1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS X 36
2、: 1998 ICS 49.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Paint remover for air drying selectively removable paint scheme for aerospace purposesThis British Standard, having been prepared under the direction of the Engineering Sector Board, was publis
3、hed under the authority of the Standards Board and comes into effect on 15 April 1998 BSI 1998 The following BSI references relate to the work on this standard: Committee reference ACE/44 Draft for comment 96/709138 DC ISBN 0 580 27996 0 BS X 36 : 1998 Amendments issued since publication Amd. No. Da
4、te Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/44, Protective treatments and aircraft finishes, upon which the following bodies were represented: British Coatings Federation Ltd. Metal Finishing Asso
5、ciation Ministry of Defence National Centre of Tribology Oil and colour Chemists Association Society of British Aerospace CompaniesBS X 36 : 1998 BSI 1998 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Materials 1 5 Performa
6、nce 1 6 Batch inspection 2 7 Marking 2 Annexes Annex A (normative) Type approval 3 Annex B (normative) Determination of freedom from corrosion 3 Tables 1 Composition of reference paint remover 1 2 Tests on paint remover 2 3 Tests on ability to selectively remove the finish and intermediate coats of
7、the reference paint scheme 2 B.1 Test panels 3 List of references Inside back coverii BSI 1998 BS X 36 : 1998 Foreword This British Standard has been prepared by Technical Committee ACE/44 and is one of a series for paints and varnishes suitable for aerospace purposes. It specifies requirements for
8、paint remover used for selectively removing a paint scheme, consisting of an intermediate coating conforming to BS X 35 and a finish conforming to BS X 34, and leaving the primer, conforming to BS X 33, in a good condition for application of further coats. It has been assumed in the drafting of this
9、 British Standard that execution of its provisions is entrusted to appropriately qualified and experienced people. The quality assurance authority and approving authority referred to in this British Standard are as stated in the contract or order, or the accredited representative of the authority st
10、ated, as instructed by the purchaser. WARNING: This British Standard calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to healt
11、h and safety at any stage. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This
12、document comprises a front cover, an inside front cover, a pages i and ii, pages 1 to 4, an inside back cover and a back cover. BSI 1998 1 BS X 36 : 1998 1 Scope This British Standard specifies requirements for paint remover able to selectively remove the finish or finish and intermediate coating of
13、 a defined paint scheme. The paint remover is intended for brush or spray application to paint schemes including an intermediate coating conforming to BS X 35, on metallic and non-metallic surfaces for aerospace purposes. NOTE. This British Standard does not apply to paint remover intended to be use
14、d on paint schemes that do not include an intermediate coat. Annex A gives information on application for type approval. 2 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriat
15、e places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this British Standard only when incorporated in the reference by amendment or revisio
16、n. For undated references, the latest edition of the cited publication applies, together with any amendments. 3 Definitions For the purposes of this British Standard the definitions given in BS 2015 apply. 4 Materials 4.1 Composition The paint remover shall be a homogeneous fluid, of a consistency s
17、uitable for application and paint removal on a vertical surface. It shall not contain chlorinated solvents or materials that are known to damage the environment. The paint remover shall not contain ingredients injurious to composite materials. 4.2 Composition of reference paint remover The reference
18、 paint remover (see table 3) shall conform to table 1. Table 1. Composition of reference paint remover Ingredient Proportion by mass %( m / m ) Benzyl alcohol 37 Thickener 2 (approx.) Wetting agent 1 (approx.) Water 60 (approx.) NOTE. The reference paint remover is for testing purposes and the compo
