1、BS EN10244-2:2009ICS 25.220.40; 77.140.65NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDSteel wire and wireproducts Non-ferrous metalliccoatings on steel wirePart 2: Zinc or zinc alloy coatingsThis British Standardwas published under theauthority of the Standar
2、dsPolicy and StrategyCommittee on 31 May2009. BSI 2009ISBN 978 0 580 62603 6Amendments/corrigenda issued since publicationDate CommentsBS EN 10244-2:2009National forewordThis British Standard is the UK implementation of EN 10244-2:2009. Itsupersedes BS EN 10244-2:2001 which is withdrawn.The UK parti
3、cipation in its preparation was entrusted to TechnicalCommittee ISE/26, Steel wire.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 co
4、rrect application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 10244-2:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10244-2April 2009ICS 25.220.40; 77.140.65 Supersedes EN 10244-2:2001 English VersionSteel wire and wire products - Non-ferrous metalli
5、c coatings onsteel wire - Part 2: Zinc or zinc alloy coatingsFils et produits trfils en acier - Revtements mtalliquesnon ferreux sur fils dacier - Partie 2 : Revtement de zincou dalliage de zincStahldraht und Drahterzeugnisse - berzge ausNichteisenmetall auf Stahldraht - Teil 2: berzge aus Zinkund Z
6、inklegierungenThis European Standard was approved by CEN on 20 December 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and biblio
7、graphical references concerning such nationalstandards may be obtained on application to the CEN Management 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 translationunder the responsibility of a
8、 CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, I
9、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 B
10、russels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10244-2:2009: EBS EN 10244-2:2009EN 10244-2:2009 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Coating requirements 54.1 Requir
11、ements for the coatings material 54.2 Requirements relating to coating on the wire 64.2.1 Coating mass .64.2.2 Appearance of coating 64.2.3 Dipping test 64.2.4 Special finishes 84.2.5 Adherence of coating 85 Test conditions . 105.1 Selection of samples 105.2 Determination of mass of coating . 105.2.
12、1 General . 105.2.2 Gravimetric method 105.2.3 Gaseous volumetric method . 115.3 Dipping test . 165.3.1 Principle . 165.3.2 Reagents 165.3.3 Preparation of test piece 175.3.4 Performing of the test 175.3.5 Interpretation of results . 17Bibliography . 18BS EN 10244-2:2009EN 10244-2:2009 (E) 3 Forewor
13、d This document (EN 10244-2:2009) has been prepared by Technical Committee ECISS/TC 30 “Steel wires”, the secretariat of which is held by AFN0R. 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 Oct
14、ober 2009, and conflicting national standards shall be withdrawn at the latest by October 2009. 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 any or all such paten
15、t rights. This document supersedes EN 10244-2:2001. Some significant technical changes from the previous edition of this standard have been made like the addition of new mass requirements for a coating of Zn95AI5 (in Table 2, see E) and the correction of the Formula in 5.2.3.6 “Expression of results
16、“. This European Standard for non-ferrous metallic coating on steel wire is made up of the following parts: Part 1: General principles Part 2: Zinc or zinc alloy coatings Part 3: Aluminium coatings Part 4: Tin coatings Part 5: Nickel coatings Part 6: Copper, bronze or brass coatings According to the
17、 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, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
18、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 10244-2:2009EN 10244-2:2009 (E) 4 1 Scope This part of this European Standard specifies the requirement for coating mass, other properties and testing of
19、 zinc and zinc alloy coatings on steel wire and steel wire products of circular or other section. 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
20、 edition of the referenced document (including any amendments) applies. EN 1179, Zinc and zinc alloys Primary zinc EN 10218-1, Steel wire and wire products General Part 1: Test methods EN 10244-1:2009, Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 1: General principle
