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1、BRITISH STANDARD AEROSPACE SERIES BS X 38:2005 Heat curing paint scheme for aerospace purposes Specification ICS 49.040; 87.040 ? Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 This British Standa
2、rd was published under the authority of the Standards Policy and Strategy Committee on 1 February 2005 BSI 1 February 2005 The following BSI references relate to the work on this British Standard: Committee reference ACE/65 Draft for comment 04/30080333 DC ISBN 0 580 45190 9 Committees responsible f
3、or this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/65, Non-metallic materials for aerospace purposes (excluding textiles), upon which the following bodies were represented: British Hydromechanics Research Group British Plastics Federation Socie
4、ty of British Aerospace Companies The following bodies were also represented in the drafting of this standard through subcommittees and panels: British Coatings Federation Ltd. Ministry of Defence UK Defence Standardization Oil and Colour Chemists Association Amendments issued since publication Amd.
5、 No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 BSI 1 February 2005 i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Normative references1 3Terms and de
6、finitions2 4Materials2 5Performance2 6Batch inspection2 Annex A (normative) Type approval6 Annex B (normative) Preparation of test panels6 Table 1 Tests on liquid paint, type A3 Table 2 Tests on liquid paint, type B3 Table 3 Tests on dry film, type A4 Table 4 Tests on dry film, type B5 Licensed Copy
7、: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 ii BSI 1 February 2005 Foreword This British Standard has been prepared by Technical Committee ACE/65 and is one of a series for paints and varnishes suitable for
8、 aerospace purposes. It covers the specification of heat curing paint for aerospace applications up to 220 C. It has been assumed in the drafting of this standard that the execution of its provisions is entrusted to appropriately qualified and experienced people. The quality assurance authority and
9、approving authority referred to in the standard are as stated in the contract or order, or the accredited representative of the authority stated, as instructed by the purchaser. WARNINGThis British Standard calls for the use of substances and/or procedures that may be injurious to health if adequate
10、 precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applicat
11、ion. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document i
12、ndicates when the document was last issued. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 BSI 1 February 2005 1 1 Scope This British Standard specifies requirements for the materials and performa
13、nce of two types of heat curing paint for aerospace applications up to 220 C. Type A materials are intended for use either as a sealer/primer coat for magnesium alloy, pre-treated to BS M 93, or for ferrous and non-ferrous substrates as a primer coat, containing chromate pigment, which may be over-c
14、oated with type B if required. Type B materials are intended as a finish over type A. The heat curing paint is intended to give protection against corrosion and resistance to aircraft fluids. Information on application for type approval is provided in Annex A. 2 Normative references The following re
15、ferenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS 2015:1992, Glossary of paint and related terms. BS 3900-A2/BS
16、EN ISO 1513, Paints and varnishes Examination and preparation of samples for testing. BS 3900-A23:2000/BS EN ISO 11890-1:2001, Paints and varnishes Determination of volatile organic compound (VOC) content Part 1: Difference method. BS 3900-B18/BS EN ISO 3251, Paints, varnishes and plastics Determina
17、tion of non-volatile-matter content. BS 3900-D1/BS EN ISO 3668, Paints and varnishes Visual comparison of the colour of paints. BS 3900-E1/BS EN ISO 1519, Paints and varnishes Bend test (cylindrical mandrel). BS 3900-E6:1996/BS EN ISO 2409:1995, Paints and varnishes Cross-cut test. BS 3900-E13/BS EN
18、 ISO 6272, Paints and varnishes Falling-weight test. BS 3900-F12/BS EN ISO 7253, Paints and varnishes Determination of resistance to neutral salt spray (fog). BS 3900-G5:1993/BS EN ISO 2812-1:1995, Paints and varnishes Determination of resistance to liquids, general methods. BS 7079-D2/ISO 8504-2, P
