1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4688:2012Aerospace series Paintsand varnishes Corrosioninhibiting two componentscold curing primer for militaryapplicationBS EN 4688:2012 BRITISH STANDARDNational forewordT
2、his British Standard is the UK implementation of EN 4688:2012. The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65/-/3, Paints, Surface Finish and ProtectiveTreatments for Aerospace Purposes.A list of organizations represented on this committee can beobtained on reques
3、t to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012 ISBN 978 0 580 76850 7 ICS 49.040 Compliance with a British Stan
4、dard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2012. Amendments issued since publicationDate Text affectedBS EN 4688:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4688 March
5、 2012 ICS 49.040 English Version Aerospace series - Paints and varnishes - Corrosion inhibiting two components cold curing primer for military application Srie arospatiale - Peinture et vernis - Peinture primaire anti corrosion chromate deux composants polymrisant temprature ambiante pour applicatio
6、ns militaires Luft- und Raumfahrt - Beschichungsstoffe - Zweikomponenten Grundbeschichtung, korrosionshemmend, raumtemperaturhrtend, fr militrische Anwendung This European Standard was approved by CEN on 21 January 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
7、 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 Euro
8、pean 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 ar
9、e the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Swede
10、n, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Me
11、mbers. Ref. No. EN 4688:2012: EBS EN 4688:2012EN 4688:2012 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .6 4 Surface pretreatment .7 5 Classification 7 6 Batch release and qualification testing .7 7 Designation . 18 BS EN 4688:2012EN 4688:2012 (E) 3 Forew
12、ord This document (EN 4688:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations
13、and the Official Services of the member countries of ASD, prior to its presentation to CEN. 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 September 2012, and conflicting national standards shall
14、 be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal R
15、egulations, 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
16、 Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4688:2012EN 4688:2012 (E) 4 1 Scope This European Standard defines the requirements for a two components, high corrosion inhibiting epoxy primer. The coating s
17、hould be suitable for use on suitably prepared metallic substrates, chromic acid anodized or conversion coated aluminium alloys, fibre reinforced composite materials and other suitably prepared substrates. 2 Normative references The following documents, in whole or in part, are normatively reference
18、d in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2101, Aerospace series Chromic acid anodizing of aluminium and wrought alum
19、inium alloys EN 2334, Aerospace series Chromic-sulphuric acid pickle of aluminium and aluminium alloys EN 2437, Aerospace series Chromate conversion coatings (yellow) for aluminium and aluminium alloys EN 3212, Aerospace series Paints and varnishes Corrosion test by alternate immersion in a buffered
20、 sodium chloride solution EN 3837, Aerospace series Paints and varnishes Nature and method for surface preparation of test pieces in aluminium alloys 1)EN 3840, Aerospace series Paints and varnishes Technical specification EN 3847, Aerospace series Paints and varnishes Determination of sedimentation
21、 rating 1)EN 4160, Aerospace series Non-metallic materials Paints and varnishes Test methods Determination of the effect of thermal exposure 1)EN 4687, Aerospace series Paints and varnishes Chromate free non corrosion inhibiting two components cold curing primer for military application EN 4689, Aer
22、ospace series Paints and varnishes Two components cold curing polyurethane finish High flexibility and chemical agent resistance for military application EN ISO 1513, Paints and varnishes Examination and preparation of test samples EN ISO 1518, Paints and varnishes Scratch test EN ISO 1519, Paints a
23、nd varnishes Bend test (cylindrical mandrel) EN ISO 1520, Paints and varnishes Cupping test EN ISO 1524, Paints, varnishes and printing inks Determination of fineness of grind 1) Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org). BS EN 4688:2012EN 4688:
24、2012 (E) 5 EN ISO 2409, Paints and varnishes Cross-cut test EN ISO 2431, Paints and varnishes Determination of flow time by use of flow cups EN ISO 2811-1, Paints and varnishes Determination of density Part 1: Pyknometer method EN ISO 2811-2, Paints and varnishes Determination of density Part 2: Imm
25、ersed body (plummet) method EN ISO 2811-3, Paints and varnishes Determination of density Part 3: Oscillation method EN ISO 2811-4, Paints and varnishes Determination of density Part 4: Pressure cup method EN ISO 2812-1, Paints and varnishes Determination of resistance to liquids Part 1: Immersion in
26、 liquids other than water EN ISO 2812-2, Paints and varnishes Determination of resistance to liquids Part 2: Water immersion method EN ISO 2813, Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and 85 EN ISO 3251, Paints, varnishes and plastics Determination
27、 of non-volatile-matter content EN ISO 3675, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method EN ISO 3678, Paints and varnishes Print-free test EN ISO 3679, Determination of flash point Rapid equilibrium closed cup method EN ISO 3680, Determination
28、of flash/no flash Rapid equilibrium closed cup method EN ISO 4623-2, Paints and varnishes Determination of resistance to filiform corrosion Part 2: Aluminium substrates EN ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of inten
29、sity of uniform changes in appearance Part 2: Assessment of degree of blistering EN ISO 4628-8, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 8: Assessment of degree of delamination and c
