2014A T
32、4 or T42 according to EN 2395. Type 2 Steel FE-PL52S 1 080 MPa Rm 1 250 MPa according to EN 2217. 6.1.2 Dimensions The metal to be tested shall be circular disks of an outer diameter (120 0,5) mm, with a (2000,2+) mm diameter hole in the centre (see Figure 1). These disks shall be 5 mm thick minimum
33、 if they are in steel and 10 mm minimum thick if they are in aluminium so that they are not deformed when gripped. 6.1.3 Preparation The metal disks shall have a roughness of 0,4 m maximum on all surfaces. The edges shall be rounded. 6.1.4 Number For each test and exposure method, use two metal disk
34、s. The two disks may be made of the same metal or of two different metals. 6.2 Rubber test pieces 6.2.1 Material According to the material standard. BS EN 2899:2018EN 2899:2018 (E) 6 6.2.2 Dimensions (20 1) mm x (20 1) mm cut from test strips (2 0,2) mm thick. 6.2.3 Number Three test pieces for each
35、 test and exposure method. 6.2.4 Time lapse between vulcanization and testing The test pieces shall be stored according to ISO 23529. 7 Test conditions 7.1 Test temperature The temperature shall be (23 2) C. 7.2 Testing time The testing time shall be 7 d or a multiple of 7 d. 7.3 Humidity The relati
36、ve humidity shall be 95 % minimum. 8 Procedure Clean all the surfaces of the metallic disks and the rubber test pieces with a lint free cotton cloth soaked in an appropriate solvent and leave to dry for 2 h minimum at (23 2) C. After cleaning, the degreased test pieces shall not be touched with bare
37、 fingers; they shall only be handled with polyethylene gloves. Depending on the method chosen, the rubber test pieces and the metallic disks shall be conditioned as follows: Method A: The rubber test pieces and metallic disks shall be immersed in the test liquid for 15 min at a temperature of (23 2)
38、 C, then allowed to drain. Method B: The rubber test pieces and metallic disks shall not undergo any conditioning. Next, place the rubber test pieces and the annular isolating block between the two metallic disks. The isolating block shall be chosen with a thickness such that the rubber test pieces
39、are compressed by (12 3) %. Tighten the assembly until it comes to rest against the block. BS EN 2899:2018EN 2899:2018 (E) 7 Place the assembly in the test chamber in a damp atmosphere. NOTE The test pieces shall be placed at a distance of at least 10 mm from the edges of the metallic disks and arra
40、nged symmetrically (Figure 1). At the end of exposure time, the test assembly shall be placed in a normal atmosphere for (30 5) min at (23 2) C. The metallic disks shall be separated from the rubber test pieces, then cleaned using appropriate solvents to eliminate all traces of rubber. The two metal
41、lic disks shall be then subjected to a visual examination at x 20 magnification to detect any discolouration or sign of corrosion. 9 Interpretation of results Any discolouration or surface deterioration of the metal strip shall be described in the test report. 10 Designation EXAMPLE EN2899 A A Numbe
42、r of this standard Type of material used for metallic disks (see Table 1) Method used (A or B) Table 1 Type Code 1 and 1 A 1 and 2 or 2 and 1 B 2 and 2 C BS EN 2899:2018EN 2899:2018 (E) 8 11 Test report The test report shall make reference to this standard and shall include the following information
43、: test method (A or B); if test method A: Description of test liquid; type and designation of the tested product; batch and date of manufacture; material of metal disks; test environment; exposure time; number of tests; visible deteriorations of the metal disks/description of corrosion; any detail n
44、ot provided for this standard of the subject of specific requirements; test date. BS EN 2899:2018EN 2899:2018 (E) 9 Dimensions in millimetres Key 1 Metal disks 2 Isolating flanged ring 3 Stainless steel screw M18 4 Test piece thickness: 2 5 Polyamide isolating block 6 Washer 7 Steel axis Figure 1 Ex
45、ample of test assembly (metallic disks of the same material) BS EN 2899:2018This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards
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