21、s ISO 7802, Metallic materials - Wire - Wrapping test ISO 7989-2:2007, Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 2: Zinc or zinc-alloy coating ASTM B 750, Standard Specification for GALFAN (Zinc-5% Aluminium-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings. 3
22、Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 wire with zinc or zinc alloy coating wire to which zinc or zinc alloy coating has first been applied to protect it against corrosion. NOTE The coating method may be hot dipping in a bath of molten
23、 zinc or by means of an aqueous solution of suitable electrolyte. In the hot dipping process wiping media may be used to modify the mass of coating 3.2 zinc or zinc alloy coating zinc to which deliberately other elements are added in order to obtain particular characteristics. NOTE In all cases the
24、quantity of zinc in the alloy shall be minimum 50 %. The most common alloy elements are aluminium, tin, nickel but other elements may also be considered 3.3 mass of coating mass of zinc per unit of surface area expressed in grams per square metre of surface of bare wire BS EN 10244-2:2009EN 10244-2:
25、2009 (E) 5 Table 1 Mass requirements for a coating of Zn Diameter d mm Classes aA AB B C D A x 3b g/m2 g/m2g/m2g/m2g/m2g/m20,15 d 0,20 15 10 0,20 d 0,25 30 20 20 20 15 0,25 d 0,32 45 30 30 25 15 0,32 d 0,40 60 30 30 25 15 0,40 d 0,50 85 55 40 30 15 0,50 d 0,60 100 70 50 35 20 0,60 d 0,70 115 80 60 4
26、0 20 0,70 d 0,80 130 90 60 45 20 0,80 d 0,90 145 100 70 50 20 0,90 d 1,00 155 110 70 55 25 1,00 d 1,20 165 115 80 60 25 1,20 d 1,40 180 125 90 65 25 540 1,40 d 1,65 195 135 100 70 30 585 1,65 d 1,85 205 145 100 75 30 615 1,85 d 2,15 215 155 115 80 40 645 2,15 d 2,50 230 170 125 85 45 690 2,50 d 2,80
27、 245 185 125 95 45 735 2,80 d 3,20 255 195 135 100 50 765 3,20 d 3,80 265 210 135 105 60 795 3,80 d 4,40 275 220 135 110 60 825 4,40 d 5,20 280 220 150 110 70 840 5,20 d 8,20 290 110 80 870 8,20 d 10,00 300 110 80 900 aThe coating class with a designation starting with A relates to thick coatings (g
28、enerally final coating). Designations ending in B relate to classes usually but not always obtained by (zinc coating) and subsequent drawing. Classes C and D are standard classes for low mass coating which are usually produced but not exclusively, produced by hot zinc dipping and then wiping. bA x 3
29、 relates to very high mass requirement three times higher than class A. Other multiples of Class A are possible and these classes will be identified in the same way, e.g. A x 4. 4 Coating requirements 4.1 Requirements for the coatings material The zinc or zinc alloy used for the coating shall comply
30、 with the standard EN 1179. For zinc-alloy grades not mentioned in the EN the alloy shall be specified at the enquiry and order. For Zn95Al5 reference is made to ASTM B 750 with or without mischmetal (MM).11) Mischmetal is a mixture of rare earth metals (La and others) which is a by product from zin
31、c production. BS EN 10244-2:2009EN 10244-2:2009 (E) 6 The ingot of the material used for the zinc coating shall be of minimum 99,95 % purity (according to Z3 of EN 1179) unless otherwise stated in the relevant product standard or other specification in the order. Coatings applied by electrolysis sha
32、ll contain a minimum of 99 % zinc. 4.2 Requirements relating to coating on the wire 4.2.1 Coating mass The minimum mass of zinc per unit of surface area of the wire shall comply with the requirements of Table 1. If no class of zinc coating or no coating mass is specified the coating shall be called
33、“regular coating“. Such a coating shall be not less than 1 g zinc mass per Kg of zinc coated wire (equivalent to the coating mass in g/m2not less than two times the wire diameter expressed in mm). The requirements for zinc-aluminium coatings of type Zn95Al 5 are given in Table 2. For other zinc allo
34、y coatings, the manufacturer and supplier shall agree on the required coating mass. 4.2.2 Appearance of coating The coating applied to the wire shall be reasonably smooth and as evenly distributed as industrial technology allows and not show discontinuities such as bare patches, dross contamination,
35、 etc. NOTE The Zn95Al5 zinc-aluminium alloy might show difference in colour and become darker with time. This does not affect the corrosion protection performance. 4.2.3 Dipping test When specified the dipping (immersion) test shall be carried out according to the procedure detailed in 5.3. However,
