1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 31 August 2004 prEN 2434-05 Edition P 1 August 2004 Comments should be sent within six months after the date of publication to Non-metallic Material Domain AECMA-STAN ICs: Descriptors: ENGLISH VERSION Aerospace series Paints and
2、varnishes Two component cold curing polyurethane finish Part 05: High flexibility and chemical agent resistance for military application Srie arospatiale Peintures et vernis Peinture de finition polyurthane, deux composants polymrisant temprature ambiante Partie 05: Haute flexibilit et rsistance aux
3、 substances chimiques pour applications militaires Luft- und Raumfahrt Anstrichstoffe Zwei komponenten Polyurethan-Decklack kalthrtend Teil 05: Hohe Elastizitt und Bestndigkeit gegen Chemikalien fr militrische Anwendung This “Aerospace Series“ frestandard has been drawn up under the responsibility o
4、f AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this frestandard, t
5、he technical content shall not be changed to an extent that interchangeabilify is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN
6、 (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN.
7、I I Copytight 2004 O by AECMA-STA1 Page 2 prEN 2434-05:2004 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANS Non-metallic Material Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA- STANS General Process Ma
8、nual, this standard has received approval for Publication. Contents Page 1 Scope 3 2 Normative references . 3 Definitions 5 4 Classification . 5 5 Batch release and qualification testing . 5 5.1 Qualification tests 5 5.2 Batch acceptance testing . 6 6 Designation 16 7 Requirements for fibre reinforc
9、ed composites 16 Page 3 prEN 2434-05:2004 1 Scope This standard specifies the requirements for a two component flexible polyurethane topcoat to be applied over EN 2435-05 or EN 2436-06 primer mainly for exterior aerospace applications. The primer and the finish tested to this specification will be f
10、rom the same manufacturer applied in accordance with (i.a.w.) their instructionirable 1. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the pu
11、blications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including
12、 amendments). IS0 151 3, IS0 151 7, IS0 151 8, IS0 151 9, IS0 1520, IS0 1524, IS0 2409, IS0 2431, IS0 281 1-1, IS0 281 1-2, IS0 281 1-3, IS0 281 1-4, IS0 2812-1, IS0 281 2-2, IS0 281 3, IS0 3251, Paints and varnishes - Examination and preparation of samples for testing Paints and varnishes - Surface
13、drying test - Ballotini method Paints and varnishes - Scratch test Paints and varnishes - Bend test (cylindrical mandrel) Paints and varnishes - Cupping test Paints, varnishes and printing inks - Determination of fineness of grind Paints and varnishes - Cross-cut test Paints and varnishes - Determi
14、nation of flow time by use of flow cups Paints and varnishes - Determination of density - Patt I: Pyknometer method Paints and varnishes - Determination of density - Patt 2: Immersed body (plummet) method Paints and varnishes - Determination of density - Patt 3: Oscillation method Paints and varnish
15、es - Determination of density - Patt 4: Pressure cup method Paints and varnishes - Determination of resistance to liquids - Patt I: General methods Paints and varnishes - Determination of resistance to liquids - Patt 2: Water immersion method Paints and varnishes - Determination of specular gloss of
16、 non-metallic paint films at 20, 60“ and 85“ Paints, varnishes and plastics - Determination of non-volatile-matter content Page 4 prEN 2434-05:2004 IS0 3270, IS0 3675, IS0 3678, IS0 3679, IS0 3680, IS0 4623-2, IS0 4628-2, IS0 4628-8, Paints and varnishes and their raw materials - Temperatures and hu
17、midities for conditioning and testing Crude petroleum and liquid petroleum products - Laboratory determination of density - Hydrometer method Paints and varnishes - Print-free fest Determination of flash point - Rapid equilibrium closed cup method Determination of flashho flash - Rapid equilibrium c
18、losed cup method Paints and varnishes - Determination of resistance to filiform corrosion - Patt 2: Aluminium substrates Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Patt 2: Assessment
19、of degree of blistering Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensify of uniform changes in appearance - Patt 8: Evaluation of corrosion around the scribe IS0 4628-1 O, Paints and varnishes - Evaluation of degradation of
20、coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Patt IO: Assessment of IS0 6270-1, IS0 7253, IS0 7724-1, IS0 7724-2, IS0 7724-3, IS0 91 17, IS0 9514, IS0 11341, degree of filiform corrosion Paints and varnishes - Determination of resistance
