1、July 2011 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77
2、.060; 83.180!$sS“1805848www.din.deDDIN EN 1965-2Structural adhesives Corrosion Part 2: Determination and classification of corrosion to a brasssubstrateEnglish translation of DIN EN 1965-2:2011-07Strukturklebstoffe Korrosion Teil 2: Bestimmung und Klassifikation der Korrosion eines MessingmaterialsE
3、nglische bersetzung von DIN EN 1965-2:2011-07Adhsifs structuraux Corrosion Partie 2: Dtermination et classification de la corrosion dun substrat en laitonTraduction anglaise de DIN EN 1965-2:2011-07SupersedesDIN EN 1965-2:2001-12www.beuth.deDocument comprises pagesIn case of doubt, the German-langua
4、ge original shall be considered authoritative.1206.11 DIN EN 1965-2:2011-07 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). The responsible German body involved in its preparation was
5、the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-04-55 AA Prfung von Konstruktionsklebstoffen, -klebverbindungen und Kernverbunden. Amendments This standard differs from DIN EN 1965-2:2001-12 as follows: a) a safety statement and an environmental s
6、tatement have been included; b) normative references have been updated; c) the concentrations of sulfuric acid and nitric acid have been included; d) the standard has been editorially revised. Previous editions DIN V ENV 1965-2: 1995-09 DIN EN 1965-2: 2001-12 2 EUROPEAN STANDARD NORME EUROPENNE EURO
7、PISCHE NORM EN 1965-2 May 2011 ICS 77.060; 83.180 Supersedes EN 1965-2:2001English Version Structural adhesives Corrosion Part 2: Determination and classification of corrosion to a brass substrate Adhsifs structuraux Corrosion Partie 2: Dtermination et classification de la corrosion dun substrat en
8、laiton Strukturklebstoffe Korrosion Teil 2: Bestimmung und Klassifikation der Korrosion eines Messingmaterials This European Standard was approved by CEN on 10 March 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europea
9、nStandard 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 any CEN member. This European Standard exists in three official versions (E
10、nglish, 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 versions. CEN members are the national standards bodies of Austria, Belgiu
11、m, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTE
12、E FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1965-2:2011: EEN 1965-2:2011 (E) 2 Conten
13、ts Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Products, materials and apparatus 45.1 Solvent 45.2 Brass electrode, consisting of 0,1 mm thick brass, Ms63F45 or Ms63F55 of width 10 mm. .45.3 Etching solution, consisting of 73 % concentrated sulfuric acid
14、(98 %), 26 % concentrated nitric acid (63 %), 0,5 % sodium chloride, 0,5 % carbon black. 45.4 Conditioning chamber, capable of maintaining a hot/humid climate in accordance with EN ISO 291. .55.5 Direct current source, (100 5) V, e.g. a battery, or rectifying equipment with a maximum permissable ele
15、ctrodyne alternating current not greater than 1 %. .55.6 Magnifier, with a magnification of 2,5 . 55.7 Electrode and clamping, in accordance with Figure 1 56 Preparation of the brass substrate 77 Test specimens 78 Procedure .79 Discolouration/corrosion 810 Test report 8Annex A (normative) Gradings f
16、or the appearance of plus pole and minus pole test foils at the surface of contact at the test specimen 9Bibliography . 10DIN EN 1965-2:2011-07 EN 1965-2:2011 (E) 3 Foreword This document (EN 1965-2:2011) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is he
17、ld by AENOR. 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 2011, and conflicting national standards shall be withdrawn at the latest by November 2011. Attention is drawn to the possibil
18、ity that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1965-2:2001. SAFETY STATEMENT Persons using this document should be familiar with the normal
19、 laboratory practice, if applicable. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory conditions. ENVIRONMENTAL
20、 STATEMENT It is understood that some of the material permitted in this standard may have negative environmental impact. As technological advantages lead to acceptable alternatives for these materials, they will be eliminated from this standard to the extent possible. At the end of the test, the use
21、r of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bu
22、lgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1965-2:20
23、11-07 EN 1965-2:2011 (E) 4 1 Scope This European Standard describes a method to determine the ability of an adhesive to corrode a brass substrate under the influence of an applied voltage and high humidity. The temperature, humidity, ageing period and applied voltage are chosen to ensure the maximum
24、 differentiation between the corrosivity of different adhesives and are not intended to represent any particular service condition. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
25、For undated references, the latest edition of the referenced document (including any amendments) applies. EN 923:2005+A1:2008, Adhesives Terms and definitions EN ISO 291, Plastics Standard atmospheres for conditioning and testing (ISO 291:2008) EN ISO 8044:1999, Corrosion of metals and alloys Basic
26、terms and definitions (ISO 8044:1999) ISO 426 (all parts), Wrought copper-zinc alloys Chemical composition and forms of wrought products 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923:2005+A1:2008 and the following apply. 3.1 corrosion destructiv
27、e attack on metals which can be chemical or electrochemical in nature NOTE The described method measures essentially an electrochemical attack. 4 Principle Two brass electrodes are held in contact with a flat sample of the cured adhesive. The assembly is placed in an environment with a relative humi
28、dity of 92 % at 42 C and a direct current voltage of 100 V is applied across the electrodes for four days. Following this the brass surface is examined and the extent of the tarnishing and/or corrosion decided on the basis of discolouration. 5 Products, materials and apparatus 5.1 Solvents. Alcohol
