Steel wire and wire products - Non-ferrous metallic coatings on steel wire - Part 2: Zinc or zinc alloy coatings

This part of this European Standard specifies the requirement for coating mass, other properties and testing of zinc and zinc alloy coatings on steel wire and steel wire products of circular or other section.

Stahldraht und Drahterzeugnisse - Überzüge aus Nichteisenmetall auf Stahldraht - Teil 2: Überzüge aus Zink und Zinklegierungen

Dieser Teil der vorliegenden Europäischen Norm legt Anforderungen an Masse, andere Eigenschaften und
Prüfung von Überzügen aus Zink und Zinklegierungen auf Stahldraht und Stahldrahterzeugnissen mit rundem
oder anderem Querschnitt fest.

Fils et produits tréfilés en acier - Revêtements métalliques non ferreux sur fils d'acier - Partie 2 : Revêtement de zinc ou d'alliage de zinc

La présente partie de cette Norme européenne spécifie les exigences en matière de masse de revêtement,
des autres caractéristiques et d’essai des revêtements de zinc et d’alliage de zinc sur fils en acier et produits
dérivés, de section circulaire ou autre.

Jeklena žica in žični izdelki - Neželezne kovinske prevleke na jekleni žici - 2. del: Prevleke iz cinka in cinkovih zlitin

General Information

Status
Published
Publication Date
06-May-2009
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Apr-2009
Due Date
20-Jun-2009
Completion Date
07-May-2009

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stahldraht und Drahterzeugnisse - Überzüge aus Nichteisenmetall auf Stahldraht - Teil 2: Überzüge aus Zink und ZinklegierungenFils et produits tréfilés en acier - Revêtements métalliques non ferreux sur fils d'acier - Partie 2 : Revêtement de zinc ou d'alliage de zincSteel wire and wire products - Non-ferrous metallic coatings on steel wire - Part 2: Zinc or zinc alloy coatings77.140.65Jeklene žice, jeklene vrvi in verigeSteel wire, wire ropes and link chains25.220.40Kovinske prevlekeMetallic coatingsICS:Ta slovenski standard je istoveten z:EN 10244-2:2009SIST EN 10244-2:2009en,de01-junij-2009SIST EN 10244-2:2009SLOVENSKI

STANDARDSIST EN 10244-2:20021DGRPHãþD
SIST EN 10244-2:2009

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10244-2April 2009ICS 25.220.40; 77.140.65Supersedes EN 10244-2:2001

English VersionSteel wire and wire products - Non-ferrous metallic coatings onsteel wire - Part 2: Zinc or zinc alloy coatingsFils et produits tréfilés en acier - Revêtements métalliquesnon ferreux sur fils d'acier - Partie 2 : Revêtement de zincou d'alliage de zincStahldraht und Drahterzeugnisse - Überzüge ausNichteisenmetall auf Stahldraht - Teil 2: Überzüge aus Zinkund ZinklegierungenThis 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 bibliographical 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 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:

Avenue Marnix 17,

B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10244-2:2009: ESIST EN 10244-2:2009

EN 10244-2:2009 (E) 2 Contents Page Foreword ..............................................................................................................................................................31Scope ......................................................................................................................................................42Normative references ............................................................................................................................43Terms and definitions ...........................................................................................................................44Coating requirements ............................................................................................................................54.1Requirements for the coatings material ..............................................................................................54.2Requirements relating to coating on the wire ....................................................................................64.2.1Coating mass .........................................................................................................................................64.2.2Appearance of coating ..........................................................................................................................64.2.3Dipping test ............................................................................................................................................64.2.4Special finishes ......................................................................................................................................84.2.5Adherence of coating ............................................................................................................................85Test conditions ................................................................................................................................... 105.1Selection of samples .......................................................................................................................... 105.2Determination of mass of coating ..................................................................................................... 105.2.1General ................................................................................................................................................. 105.2.2Gravimetric method ............................................................................................................................ 105.2.3Gaseous volumetric method ............................................................................................................. 115.3Dipping test ......................................................................................................................................... 165.3.1Principle ............................................................................................................................................... 165.3.2Reagents .............................................................................................................................................. 165.3.3Preparation of test piece .................................................................................................................... 175.3.4Performing of the test ........................................................................................................................ 175.3.5Interpretation of results ..................................................................................................................... 17Bibliography ..................................................................................................................................................... 18 SIST EN 10244-2:2009

EN 10244-2:2009 (E) 3 Foreword 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 October 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 patent 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". 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 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 10244-2:2009

EN 10244-2:2009 (E) 4 1 Scope This part of this European Standard specifies the requirement for coating mass, other properties and testing of 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 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 principles 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 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 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 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 SIST EN 10244-2:2009

EN 10244-2:2009 (E) 5 Table 1 — Mass requirements for a coating of Zn Diameter d mm Classes a A AB B C D A x 3b g/m2 g/m2 g/m2 g/m2 g/m2 g/m2 0,15 ≤ 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 40 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 < 2,80 245 185 125 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 a The 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. 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. b A x 3 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 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).1

1) Mischmetal is a mixture of rare earth metals (La and others) which is a by product from zinc production. SIST EN 10244-2:2009

EN 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 shall 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 "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/m2 not 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 alloy 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, 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, 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 classes A and AB. The dipping test does not apply to class B, C and D. SIST EN 10244-2:2009

EN 10244-2:2009 (E) 7 Table 2 — Mass requirements for a coating of Zn95Al5 Diameter

mm Mass of coating a
g/m2
A AB B E b 0,20 ≤ d < 0,25 — 20 20

40 0,25 ≤ d < 0,40 — 30 30 0,40 ≤ d < 0,50 85 55 40 0,50 ≤ d < 0,60 100 70 50 0,60 ≤ d < 0,70 115 80 60 0,70 ≤ d < 0,80 130 90 60 0,80 ≤ d < 0,90 145 100 70 0,90 ≤ d < 1,00 155 110 70 1,00 ≤ d < 1,20 165 115 80 1,20 ≤ d < 1,40 180 125 90

60 1,40 ≤ d < 1,65 195 135 100 1,65 ≤ d < 1,85 205 145 100 1,85 ≤ d < 2,15 215 155 115 2,15 ≤ d < 2,50 230 170 125 2,50 ≤ d < 2,80 245 185 125 2,80 ≤ d < 3,20 255 195 135 3,20 ≤ d < 3,80 265 210 135 3,80 ≤ d < 4,40 275 220 135 4,40 ≤ d < 5,20 280 220 150 5,20 ≤ d < 8,20 290 — — 8,20 ≤ d < 10,00 300 — — a The 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. b the corrosion 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 0,90 ≤ d < 1,00 1 1 — 1 1,00 ≤ d < 1,40 1 1 1 — 1,40 ≤ d < 1,65 2 — 1 — 1,65 ≤ d < 1,85 2 — 1 — 1,85 ≤ d < 2,15 2 — 1 1 2,15 ≤ d < 2,80 2 1 1 1 2,80 ≤ d < 4,40 3 — 2 — 4,40 ≤ d < 5,20 3 1 2 — 5,20 ≤ d < 8,20 3 1 — — 8,20 ≤ d < 10,00 4 — — — SIST EN 10244-2:2009

EN 1
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