1、BRITISH STANDARD CEN EN*ISO*1460 94 3404589 0092189 428 = Metallic coatings - Hot dip galvanized coatings on ferrous materials - Gravimetric determination of the mass per unit area I The European Standard EN IS0 1460 : 1994 has the status of a British Standard BS EN IS0 1460 : 1995 CEN EN*ISO*3460 7
2、4 = 340Y587 0072370 LYT BS EN IS0 1460 : 1995 Amd. No. O BSI 1995 Committees responsible for this British Standard Date Text affected The preparation of this British Standard was entrusted to Technical Committee STI/34, Hot dip galvanized coatings, upon which the following bodies were represented :
3、British Constructional Steelwork Association Ltd. British Iron and Steel Producers Association Department of Transport Galvanizers Association This British Standard, having been prepared under the direction of the Sector Board for Materiais and Chemicals, was published under the authority of the Sta
4、ndards Board and comes into effect on 15 May 1995 Amendments issued since publication The following BSI references relate to the work on this standard: Committee reference STI/34 Draft announced in BSI News March 1995 ISBN O 680 23973 X , , CEN EN*ISO*1460 94 3404589 0092193 O8b BS EN IS0 1460 : 199
5、5 Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Method 1 Scope 3 2 Principle 3 3 Stripping solution 4 Sampling 5 Procedure 3 3 3 6 Expresion of results 3 7 Test report 4 i CEN EN*ISO*L460 94 3404589 0092392 TL2 BS EN IS0 1460 : 1995 National foreword This Br
6、itish Standard has been prepared by Technical Committee STI/34, and is the English language version of EN IS0 1460 : 1994 Metallic coatings - Hot dip galvanized coatings on ferrous matwals - Gravimetric determination of the mass per unit area, published by the European Committee for Standardization
7、(CEN). It was derived by CEN from IS0 1460 : 1992, published by the International Organization for Standardization (EO). Compliance with a British Standard does not of itself confer immunity from legal obligations. ii CEN EN*ISO*L460 94 = 3404589 0092393 959 EUROPEAN STANDARD NORME EUROPENNE EUROPIS
8、CHE NORM EN IS0 1460 October 1994 ICs 25.220.40 Descriptors: Coatings, metal coatings, zinc coatings, hot dip galvanizing, density measurement, gravimetric analysis English version Metallic coatings - Hot dip galvanized coatings on mass per unit area ferrous materials - Gravimetrie determination of
9、the (IS0 1460 : 1992) Revtements mtalliques - Revtements de galvanisation chaud sur mtaux ferreux Dtermination gravimtrique de la masse par unit de surface Flascheneinheit (IS0 1460 : 1992) Metallische berzug - Feuerverzinkung auf Eisenwerkstoffen - Gravimetrisches Verfahren zur Bestimmung der Masse
10、 pro (IS0 1460 : 1992) This European Standard was approved by CEN on 1994-10-26. 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 bi
11、bliographical references concerning such national standards may be obtained on application to the Central Secretariat 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
12、 of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portuga
13、l, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to CEN members Ref. No. EN IS0 1460 : 1994 E CEN EN*ISO*34b0 9
14、4 m 3404589 0092394 895 m Page 2 EN IS0 1460 : 1994 Foreword This European Standard has been taken over by the %chnical Committee CEN/TC 262, Protection of metallic materials against corrosion, from the work of ISO/Tc 17, Metallic and other inorganic coatings, of the International Organization for S
15、tandardization (ISO). This document was submitted to the formal vote and was adopted by CEN as a European Standard. 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 April 1995, and conflicting nati
16、onal standards shall be withdrawn at the latest by April 1995. In accordance with the CENKENELEC Internal Regulations, following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, Rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
17、ay, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN EN*ISO*L460 94 3404589 0092195 721 Page 3 EN IS0 1460 : 1994 Metallic coatings - Hot dip galvanized coatings on ferrous materials - Gravimetric determination of the mass per unit area 1 Scope This International Standard specifies a met
18、hod of de- termining the mass per unit area of hot dip galvanized coatings on ferrous materials. Since as exact knowledge of the area of the surface is essential, this International Standard is mainly ap- plicable to shapes whose areas are easy to determine. If, with heavy samples, the specification
19、s of clause 5 cannot be met, then the hot dip galvanized coating mass has to be determined by another method. 2 Principle The hot dip galvanized coating on a surface of known area is dissolved in inhibited acid and the resultant loss in mass is determined by weighing the sample before and after the
20、coating is dissolved. 3 Stripping solution Dissolve 3,5 g of hexamethylenetetramine in 500 ml of concentrated hydrochloric acid (p = 1,19 g/mi). Di- lute this solution to 1 O00 ml with distilled water. 4 Sampling The method of sampling shall be agreed between the interested parties. 5 Procedure Wher
21、e necessary, the sample shall be degreased with an organic solvent that does not attack the hot dip galvanized coating, and then dried. Before stripping, the sample shall be weighed to an accuracy better than 1 % of the presumed coating mass. The quantity of solution shall be measured so that at lea
22、st 10 ml of solution are available for each square centimetre of the surface of the sample. The sample shall be completely immersed in the solution at room temperature and left until the coating has completely dissolved. The end of the dissolution process can be recognized by the cessation of the or
23、iginally brisk evolution of hydrogen. The sample shall then be rinsed in running water and, if necesSan/, brushed to remove any loose substance which may be adhering to the surface, dipped in alcohol, quickly dried and again weighed to the accuracy indicated in the previ- ous paragraph. After weighi
24、ng, the surface area A of the exposed surface shall be determined to an accuracy of 1 %. 6 Expression of resuits 6.1 Method of cafculath Calculate the mass per unit area p, of the hot dip galvanized coating, expressed in grams per square metre, from the equation where x lo6 ml m, A is the mass, in g
25、rams, of the sample be fore stripping; is the mass, in grams, of the sample after stripping; is the area, in square millimetres, of the exposed surface of the sample. Page 4 EN IS0 1460 : 1994 NOTE 1 With steel wire, it is often advantageous to cal- culate the mass per unit area, pA, of a hot dip ga
26、lvanized coating, expressed in grams per square metre, using the equation ml-m;! XDX- m;! 7,84 io3 PA= 4 where D is the diameter, in millimetres, of the wire after stripping, and the density of steel is taken as 7,84 g/cm3. In this way, it is not necessary to know the length of the wire. 62 Reprduab
27、ility The reproducibility (different observers, different ap- paratus and operating conditions) is about f 5 OJO of the mean value. 7 Test report The test report shall contain the following information: a) a reference to this International Standard; b) type and dimensions of the sample; c) the metho
28、d of calculating the surface area for shaped samples; d the mass per unit area of coating, in grams per square metre or, if agreed between the interested parties, the thickness of the coating, in micro- metres! 1) The approximate thickness, d, of the hot dip galvanized coating, in micrometres, can b
29、e calculated from the equation which assumes that the density of the coating is 7.2 Fax: 0181 996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information
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32、7001. Copyright Copyright subsists in all BSI publications and no part may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard of necessary details such as symbols and size, type or grade designatio
33、ns including use by incorporation into computer programs, but where these details are reproduced including without limitation in printed form, in computer programs or in any other form whatsoever, the permission in writing of BSI must be obtained and if granted will be on terms including royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright should be made to the Copyright Manager at Chiswick. ISBN O 580 23973 X sTI/34
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