SIST EN 12438:2017

Magnesium and magnesium alloys - Magnesium alloys for cast anodes

This European Standard specifies the grades and the corresponding requirements for magnesium alloys for cast anodes.
This European Standard specifies 2 groups of cast magnesium alloy grades by a classification based on chemical composition. The first group deals with magnesium alloy ingots for anodes. The second group deals with magnesium alloy anode castings.
This European Standard specifies chemical composition, designation, testing and inspection documentation.
This European Standard does not cover technical delivery conditions for magnesium alloy anode castings (see EN 1559-1 [3] and EN 1559-5 [4]).

Magnesium und Magnesiumlegierungen - Magnesiumlegierungen für Gussanoden

Diese Europäische Norm legt die Sorten und die zugehörigen Anforderungen der Magnesium-legierungen für Gussanoden fest.
Diese Europäische Norm legt 2 Gruppen von Magnesiumguss-Legierungssorten, nach der Einordnung anhand der chemischen Zusammensetzung, fest. Die erste Gruppe behandelt Blockmetalle aus Magnesium¬legierungen für Anoden. Die zweite Gruppe behandelt Gussanoden aus Magnesiumlegierungen.
Diese Europäische Norm legt die chemische Zusammensetzung, Bezeichnung, Prüfung und Prüfbe-scheinigung fest.
Diese Europäische Norm legt nicht die Technischen Lieferbedingungen für Gussanoden aus Magnesium¬legierungen fest (siehe EN 1559 1 [3] und EN 1559 5 [4]).

Magnésium et alliages de magnésium - Alliages de magnésium pour anodes coulées

La présente Norme européenne spécifie les nuances et les exigences correspondantes des alliages de magnésium pour anodes coulées.
La présente Norme européenne spécifie 2 groupes de nuances d’alliages de magnésium moulé en utilisant une classification basée sur la composition chimique. Le premier groupe concerne les lingots en alliage de magnésium pour anodes. Le second groupe concerne les anodes coulées en alliage de magnésium.
La présente Norme européenne spécifie la composition chimique, la désignation, les essais et la documentation de contrôle.
La présente Norme européenne ne couvre pas les conditions techniques de fourniture des anodes coulées en alliage de magnésium (voir l'EN 1559-1 [3] et l'EN 1559-5 [4]).

Magnezij in magnezijeve zlitine - Magnezijeve zlitine za lite anode

Ta evropski standard določa razrede in ustrezne zahteve za magnezijeve zlitine za lite anode.
Ta evropski standard določa 2 skupini razredov litih magnezijevih zlitin z razvrstitvijo, ki temelji na kemijski sestavi. Prva skupina opisuje ingote magnezijevih zlitin za anode. Druga skupina opisuje ulitke anod iz magnezijevih zlitin.
Ta evropski standard določa kemijsko sestavo, poimenovanje, preskušanje in pregled dokumentacije.
Ta evropski standard ne zajema tehničnih dobavnih pogojev za ulitke anod iz magnezijevih zlitin (glej standarda EN 1559-1 [3] in EN 1559-5 [4]).

General Information

• Status: Published
• Public Enquiry End Date: 29-Sep-2015
• Publication Date: 21-Sep-2017
• ICS: 77.120.20 - Magnesium and magnesium alloys
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 14-Sep-2017
• Due Date: 19-Nov-2017
• Completion Date: 22-Sep-2017
• Directive: TP262 - Uredba o pitni vodi
• Ref Project: EN 12438:2017 - Magnesium and magnesium alloys - Magnesium alloys for cast anodes

Relations

• Replaces: SIST EN 12438:2000 - Magnesium and magnesium alloys - Magnesium alloys for cast anodes
• Effective Date: 13-Sep-2017
• Revised: SIST EN 12438:2000 - Magnesium and magnesium alloys - Magnesium alloys for cast anodes
• Effective Date: 01-Sep-2015

Overview

EN 12438:2017 (CEN) specifies grades and requirements for magnesium alloys for cast anodes. The standard classifies alloys into two groups - magnesium alloy ingots for anodes and magnesium alloy anode castings - and sets out chemical composition, designation, testing and inspection documentation required for these materials. It is intended to support manufacturers, purchasers and testing laboratories involved in producing and verifying cast magnesium anodes used for galvanic cathodic protection.

