1、CEN PREN*2435-OL 94 3404589 0064148 T95 Edition approved for publication 1994-06-30 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to AECMA Technopolis - 1 75, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE prEN 2435
2、-01 Edition P 1 June 1994 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors : ENGLISH VERSION Aerospace series Paints and varnishes Corrosion resistant chr
3、omated two component cold curing primer Part O1 : Minimum requirements Srie arospatiale Luft- und Raumfahrt Peintures et vernis Anstrichstoffe Peinture primaire anti-corrosion chromate deux composants polymrisant temprature ambiante Partie O1 : Exigences minimales Korrosionsbestndiger Zweikomponente
4、n Grundanstrich, kalthrtend Chromathaltig Teil O1 : Mindestanforderungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. it has been
5、 technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-
6、identification of the standard. After examination and signature of the AECMA Standard Checking Centre INPSI and formal agreement of the Officiai Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota -
7、Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX C 7 Chairman Mr Bottrell aecrna 1994 CEN PREN*2435-01 94 m 3404587 0064149 921 = Page 3 prEN 2435-01 : 1994 1 Scope This standard specifies the minimum requirements for a two
8、-component, chromated epoxy or polyurethane, corrosion resistant primer which can be used with or without a finish for aerospace applications. The properties specified in this standard are obtained on defined aluminium alloy test pieces prepared in accordance with EN 3837 Procedure A and IS0 3270. T
9、he ability of the material to be used for a specific application (e.g. alternative substrate, specific drying conditions, etc.) shall be determined by supplementary tests to confirm that the requirements of this standard are met. 2 Normative references This European Standard incorporates by dated or
10、 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 only
11、when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 1518 IS0 2409 IS0 3270 Paints and varnishes - Scratch test Paints and varnishes - Cross-cut test Paints varnishes and their raw materials - Temperatures and humidit
12、ies for conditioning and testing Aerospace series - Fluids for assessment of non-metallic materials Aerospace series - Paints and varnishes - Nature and method for preparation of surface of test specimens in aluminium alloys 1) Aerospace series - Paints and varnishes - Technical specification EN 237
13、9 EN 3837 EN 3840 3 Definitions None applicable. 4 Classification The primers are classified according to the nature of the most typical chemical reaction that occurs between the two components : Type A : chromated epoxy - (reaction between an epoxy resin and an activator with amino functional Type
14、B : polyurethane - (reaction between an hydroxyl functional resin and a polyisocyanate activator). groups). 1) In preparation at the date of publication of this standard Previous page is blank CEN PRENr2435-01 94 = 3404589 0064350 643 Description block PRIMER Page 4 prEN 2435-01 : 1994 Identity bloc
15、k EN2435-01 A 5 Required characteristics Requirements concerning delivery, qualification, batch acceptance, sampling, test methods and other requirements specific to the material are defined in EN 3840. 5.1 Composition The primer consists of : - a base containing one or several corrosion inhibitors
16、associated, or not, with pigments and fillers dispersed in a mixture of resins and solvents ; - an activator solution ; and, if need be, a thinner. These components shall be mixed in simple whole number proportions, by volume or by weight, in accordance with the manufacturers instructions. 5.2 Requi
17、red characteristics 5.2.1 General The required characteristics are listed in the tables in annex A in accordance with the technical specification EN 3840. Unless otherwise specified, these characteristics are obtained for a primer paint applied with a dry film thickness of (20 f 5) ,um and dried at
18、(23 f 2) OC/(50 f 5) % HR for (1 70+ :) h before testing. 5.2.2 Qualification tests For qualification, all tests mentioned, in the tables in annex A, shall be carried out. 5.2.3 Acceptance tests For batch acceptance, only the tests marked (*), in the tables in annex A, need to be carried out. CEN PR
19、EN*2435-01 74 = 3404589 0064353 58T Units Base Activator Thinner Characteristics Test according to EN 3840 Units Requirements 8“ 9“ Flow time S * 10% Viscosity high shear rate Pa.s base + activator 2)l 3) IO* 20 * reference reference value 2) OC I value 2) value 2) 1) The deviation specified is as c
20、ompared to the reference value (see note 2) 2) The reference value is as established during qualification Table A.2 : Tests on liquid paint Sedimentation rating 5* I 30 base + activator + thinner I m1/4 h I reference value I g/l I base + activator + thinner 2) 49 I Volatile organic content (vc) I I
21、I 1) The deviation specified is as compared to the reference value (see note 2) 2) The reference value is as established during qualification 3) Test 8 shall be used for non-thixotropic paints and test 9 for thixotropic paints Table A.3 : Tests on wet film Test pieces according to EN 3837 Units Requ
22、irements Metal I Treatment Surface dry time e-+- Drying time - print free Procedure A2 I A 60 4 using a mass of 1000 g min h Procedure A2 I A 23 * I Through-dry time h 16 using a mass of 1500 g Procedure A2 1 A CEN PREN*2435-OL 94 W 3404589 00643.52 416 Test Temp OC according Characteristics 1% HR t
23、o EN 3840 /time (hl Requirements Page 6 prEN 2435-01 : 1994 Test pieces according to EN 3837 Metal Treatment Table A.4 : Tests on dry film 24 * Adhesion 231501- Classification I 1 Procedure A A2 2 1500 g metal not exposed I A2 I Procidure 29 * 1 Scratch resistance 1 231501- I Resistance to fluids 34
24、 35 * Water behaviour Resistance to fluids using tri-N-butyl phosphate (EN 2379 Group 2) 2 31-13 36 701-124 - Cross-hatch (IS0 2409) Classification I 1 - Scratch (IS0 1518) 2 1200 g metal not exposed - No blistering nor detachment (1 O x mag) - Scratch (IS0 151 8) L 1200 g metal not exposed - No blistering nor detachment (1 O x mag) A2 A2 Procedure A Procedure A Environment Corrosion tests 42 Resistance to neutral salt spray 351-11 O00 - No corrosion more than 2 rnm from the scratch - No blistering nor detachment
