1、BRITISH STANDARD BS EN ISO 1460:1995 Metallic coatings Hotdip galvanized coatings on ferrous materials Gravimetric determination of the mass per unit area The European Standard EN ISO 1460:1994 has the status of a British StandardBSENISO1460:1995 This British Standard, having been prepared under the
2、 directionof the Sector Board for Materials and Chemicals, waspublished under the authorityof the Standards Boardand comes into effect on 15 May 1995 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference STI/34 Draft announced in BSI News March 1995 ISBN 0
3、 580 23973 X Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee STI/34, Hot dip galvanized coatings, upon which the following bodies were represented: British Constructional Steelwork Association Ltd. British Iron and Steel
4、Producers Association Department of Transport Galvanizers Association Amendments issued since publication Amd. No. Date CommentsBSENISO1460:1995 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Principle 3 3 Stripping solution 3 4 Samp
5、ling 3 5 Procedure 3 6 Expression of results 3 7 Test report 3BSENISO1460:1995 ii BSI 10-1999 National foreword This British Standard has been prepared by Technical Committee STI/34, and is the English language version of ENISO1460:1994 Metallic coatings Hot dip galvanized coatings on ferrous materi
6、als Gravimetric determination of the mass per unit area, published by the European Committee for Standardization (CEN). It was derived by CEN from ISO1460:1992, published by the International Organization for Standardization (ISO). A British Standard does not purport to include all the necessary pro
7、visions 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 pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title pa
8、ge, pages2 and 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 1460 October 1994 ICS 25.220.40 Descriptor
9、s: Coatings, metal coatings, zinc coatings, hot dip galvanizing, density measurement, gravimetric analysis English version Metallic coatings Hot dip galvanized coatings on ferrousmaterials Gravimetric determination of the massper unit area (ISO 1460:1992) Revtements mtalliques Revtements de galvanis
10、ation chaud sur mtaux ferreux Dtermination gravimtrique de la masse par unit de surface (ISO 1460:1992) Metallische berzug Feuerverzinkung auf Eisenwerkstoffen Gravimetrisches Verfahren zur Bestimmung der Masse pro Flascheneinheit (ISO 1460:1992) This European Standard was approved by CEN on1994-10-
11、26. CEN members are bound to comply with the CEN/CENELEC 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 may be obtained
12、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 of a CEN member into its own language and notified to the Central Secretari
13、at 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, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for
14、Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN ISO 1460:1994 EENISO1460:1994 2 BSI 10-1999 Foreword This European Standard has been taken over by the Technical C
15、ommittee CEN/TC262, Protection of metallic materials against corrosion, from the work of ISO/TC17, Metallic and other inorganic coatings, of the International Organization for Standardization (ISO). This document was submitted to the formal vote and was adopted by CEN as a European Standard. This Eu
16、ropean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April1995, and conflicting national standards shall be withdrawn at the latest by April1995. In accordance with the CEN/CENELEC Internal Regulations, follo
17、wing countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.ENISO1460:1994 BSI 10-1999 3 1 Scope This International Standard
18、 specifies a method of determining 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 applicable to shapes whose areas are easy to determine. If, with heavy samples, the s
19、pecifications of clause5 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
20、 after the coating is dissolved. 3 Stripping solution Dissolve 3,5g of hexamethylenetetramine in500ml of concentrated hydrochloric acid ( =1,19g/ml). Dilute this solution to1000ml 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 than1% of the presumed coating mass. The quantity of solution shall be measured so that at least
22、10ml 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 origin
23、ally brisk evolution of hydrogen. The sample shall then be rinsed in running water and, if necessary, 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 previous paragraph. After weighing, th
24、e surface area A of the exposed surface shall be determined to an accuracy of1%. 6 Expression of results 6.1 Method of calculation Calculate the mass per unit area A , of the hot dip galvanized coating, expressed in grams per square metre, from the equation where NOTE 1With steel wire, it is often a
25、dvantageous to calculate the mass per unit area, A , of a hot dip galvanized coating, expressed in grams per square metre, using the equation where D is the diameter, in millimetres, of the wire after stripping, and the density of steel is taken as7,84g/cm 3 . In this way, it is not necessary to kno
26、w the length of the wire. 6.2 Reproducibility The reproducibility (different observers, different apparatus and operating conditions) is about 5% 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 dimen
27、sions of the sample; c) the method 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 micrometres 1) . m 1 is the mass, in grams, of the sample before strip
28、ping; m 2 is the mass, in grams, of the sample after stripping; A is the area, in square millimetres, of the exposed surface of the sample. 1) The approximate thickness, d, of the hot dip galvanized coating, in micrometres, can be calculated from the equation which assumes that the density of the co
29、ating is7,2 g/cm 3 . A m 1 m 2 A -10 6 = A 7,8410 3 4 -D m 1 m 2 m 2 - = d A 7,2 - =BS EN ISO 1460:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Eur
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