1、BSI Standards PublicationBS EN 13523-25:2014Coil coated metals TestmethodsPart 25: Resistance to humidityBS EN 13523-25:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13523-25:2014.It supersedes BS EN 13523-25:2006 which is withdrawn.The UK participation i
2、n its preparation was entrusted to TechnicalCommittee STI/21, Surface preparation of steel.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible fo
3、r its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 80216 4ICS 25.220.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy an
4、d Strategy Committee on 30 June 2014.Amendments issued since publicationDate Text affectedBS EN 13523-25:2014EUROPEAN 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 hum
5、idity Tles 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 c
6、onditions 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 ex
7、ists 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 versions. CEN members are the national s
8、tandards 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,
9、 Slovenia, 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 res
10、erved worldwide for CEN national Members. Ref. No. EN 13523-25:2014 EBS EN 13523-25:2014EN 13523-25:2014 (E) 2 Contents 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.
11、2 Exposure in humidity cabinet . 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 BS EN 13523-25:2014EN 13523-25:2014 (E) 3 Foreword
12、This document (EN 13523-25:2014) 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 b
13、y December 2014, and conflicting 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 suc
14、h patent rights. This document 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
15、of the evaluation was amended. 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)
16、 Part 6: Adhesion after indentation (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
17、) Part 12: Resistance to scratching Part 13: Resistance to accelerated ageing by the use of heat Part 14: Chalking (Helmen method) Part 15: Metamerism BS EN 13523-25:2014EN 13523-25:2014 (E) 4 Part 16: Resistance to abrasion Part 17: Adhesion of strippable films Part 18: Resistance to staining Part
18、19: Panel design and 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 2
19、5: Resistance to humidity 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 follow
20、ing 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
21、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13523-25:2014EN 13523-25:2014 (E) 5 1 Scope This Part of EN 13523 specifies a procedure for evaluating the resistance to humidity of an organic coating on a metallic substrate, by me
22、ans of exposure 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,
23、 the latest edition 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
24、uniform changes 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
25、4628-3) EN ISO 4628-4, 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 coat
26、ings Designation 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
27、changes in appearance 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 appe
28、arance Part 10: 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
29、 given in EN 13523-0:2014 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 t
30、ests can be carried out. BS EN 13523-25:2014EN 13523-25:2014 (E) 6 5 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
31、 should also 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 pan
32、els See EN 13523-0. 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
33、 panels shall 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
34、 (5.2) and extend 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 scr
35、ibes arranged 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 separ
36、ated by 20 mm. All scribes shall extend at least 20 mm from the edges (see Figure 2). BS EN 13523-25:2014EN 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 pane
37、ls BS EN 13523-25:2014EN 13523-25:2014 (E) 8 8.2 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 vertica
38、l. 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
39、1 Typical 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 = (4
40、0 3) 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 fu
41、rther 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 con
42、duct 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 a
43、nd 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 wit
44、h EN ISO 4628-3. To determine the time of the on-set of defects, limited intermediate inspections of test panels may be carried out. BS EN 13523-25:2014EN 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, but
45、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 de
46、fect 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 in
47、formation: a) all details necessary to identify the product tested; b) a reference to this part of EN 13523 (EN 13523-25); c) the preparation of the test panel; d) the type of cutting tool used; e) applied test conditions, including duration of the test, temperature, humidity and cycles; f) the resu
48、lts of the test, as indicated in Clause 9; g) any deviation from the test method specified; h) any unusual features (anomalies) observed during the test; i) the date(s) of the test. BS EN 13523-25:2014EN 13523-25:2014 (E) 10 Bibliography 1 EN 1396, Aluminium and aluminium alloys Coil coated sheet an
49、d strip for general applications Specifications 2 EN 10169, Continuously organic coated (coil coated) steel flat products Technical delivery conditions 3 EN ISO 6270-2, Paints and varnishes Determination of resistance to humidity Part 2: Procedure for exposing test specimens in condensation-water atmospheres (ISO 6270-2) This page deliberately left blankBSI is the national body responsible for preparing British St
