BS EN 12502-3-2004 金属材料防腐蚀保护.配水和蓄水系统中腐蚀可能性的评价指南.第3部分热浸镀锌亚铁材料的影响因素1.pdf
《BS EN 12502-3-2004 金属材料防腐蚀保护.配水和蓄水系统中腐蚀可能性的评价指南.第3部分热浸镀锌亚铁材料的影响因素1.pdf》由会员分享,可在线阅读,更多相关《BS EN 12502-3-2004 金属材料防腐蚀保护.配水和蓄水系统中腐蚀可能性的评价指南.第3部分热浸镀锌亚铁材料的影响因素1.pdf(18页珍藏版)》请在三一文库上搜索。
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 ? BS EN 12502-3:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 January 2005 BSI 20 January 2005 ISBN 0 580 45296 4 National foreword This British Standard is the official Engli
3、sh 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: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-re
4、ferences 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 Standards Correspondence Index” , or by using the “ Search” facility of the BSI Electronic Catalogue or of B
5、ritish 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 Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pre
6、sent 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 European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an
7、 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. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM E
8、N 12502-3 December 2004 ICS 77.060; 23.040.99; 91.140.60 English version 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 Protection
9、 des matriaux mtalliques contre la corrosion - Recommandations pour lvaluation du risque 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
10、Korrosionswahrscheinlichkeit in Wasserverteilungs- und speichersystemen - Teil 3: Einflussfaktoren 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 co
11、nditions 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 Central Secretariat or to any CEN member. This European Standard exists in thr
12、ee 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 Secretariat has the same status as the official versions. CEN members are the national standards bodies of Au
13、stria, Belgium, 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. EUROPEAN COMMITTEE FOR STANDAR
14、DIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: 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 EN 12502-3:2004 (E) 2 Contents Page F
15、oreword3 Introduction.4 1Scope 5 2Normative references5 3Terms, definitions, and symbols5 3.1Terms and definitions .5 3.2Symbols5 4Types of corrosion.6 4.1General6 4.2Uniform corrosion7 4.3Pitting corrosion8 4.4Selective corrosion11 4.5Bimetallic corrosion 12 5Assessment of corrosion likelihood13 Bi
16、bliography14 ? 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 coatings” , the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by pub
17、lication 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 standard is in five parts: Part 1: General; Part 2: Influencing factors for copper and copper alloys; Part 3: Influencing factors for ho
18、t dip galvanized ferrous material; Part 4: Influencing factors for stainless steels; Part 5: Influencing factors for cast iron, unalloyed and low alloyed steels. Together these five parts constitute a package of interrelated European Standards with a common date of withdrawal (dow) of 2005-06. Accor
19、ding to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuan
20、ia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. ? 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,
21、used as steel tubes and cast iron fittings (galvanized products), 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
22、 form as soon as the galvanized surface comes in contact with 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, alth
23、ough showing visible corrosion effects, are, in general, resistant to corrosion damage in normal use. However, there are conditions under which they will sustain corrosion damage. As a result of the complex interactions between the various influencing factors, the extent of corrosion can only be exp
24、ressed in terms of likelihood. This document is a guidance document and does not set explicit rules for the use of hot dip galvanized ferrous materials in water systems. It can be used to minimize the likelihood of corrosion damages occurring by: assisting in designing, installing and operating syst
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