1、CEN ENx2004-5 93 3404589 0049402 393 = EUROPEAN STANDARD NORME EUROPENNE 0 EUROPISCHE NORM EN 2004-5 July 1993 UM: 669.715.018.26-4:620.1:537.311.3:629.7 Key words: Aircraft industry, aluminium products, aluminium alloys, semi-finished products, metal plating, clad metals, copper diffusion, tests, m
2、easurements, thickness English version Aerospace series - Test methods for aluminium and aluminium alloy products - Part 5: Determination of cladding thickness and copper diffusion of clad semi-finished products 0 Srie arospatiale Luft- und Raumfahrt Mthodes dessais applicables aux produits en alumi
3、nium et alliages daluminium Partie 5. Mesure de lpaisseur du placage et de la diffusion du cuivre dans le plaGage des demi-produits plaqus Prfverfahren fr Erzeugnisse aus Aluminiun und Aluminiumlegierungen %il 5. Bestimmung der Plattierdicke und der Kupferdiffusion bei plattiertem Halbzeug This Euro
4、pean Standard was approved by CEN on 1993-07-23. CEN members are bound to comply with the CEN 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 suc
5、h national standards may be obtained on application to the Central Secretariat 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
6、and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Unite
7、d Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O CEN 1993 Copyright reserved to CEN members e Ref. No. EN 2004-5 : 1993 CEN ENx2004-5 93 3404589 0049403 22T Page 2 EN 2004-5
8、: 1993 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National Associations and the O
9、fficial Services of the member countries of AECMA, prior to its presentation to CEN. This standard was submitted for Formal Vote, and the result was positive. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the
10、 latest by January 1994, and conflicting national standards shall be withdrawn at the latest by January 1994. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland,
11、 Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. CEN EN*2004-5 93 H 3404589 004940Y Lbb Page 3 EN 20045 : 1993 1 Scope This standard specifies a method for the measurement of cladding thickness and of copper diffusion into the cladding of semi-f
12、inished products. It is applicable when referenced. 2 Preparation of samples Sections shall be cut and prepared for examination. These sections shall be : - perpendicular to the rolled surface and in the direction of rolling, - polished and etched in the following reagent for a minimum of 20 cat a t
13、emperature between 15 OC and 30OC : - hydrochloridric acid (d = 1,19) : 1 ,5 ml, - nitric acid (d = 1,38 to 1,40) : 2,5 ml, - hydroluoric acid (d = 1,13) : 0,5 ml to 1 ,O ml, - distilled water : to give a volume of 1 O0 ml a 3 Procedure 3.1 Measurement of cladding thickness 3.1 .I On each side the c
14、ladding thickness shall be measured on at least five fields of view separated from each other by a distance of at least 2 mm. The mean cladding thickness on each side is the arithmetic mean of the values obtained. The sections shall be viewed at a suitable magnification (1 O0 to 500 times). 3.1.2 Th
15、e method used shall be agreed between the manufacturer and the purchaser. It shall be referenced to standard samples where cladding thickness has been determined in accordance with 3.1 .l. The standard samples used shall be of the same material, thickness and condition as the semi-finished product u
16、nder test. Other methods may be used, if specified, in the order or inspection schedule. e CEN EN*2004-5 93 = 3404589 0049405 OT2 9 Page 4 EN 2004-5 : 1993 3.2 Measurement of diffusion of copper into the cladding The sections shall be viewed at a suitable magnification (250 to 500 times). Any dark z
17、ones along the grain boundaries in the cladding show copper diffusion. Other methods may be used provided that the same results are guaranteed. The method defined in this standard shall be used in cases of dispute. 4 Test report The test report shall include the following : - reference to this standard, - mean cladding thickness for each side of the semi-finished product, - the maximum depth of copper diffusion for each sample. O a 0 a
