BS EN ISO 14713-2-2009 Zinc coatings - Guidelines and recommendations for the protection against corrosion of iron and steel in structures - Hot dip galvanizing《锌涂层 建筑物中钢铁腐蚀防护用指南和建.pdf

1、BS EN ISO14713-2:2009ICS 25.220.40; 91.080.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDZinc coatings Guidelines andrecommendations forthe protection againstcorrosion of iron andsteel in structuresPart 2: Hot dip galvanizing (ISO14713-2:2009)Licensed Copy:

2、Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2010 BSI 2010ISBN 978 0 580 62787 3Amendments/corrigenda issued since publicationDate CommentsBS E

3、N ISO 14713-2:2009National forewordThis British Standard is the UK implementation of EN ISO14713-2:2009. Together with BS EN ISO 14713-1:2009 and BS EN ISO 14713-3:2009, it supersedes BS EN ISO 14713:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee

4、STI/34, Hot dip galvanized coatings.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. Compliance with a British St

5、andard cannot confer immunityfrom legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14713-2 December 2009 ICS 25.220.40; 91.080.10 Supersedes EN ISO 14713:1999English Version Z

6、inc coatings - Guidelines and recommendations for the protection against corrosion of iron and steel in structures - Part 2: Hot dip galvanizing (ISO 14713-2:2009) Revtements de zinc - Lignes directrices et recommandations pour la protection contre la corrosion du fer et de lacier dans les construct

7、ions - Partie 2: Galvanisation chaud (ISO 14713-2:2009) Zinkberzge - Leitfden und Empfehlungen zum Schutz von Eisen- und Stahlkonstruktionen vor Korrosion - Teil 2: Schmelztauchverzinken (ISO 14713-2:2009) This European Standard was approved by CEN on 18 November 2009. CEN members are bound to compl

8、y 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 on application to the CEN Manageme

9、nt 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 CEN Management Centre has the same status as the

10、official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia

11、, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for

12、 CEN national Members. Ref. No. EN ISO 14713-2:2009: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIBS EN ISO 14713-2:2009EN ISO 14713-2:2009 (E) 3 Foreword This document (EN ISO 14713-2:2009) has been prepared by Technical Committee ISO/TC 107 “M

13、etallic and other inorganic coatings“ in collaboration with 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 publication of an identical text or by endor

14、sement, at the latest by June 2010, and conflicting national standards shall be withdrawn at the latest by June 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying

15、 any or all such patent rights. This document supersedes EN ISO 14713:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, E

16、stonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 14713-2:2009 has been approved b

17、y CEN as a EN ISO 14713-2:2009 without any modification. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIBS EN ISO 14713-2:2009ISO 14713-2:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and

18、 definitions .2 4 Design for hot dip galvanizing .2 4.1 General .2 4.2 Surface preparation.2 4.3 Procedures related to design considerations 3 4.4 Design features3 4.5 Tolerances3 5 Design for storage and transport 4 6 Effect of article condition on quality of hot dip galvanizing.4 6.1 General .4 6.

19、2 Surface condition 6 6.3 Influence of steel surface roughness on the hot dip galvanized coating thickness6 6.4 Influence of thermal cutting processes 6 6.5 Effect of internal stresses in the basis steel 6 6.6 Large objects or thick steels7 6.7 Hot dip galvanizing practice.7 7 Effect of hot dip galv

20、anizing process on the article 8 7.1 Dimensional tolerances on mating thread8 7.2 Effect of process heat.8 8 After-treatments.8 Annex A (informative) Preferred designs of articles for hot dip galvanizing .9 Bibliography18 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncon

21、trolled Copy, (c) BSIBS EN ISO 14713-2:2009ISO 14713-2:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carrie

22、d out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS

23、O collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Internatio

24、nal Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the ele

25、ments of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14713-2 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 4, Hot dip coatings (galvanized, etc.). This

26、 first edition, together with ISO 14713-1 and ISO 14713-3, cancels and replaces ISO 14713:1999, which has been technically revised ISO 14713 consists of the following parts, under the general title Zinc coatings Guidelines and recommendations for the protection against corrosion of iron and steel in

27、 structures: Part 1: General principles of design and corrosion resistance Part 2: Hot dip galvanizing Part 3: Sherardizing The principal changes to this part of ISO 14713 compared to ISO 14713:1999 are the following. This part of ISO 14713 only provides design guidance for hot dip galvanizing of ar

28、ticles. The normative references (Clause 2) have been updated to take into account the very latest standards available to readers. Additional guidance on the effect of the iron/steel surface composition has been provided (6.1.1, Table 1). Additional information has been provided on the effect of the

29、rmal cutting processes (6.4) and the influence of internal stresses in the basis steel during hot dip galvanizing (6.5). Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIBS EN ISO 14713-2:2009INTERNATIONAL STANDARD ISO 14713-2:2009(E) ISO 2009 All ri

