1、BS EN13523-8:2010ICS 25.220.60NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDCoil coated metals Test methodsPart 8: Resistance to salt spray (fog)This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 B
2、SI 2010ISBN 978 0 580 64388 0Amendments/corrigenda issued since publicationDate CommentsBS EN 13523-8:2010National forewordThis British Standard is the UK implementation of EN 13523-8:2010. Itsupersedes BS EN 13523-8:2002 which is withdrawn.The UK participation in its preparation was entrusted to Te
3、chnicalCommittee STI/27, Paint systems for metallic substrates.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Co
4、mpliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 13523-8:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13523-8 March 2010 ICS 25.220.60 Supersedes EN 13523-8:2002English Version Coil coated metals - Test methods - Part 8: Resistance to salt spray (fog) T
5、les prlaques - Mthodes dessai - Partie 8: Rsistance au brouillard salin Bandbeschichtete Metalle - Prfverfahren - Teil 8: Bestndigkeit gegen Salzsprhnebel This European Standard was approved by CEN on 20 February 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
6、tipulate 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 Management Centre or to any CEN member. This European Stand
7、ard 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 Management Centre has the same status as the official versions. CEN members are the national sta
8、ndards bodies of Austria, Belgium, 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
9、 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13523-8
10、:2010: EBS EN 13523-8:2010EN 13523-8:2010 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Terms and definitions . 54 Principle 55 Apparatus and materials . 56 Sampling . 67 Test panels . 67.1 General 67.2 Option 1 77.3 Option 2 78 Procedure . 88.1 Test conditions 88.2 Exposure of te
11、st panels 88.3 Evaluation . 89 Expression of results 910 Precision . 911 Test report 10Bibliography 11BS EN 13523-8:2010EN 13523-8:2010 (E) 3 Foreword This document (EN 13523-8:2010) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secretariat of which is held by DIN.
12、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 September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. Attention is drawn to the possibility that so
13、me 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 13523-8:2002. The main technical changes are: a) the text was revised editorially and the normative ref
14、erences were updated; b) specifying the cutting tool and detailing how to make the scribes; c) specifying the direction of cut to control the influence of burrs and cut edges; d) the hole in the test panel was made optional; e) the text was modified to give a clearer description of panel preparation
15、 before evaluation; f) the method for evaluation of corrosion creep was modified. EN 13523, Coil coated metals Test methods, consists of the following parts: Part 0: General introduction and list of test methods Part 1: Film thickness Part 2: Specular gloss Part 3: Colour difference Instrumental com
16、parison Part 4: Pencil hardness Part 5: Resistance to rapid deformation (impact test) 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 fluoresc
17、ent UV radiation and water condensation Part 11: Resistance to solvents (rubbing test) BS EN 13523-8:2010EN 13523-8:2010 (E) 4 Part 12: Resistance to scratching Part 13: Resistance to accelerated ageing by the use of heat Part 14: Chalking (Helmen method) Part 15: Metamerism Part 16: Resistance to a
18、brasion Part 17: Adhesion of strippable films Part 18: Resistance to staining Part 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: Colour stability in humid atmosphe
19、res containing sulfur dioxide Part 24: Resistance to blocking and pressure marking Part 25: 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
20、 the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lat
21、via, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 13523-8:2010EN 13523-8:2010 (E) 5 1 Scope This European Standard specifies the procedures for determining the resistance to salt spray (fog)
22、 of an organic coating on a metallic substrate (coil coating). For steel neutral salt spray (fog) is usually used, and for aluminium acetic acid salt spray (fog). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, o
23、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13523-0:2001, Coil coated metals Test methods Part 0: General introduction and list of test methods EN 13523-7:2001, Coil coated metals Test methods Part 7: Res
24、istance to cracking on bending (T-bend test) EN 13523-19:2004, Coil coated metals Test methods Part 19: Panel design and method for atmospheric exposure testing EN 60454-2, Pressure-sensitive adhesive tapes for electrical purposes Part 2: Methods of test (IEC 60454-2:2007) EN ISO 3696:1995, Water fo
25、r analytical laboratory use Specification and test methods (ISO 3696:1987) 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 in appearance Part 2: Assessment of degree of blistering (ISO 4628-2:2
26、003) 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 appearance Part 8: Assessment of degree of delamination and corrosion around a scribe (ISO 4628-8:2005) EN ISO 9227:2006, Corrosion tests
27、 in artificial atmospheres Salt spray tests (ISO 9227:2006) EN ISO 17872, Paints and varnishes Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing (ISO 17872:2007) 3 Terms and definitions For the purposes of this document, the terms and definitio
28、ns given in EN 13523-0:2001 apply. 4 Principle A test specimen is exposed to a salt spray (fog) for a specified period of time and assessed for possible corrosion expressed by a degree of delamination or corrosion creep and a degree of blistering. 5 Apparatus and materials 5.1 Salt spray cabinet, in
29、 accordance with EN ISO 9227. 5.2 Test solution, as specified in 5.2.1 or 5.2.2 respectively. BS EN 13523-8:2010EN 13523-8:2010 (E) 6 5.2.1 For neutral salt spray fog, the test solution shall be prepared by dissolving sodium chloride in water of at least grade 3 purity as defined in EN ISO 3696:1995
