BS-EN-12502-3-2004.pdf
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1、BRITISH STANDARD BS EN 12502-3:2004 Protection of metallic materials against corrosion Guidance on the assessment of corrosion likelihood in water distribution and storage systems Part 3: Influencing factors for hot dip galvanised ferrous materials The European Standard EN 12502-3:2004 has the statu
2、s of a British Standard ICS 23.040.99; 77.060; 91.140.60 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12502-3:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 Januar
3、y 2005 BSI 20 January 2005 ISBN 0 580 45296 4 National foreword This British Standard is the official English language version of EN 12502-3:2004. The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/8, Corrosion of metals and alloys, which has the responsibility to:
4、A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International St
5、andards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Stand
6、ard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Europea
7、n developments and promulgate them in the UK. Summary of pages 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 notice displayed in this document indicates when the document was last issued. Amend
8、ments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12502-3 December 2004 ICS 77.060; 23.040.99; 91.140.60 English version Protection of me
9、tallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems - Part 3: Influencing factors for hot dip galvanised ferrous materials Protection des matriaux mtalliques contre la corrosion - Recommandations pour lvaluation du risque
10、de corrosion dans les installations de distribution et stockage deau - Partie 3 : Facteurs considrer pour les mtaux ferreux galvaniss chaud Korrosionsschutz metallischer Werkstoffe - Hinweise zur Abschtzung der Korrosionswahrscheinlichkeit in Wasserverteilungs- und speichersystemen - Teil 3: Einflus
11、sfaktoren fr schmelztauchverzinkte Eisenwerkstoffe This European Standard was approved by CEN on 22 November 2004. 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
12、alteration. Up-to-date lists and bibliographical 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 t
13、ranslation under the responsibility 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greec
14、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre:
15、 rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12502-3:2004: E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12502-3:2004 (E)
16、 2 Contents Page Foreword3 Introduction.4 1 Scope 5 2 Normative references5 3 Terms, definitions, and symbols5 3.1 Terms and definitions .5 3.2 Symbols5 4 Types of corrosion.6 4.1 General6 4.2 Uniform corrosion7 4.3 Pitting corrosion8 4.4 Selective corrosion11 4.5 Bimetallic corrosion 12 5 Assessmen
17、t of corrosion likelihood13 Bibliography14 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12502-3:2004 (E) 3 Foreword This document (EN 12502-3:2004) has been prepared by Technical Committee CEN/TC 262 “Metallic and other inorganic coati
18、ngs”, 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. This sta
19、ndard is in five parts: Part 1: General; Part 2: Influencing factors for copper and copper alloys; Part 3: Influencing factors for hot dip galvanized ferrous material; Part 4: Influencing factors for stainless steels; Part 5: Influencing factors for cast iron, unalloyed and low alloyed steels. Toget
20、her these five parts constitute a package of interrelated European Standards with a common date of withdrawal (dow) of 2005-06. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, B
21、elgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun
22、, na, Sat Oct 28 07:00:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12502-3:2004 (E) 4 Introduction This document results mainly from investigations into and experience gained of the corrosion of hot dip galvanized ferrous materials, used as steel tubes and cast iron fittings (galvanized product
23、s), in drinking water distribution systems in buildings. However, it can be applied analogously to other water systems. The corrosion likelihood of galvanized products depends on the formation of a corrosion product layer, which begins to form as soon as the galvanized surface comes in contact with
24、water. The more this layer prevents ionic and electronic exchanges between the metal and water, the more protective it will be and the higher the durability of the galvanized products. Drinking water systems with galvanized products, although showing visible corrosion effects, are, in general, resis
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