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 requirements for 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 oder Zinklegierung

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

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

Domaine d'application
La présente partie de la présente norme européenne spécifie les exigences en matiere de masse, des autres caractéristiques et d'essai des revetements de zinc et d'alliage de zinc sur fils en acier de section circulaire ou autre et produits dérivés.

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

General Information

Status
Withdrawn
Publication Date
31-Aug-2002
Withdrawal Date
15-Apr-2009
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
16-Apr-2009
Due Date
09-May-2009
Completion Date
16-Apr-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 oder ZinklegierungFils et produits tréfilés en acier - Revetements métalliques non ferreux sur fils d'acier - Partie 2: Revetements 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 10244-2:2001SIST EN 10244-2:2002en01-september-2002SIST EN 10244-2:2002SLOVENSKI

STANDARD
SIST EN 10244-2:2002

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10244-2March 2001ICS 25.220.40English 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: Revêtements 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 21 January 2001.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 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 Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10244-2:2001 ESIST EN 10244-2:2002

Page 2EN 10244-2:2001ContentsPageForeword....................................................................................................................................31Scope.....................................................................................................................................42Normative reference...............................................................................................................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.............................................................................................................................155.3.1Principle...................................................................................................................................155.3.2Reagents..................................................................................................................................155.3.3Preparation of test piece........................................................................................................165.3.4Performing of the test.............................................................................................................165.3.5Interpretation of results..........................................................................................................16SIST EN 10244-2:2002

Page 3EN 10244-2:2001ForewordThis European Standard has been prepared by Technical Committee ECISS/TC 30 "Steel wires", thesecretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of anidentical text or by endorsement, at the latest by September 2001, and conflicting national standardsshall be withdrawn at the latest by September 2001.This European Standard for non-ferrous metallic coating on steel wire is made up of the followingparts:Part 1 : General principlesPart 2 : Zinc and zinc alloy coatingsPart 3 : Aluminium coatingsPart 4 : Tin coatingsPart 5 : Nickel coatingsPart 6 : Copper, bronze and brass coatingsAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 10244-2:2002

Page 4EN 10244-2:20011 ScopeThis part of this European Standard specifies the requirement for coating mass, other properties andtesting of zinc and zinc alloy coatings on steel wire and steel wire products of circular or other section.2 Normative referenceThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions of anyof these publications apply to this European Standard only when incorporated in it by amendment orrevision. For undated references the latest edition of the publication referred to applies (includingamendments).EN 1179, Zinc and zinc alloys — Primary zincEN 10218-1, Steel wire and wire products – General – Part 1: Test methodsEN 10244-1, Steel wire and wire products — Non-ferrous metallic coatings on steel wire —Part 1: General principlesISO 7989, Zinc coatings for steel wireASTM B 750, Standard Specification for Zinc-5% Aluminium-Mischmetal 1 Alloy in Ingot Form for Hot-Dip Coatings3 Terms and definitionsFor the purposes of this European standard the following terms and definitions apply.3.1wire with zinc or zinc alloy coatingwire to which zinc or zinc alloy coating has first been applied to protect it against corrosion. Thecoating method may be hot dipping in a bath of molten zinc or by means of an aqueous solution ofsuitable electrolyte. In the hot dipping process wiping media may be used to modify the mass ofcoating3.2zinc or zinc alloy coatingzinc alloy is zinc to which deliberately other elements are added in order to obtain particularcharacteristics. In all cases the quantity of zinc in the alloy shall be minimum 50 %. The most commonalloy elements are aluminium, tin, nickel but other elements may also considered3.3mass of coatingthe mass of zinc per unit of surface area is expressed in grams per square metre of surface of barewire

1 Mischmetal is a mixture of rare earth metals (La and others) which is a by product from zinc productionSIST EN 10244-2:2002

Page 5EN 10244-2:2001Table 1 — Mass of coatingDiameter dClasses aAABBCDA x 3bmmg/m2g/m2g/m2g/m2g/m2g/m20,15 d < 0,20--15-100,20 d < 0,2530202020150,25 d < 0,3245303025150,32 d < 0,4060303025150,40 d < 0,5085554030150,50 d < 0,60100705035200,60 d < 0,70115806040200,70 d < 0,80130906045200,80 d < 0,901451007050200,90 d < 1,001551107055251,00 d < 1,201651158060251,20 d < 1,401801259065255401,40 d < 1,6519513510070305851,65 d < 1,8520514510075306151,85 d < 2,1521515511580406452,15 d < 2,5023017012585456902,50 d < 2,8024518512595457352,80 d < 3,20255195135100507653,20 d < 3,80265210135105607953,80 d < 4,40275220135110608254,40 d < 5,20280220150110708405,20 d < 8,20290110808708,20 d 30011080900a The coating class with a designation starting with A relates to thick coatings (generally finalcoating).