19、sition given in table 1 is not intended to represent a formulation for practical application. 4.3 Reference paint scheme The reference paint scheme shall comprise a primer conforming to type B of BS X 33. an intermediate paint conforming to BS X 35, and a finish conforming to type B of BS X 34. 5 Pe
20、rformance 5.1 General 5.1.1 The paint remover shall be able to selectively remove the finish from the reference paint scheme on test panels prepared in accordance with annex B of BS X 35 : 1998, and leave the primer in good condition for application of further coats. 5.1.2 Intermediate coating shall
21、 either be completely removed or shall remain intact. 5.1.3 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 remover The paint remover shall conform to table 2. 5.3 Tests for ability to sel
22、ectively remove a paint scheme The paint remover shall conform to table 3.2 BSI 1998 BS X 36 : 1998 Table 2. Tests on paint remover Test Test panel, preparation and paint system Conditions Test method Requirement 1) Condition Components in their original or laboratory containers BS EN ISO 1513 Shall
23、 be free from extraneous matter and shall show no separation, settling or other defect. 2) Volatile organic compound (VOC) content When prepared for application ASTM-D 3960 1 Shall be less than or equal to the reference value. 1) 3) Shelf life After 12 months at 08Ct o3 08 C, components in their ori
24、ginal containers Test 1) of this table, test 1) of table 3 Shall conform to the requirements. 4) Freedom from corrosion Components in their original or laboratory containers Annex B Test panels shall not increase in mass by$1m g nor decrease in mass by $ 5 mg. The substrate shall show no signs of pi
25、tting or formation of adherent deposits, or other signs of corrosion. 1) The reference value shall be established during type approval unless agreed otherwise between manufacturer and purchaser (see annex A). Table 3. Tests on ability to selectively remove the finish or finish and intermediate coats
26、 of the reference paint scheme Test Test panel, preparation and paint system Conditions Test method Requirement 1) Selective paint removal 1) 1) Test 10) of table 3 of BS X 35 : 1998 Shall equal or exceed the performance of the reference paint remover (4.2). 2) Scheme restoration 2) 2) Test 11) of t
27、able 3 of BS X 35 : 1998 Shall pass the test. 1) See test 10) of table 3 of BS X 35 : 1998. 2) See test 11) of table 3 of BS X 35 : 1998. 6 Batch inspection Before despatch, a representative sample of each batch of material, taken in accordance with BS EN 21512, shall be tested to confirm conformity
28、 to tests 1 and 4 of table 2, and, when prepared in accordance with annex B, the scheme shall conform to tests 1 and 2 of table 3. NOTE. Samples of material and material ingredients may be inspected at any stage of manufacture, and from any portion of the batch. 7 Marking In addition to any statutor
29、y requirements each container shall be legibly and durably marked with at least the following: a) a description of the material; b) the number and date of this British Standard, i.e. BS X 36 : 1998; c) the manufacturers name and recognized trade mark; d) the batch number; e) the date of manufacture.
30、BS X 36 : 1998 BSI 1998 3 Table B.1 Test panels Metal Preparation Aluminium alloy conforming to BS L 163 Prepare in accordance with BS EN 2334. Magnesium alloy conforming to type AZ31 of BS 3370 Acid chromate in accordance with bath iv of clause 2 of annex II of DTD 911C 2, and A.5.3 of BS 2L 500 :
31、1973. Before use, remove the chromate film from the panels by immersing in a boiling aqueous solution of 150 g/l chromium (VI) oxide for 15 min, followed by swabbing under running water and rinsing in deionized water conforming to grade 2 of BS EN ISO 3696. Copper conforming to C101 of BS 2870, half
32、 hard Freshly pickle in accordance with method R2 of DEF STAN 03-2 3 (bright dip). Steel conforming to BS EN 605 Freshly burnish in accordance with BS EN 605. Cadmium plated steel conforming to BS EN 605 Cadmium plate to a bright finish in accordance with DEF STAN 03-19 4, but do not passivate. Age
33、for not less than four weeks after plating and dip in an aqueous solution of sodium dichromate in accordance with DEF STAN 03-33 5 immediately before use. Annex A (normative) T ype approval A.1 If the manufacturer is required to prove product conformity to this British Standard, the following shall