30、 to produce a concentration of (50 5) g/l. The sodium chloride shall be white, of minimum assay 99,6 % (by mass), and substantially free from copper and nickel; it shall contain not more than 0,1 % (by mass) of sodium iodide. If the pH of the solution is outside the range 6,0 to 7,0, the presence of
31、 undesirable impurities in the salt or the water or both shall be investigated. The pH of the test solution shall be adjusted so that the pH of sprayed solution collected within the salt spray cabinet (5.1) is between 6,5 and 7,2. Any necessary adjustment to the pH shall be made by additions of solu
32、tions of either hydrochloric acid or sodium bicarbonate of analytical grade. (See also EN ISO 9227, NSS test.) 5.2.2 For acetic acid salt spray (fog), add a sufficient amount of glacial acetic acid to the sodium chloride solution (5.2.1) to ensure that the pH of sprayed solution collected within the
33、 salt spray cabinet (5.1) is between 3,1 and 3,3. If the pH of the solution initially prepared is 3,0 to 3,1, the pH of the sprayed solution is likely to be within the specified limits. (See also EN ISO 9227, AASS test.) NOTE Under normal conditions, the level of glacial acetic acid required is appr
34、oximately 0,3 % (by mass). 5.3 Cutting tool, with a hard metal tip having a radius or width capable of exposing at least 0,2 mm of metal substrate according to EN ISO 17872. 5.4 Transparent pressure-sensitive adhesive tape, 25 mm wide, with an adhesion strength of (10 1) N per 25 mm width when teste
35、d in accordance with EN 60454-2. 5.5 Sharp drill bit, of diameter approximately 5 mm for creating the hole. 5.6 Appropriate pressing (bending) apparatus, as described in EN 13523-19:2004, 5.2, or EN 13523-7:2001, 5.1.2. 6 Sampling See EN 13523-0. 7 Test panels 7.1 General See EN 13523-0. Design of t
36、he panels: There are two options (7.2 and 7.3), both having the following in common: the protection of edges is optional; if not otherwise specified, the edges of the exposed panels shall be sheared with the burrs away from the test surface; the reverse side shall be protected to stop any corrosive
37、influence from the reverse side to the front side. The protection to the reverse side shall be applied before the drilling of the hole; the scribes shall be prepared by means of the cutting tool (5.3) and extend down just through the coating to the substrate. The scribed indentation shall expose at
38、least 0,2 mm of metal substrate. If the substrate is zinc- or zinc-alloy coated steel, the scribe shall be to the zinc coating, and not down to the steel; optionally, make a hole, of diameter approximately 5 mm, at 25 mm from the bottom edge, at the centre, using the sharp drill bit (5.5). Start the
39、 hole on the test coating so that the burr occurs on the opposite side to the coating under test. BS EN 13523-8:2010EN 13523-8:2010 (E) 7 7.2 Option 1 See Figure 1. The test panel shall have a size of about 200 mm 150 mm and shall be flat. The 200 mm side shall be in the rolling direction of the sub
40、strate (see EN 13523-19). Make two scribes at 90 to each other. The scribes shall be about 40 mm in length with the vertical scribe central to the horizontal but separated by 10 mm. The horizontal scribe shall extend to 50 mm from the bottom edge, the vertical scribe at 60 mm from it. Make a 90 vari
41、able radius bend 25 mm from and parallel to the left 200 mm edge. The variable radius is bent from 1T to 3T as defined in EN 13523-7:2001, 8.2.2. If the test specimen is exposed the bend is at the left side and the tightest radius at the bottom of the specimen. Dimensions in millimetres Figure 1 Tes
42、t panel in accordance with 7.2 (option 1) 7.3 Option 2 See Figure 2. The test panel shall be of suitable size of at least 125 mm 150 mm and shall be flat. The 150 mm side shall be in the rolling direction of the substrate (see EN 13523-19). Two diagonal scribes are carried out crossing each other in
43、 the middle of the specimen and extending to within 15 mm from the edges in order to reach over the bend. Make a variable radius bend 25 mm from the left or right longest edge, in accordance with EN 13523-7:2001, 8.3. The variable radius is bent from 1T to 3T but other bend radii may be agreed betwe
44、en the interested parties depending on the end use of the product. The tightest radius is at the bottom of the panels. BS EN 13523-8:2010EN 13523-8:2010 (E) 8 Dimensions in millimetres Figure 2 Test panel in accordance with 7.3 before bending (option 2) 8 Procedure 8.1 Test conditions Condition the
45、test panels for at least 24 h under laboratory ambient conditions of temperature and humidity. Maintain the cabinet temperature at (35 2) C. Pre-heat the compressed air to the required temperature and saturate it (see EN ISO 9227) before being expanded in the atomiser. Control the amount of condensa
46、te generated during operation in accordance with EN ISO 9227:2006, 4.5, so that 80 cm horizontal surface collect between 1,0 ml and 2,0 ml of condensate per hour. Expose the test panels at an angle of between 15 and 25 to the vertical. The panels shall not influence each other. NOTE It is recommende
47、d to change the position of the individual panels weekly to facilitate a more uniform exposure in the cabinet. Include a reference specimen at the same time for exposure to ensure consistent corrosivity of the cabinet. 8.2 Exposure of test panels Place the test panels in the cabinet and expose for t
48、he specified or agreed period of time. Unless otherwise specified or agreed, expose coated steel panels to neutral salt spray (fog) and coated aluminium panels to acetic acid salt spray (fog). 8.3 Evaluation 8.3.1 General Evaluate the panel at ambient temperature. For a more accurate evaluation, as
49、required for instance in case of dispute, the temperature shall be (23 2) C and the relative humidity (50 5) %, in accordance with EN 23270. BS EN 13523-8:2010EN 13523-8:2010 (E) 9 8.3.2 Blistering Examine the whole surface of each test panel for blistering as described in EN ISO 4628-2 immediately after removal of the test panel from the cabinet and after having washed