21、 to humidity - Patt I: Continuous condensation Paints and varnishes - Determination of resistance to neutral salt spray (fog) Paints and varnishes - Colorimetry - Patt I: Principles Paints and varnishes - Colorimetry - Patt 2: Colour measurement Paints and varnishes - Colorimetry - Patt 3: Calculati
22、on of colour differences Paints and varnishes - Determination of through-dry state and through-dry time - Method of test Paints and varnishes - Determination of the pot-life of liquid systems - Preparation and conditioning of samples and guidelines for testing Paints and varnishes - Artificial weath
23、ering and exposure to attificial radiation - Exposure to filtered xenon-arc radiation IS0 11890-1, Paints and varnishes - Determination of volatile organic compound (VOC) content - Patt I: Difference method IS0 11890-2, Paints and varnishes - Determination of volatile organic compound (VOC) content
24、 Patt 2: Gas-chromatographic method IS0 1 1909, Binders for paints and varnishes - Polyisocyanate resins - General methods of test IS0 15710, Paints and varnishes - Corrosion testing by alternate immersion in and removal from a buffered sodium chloride solution Page 5 prEN 2434-05:2004 EN 2435-05,
25、EN 2436-06, EN 3837, EN 3840, EN 3847, EN 4160, EN 6042, Aerospace series - Paints and varnishes - Corrosion resistant chromated two component cold curing epoxy primer - Part 05: High corrosion resistance for military application ) Aerospace series - Paints and varnishes - Corrosion resistant chroma
26、te-free two component cold curing epoxy primer - Part 06: High corrosion resistance for military application ) Aerospace series - Paints and varnishes - Nature and method for surface preparation of test pieces in aluminium alloys 1) Aerospace series - Paints and varnishes - Technical specification )
27、 Aerospace series - Paints and varnishes - Determination of sedimentation rating ) Aerospace series - Non-metallic materials - Paints and varnishes - Test methods - Determination of the effects of thermal exposure Aerospace series - Organic compounds - Test method - Analysis by infrared spectroscopy
28、 STANAG 4477, Specification for paints and paint systems resistant to chemical agents an decontaminations for protection of aerospace military equipment 2, 3 Definitions For the purposes of this standard, the definitions given in EN 3840 apply. 4 Classification The topcoat is classified according to
29、 the following types and classes: Type I: Standard solvent content; Type II: Low volatile organic content ( 90 units at 60“ and 80 units at 20“. 5 Batch release and qualification testing 5.1 Qualification tests For product qualification, all tests defined in this standard, in the Tables 1 to 7, shal
30、l be performed. A minimum of three batches shall be tested for qualification purposes. 1) Published as AECMA Prestandard at the date of publication of this standard 2) Published by: NATO Military Agency for Standardization (MAS); B-I 110 Brussels Page 6 prEN 2434-05:2004 5.2 Batch acceptance testing
31、 For batch acceptance the tests marked with the symbol * shall be performed. Table 1 - General requirements Material description Formulation Preparation Technical specification Marking Storage stability Application and use Drying conditions Freedom from defects Quality assurance Packaging Health and
32、 safety Two component cold curing polyurethane topcoat Base: hydroxyl functional polyester or acrylic resins Activator: a polyisocyanate activator solution Thinner: if required These components shall be mixed in simple whole number proportions, by volume or weight, in accordance with the manufacture
33、rs instructions. EN 3840 See EN 3840. See EN 3840. Dry film thickness of (50k5) pm (with primer EN 2435-05 or EN 2436-06 (25 k 5) pm will be 65 pm to 85 pm) IS0 3270 for 168 h before testing. Finish is applied to the primer (EN 2435-05 or EN 2436-06) following drying up the primer for 4 hours to 6 h
34、ours as specified See EN 3840. See EN 3840. See EN 3840. See EN 3840. Page 7 prEN 2434-05:2004 g/l Table 2 - Physical and chemical characteristics - Delivery conditions 90 units at 60“ and 80 units at 20“ 31 coating 25 EN 2435-05 or EN 2436-06 and coating to this standard Test Specular gloss IR refl
35、ection factor Bend test cylindrical mandrel a Primer not exposed Test criteria Test requirements test method I IS0 2813 panel I EN 3837 -A2 pretreatment I EN 3837 - Process A or B or C I IS03270 test condition test method I EN 3840, annex E panel EN 3837 - A2 2024-T3 clad standard I IS03270 test con