34、be provided: a) test results conforming to this British Standard; b) wet samples of all materials; c) a declaration of composition, including the percentage and nature of all ingredients; d) reference values if required, e.g. VOC content. A.2 After type approval has been granted, there shall be no c
35、hange in the product formulation unless this is approved by the approving authority. Annex B (normative) Determination of freedom from corrosion B.1 Preparation of test panels Use test panels of each of the metals specified in table B.1, prepared as described in table B.1, of 75 mm3 25 mm and (0.8 t
36、o 1.2) mm nominal thickness. Degrease the panels, with a hydrocarbon solvent, in accordance with BS EN ISO 1514, and rinse in an equal mixture by volume of acetone conforming to BS 509 : Part 1 and industrial methylated spirit conforming to BS 3591. Dry in an oven at (105 2)8C for 30 min. Cool in a
37、desiccator and weigh each panel to 0.1 mg. B.2 Procedure Completely immerse the panels in paint remover in glass test tubes. Stopper the tubes and leave for 168 h. Rinse the panels thoroughly under cold running water, gently swabbing the surfaces with cotton wool. Rinse in an equal mixture by volume
38、 of acetone conforming to BS 509 : Part 1 and methylated spirit conforming to BS 3591. Take care not to remove any corrosion products from the panels. Dry at (105 2)8Cf o r3 0m i n and re-weigh. Examine for any visible evidence of corrosion or etching under3 10 magnification.4 blank BSI 1998 BS X 36
39、 : 1998 1) In preparation. List of references (see clause 2) Normative references BSI publications BRITISH STANDARDS INSTITUTION, London BS 509 : Acetone for industrial use BS 509 : Part 1 : 1987 Specifications for acetone BS 2015 : 1992 Glossary of paint and related terms BS 2870 : 1980 Specificati
40、on for rolled copper and copper alloys: sheet, strip and foil BS 3370 : 1970 Specification for wrought magnesium alloys for general engineering purposes Plate, sheet and strip BS 3591 : 1985 Specification for industrial methylated spirits BS L 163 : 1978 Specification for sheet and strip of aluminum
41、-coated aluminumcoppermagnesiumsiliconmanganese alloy (solution treated, cold-worked for flattening and aged at room temperature) (Cu 4.4, Mg 0.5, Si 0.8, Mn 0.8) BS 2L 500 : 1973 Procedure for inspection and testing of wrought magnesium-base alloys BS 2X 33 : 1998 Specification for two component ep
42、oxy primer for aerospace purposes BS X 34 : 1998 Specification for two component polyurethane finish for aerospace purposes BS X35 : 1998 Specification for selectively removable intermediate coating for aerospace purposes BS EN 605 : 1992 Paints and varnishes Standard panels for testing BS EN 2334 1
43、) : 1992 Paints and varnishes Determination of through-dry state and through-dry time Method of test BS EN 23270 : 1991 Specification for temperatures and humidities for conditioning and testing paints, varnishes and their raw materials BS EN ISO 1513 : 1995 Paints and varnishes Examination and prep
44、aration of samples for testing BS EN ISO 1520 : 1995 Paints and varnishes Cupping test BS EN ISO 3696 : 1995 Water for analytical laboratory use Specification and test methods Other publications 1 ASTM-D 3960 Standard practice for determining VOC content of paints and related coatings ASTM, 100 Barr
45、 Harbor Drive, West Conshohocken, PA 19428. 2 DTD 911C Process specification Protection of magnesium rich alloys, Technical Indexes Ltd., Willoughby Rd, Bracknell, Berks., RG12 8DW 3 DEF STAN 03-2 Cleaning and preparation of metal surfaces, Ministry of Defence, Directorate of Standardization, Kentig
46、ern House, 65 Brown Street, Glasgow G2 8EX. 4 DEF STAN 03-19 Electro-deposition of cadmium. Ministry of Defence. Directorate of Standardization, Kentigern House, 65 Brown Street, Glasgow G2 8EX 5 DEF STAN 03-33 Chromate passivation of cadmium and zinc surfaces, Ministry of Defence, Directorate of St
47、andardization, Kentigern House, 65 Brown Street, Glasgow G2 8EX.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
48、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions
49、 British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an in
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