DIN EN 13523-25-2014 Coil coated metals - Test methods - Part 25 Resistance to humidity German version EN 13523-25 2014《滚涂金属 试验方法 第25部分 耐潮性 EN 13523-25 2014的德文版本》.pdf

1、August 2014 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

2、25.220.60!%:;0“2232413www.din.deDDIN EN 13523-25Coil coated metals Test methods Part 25: Resistance to humidity;English version EN 13523-25:2014,English translation of DIN EN 13523-25:2014-08Bandbeschichtete Metalle Prfverfahren Teil 25: Bestndigkeit gegen Feuchte;Englische Fassung EN 13523-25:2014,

3、Englische bersetzung von DIN EN 13523-25:2014-08Tles prlaques Mthodes dessai Partie 25: Rsistance lhumidit;Version anglaise EN 13523-25:2014,Traduction anglaise de DIN EN 13523-25:2014-08SupersedesDIN EN 13523-25:2006-08www.beuth.deDocument comprises 12 pagesIn case of doubt, the German-language ori

4、ginal shall be considered authoritative.07.14DIN EN 13523-25:2014-08 2 A comma is used as the decimal marker. National foreword This document (EN 13523-25:2014) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, (Secretariat: DIN, Germany), Working Group WG 9 “Testing of coi

5、l coated metals” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Beschichtungsstoffe und Beschichtungen (DIN Standards Committee Coatings and Coating Materials), Working Committee NA 002-00-07 AA Allgemeine Prfverfahren fr Beschichtungssto

6、ffe und Beschichtungen. Amendments This standard differs from DIN EN 13523-25:2006-08 as follows: a) the description of the test panel has been revised; b) a specification for the water used for the test has been added; c) information concerning humidity in the test cabinet has been added to Table 1

7、; d) the description of the evaluation has been revised. Previous editions DIN EN 13523-25: 2006-08 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13523-25 June 2014 ICS 25.220.60 Supersedes EN 13523-25:2006English Version Coil coated metals - Test methods - Part 25: Resistance to humidity Tle

8、s prlaques - Mthodes dessai - Partie 25: Rsistance lhumidit Bandbeschichtete Metalle - Prfverfahren - Teil 25: Bestndigkeit gegen Feuchte This European Standard was approved by CEN on 7 May 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions

9、 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 any CEN member. This European Standard exists in t

10、hree 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 versions. CEN members are the national standards

11、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, Norway, Poland, Portugal, Romania, Slovakia, Slovenia

12、, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved wor

13、ldwide for CEN national Members. Ref. No. EN 13523-25:2014 EEN 13523-25:2014 (E) 2Contents Page Foreword 3 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Principle 5 5 Apparatus . 6 6 Sampling . 6 7 Test panels . 6 8 Procedure . 6 8.1 Preparation . 6 8.2 Exposure in humidity cabine

14、t . 8 8.3 Evaluation . 8 8.3.1 General 8 8.3.2 Overall surface (flat surface of the panel) . 8 8.3.3 Edges, scribes and bends (as applicable) 8 9 Expression of results 9 10 Precision . 9 11 Test report 9 Bibliography 10 DIN EN 13523-25:2014-08 EN 13523-25:2014 (E) 3Foreword This document (EN 13523-2

15、5:2014) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN. 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 December 2014, and conf

16、licting national standards shall be withdrawn at the latest by December 2014. Attention is drawn to the possibility 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 doc

17、ument supersedes EN 13523-25:2006. The main technical changes are: a) the description of the test panel was amended; b) a specification for the water used for the test was added; c) information concerning humidity in the test cabinet was added to Table 1; d) the description of the evaluation was ame

18、nded. EN 13523, Coil coated metals Test methods, consists of the following parts: Part 0: General introduction Part 1: Film thickness Part 2: Gloss Part 3: Colour difference Instrumental comparison Part 4: Pencil hardness Part 5: Resistance to rapid deformation (impact test) Part 6: Adhesion after i

19、ndentation (cupping test) Part 7: Resistance to cracking on bending (T-bend test) Part 8: Resistance to salt spray (fog) Part 9: Resistance to water immersion Part 10: Resistance to fluorescent UV radiation and water condensation Part 11: Resistance to solvents (rubbing test) Part 12: Resistance to

20、scratching Part 13: Resistance to accelerated ageing by the use of heat Part 14: Chalking (Helmen method) Part 15: Metamerism DIN EN 13523-25:2014-08 EN 13523-25:2014 (E) 4 Part 16: Resistance to abrasion Part 17: Adhesion of strippable films Part 18: Resistance to staining Part 19: Panel design and

21、 method of atmospheric exposure testing Part 20: Foam adhesion Part 21: Evaluation of outdoor exposed panels Part 22: Colour difference Visual comparison Part 23: Resistance to humid atmospheres containing sulfur dioxide Part 24: Resistance to blocking and pressure marking Part 25: Resistance to hum

22、idity Part 26: Resistance to condensation of water Part 27: Resistance to humid poultice (Cataplasm test) Part 29: Resistance to environmental soiling (Dirt pick-up and striping) According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bo

23、und 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug

24、al, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 13523-25:2014-08 EN 13523-25:2014 (E) 51 Scope This Part of EN 13523 specifies a procedure for evaluating the resistance to humidity of an organic coating on a metallic substrate, by means of exposure

25、in a humidity cabinet under controlled conditions. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edit

26、ion of the referenced document (including any amendments) applies. EN 13523-0:2014, Coil coated metals Test methods Part 0: General introduction EN ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes

27、in appearance Part 2: Assessment of degree of blistering (ISO 4628-2) EN ISO 4628-3, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 3: Assessment of degree of rusting (ISO 4628-3) EN ISO 4