36、 it should be pointed out that there is no correlation between the number of dips and the mass of the coating and that the result is influenced as much by the conditions of manufacture of the coating as by the uniformity of the coating. Table 3 gives the minimum number of immersions for coatings of
37、classes A and AB. The dipping test does not apply to class B, C and D. BS EN 10244-2:2009EN 10244-2:2009 (E) 7 Table 2 Mass requirements for a coating of Zn95Al5 Diameter mm Mass of coating ag/m2A AB B E b0,20 d 0,25 20 20 40 0,25 d 0,40 30 300,40 d 0,50 85 55 400,50 d 0,60 100 70 50 0,60 d 0,70 115
38、 80 600,70 d 0,80 130 90 600,80 d 0,90 145 100 70 0,90 d 1,00 155 110 701,00 d 1,20 165 115 801,20 d 1,40 180 125 90 60 1,40 d 1,65 195 135 1001,65 d 1,85 205 145 1001,85 d 2,15 215 155 115 2,15 d 2,50 230 170 1252,50 d 2,80 245 185 1252,80 d 3,20 255 195 135 3,20 d 3,80 265 210 1353,80 d 4,40 275 2
39、20 1354,40 d 5,20 280 220 150 5,20 d 8,20 290 8,20 d 10,00 300aThe coating class with a designation starting with A relates to thick coatings (generally final coating). Designations ending in B relate to classes usually but not always obtained by (zinc coating) and subsequent drawing. bthe corrosion
40、 resistance of this class E must be at least equivalent of these from a zinc coating according Table 1 class B Table 3 Minimum number of dips Nominal diameter mm Class A of coating Class AB of coating Number of dips Number of dips of 1 min of 1/2 min of 1min of 1/2 min 0,40 d 0,60 1 0,60 d 0,90 1 1
41、0,90 d 1,00 1 1 1,00 d 1,40 1 1,40 d 1,65 2 1,65 d 1,85 1 1,85 d 2,15 2 1 2,15 d 2,80 2 1 1 2,80 d 4,40 3 2 4,40 d 5,20 3 1 5,20 d 8,20 8,20 d 10,00 4 BS EN 10244-2:2009EN 10244-2:2009 (E) 8 4.2.4 Special finishes If drawing after galvanising is required it shall be stipulated at the time of enquiry
42、 and order or in the appropriate product standard. The same also applies for other special finishes such as wax coating, a polished surface or an exceptionally smooth surface. 4.2.5 Adherence of coating 4.2.5.1 During the test carried out in accordance with EN 10218-1, the coating shall adhere to th
43、e steel when subjected to the conditions of wrapping test for adherence. It shall not crack or split to such an extent that slivers of coating can be removed by simply rubbing with the bare fingers. The loosening or detachment during testing of small particles of zinc resulting from mechanical polis
44、hing of the surface of the zinc or zinc alloy coating shall not be considered to be a cause for rejection. The wrapping test is defined in ISO 7802 and specific requirements for wires are defined in EN 10244-1:2009, 5.3. 4.2.5.2 Assessment of adherence To assess the adherence of the coating as may b
45、e specified in the relevant product standard or for evaluating different conditions of manufacturing the following procedure may be applied. Coil the wire around its own diameter compare to the reference chart (see Figure 1). Allocate a value of 1 to 5 to the quality of adherence of the coating in a
46、ccordance with the reference chart in Figure 1. BS EN 10244-2:2009EN 10244-2:2009 (E) 9 Key Descending scale based on quality of adherence from 1 (highest quality) to 5 (lowest quality) (see 4.2.5.2) Figure 1 Assessment of the adherence of the coating BS EN 10244-2:2009EN 10244-2:2009 (E) 10 5 Test
47、conditions 5.1 Selection of samples 5.1.1 The number and the basis for the selection of test pieces shall be defined in the product standard. In the absence of such a standard, the manufacturer and purchaser shall agree between them on the degree of sampling. 5.1.2 When taking the samples, care shal
48、l be taken to avoid damaging the surface. Parts of the wire which are visibly damaged shall not be used. 5.1.3 A test piece of wire, which is of a suitable length for the specified tests shall be taken from one or both ends of each reel selected for sampling. In the case of coated wire products, the product standard shall specify the length of the samples to be taken. 5.2 Determination of mass of coating 5.2.1 General In the case of wire with a zinc or zinc alloy coating, the mass of the coating shall be determined either by the gravimetric method or t
