EN ISO 20728:2018

Corrosion of metal and alloys - Determination of resistance of magnesium alloys to stress corrosion cracking (ISO 20728:2018)

This document specifies a method for the determination of resistance to stress corrosion cracking (SCC) of magnesium alloys intended for use in structural applications (such as magnesium front end, gearbox and clutch housing units, steering column parts, shift actuators, valve covers and housings, brackets and intake manifold blades, electronic devices, power tools and medical equipment). The method allows determination of the resistance to SCC as a function of the chemical composition, the method of manufacture and heat treatment of magnesium alloys.
The document is applicable to cast and wrought magnesium alloys in the form of castings, semi-finished products, parts and weldments and covers the method of sampling, the types of specimens, the loading procedure, the type of environment and the interpretation of results.
The document allows assessment of the relative performance of materials and products in environments containing chlorides or sulphates, provided that the failure mechanism is not changed, but does not qualify a material or product for service application.

Korrosion von Metall und Legierungen - Bestimmung der Beständigkeit von Magnesiumlegierungen gegen Spannungsrisskorrosion (ISO 20728:2018)

Corrosion des métaux et alliages - Détermination de la résistance des alliages de magnésium à la fissuration par corrosion sous contrainte (ISO 20728:2018)

Le présent document spécifie une méthode pour la détermination de la résistance à la corrosion sous contrainte (CSC) d'alliages de magnésium destinés à être utilisés dans des applications structurales (tels les trains avant de véhicule en magnésium, les carters de boîte de vitesses et d'embrayage, les pièces de colonne de direction, les actionneurs de boîte de vitesses, les couvercles et logements de soupapes, les brides et lames de collecteur d'admission, les dispositifs électroniques, les outils électriques et les appareils médicaux). Cette méthode permet de déterminer la résistance à la corrosion sous contrainte en fonction de la composition chimique, du procédé de fabrication et du traitement thermique des alliages de magnésium.
Le présent document s'applique aux alliages de magnésium coulés et corroyés se présentant sous forme de produits moulés, produits semi-finis, pièces et assemblages soudés; il couvre la méthode d'échantillonnage, les types d'éprouvettes, le mode opératoire de mise en charge, le type de milieu et l'interprétation des résultats.
Le présent document permet d'évaluer la performance relative de matériaux et de produits dans des milieux contenant des chlorures ou des sulfates, à condition que le mécanisme de rupture ne soit pas modifié, mais il ne qualifie pas un matériau ou un produit pour son application en service.

Korozija kovin in zlitin - Ugotavljanje odpornosti magnezijevih zlitin proti pokanju zaradi napetostne korozije (ISO 20728:2018)

Ta mednarodni standard določa metodo za ugotavljanje odpornosti magnezijevih zlitin proti pokanju zaradi napetostne korozije (SCC). Ta mednarodni standard zajema metodo vzorčenja, vrste vzorcev, postopek nalaganja, vrsto okolja in razlago rezultatov. Ta mednarodni standard je namenjen ugotavljanju odpornosti proti pokanju zaradi napetostne korozije kot funkcije kemijske sestave, načina proizvodnje in toplotne obdelave magnezijevih zlitin. Ta mednarodni standard se uporablja za ulite in gnetene magnezijeve zlitine v obliki ulitkov, polizdelkov, delov in zvarov. Večina naravnih okolij in številna umetna okolja vsebujejo kloride, zato se lahko ta mednarodni standard uporablja za primerjavo zmogljivosti izdelkov, ki se uporabljajo v okoljih z vsebnostjo kloridov, pri čemer mora mehanizem okvare ostati enak. Vendar se rezultati tega preskusa naj ne bi upoštevali kot absolutno merilo za kakovost zlitin.

General Information

• Status: Published
• Publication Date: 09-Oct-2018
• Withdrawal Date: 29-Apr-2019
• ICS: 77.060 - Corrosion of metals
• Technical Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Drafting Committee: CEN/TC 262/WG 12 - Maintenance and ISO co-ordination
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 10-Oct-2018
• Completion Date: 10-Oct-2018
• Ref Project: SIST EN ISO 20728:2018 - Corrosion of metal and alloys - Determination of resistance of magnesium alloys to stress corrosion cracking (ISO 20728:2018)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 20728:2018
01-december-2018
Korozija kovin in zlitin - Ugotavljanje odpornosti magnezijevih zlitin proti pokanju
zaradi napetostne korozije (ISO 20728:2018)
Corrosion of metal and alloys - Determination of resistance of magnesium alloys to
stress corrosion cracking (ISO 20728:2018)
Korrosion von Metall und Legierungen - Bestimmung der Beständigkeit von
Magnesiumlegierungen gegen Spannungsrisskorrosion (ISO 20728:2018)
Corrosion des métaux et alliages - Détermination de la résistance des alliages de
magnésium à la fissuration par corrosion sous contrainte (ISO 20728:2018)
Ta slovenski standard je istoveten z: EN ISO 20728:2018
ICS:
77.060 Korozija kovin Corrosion of metals
77.120.20 Magnezij in magnezijeve Magnesium and magnesium
zlitine alloys
SIST EN ISO 20728:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 20728:2018

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SIST EN ISO 20728:2018


EN ISO 20728
EUROPEAN STANDARD

NORME EUROPÉENNE

October 2018
EUROPÄISCHE NORM
ICS 77.060
English Version

Corrosion of metal and alloys - Determination of resistance
of magnesium alloys to stress corrosion cracking (ISO
20728:2018)
Corrosion des métaux et alliages - Détermination de la Korrosion von Metall und Legierungen - Bestimmung
résistance des alliages de magnésium à la fissuration der Beständigkeit von Magnesiumlegierungen gegen
par corrosion sous contrainte (ISO 20728:2018) Spannungsrisskorrosion (ISO 20728:2018)
This European Standard was approved by CEN on 6 September 2018.

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20728:2018 E
worldwide for CEN national Members.

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SIST EN ISO 20728:2018
EN ISO 20728:2018 (E)
Contents Page
European foreword . 3

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SIST EN ISO 20728:2018
EN ISO 20728:2018 (E)
European foreword
This document (EN ISO 20728:2018) has been prepared by Technical Committee ISO/TC 156
"Corrosion of metals and alloys" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
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 April 2019, and conflicting national standards shall be
withdrawn at the latest by April 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
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,
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.
Endorsement notice
The text of ISO 20728:2018 has been approved by CEN as EN ISO 20728:2018 without any modification.

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