28、628-4, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 4: Assessment of degree of cracking (ISO 4628-4) EN ISO 4628-5, Paints and varnishes Evaluation of degradation of coatings Designation

29、 of quantity and size of defects, and of intensity of uniform changes in appearance Part 5: Assessment of degree of flaking (ISO 4628-5) EN ISO 4628-8, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appea

30、rance Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect (ISO 4628-8) EN ISO 4628-10, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 10:

31、Assessment of degree of filiform corrosion (ISO 4628-10) EN ISO 17872, Paints and varnishes Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing (ISO 17872) 3 Terms and definitions For the purposes of this document, the definitions given in EN 135

32、23-0:2014 apply. 4 Principle The method consists of exposing a test panel to humidity, for a pre-determined time, at a specified temperature. The test panel is evaluated for any changes such as blistering or corrosion (e.g. red rust, white rust). Both continuous and cyclic humidity tests can be carr

33、ied out. DIN EN 13523-25:2014-08 EN 13523-25:2014 (E) 65 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 5.1 Humidity cabinet with air temperature control, capable of achieving relative humidity of approx. 100 % with condensation on the test panels. It should also

34、 ensure dry periods by adequate purging or allow for the cabinet door to be left open during the dry period. 5.2 Cutting tool, with a hard metal tip having a radius capable of exposing at least 0,2 mm of metal substrate; as specified in EN ISO 17872. 6 Sampling See EN 13523-0. 7 Test panels See EN 1

35、3523-0. The panels (usually 150 mm 100 mm) shall be cut from flat material and free from contamination. The longer side shall be in the rolling direction. If not otherwise specified, the edges are exposed and the reverse side is protected. If not otherwise specified, the edges of exposed panels shal

36、l be sheared with the burrs away from the test surface. 8 Procedure 8.1 Preparation Scribing or bending of test panels to evaluate blistering and corrosion phenomena at the scribes or at the bend is optional. In case of scribing, the scribes shall be prepared by means of the cutting tool (5.2) and e

37、xtend down just through the organic coating. The scribed indentation shall expose at least 0,2 mm of metal substrate. If the substrate is zinc- or zinc-alloy coated steel, the scratch shall be to the zinc coating, and not down to the steel. Two configurations are possible: either two scribes arrange

38、d diagonally, crossing each other in the middle of the specimen and extending to about 20 mm from the edges (see Figure 1); or two scribes of equal length arranged at 90 to each other, the scribes being at least 40 mm in length with the vertical scribe central to the horizontal but separated by 20 m

39、m. All scribes shall extend at least 20 mm from the edges (see Figure 2). DIN EN 13523-25:2014-08 EN 13523-25:2014 (E) 7 Dimensions in millimetres Key a rolling direction Figure 1 Diagonal scribe marks on coated panels Key a rolling direction Figure 2 Perpendicular scribe marks on coated panels DIN

40、EN 13523-25:2014-08 EN 13523-25:2014 (E) 88.2 Exposure in humidity cabinet Use deionised water having a conductivity not greater than 0,5 mS/m and maintain the quantity of the water throughout the test. Expose the test panels in the humidity cabinet at an angle of between 15 and 25 to the vertical.

41、If a different angle is used, it shall be stated in the test report. The test panels may be exposed to different combinations of relative humidity (RH) and temperature (t) for a specified exposure time. Table 1 summarises some typical conditions (other conditions and cycles may be agreed). Table 1 T

42、ypical conditions for humidity testing Test duration Conditions / Cycles Continuous humidity test 500 h (21 days) t = (40 3) C, RH approximately 100 % with condensation on the test specimens Cyclic humidity test, dry periods 500 h (21 days) Each cycle consists of two periods: Period 1: 8 h t = (40 3

43、) C RH approximately 100 % with condensation on the test specimens Period 2: 16 h including cooling down (climatic chamber open or ventilated) t = (23 3) C RH approaching ambient 8.3 Evaluation 8.3.1 General Examine the test panels periodically. Inspection time shall be as short as possible as furth

44、er changes can occur outside the cabinet. The point in the cycle when the panels were evaluated shall be stated in the test report. At the end of the required test exposure remove the test panels from the humidity cabinet, carefully wipe off surface moisture with a soft tissue and immediately conduc

45、t the final evaluation. If required, take pictures to record any change caused by exposure. 8.3.2 Overall surface (flat surface of the panel) The overall surface shall be inspected for blisters in accordance with EN ISO 4628-2 and corrosion in accordance with EN ISO 4628-3. 8.3.3 Edges, scribes and

46、bends (as applicable) Edges, scribes and bends shall be examined for defects: e.g. filiform corrosion in accordance with EN ISO 4628-10, delamination and corrosion around a scribe in accordance with EN ISO 4628-8, blisters in accordance with EN ISO 4628-2 and rust (white or red) in accordance with E

47、N ISO 4628-3. To determine the time of the on-set of defects, limited intermediate inspections of test panels may be carried out. DIN EN 13523-25:2014-08 EN 13523-25:2014 (E) 9 Cracking and flaking in accordance with EN ISO 4628-4 and EN ISO 4628-5 are not frequently observed in humidity testing, bu

48、t shall also be evaluated if they occur. 9 Expression of results The results shall be expressed as: Overall surface: degree of blistering degree of rusting Edges, scribes and bends: the type of defect: filiform corrosion, delamination and corrosion, blistering, rust (white or red). for each type of

49、defect the measurements shall be given: mean and maximum length and/or size of defects in millimetres, percentage area of edge, scribe or bend affected. Any other observation. 10 Precision No precision data are currently available. 11 Test report The test report shall contain at least the following information: a) all details necessary to identify the product tested; b) a reference to this part of EN 13523 (EN