1、BRITISH STANDARD Methods of test for ancillary components ror masonry Part 13 : Determination of resistance to impact, abrasion and corrosion of organic coatings The European Standard EN 846-13:2001 has the status of a British Standard ICs 91.080.30 BS EN 846-1312001 Wk present to the responsible Eu
2、ropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secre
3、tary. Cr oss-r e fer enc e s The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Sta
4、ndards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of p
5、ages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 13 December 2001 ISBN O 580 38784 4 EUROPEAN STANDARD NORME
6、 EUROPENNE EUROPISCHE NORM EN 846-13 August 2001 ICs 91.080.30 English version Methods of test for ancillary components for masonry - Part 13: Determination of resistance to impact, abrasion and corrosion of organic coatings Mthodes dessai pour composants accessoires de maonnerie - Partie 13: Dtermi
7、nation de la rsistance limpact, labrasion et la corrosion des protections organiques Prfverfahren fr Ergnzungsbauteile fr Mauerwerk - Teil 13: Bestimmung der Schlagfestigkeit, des Abriebwiderstands und der Korrosionsbestndigkeit von organischen Beschichtungen This European Standard was approved by C
8、EN on 23 June 2001 CEN members are bound to comply with the CENKENELEC 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 bibliographical references concerning such national standards ma
9、y be obtained on application to the 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 responsibility of a CEN member into its own language and notified to the Manag
10、ement Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
11、EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 846-13:2001 E EN 846
12、-1 3:2001 (E) Con tents Page Foreword . 3 Scope 4 Normative references 4 Principle 4 Sampling . 4 Apparatus 5 Determination of impact resistance 9 Determination of abrasion resistance 10 Accelerated corrosion test . 11 Test report 13 2 EN 846-13:2001 (E) Foreword This European Standard has been prep
13、ared by Technical Committee CEN/TC 125, Masonry, the Secretariat of which is held by BSI. 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 February 2002, and conflicting national standards shall be
14、 withdrawn at the latest by February 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I
15、taly, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 EN 846-1 3:2001 (E) 1 Scope This European Standard specifies a method for determining the level of performance of those organic coatings classified in prEN 845-1 and prEN 845-2 as type 2 applied as
16、a protective system to zinc coated steel plate used in the fabrication of ancillary components for masonry. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in
17、 the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred
18、to applies (including amendments). EN 197-1, Cement - Part 1: Composition, specifications and conformity criteria for common cemen ts. BS 871 : 1981 I, Specification for abrasive paper and cloths. 3 Principle The performance of organic coatings is determined from tests for impact resistance, abrasio
19、n resistance and an accelerated corrosion test. The impact and abrasion resistance are determined using a heavy rigid pendulum apparatus whereby the spring loaded tip of the pendulum strikes the test specimen at a specified distance from bottom dead centre. The accelerated corrosion performance is d
20、etermined from the electrical resistance of the organic coating during a period of exposure to an alkaline solution. 4 Sampling 4.1 Sampling for impact and abrasion tests The minimum number of specimens for each test shall be six, plus two further specimens, if required (see 6.2). Test specimens sha
21、ll be flat plate not less than 300 mm long x 50 mm wide either: - cut from a sample of the product, where practicable; or - purpose made and protected using a process identical to that used to protect the prod u ct. Where specimens are to be cut from a product, they shall be spaced not less than 300
22、 mm apart. NOTE It is critical to use flat plate since any undulations in the metal will cause local high or low spots. Published by the British Standards Institution, 389 Chiswick High Rd., London W4 4AL. 1 4 EN 846-13:2001 (E) 4.2 Sampling for accelerated corrosion test The minimum number of speci
23、mens shall be three, see 8.1 .I. Test specimens shall be flat plate chosen to suit the test cell dimensions (see Figure 3) but shall preferably be not less than 250 mm long x 100 mm wide either: - cut from a sample of the product, where practicable; or - cut from galvanized steel plate to the specif
24、ication used to produce the product. Where specimens are to be cut from a product, they shall be spaced not less than 300 mm apart. 5 Apparatus 5.1 Tolerances The permissible deviation on masses of the apparatus shall be 11 O g and on apparatus dimensions 11 %. 5.2 Impact and abrasion tests apparatu
25、s 5.2.1 Steel pendulum 5.2.2 A typical steel pendulum is shown in Figure 1. Its mass acting at centre of action is 8,71 kg. The pendulum tip for the impact test is 0,5 mm thick and 3 mm wide and made from hardened carbon steel. The form of the tip used is shown in Figure 2. This is attached to the p
26、endulum such as to produce a 3 mm wide impact strip (.e. with the flat dimension perpendicular to the swing direction of the pendulum). 5.2.3 The pendulum tip used for the abrasion test is of hemi-cylindrical profile, radius 12,5 mm and length 12 mm, and made from hardened carbon steel. The tip is c