19、reparation of steel substrates before application of paints and related products Surface preparation methods Abrasive blast cleaning. BS L 163 (obsolescent), Specification for sheet and strip of aluminium-coated aluminium-copper- magnesium-silicon-manganese alloy (solution treated, cold worked for f
20、lattening and aged at room temperature) (Cu 4.4, Mg 0.5, Si 0.8, Mn 0.8). BS M 93, Protection of magnesium-rich alloys against corrosion. BS EN 23270/ISO 3270, Specification for temperatures and humidities for conditioning and testing paints, varnishes and their raw materials. BS EN ISO 1518:2001/BS
21、 3900-E2:1992, Paints and varnishes Scratch test. BS EN ISO 2813:2000, Measurement of specular gloss of non-metallic paint films at 20, 60 and 85. BS EN ISO 3248/BS 3900-G7, Paints and varnishes Determination of the effect of heat. BS EN ISO 15528, Paints, varnishes and raw materials for paints and
22、varnishes Sampling. BS ISO 3116:2001, Magnesium and magnesium alloys Wrought magnesium alloys. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 2 BSI 1 February 2005 3 Terms and definitions For the
23、purposes of this British Standard, the terms and definitions given in BS 2015 apply. 4 Materials 4.1 Composition 4.1.1 Type A materials shall consist of any suitable resin or mixture of resins. Type A materials shall normally be free of pigment although: suitable chromate pigments that will not undu
24、ly affect the stability of the material as prepared for use, and/or minor quantities of pigment dyestuff that will not opacify the film, not interfere with its properties in any way, nor bleed through into subsequent coatings may be included. 4.1.2 Type B materials shall consist of any suitable resi
25、n or mixture of resins and be pigmented with suitable pigments which will not unduly affect the stability of the material as prepared for use. 4.2 Scheme components 4.2.1 General Components used in tests on type A coatings as part of a paint scheme shall conform to 4.2.2 and 4.2.3. 4.2.2 Type A (pri
26、mer/sealer) Type A coatings shall conform to this British Standard. 4.2.3 Type B (finish) Type B coatings shall conform to this British Standard unless otherwise specified. NOTEThe performance of a scheme including components otherwise specified might be suitable but should be separately assessed. 5
27、 Performance 5.1 General 5.1.1 The test panels shall be prepared and coated as described in Annex B. 5.1.2 Unless otherwise specified, all tests shall be carried out in temperature and relative humidity conditions conforming to BS EN 23270. 5.2 Tests on liquid paint Type A shall conform to Table 1.
28、Type B shall conform to Table 2. 5.3 Tests on dry paint Type A shall conform to Table 3. Type B shall conform to Table 4. 6 Batch inspection Before dispatch, a representative sample of each batch of material, taken in accordance with BS EN ISO 15528, shall be tested to confirm conformity to tests 1,
29、 4 and 5 of Table 1 and Table 2, and when prepared in accordance with Annex B, the scheme shall conform to tests 2, and 3 (not B.1.2) of Table 3 and to tests 1, 2, 4, and 5 (not B.1.2) of Table 4. NOTESamples of material and material ingredients may be inspected at any stage of manufacture, and from
30、 any portion of the batch, by the quality assurance authority. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 BSI 1 February 2005 3 Table 1 Tests on liquid paint, type A Table 2 Tests on liquid pa
31、int, type B TestTest panel, preparation and paint system ConditionTest methodRequirement 1. ConditionMaterial in its original or laboratory container BS 3900-A2Shall be free from extraneous matter and shall show no skinning, gelling, hard settlement or other defect that may prevent satisfactory appl
32、ication of a defect free film 2. Volatile organic compound (VOC) content When prepared for application as specified in B.2.1 BS 3900-A23Shall be less than or equal to the reference valuea 3. Shelf lifeAfter 12 months at 5 C to 25 C, material in its original container Tests 1, 4 and 5 of this table S
33、hall conform to the requirements 4. ApplicationB.1.3, B.224 h after applicationVisual examination with normal corrected vision Paint film shall show an even finish, free from runs, sags, wrinkling, pin-holing or other defect 5. Solids contentWhen prepared for application as specified in B.2.1 withou
34、t any addition of thinners BS 3900-B18Shall be 3 % of the reference valuea a The reference value shall be established during type approval unless agreed otherwise between manufacturer and purchaser (see Annex A). TestTest panel, preparation and paint system ConditionTest methodRequirement 1. Conditi