30、ghts reserved 1Zinc coatings Guidelines and recommendations for the protection against corrosion of iron and steel in structures Part 2: Hot dip galvanizing 1 Scope This part of ISO 14713 provides guidelines and recommendations regarding the general principles of design which are appropriate for art

31、icles to be hot dip galvanized for corrosion protection. The protection afforded by the hot dip galvanized coating to the article will depend upon the method of application of the coating, the design of the article and the specific environment to which the article is exposed. The hot dip galvanized

32、article can be further protected by application of additional coatings (outside the scope of this part of ISO 14713), such as organic coatings (paints or powder coatings). When applied to hot dip galvanized articles, this combination of coatings is often known as a “duplex system”. The guidelines an

33、d recommendations in this part of ISO 14713 do not deal with the maintenance of corrosion protection in service for steel with hot dip galvanized coatings. Guidance on this subject can be found in ISO 12944-5. Specific product-related requirements (e.g. for hot dip galvanized coatings on tubes or fa

34、steners, etc.) will take precedence over these general recommendations. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced

35、 document (including any amendments) applies. ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles Specifications and test methods ISO 4964, Steel Hardness conversions ISO 8044, Corrosion of metals and alloys Basic terms and definitions ISO 10684, Fasteners Hot dip galvanized

36、coatings ISO 12944-5, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 5: Protective paint systems EN 10210-1, Hot finished structural hollow sections of non-alloy and fine grain steels Part 1: Technical delivery requirements EN 10219-1, Cold formed weld

37、ed structural hollow sections of non-alloy and fine grain steels Part 1: Technical delivery requirements Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIBS EN ISO 14713-2:2009ISO 14713-2:2009(E) 2 ISO 2009 All rights reservedEN 10240, Internal and/o

38、r external protective coatings for steel tubes Specification for hot dip galvanized coatings applied in automatic plants EN 10346, Continuously hot-dip coated steel flat products Technical delivery conditions 3 Terms and definitions For the purposes of this document, the terms and definitions given

39、in ISO 8044 and the following apply. 3.1 hot dip galvanizing formation of a coating of zinc and/or zinc/iron alloys on iron and steel products by dipping prepared steel or cast irons in the zinc melt 3.2 hot dip galvanized coating coating obtained by hot dip galvanizing NOTE The term “hot dip galvan

40、ized coating” is subsequently referred to as the “coating”. 4 Design for hot dip galvanizing 4.1 General It is essential that the design of any article required to be finished should take into account not only the function of the article and its method of manufacture but also the limitations imposed

41、 by the finish. Annex A illustrates some of the important design features, some of which are specific to hot dip galvanizing. Some internal stresses in the articles to be galvanized will be relieved during the hot dip galvanizing process and this may cause deformation or damage of the coated article

42、. These internal stresses arise from the finishing operations at the fabrication stage, such as cold forming, welding, oxy-cutting or drilling, and from the residual stresses inherited from the rolling mill. The purchaser should seek the advice of the hot dip galvanizer before designing or making a

43、product that is subsequently to be hot dip galvanized, as it may be necessary to adapt the construction of the article for the hot dip galvanizing process. The purchaser should be aware of the two distinct types of hot dip galvanizing and take these distinctions into account when designing articles:

44、 a) hot dip galvanizing after fabrication where, after suitable pretreatment, fabricated iron or steel articles are dipped in a bath containing a zinc melt (see ISO 1461); b) continuous galvanizing where, after suitable pretreatment, sheet materials are continuously fed through a zinc melt and the h

45、ot dip galvanized sheet materials are then used to fabricate an article (see EN 10346). 4.2 Surface preparation The design and the materials used should permit good surface preparation. This is essential for the production of a high-quality coating (see 6.2). Surfaces should be free from defects to

46、ensure a coating of good appearance and serviceability. Graphite exposed at the surface of iron castings interferes with wetting by molten metal and those castings that have been annealed may have silica particles in the surface layers which have to be removed in order to obtain a good-quality hot d

47、ipped coating. Grit blasting is recommended both before and after annealing. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 09/06/2010 07:18, Uncontrolled Copy, (c) BSIBS EN ISO 14713-2:2009ISO 14713-2:2009(E) ISO 2009 All rights reserved 34.3 Procedures related to design considerations The

48、hot dip bath and associated plant should be of adequate capacity to process the articles to be hot dip coated with zinc. Preferably, articles should be designed to enable coating in a single dipping operation. Articles that are too large for the available baths may be partially immersed and then rev

49、ersed for length or depth, so that a complete coating is obtained. Partial immersion (and then dipping for a second time to complete the coating) is less common than the single, complete immersion operation. All work has to be secured during immersion in the baths. Bolt holes are often available. Lifting lugs are often incorporated to assist general handling. Articles may be held in racks or jigs; some contact marks may be visible after hot dip galvanizing in such cases. The dipping operation involves vertical mo