27、overed with first quality blue twill emery cloth conforming to the requirements of grade No. 1 of BS 871:1981. NOTE At present there is no European Standard or International standard which covers the type and grade of the emery cloth used with the pendulum apparatus. Accordingly, it has been agreed
28、to refer to British Standard 871. 5 EN 846-1 3:2001 (E) Dimensions in millimetres h. i i i Key a d E, h L P“ a x 6 1 I 21 - I I I Surface marring at area of initial impact; no galvanized surface exposed; Key a Point of impact b Centre of test arc c Coated area of specimen d Exposed galvanized area 1
29、 2 3 Figure 4 -Assessment of impact test results coating marked but not cut through along areas of swing. Coating gouged at area of initial impact; galvanized surface exposed but no flaking; coating marked but not cut through along areas of swing. Coating gouged at areas of initial and first subsidi
30、ary impact and also possibly at additional high spots; galvanized surface exposed but no flaking at edges; coating marked but not cut through along other areas of swing. Coating gouged at areas of initial and subsidiary impact; scraping; not more than 25 % of test area having exposed galvanizing; sl
31、ight flaking at edges; coating marked along areas of swing. Table 1 -Classification of impact test results I Resistance I Description (See also Figure 4) I 7 Determination of abrasion resistance 7.1 Procedure Test each of the specimens as follows. a) Place the specimen below the pendulum with its ed
32、ges parallel to the line of swing of the pendulum. b) Set the pendulum with the abrasion resistance tip to the position shown in Figure 1 and release it from a height of 850 mm. c) After impact, remove the specimen and examine its surface. 10 EN 846-13:2001 (E) After each test, check the pendulum ti
33、p for wear and/or damage. Regrind or renew as necessary. 7.2 Assessment of results Assess and classify the results of the abrasion test as follows. a) The protective coating is intact, with no part of the zinc coating exposed b) The protective coating on five specimens is intact, but the coating on
34、the sixth specimen is exposed, and tests on two further test specimens retain their protective coatings intact. c) As b) above, but if either of the two further specimens has any part of the zinc coating exposed. d) In all other cases. 8 Accelerated corrosion test 8.1. Preparation of steel test pane
35、ls Apply a type of protective coating that has passed the impact and abrasion tests described in 7.1 and 8.1 to the steel test panels, using the same method and pre-treatment as that to be used to coat the product during manufacture. Inspect the panels to determine the quality of the surface and any
36、 visible defects, such as voids, cracks, runs or sags. Check for discontinuities in the protective coating, using the holiday detector. If defects are found in any test panel, reject the panel and prepare a new panel. 8.2 Preparation of alkaline solution Add 300 g of Portland Cement, conforming to E
37、N 197-1 type CEM I, to one litre of deionized water. Stir for not less than 1/2 h. Allow to settle. Ensure that the pH of the clear liquid is 12,6 f 0,1, adjusting to this value if necessary. Decant off the liquid. 8.3 Procedure Test the panels as follows: a) Attach the test cells to not less than t
38、hree prepared test panels using an epoxy resin adhesive compatible with the paint coating to seal the outer edges of the cell. b) Allow the adhesive not less than 24 h to set. c) Fill the cells with alkaline solution (see 8.1.2) to a height of 30 mm. d) Position a platinum electrode in the solution
39、25 mm above each test panel. e) Connect a lead from one side of the a.c. resistance bridge to the substrate steel of each panel and the corresponding lead from the other side of the resistance bridge to the appropriate platinum electrode. 11 EN 846-1 3:2001 (E) f) Measure the resistance of each pane
40、l, using the a.c. resistance bridge, at appropriate intervals (see Figure 5) for not less than 90 days. g) Plot the readings obtained from (f) on a graph showing resistance against time. NOTE To keep the graph compact, a log scale should be used for the resistance values. A typical graph is shown in
41、 Figure 5. 8.4 Assessment of results If the resistance of all the test panels does not fall below 350 kR at any time during the test, the type of protective coating shall be accepted. If the resistance of any panel falls below 350 kR the type and/or thickness of protective coating shall be rejected.
42、 12 EN 846-13:2001 (E) 10 10 O 20 Key 1 Resistance, R (log scale) 2 Time, days 40 2 _ _i_.- I 60 80 1 O0 Figure 5 - Typical resistance time curve for a satisfactory 9 Test report The test report shall include the following information : a) the number, title and date of issue of this European Standar
43、d; b) the place, date and time of taking the samples; c) the name of the laboratory; d) the date of testing the specimens for impact and abrasion; e) the end date of the accelerated corrosion test; coating f) the results of the impact test (individual results and the overall assessment); 13 EN 846-1
44、 3:2001 (E) g) the results of the abrasion test (individual results and the overall assessment); h) the results of the accelerated corrosion test (individual values of electrical resistance and the overall assessment); i) remarks, if any. 14 BS EN 846-1 3 1200 1 BSI 389 Chiswick High Road Lon don w4
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