35、onMaterial in its original or laboratory container BS 3900-A2Shall be free from extraneous matter and shall show no skinning, gelling, hard settlement or other defect that may prevent satisfactory application of a defect free film 2. Volatile organic compound (VOC) content When prepared for applicat
36、ion as specified in B.2.1 BS 3900-A23Shall be less than or equal to the reference valuea 3. Shelf lifeAfter 12 months at 5 C to 25 C, material in its original container Tests 1, 4 and 5 of this table Shall conform to the requirements 4. ApplicationB.1.3, B.324 h after applicationVisual examination w
37、ith normal corrected vision Paint film shall show an even finish, free from runs, sags, wrinkling, pin-holing or other defect 5. Solids contentWhen prepared for application as specified in B.2.1 without any addition of thinners BS 3900-B18Shall be 3 % of the reference valuea a The reference value sh
38、all be established during type approval unless agreed otherwise between manufacturer and purchaser (see Annex A). Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS X 38:2005 4 BSI 1 February 2005 Table 3 Tests
39、 on dry film, type A TestTest panel, preparation and paint system ConditionTest methodRequirement 1. Flexibility (impact) B.1.3, B.224 h after applicationBS 3900-E13 (coating downwards) There shall be no cracking at an indentation depth of 3.8 mm 2. Flexibility (bend) B.1.3, B.224 h after applicatio
40、nBS 3900-E1, using a type 1 apparatus with a 10 mm mandrel The coating shall not become damaged or detached 3. Adhesion (cross hatch) B.1.1, B.2 B.1.2, B.2 B.1.3, B.2 24 h after applicationBS 3900-E6, 1 mm spacing kclass 1 4. Hardness (scratch) B.1.3, B.224 h after applicationBS EN ISO 1518:2001 The
41、re shall be no penetration of the needle to the substrate under a load of 2 000 g 5. Hydraulic fluid resistance B.1.3, B.224 h after application, cut paint film through to substrate diagonally to form a crosscut; immerse at (70 2) C in tri-n-butyl phosphate for 168 h a) Method 1, procedure A of BS 3
42、900-G5:1993 One hour after removal, shall show no blistering or other film defects b) BS EN ISO 1518:2001; scratch on reverse side to crosscut One hour after removal, shall show no penetration of the needle to the substrate under a load of 1 200 g 6. Heat resistanceB.1.1, B.2 B.1.2, B.2 24 h after a
43、pplication, cut paint film through to substrate diagonally to form a crosscut; at (220 2) C for 1 000 h BS EN ISO 3248; place test panels in an air circulating oven at room temperature in an upright position On cooling to room temperature, shall show no blistering or other film defects 7. Corrosion
44、resistance (salt spray) B.1.1, B.324 h after application, cut paint film through to substrate diagonally to form a crosscut; 250 h BS 3900-F12There shall show no blistering or other film defects. Corrosion shall not spread more than two millimetres from the crosscut. There shall be no corrosion pitt
45、ing deeper than the diameter of the pit. B.1.2, B.224 h after application, cut paint film through to substrate diagonally to form a crosscut; 750 h 8. Corrosion resistance (cyclic heat/salt spray) B.1.1, B.324 h after application, cut paint film through to substrate diagonally to form a crosscut; 10
46、 cycles of the following cycle: at (220 2) C for 2 h, 10 h in salt spray BS 3900-F12There shall show no blistering or other film defects. Corrosion shall not spread more than two millimetres from the crosscut. There shall be no corrosion pitting deeper than the diameter of the pit. B.1.2, B.324 h af
47、ter application, cut paint film through to substrate diagonally to form a crosscut; 10 cycles of the following cycle: at (220 2) C for 2 h, 10 h in salt spray Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
48、X 38:2005 BSI 1 February 2005 5 Table 4 Tests on dry film, type B TestTest panel, preparation and paint system ConditionTest methodRequirement 1. ColourB.1.3, B.324 h after application, under diffuse daylight BS 3900-D1Shall match the colour specified by the purchaser 2. Specular glossB.1.3, B.324 h
49、 after application using a 60 gloss meter BS EN ISO 2813:2000, using a type 1 apparatus with a 10 mm mandrel Shall be as followsa: high gloss, 85 units or above; semi-matt, (15 3) units; matt,k5 units 3. Flexibility (impact) B.1.3, B.324 h after applicationBS 3900-E13 (coating downwards) There shall be no cracking at an indentation depth of 3.8 mm 4. Flexibility (bend) B.1.3, B.324 h after applicationBS 3900-E1, using a type 1 apparatus
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