29、pure: for example propan-2-ol or ethanol. 5.2 Brass electrode, consisting of 0,1 mm thick brass, Ms63F45 or Ms63F55 of width 10 mm. The length of the foil shall be adapted to the test equipment in accordance with ISO 426 (all parts). 5.3 Etching solution, consisting of 73 % concentrated sulfuric aci
30、d (98 %), 26 % concentrated nitric acid (63 %), 0,5 % sodium chloride, 0,5 % carbon black. DIN EN 1965-2:2011-07 EN 1965-2:2011 (E) 5 5.4 Conditioning chamber, capable of maintaining a hot/humid climate in accordance with EN ISO 291. 5.5 Direct current source (100 5) V, e.g. a battery, or rectifying
31、 equipment with a maximum permissable electrodyne alternating current not greater than 1 %. 5.6 Magnifier, with a magnification of 2,5 . 5.7 Electrode and clamping, in accordance with Figure 1. This shall be constructed from inert insulating materials which do not cause additional corrosion under th
32、e test conditions. The brass test foils shall make contact with the entire test area of the test specimen with a pressure of about 0,1 MPa. DIN EN 1965-2:2011-07 EN 1965-2:2011 (E) 6 Key 1 Test specimen 2 Thickness 3 Test foil 4 Electrode 5 Block of insulating material 6 Adjusting screw 7 Pivot 8 Sp
33、ring 9 Intermediate piece of insulating material 10 Positive electrode 11 Negative electrode Figure 1 Test equipment for assessing the effect of electrolytic corrosion DIN EN 1965-2:2011-07 EN 1965-2:2011 (E) 7 6 Preparation of the brass substrate Degrease strips of the foil, about 200 mm long and w
34、ithout any flash, with acetone solvent. Immediately afterwards immerse in the etching solution (5.3) (maintained at 15 C to 25 C) for 15 s. Rinse the foil under running water to remove the etching solution (5.3). Repeat this procedure as necessary until the brass foil has an even, dull lustre. Immed
35、iately afterwards immerse the brass foil in pure alcohol (5.1) dry with blotting paper and cut into pieces of suitable length. 7 Test specimens The thickness of the test specimens shall correspond to the relevant product thickness. The test surfaces shall be machined and flat and be at right angles
36、to the edges. The material to be tested shall protrude a few tenths of a millimetre beyond the holding plates. Remove any flash left following machining with a sharp knife. Finally clean the machined test specimens with pure alcohol. NOTE The etching solution should be freshly made and used only onc
37、e. The roughness of the brass surface has an influence on colouration and can lead to faulty assessments. An even, dull surface reveals more marked colourations than a semi-matt or glossy surface. CAUTION The etching solution is corrosive. A minimum of three test specimens shall be used for each eva
38、luation. 8 Procedure Ensure that the surface of the electrode in contact with the brass test foils is not discoloured. Insert the test specimens and test foils in the test equipment using tweezers. Do not handle them under any circumstances. Preheat the test equipment with test specimens and test fo
39、ils in position to 42 C to 45 C and place it in the warm humid environment. This is to ensure that condensation on the test specimen is avoided. This is critical as liquid water in contact with the test specimens and foils can form an electrolyte, significantly increasing the rate of electrolytic co
40、rrosion. Place the preheated, assembled, test fixture in the warm humid environment and connect to the direct current source. Continue ageing under these conditions for four days. On completion of the above ageing, remove the test equipment from the humidity chamber and cool it to room temperature.
41、Remove the test foils and examine the face in contact with the test specimen with a magnifier (5.1). Examine with particular attention the positive pole for signs of the green products of corrosion, red colouration (start of dezincification, see EN ISO 8044:1999 for definition) or tarnishing. Examin
42、e the negative pole for signs of discolouration. NOTE With some materials, colourations occur during these tests which are not due to electrolytic corrosion and are recognizable as light brown to dark layers (tarnishing). These non-corrosive colourations consist of a uniform covering over the width
43、of the test area on the brass foils and occur both at the positive and negative electrodes and result without the application of direct current. Therefore, it is possible to confirm that these colourations are not caused by electrolysis by placing the test equipment in the humidity cabinet but witho
44、ut applying the direct current. DIN EN 1965-2:2011-07 EN 1965-2:2011 (E) 8 9 Discolouration/corrosion This is graded as follows, following the above described examinations: EN 1965-2 Plus pole grade A. toB (see Annex A) Minus pole grade 1 to 4. 10 Test report The test report shall include the follow
45、ing information: a) a reference to this European Standard, i.e. EN 1965-2; b) type and designation of the product tested; c) description of the substrate preparation procedure; d) description of the type and thickness of the substrates; e) conversion/discolouration grade ranking; f) details of any o
46、perations not specified in this European Standard together with details of any events likely to have had an effect on the results. DIN EN 1965-2:2011-07 EN 1965-2:2011 (E) 9 Annex A (normative) Gradings for the appearance of plus pole and minus pole test foils at the surface of contact at the test s
47、pecimen Table A.1 Gradings for the appearance of plus pole and minus pole test foils at the surface of contact at the test specimens Plus pole test foil Description Figurative for test specimen thickness 4 mm Figurative for test specimen thickness 1,5 mm Grading Non changes * * A Slight tarnishing a
48、nd marking * * AN Slight red colouration (start of dezincification) * * A/BHeavy red colouration (advanced dezincification) . Green products of corrosion in the form of small specks. (The changes described can also occur jointly.) * * BMinus pole test foil Description Figurative for test specimen thickness 4 mm Figurative for test specimen thickness 1,5 mm Grading Non changes * * 1 Slight colouration, recognizable as fine dots or l