36、dition requirement I to be agreed between purchaser and supplier test method I IS0 1519 panel I EN 3837 -A6 pretreatment I EN 3837 - Process B (- 55 k 2) “C test condition requirement I mandrel - 6 mm a No cracking or detachment (x10 magnification) Page 12 prEN 2434-05:2004 requirements EN 3840 test
37、 24 classification 1 I I EN 3840 test 29 2 1 500 g a Table 4 - Environmental exposure/testing - Dried film Test Test criteria Test req ui remen ts according to EN 3840 38 Thermal exposure (resistance to high temperature) I test method I EN 4160 I panel I EN 3837 - A2 EN 3837 - Process B and C EN 243
38、5-05 or EN 2436-06 and coating to this standard (150 k 2) OC, 24 h EN 3840 test 24 classification 1 EN 3840 test 29 2 1 500 g a EN 3840 test 46 2 5 mm IS0 6270-1 EN 3837 - A2 pretreatment coating test condition requirements 37 Resistance to humidity test method panel pretreatment EN 3837 - Process B
39、 and C coating EN 2435-05 or EN 2436-06 and coating to this standard I (40 k 2) OC, (95 to 100) % RH, 500 h I :idition requirements EN 3840 test 24 classification 1 EN 3840 test 29 2 1 500 g a IS0 4628-2, degree of blistering O 34 Water behaviour I test method I IS0 2812-2 EN 3837 - A:, EN 3837 - Pr
40、ocess B and C pretreatment coating EN 2435-05 or EN 2436-06 and coating to this standard I :idition I (40 k 2) OC, 168 h + test method IS0 4628-2, degree of blistering O IS0 11341, cycle A 40 Artificial weathering I panel I EN 3837 - A2 EN 3837 - Process A or B or C pretreatment coating EN 2435-05 o
41、r EN 2436-06 and coating to this standard I light 4 h, humidity 4 h, for 1 O00 h I :idition Test 27 20 % reduction from initial value Test 30 AE 2 units requirements a Substrate not exposed No cracking or detachment (x10 magnification) The time lag between exposure and testing shall not exceed 0,5 h
42、 Page 13 prEN 2434-05:2004 pretreatment coating test condition Table 5 - Corrosion tests - Dried film EN 3837 - Process A or B or C as specified EN 2435-05 or EN 2436-06 and coating to this standard (35 k 2) OC, 3 O00 h Procedure B a (35 k 2) OC, 1 O00 h Procedure A and C a Tests accordi ng to EN 38
43、40 requirements 42 EN 3840 test 24 classification 1 EN 3840 test 29 2 1 500 g IS0 4628-8, no corrosion more than 1,5 mm from the scratch IS0 4628-2, degree of blistering O 41 coating 43 EN 2435-05 or EN 2436-06 and coating to this standard Test requirements Resistance to neutral salt spray EN 3840 t
44、est 24 classification 1 EN 3840 test 29 2 1 500 g IS0 4628-8, no corrosion more than 1,5 mm form the scratch IS0 4628-2, degree of blistering O Resistance to alternate immersion pretreatment coating Filiform corrosion resistance EN 3837 - Process B and C EN 2435-05 or EN 2436-06 and coating to this
45、standard Test criteria I requirements Test requirements IS0 4628-10, no corrosion more than 2,O mm from the scratch cd IS0 4628-2, degree of blistering O test method I IS0 7253 panel I EN 3837 -Al test method I IS0 1571 O panel I EN 3837 -Al pretreatment I EN 3837 - Process B and C I (35 k 2) OC, 1
46、500 h a test condition test method I IS0 4623-2 panel I EN 3837 -Al (40 k 2) OC, (82 k 3) % RH, 1 O00 h test condition a The time lag between exposure and testing shall not exceed 0,5 h Substrate not exposed Most frequently occuring length For evaluation of the test result the coating shall be strip
47、ped Page 14 prEN 2434-05:2004 Table 6 - Exposure to system fluids and corrosion generating environmentesting - Dried film Test Test criteria Test req ui remen ts according to EN 3840 35 test method IS0 2812-1 Resistance to fluids - panel EN 3837 - A2 hydraulic oil NATO H-515 pretreatment EN 3837 - P
48、rocess B or C coating EN 2435-05 or EN 2436-06 and coating to this standard test condition (70 k 2) OC, 300 h a requirement EN 3840 test 29 2 1 500 g IS0 4628-2, degree of blistering O 35 IS0 2812-1 EN 3837 - A2 Resistance to jet fuel DERD 2453 fluids - (F-34) test method panel EN 3837 - Process B o
49、r C pretreatment coating EN 2435-05 or EN 2436-06 and coating to this standard (40 k 2) OC, 1 O00 h a test condition requirement EN 3840 test 24 classification 1 EN 3840 test 29 2 1 500 g EN 3840 test 46 2 5 mm IS0 4628-2, degree of blistering O test methods STANAG 4477 Resistance to chemical agents EN 3837 - A2 EN 3837 - Process B or C panel pretreatment coating primer according to EN 2435-05 or EN 2436-06 and coating according to this standard STANAG 4477, method 8c test condition STANAG 4477 STANAG 4477 requirements test methods Resistance to decontaminants EN 3837 - A