Designations ending in B relate to classes usually but not always obtained by (zinccoating) and subsequent drawing. Classes C and D are standard classes for low mass coating whichare 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 ofClass A are possible and these classes will be identified in the same way, e.g. A x 4.4 Coating requirements4.1 Requirements for the coatings materialThe zinc or zinc alloy used for the coating shall comply with the standard EN 1179. For zinc-alloygrades not mentioned in the EN the alloy shall be specified at the enquiry and order. For Zn95Al5reference is made to ASTM B 750 with or without mischmetall (MM).The ingot of the material used for the zinc coating shall be of minimum 99,9 % purity unless otherwisestated in the relevant product standard or other specification in the order. Coatings applied byelectrolysis shall contain a minimum of 99 % zinc.SIST EN 10244-2:2002

Page 6EN 10244-2:20014.2 Requirements relating to coating on the wire4.2.1 Coating massThe minimum mass of zinc per unit of surface area of the wire shall comply with the requirements ofTable 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 thecoating mass in g/m2 not less than two times the wire diameter expressed in mm.The requirements for zinc-aluminium coatings of type Zn 95Al 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 coatingThe coating applied to the wire shall be reasonably smooth and as evenly distributed as industrialtechnology allows and not show discontinuities such as bare patches, dross contamination etc.NOTEThe Zn 95Al5 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 testWhen specified the dipping (immersion) test shall be carried out according to the procedure detailedin 5.3. However it should be pointed out that there is no direct link between the number of dips andthe mass of the coating and that the result is determined as much by the conditions of manufacture ofthe 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 10244-2:2002

Page 7EN 10244-2:2001Table 2 — Mass requirements for a coating of Zn 95Al5Diameter (mm)mass of coating (g/m2)ABAB0,20

d < 0,2520200,25
d < 0,4030300,40
d < 0,508540550,50
d < 0,6010050700,60
d < 0,7011560800,70
d < 0,8013060900,80
d < 0,90145701000,90
d < 1,00155701101,00
d < 1,20165801151,20
d < 1,40180901251,40
d < 1,651951001351,65
d < 1,852051001451,85
d < 2,152151151552,15
d < 2,502301251702,50
d < 2,802451251852,80
d < 3,202551351953,20
d < 3,802651352103,80
d < 4,402751352204,40
d < 5,202801502205,20
d < 8,202908,20

d < 10,00300NOTEClass A : usually zinc alloy coated at final sizeClass B : usually coated and drawn after coatingClass AB : re-drawn or coated with zinc-aluminium alloy after final drawing.SIST EN 10244-2:2002

Page 8EN 10244-2:2001Table 3 — Minimum number of dipsNominal diameter (mm)Class A of coatingClass AB of coatingNumber of dipsNumber of dipsof 1 minof 1/2 minof 1minof 1/2 min0,40

d < 0,60-1--0,60
d < 0,901--10,90
d < 1,0011-11,00
d < 1,40111-1,40
d < 1,652-1-1,65
d < 1,852-1-1,85
d < 2,152-112,15
d < 2,8021112,80
d < 4,403-2-4,40
d < 5,20312-5,20
d < 8,2031--8,20

d < 10,004---4.2.4 Special finishesIf drawing after galvanising is required it shall be stipulated at the time of enquiry and order or in theappropriate product standard. The same also applies for other special finishes such as wax coating, apolished surface or an exceptionally smooth surface.4.2.5 Adherence of coating4.2.5.1 During the test carried out in accordance with EN 10218-1, the coating shall adhere to thesteel when subjected to the conditions of wrapping test for adherence. It shall not crack or split tosuch an extent that slivers of coating can be removed by simply rubbing with the bare fing

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