30、orrosion around a scribe EN ISO 4628-10, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 10: Assessment of degree of filiform corrosion EN ISO 6270-1, Paints and varnishes Determination of
31、resistance to humidity Part 1: Continuous condensation EN ISO 9117-1, Paints and varnishes Drying tests Part 1: Determination of through-dry state and through-dry time EN ISO 9117-3, Paints and varnishes Drying tests Part 3: Surface-drying test using ballotini EN ISO 9227, Corrosion tests in artific
32、ial atmospheres Salt spray tests BS EN 4688:2012EN 4688:2012 (E) 6 EN ISO 9514, Paints and varnishes Determination of the pot life of multicomponent coating systems Preparation and conditioning of samples and guidelines for testing EN ISO 11890-1, Paints and varnishes Determination of volatile organ
33、ic compound (VOC) content Part 1: Difference method ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing ISO 7724-1, Paints and varnishes Colorimetry Part 1: Principles ISO 7724-2, Paints and varnishes Colorimetry Part 2: Colour measurement
34、ISO 7724-3, Paints and varnishes Colorimetry Part 3: Calculation of colour differences MIL-PRF-5606H, Performance specification: Hydraulic fluid, petroleum base; aircraft, missile, and ordnance. (NATO H-515) 2)MIL-PRF-6081D, Performance specification: Lubricating oil, jet engine. (NATO O-133) 2)MIL-
35、PRF-23699F, Performance specification: Lubricating oil, aircraft turbine engine, synthetic base, NATO code number O-156 2)MIL-DTL-83133G, Detail specification: Turbine fuel, aviation, kerosene type, JP-8 (NATO F-34), NATO F-35, and JP-8+100 (NATO F-37) 2)AMS 1526B, Cleaner for aircraft exterior surf
36、aces water-miscible, pressure- spraying type 3)AMS 1527B, Standard Practice for Operating Salt Spray (Fog) Apparatus 3)AMS 1533A, Cleaner for exterior aircraft surfaces gel-type, solvent-base 3)ASTM B 117, Cleaner for exterior aircraft surfaces gel-type, solvent-base 4)DEF STAN 68-10, Corrosion Prev
37、entive, Water Displacing NATO Code: C-634 Joint Service Designation: PX-24 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3840 apply. 2) Published by: DoD National (US) MIL. Department of Defense http:/www.defenselink.mil/ 3) Published by: SAE Nation
38、al (US) Society of Automotive Engineers http:/www.sae.org/ 4) Published by: ASTM National (US) American Society for Testing and Materials http:/www.astm.org/ BS EN 4688:2012EN 4688:2012 (E) 7 4 Surface pretreatment In accordance with EN 3837, the surface pretreatment applicable to aluminium alloy te
39、st panels are the following: EN 3837 Procedure A : Sulfochromic pickling in accordance with EN 2334; EN 3837 Procedure B : Chromic acid anodizing in accordance with EN 2101; EN 3837 Procedure C : Chromate conversion coating in accordance with EN 2437. 5 Classification The primer is classified accord
40、ing to the following types: TYPE I: Standard solvent content (VOC 680 g/l); TYPE II: Low volatile organic (VOC 420 g/l); TYPE III: Waterborne (VOC 350 g/l). 6 Batch release and qualification testing 6.1 General The general requirements for qualification and batch release testing shall be in accordan
41、ce with (i.a.w.) EN 3840 and the applicable appendix for the specific material. 6.2 Qualification tests For product qualification, all tests defined in this standard, in the Tables 2 to 7, shall be performed. A minimum of three batches shall be tested for qualification purposes. 6.3 Batch acceptance
42、 testing The Manufacturer shall give evidence on the Test Report or the Certificate of Conformance that all the tests marked with the symbol *in this specification shall be performed for batch acceptance tests. 6.4 Compatibility of waterborne paints to solventborne paints The waterborne primer type
43、III shall be compatible to solventborne primers type I and type II according to this standard and to type I and type II primers to EN 4687. All tests to demonstrate the compatibility are defined in Table 7 and shall be performed. 6.5 Purchaser batch release testing The purchaser may perform any of t
44、he test of this specification deemed necessary to ensure continuing uniform quality in material shipments. BS EN 4688:2012EN 4688:2012 (E) 8 Table 1 General requirements Material description Primer, corrosion inhibiting, for aerospace applications Formulation Base Activator Thinner if appropriate Pr
45、eparation These components shall be mixed in simple whole number proportions, by volume or weight, in accordance with the manufacturers instructions. Technical specification EN 3840 Marking See EN 3840. Storage stability See EN 3840. Application and use Dry film thickness of (25 5) m Drying conditio
46、ns (23 2) C / (50 5) % RH for 7 (seven) days before testing, or after air drying for 4 (four) hours to 6 (six) hours before the application of the topcoat EN 4689. ISO 3270 for 7 (seven) days before application of the top EN 4689. Quality assurance See EN 3840. Designation Primer corrosion inhibitin
47、g Packaging See EN 3840. Health and safety See EN 3840. Table 2 Physical and chemical characteristics Delivery conditions Tests according to EN 3840 Test Test criteria Test requirements * Condition Test method EN ISO 1513 (as received in the original container) Requirement Shall be free from contami
48、nants and show no skinning, gelling, hard settlement, or other defect. 1 * Non volatile matter Test method EN ISO 3251 Requirement % m/m Base Activator Thinner 2 % reference value a b 2 % reference value a b 49 Volatile organic content (VOC) (not Type I) Test method EN ISO 11890-1 Test condition Bas
49、e + Activator + Thinner Requirement g/l reference value acontinued BS EN 4688:2012EN 4688:2012 (E) 9 Table 2 Physical and chemical characteristics Delivery conditions (continued) Tests according to EN 3840 Test Test criteria Test requirements 7 Flash point Test method EN ISO 3679 or EN ISO 3680 Requirement C Base Activator Thinner reference value a reference value a reference
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