BS-EN-12438-1998.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12438:1998 The Euro
2、pean Standard EN 12438:1998 has the status of a British Standard ICS 77.120.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Magnesium and magnesium alloys Magnesium alloys for cast anodes Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:51:16 GMT+00:00 2006, Uncont
3、rolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1998 BSI 1998 ISBN 0 580 29993 7 BS EN 12438:1998 Amendments issued since publication Am
4、d. No.DateText affected National foreword This British Standard is the English language version of EN 12438:1998. The UK participation in its preparation was entrusted by Technical Committee NFE/35, Light metals and their alloys, to Subcommittee NFE/35/4, Magnesium and magnesium alloys, which has th
5、e responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of
6、organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International
7、Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Stan
8、dard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:51:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
9、CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12438:199
10、8 E EUROPEAN STANDARDEN 12438 NORME EUROPE ENNE EUROPA ISCHE NORM April 1998 ICS 77.120.20; 77.150.10 Descriptors: Magnesium, magnesium alloys, anodes, castings, ingots, designation, quality, chemical composition, specifications, tests, electrochemical methods English version Magnesium and magnesium
11、 alloys Magnesium alloys for cast anodes Magne sium et alliages de magne sium Alliages de magne sium pour anodes coule es Magnesium und Magnesiumlegierungen Magnesiumlegierungen fu r Guanoden This European Standard was approved by CEN on 25 March 1998. CEN members are bound to comply with the CEN/CE
12、NELEC 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 Central Secretariat or to any
13、 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 Central Secretariat has the same status as the official versions. CE
14、N 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:51:
15、16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12438:1998 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 190, Foundry technology, the secretariat of which is held by DIN. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC
16、190/WG 3.10, Cast magnesium, to prepare the following standard: EN 12438, Magnesium and magnesium alloys Magnesium alloys for cast anodes. 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 1
17、998, and conflicting national standards shall be withdrawn at the latest by October 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European standard: Austria, Belgium, Czech Republic, Denmark, Finla
18、nd, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Designations3 3.1Material3 3.2Casting process3 4Requirements3 4.1General3 4.2Chemi
19、cal composition3 5Testing3 5.1Analysis of chemical composition3 5.2Electrochemical testing3 6Rounding of numbers3 Annex A (normative) Test method for the determination of the electrode potential of galvanic anodes6 Annex B (normative) Test method for the determination of the rate of mass loss of gal
20、vanic anodes7 Annex C (informative) List of corresponding international designations and former national designations9 Annex D (informative) Bibliography9 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:51:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12438:1998 BSI 1998 Introduc
21、tion This European Standard classifies the commercially available magnesium anode alloys into a number of grades suitable for the applications to which they might be put. The annexes A and B describe methods for electrochemical tests with corresponding recommended values. Annex C gives a list of cor
22、responding international designations and former national designations. 1 Scope This European Standard specifies the chemical composition of magnesium alloy ingots for anodes and chemical composition of magnesium alloy anode castings. 2 Normative references This European Standard incorporates, by da
23、ted or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard
24、 only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 1559-1, Founding Technical conditions of delivery Part 1: General. EN 1559-5, Founding Technical conditions of delivery Part 5: Additional requirements for ma
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