EN 12496:2013

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Galvanische Anoden für den kathodischen Schutz in Seewasser und salzhaltigem SchlammAnodes galvaniques pour la protection cathodique dans l'eau de mer et les boues salinesGalvanic anodes for cathodic protection in seawater and saline mud77.060Korozija kovinCorrosion of metalsICS:Ta slovenski standard je istoveten z:EN 12496:2013SIST EN 12496:2013en,de01-september-2013SIST EN 12496:2013SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12496
June 2013 ICS 77.060 English Version
Galvanic anodes for cathodic protection in seawater and saline mud
Anodes galvaniques pour la protection cathodique dans l'eau de mer et les boues salines
Galvanische Anoden für den kathodischen Schutz in Seewasser und salzhaltigem Schlamm This European Standard was approved by CEN on 25 April 2013.
CEN members are bound to comply 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-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12496:2013: ESIST EN 12496:2013

bk k2n9p:2Mkm bbc 2 Contents Page coreword .m fntroduction .n k pcope .o 2 kormative references .o m Terms and definitions .o n dalvanic anode materials and their properties .8 n.k deneral .8 n.2 Anode alloy composition .8 n.m
blectrochemical properties .9 n.m.k deneral .9 n.m.2 motential .9 n.m.m Current capacity.9 n.m.n Anode consumption rate . kM o Anode design and acceptance criteria . kM o.k deneral . kM o.2 Chemical composition . kk o.m mhysical properties . kk o.n blectrochemical testing . kk o.o Anode core materials . k2 o.p Cable connections . km Annex A bnormativec
mhysical tolerances for galvanic anodes . kn A.k Anode mass . kn A.2 Anode dimensions and straightness . kn A.m pteel core . ko A.n Anode surface irregularities . ko A.o Cracks in cast anodic material . ko A.o.k deneral . ko A.o.2 ptand-off and flush mounting anodes . kp A.o.m Bracelet anodes . kp A.p fnternal defects and destructive testing . kp Annex B binformativec
Composition and performance properties for galvanic anodes . k8 B.k Aluminium alloys . k8 B.k.k Anode material . k8 B.k.2 blectrochemical properties . k9 B.2 Magnesium alloy . 2M B.2.k Anode material . 2M B.2.2 blectrochemical properties . 2k B.m winc alloy . 22 B.m.k Anode material . 22 B.m.2 blectrochemical properties . 2m Annex C binformativec
aescription of various electrochemical tests . 2n C.k cree running test. 2n C.2 dalvanostatic test . 2n C.m motentiostatic test . 2n C.n nuality control testing . 2o Bibliography . 2p
bk k2n9p:2Mkm bbc m coreword This document (EN 12496:2013) has been prepared by Technical Committee CEN/TC 219 “Cathodic protection”, 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 endorsement, at the latest by December 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. 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. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12496:2013

bk k2n9p:2Mkm bbc n fntroduction The anticipated performance, including design life, of the cast galvanic anodes for use in sea water and saline mud is determined by their composition and the quality of their manufacture.
This European Standard specifies the minimum requirements for the galvanic anodes quality levels and verification procedures.
bk k2n9p:2Mkm bbc o k pcope This European Standard specifies the minimum requirements and gives recommendations for the chemical composition, the electrochemical properties, the physical tolerances, and the test and inspection procedures for cast galvanic anodes of aluminium, magnesium and zinc based alloys for cathodic protection in sea water and saline mud. This European Standard is applicable to the majority of galvanic anodes used for seawater and saline mud applications, i.e. cast anodes of trapezoidal, "D", or circular cross section and bracelet type anodes. The general requirements and recommendations of this European Standard may also be applied to other anode shapes, e.g. half-spherical, button, etc., which are sometimes used for seawater applications. 2 kormative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 287-1, Qualification test of welders  Fusion welding  Part 1: Steels EN 12473, General principles of cathodic protection in sea water EN ISO 8044,
EN ISO 8501-1, Preparation of steel substrates before application of paints and related products  Visual assessment of surface cleanliness  Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings (ISO 8501-1) EN ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules (ISO 15607) EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 1: Arc welding (ISO 15609-1) ISO 10474:1991, Steel and steel products  Inspection documents m Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 8044 and EN 12473 and the following apply. m.k acidity presence of an excess of hydrogen ions over hydroxyl ions (pH <7) m.2 active surface surface condition where corrosion occurs m.m anode consumption rate
mass consumption rate amount of anode material consumed for a current output of one ampere during one year Note 1 to entry: The anode consumption rate is expressed in kilograms per amp year (kg/A.y). SIST EN 12496:2013

bk k2n9p:2Mkm bbc p m.n batch charge cast
unit that defines molten metal and identifies the anodes cast from it m.o bracelet anode anode shaped as half- or part-rings to be positioned on tubular items Note 1 to entry: Two or more part-ring anodes will have to fit together to become a bracelet anode. m.p calcareous deposit layer consisting of a mixture of calcium carbonate and magnesium hydroxide deposited on surfaces being cathodically protected in seawater due to the increased pH adjacent to the protected surface m.T cast see "batch" m.8 charge see "batch" m.9 closed circuit potential potential measured at the anode when a current is flowing in between the anode and the surface being protected m.kM cold shut horizontal surface discontinuity caused by solidification of a portion of a meniscus during the progressive filling of a mould, which is later covered with more solidifying metals as the molten metal level rises Note 1 to entry: Cold shuts generally occur at corners remote from the point of pour. m.kk core see "insert" m.k2 crack fracture of metal along a path producing a discontinuity similar to a ragged edge Note 1 to entry: It can occur during the solidification of the anode (hot cracking), during the contraction of the anode after solidification, or under externally applied loads. Hot cracking can be associated with the shrinkage depression that can occur in open-topped moulds. m.km current capacity total amount of electricity that is produced when one kilogram of anode material is consumed Note 1 to entry: The current capacity is expressed in amp-hours per kilogram (A.h/kg). m.kn driving voltage voltage established between the operating potential of a galvanic anode and the protection pot
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