Key topics and technical requirements

• Scope and classification
  • Two alloy groups: ingots for anode casting and finished cast anodes.
  • Material designation by symbol or number (aligned with EN 1754 and EN 10027‑2).
• Chemical composition
  • Compositional limits are defined for specified alloy grades (e.g., Mg–Al–Zn and Mg–Mn families).
  • Composition is normally assessed from samples taken from the melt at pouring, unless agreed otherwise.
• Designation and casting process indicators
  • Casting process symbols: S = sand casting, K = permanent mould (gravity), C = continuous casting.
• Sampling and testing
  • Sampling frequency follows manufacturer QA procedures or purchaser agreement; traceability required.
  • Chemical analysis must use standardized or validated methods; rounding follows EN ISO 80000‑1 rules.
  • Electrochemical tests are included (Annex A and B): electrode potential determination and rate of mass‑loss testing (galvanostatic polarization, defined test solutions and temperatures, hydrogen evolution measurement).
• Documentation and delivery
  • Inspection documentation per EN 10204 when requested.
  • The standard does not define technical delivery conditions for castings - see EN 1559‑1 and EN 1559‑5.
• Other practical requirements
  • Surface cleanliness and freedom from agreed levels of visible/internal imperfections.
  • Packaging/surface protection as agreed for transport/storage.

Applications and who uses this standard

EN 12438 is used by:

• Foundries and anode manufacturers producing magnesium alloy cast anodes for cathodic protection.
• Corrosion engineers and cathodic protection specialists specifying anode materials for marine, pipeline, or buried structures.
• Quality assurance and testing laboratories performing chemical and electrochemical verification (electrode potential, mass‑loss).
• Procurement and compliance teams requiring harmonized material designations, inspection documentation and traceability. Practical applications include specifying alloy grades suitable for sacrificial anodes, ensuring performance in low‑conductivity electrolytes and verifying anode consumption rates for system design.

Related standards

• EN 1754 (material designation system)
• EN 10027‑2 (numbering rules)
• EN 1559‑1, EN 1559‑5 (technical delivery conditions for cast anode castings)
• EN 10204 (inspection documents)
• EN ISO 80000‑1 (units and rounding rules)

Keywords: EN 12438, magnesium alloys for cast anodes, cast anodes, magnesium alloy ingots, chemical composition, electrode potential test, mass loss testing, CEN standard, testing and inspection documentation.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Magnezij in magnezijeve zlitine - Magnezijeve zlitine za lite anodeMagnesium und Magnesiumlegierungen - Magnesiumlegierungen für GussanodenMagnésium et alliages de magnésium - Alliages de magnésium pour anodes couléesMagnesium and magnesium alloys - Magnesium alloys for cast anodes77.120.20Magnezij in magnezijeve zlitineMagnesium and magnesium alloysICS:Ta slovenski standard je istoveten z:EN 12438:2017SIST EN 12438:2017en01-november-2017SIST EN 12438:2017SLOVENSKI
STANDARDSIST EN 12438:20001DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12438
September
t r s y ICS
y yä s t rä t râ
y yä s w rä t r Supersedes EN
s t v u zã s { { zEnglish Version
Magnesium and magnesium alloys æ Magnesium alloys for cast anodes Magnésium et alliages de magnésium æ Alliages de magnésium pour anodes coulées
Magnesium und Magnesiumlegierungen æ Magnesiumlegierungen für Gussanoden This European Standard was approved by CEN on
t July
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t v u zã t r s y ESIST EN 12438:2017

Test method for the determination of the electrode potential of galvanic anodes . 10 Annex B (normative)
Test method for the determination of the rate of mass loss of galvanic anodes . 12 Annex C (informative)
Comparison of the designations of magnesium alloy ingots for cast anodes and magnesium alloy cast anodes according to this standard and its previous version . 16 Annex D (informative)
Significant technical changes between this European Standard and the previous edition . 17 Bibliography . 18 SIST EN 12438:2017

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Element Mg Al Zn Mn Si Fe Cu Ni Others (each)
Symbol Number
MgAlZn EN-MBMgAl3Zn1 3.5212 min. Rem. 2,6 0,7 0,20 – – – – – max. – 3,5 1,4 1,0 0,30 0,01 0,05 0,001 0,05 EN-MBMgAl6Zn1 3.5213 min. Rem. 5,6 0,7 0,20 – – – – – max. – 6,5 1,4 1,0 0,30 0,01 0,05 0,001 0,05 EN-MBMgAl6Zn3 3.5214 min. Rem. 5,1 2,1 0,20 – – – – – max. – 7,0 4,0 1,0 0,30 0,01 0,05 0,001 0,05 MgMn EN-MBMgMn1 3.5230 min. Rem. – – 0,50 – – – – – max. – 0,01 0,05 1,3 0,05 0,02 0,02 0,001 0,05 EN-MBMgMn2 3.5231 min. Rem. – – 1,20 – – – – – max. – 0,01 0,05 2,5 0,05 0,02 0,02 0,001 0,05 NOTE The material designation is in accordance with EN 1754 [1]. SIST EN 12438:2017
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