1、BRITISH STANDARDBS EN 61086-2:2004Incorporating Corrigendum No. 1Coatings for loaded printed wire boards (conformal coatings) Part 2: Methods of testThe European Standard EN 61086-2:2004 has the status of a British StandardICS 29.035.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g
2、3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61086-2:2004This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 May 2004 BSI 2006ISBN 0 580 43792 2Na
3、tional forewordThis British Standard is the official English language version of EN 61086-2:2004, including Corrigendum January 2005. It is identical with IEC 61086-2:2004. It supersedes BS EN 61086-2:1995 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committe
4、e GEL/15, Insulating material, to Subcommittee GEL/15/3, Material specifications, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publ
5、ications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the nec
6、essary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the inte
7、rpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a ba
8、ck cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Comments15575 Corrigendum No. 128 April 2006 Corrections to Normative References, Clause 6.1.2, Clause 7.8.1.EUROPEAN STANDARD EN 61086-2 NORME EU
9、ROPENNE EUROPISCHE NORM April 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in
10、any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61086-2:2004 E ICS 29.035.20 Supersedes EN 61086-2:1994English version Coatings for loaded printed wire boards (conformal coatings) Part 2: Methods of test (IEC 61086-2:2004) Revtements appliqus sur les cartes de cblage im
11、primes (revtements enrobants) Partie 2: Mthodes dessai (CEI 61086-2:2004) Beschichtungen fr bestckte Leiterplatten (conformal coatings) Teil 2: Prfverfahren (IEC 61086-2:2004) This European Standard was approved by CENELEC on 2004-04-01. CENELEC members are bound to comply with the CEN/CENELEC Inter
12、nal Regulations which 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 Central Secretariat or to any CENELEC me
13、mber. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENEL
14、EC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, S
15、witzerland and United Kingdom. Incorporating Corrigendum January 2005 Foreword The text of document 15C/1546/FDIS, future edition 2 of IEC 61086-2, prepared by SC 15C, Specifications, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN
16、 61086-2 on 2004-04-01. This European Standard supersedes EN 61086-2:1994. This edition, which is presented in a new layout, includes the following significant technical changes from EN 61086-2:1994: a) a new specimen A has been added; b) new cleaning and test procedures have been added. The followi
17、ng dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-04-01 Annex ZA has been add
18、ed by CENELEC. _ Endorsement notice The text of the International Standard IEC 61086-2:2004 was approved by CENELEC as a European Standard without any modification. _ Page 2EN 610862:2004CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references .5 3 Test specimens 6 3.1 Specimen A.6 3.2 Specimen B.7
19、3.3 Specimen C.7 3.4 Specimen D.7 4 Environmental exposure of coated specimens 8 4.1 Thermal cycling Method8 4.2 Thermal shock Method .8 4.3 Thermal ageing .8 4.4 Moisture resistance (damp heat) .8 4.5 Salt mist8 4.6 Cold, low air pressure and damp heat (class 3 only)8 5 Test methods (uncured materi
20、al) 9 5.1 Shelf life9 6 Test methods for electrical properties (coated samples) .9 6.1 Breakdown voltage9 6.2 High frequency dielectric properties (behaviour at resonance).9 6.3 Insulation resistance .9 7 Test methods for non-electrical properties (coated samples) 10 7.1 Visual examination 10 7.2 Th
21、ickness of coating10 7.3 Fluorescence of coating 11 7.4 Tackiness (cure level of coating) .11 7.5 Flexibility.12 7.6 Flammability12 7.7 Mould growth.12 7.8 Resistance to organic solvents 13 7.9 Coating removal 13 Annex A (normative) Specimen of coating material 17 Annex ZA (normative) Normative refe
22、rences to international publications with their corresponding European publications .19 Page 3EN 610862:2004INTRODUCTION This International Standard forms part of a series under the general title Coatings for loaded printed wire boards (conformal coatings). The series consists of three parts: Part 1
23、: Definitions, classification and general requirements (IEC 61086-1) Part 2: Methods of test (IEC 61086-2) Part 3: Specifications for individual materials (IEC 61086-3) Page 4EN 610862:2004Page 5EN 610862:2004COATINGS FOR LOADED PRINTED WIRE BOARDS (CONFORMAL COATINGS) Part 2: Methods of test 1 Scop
24、e This part of IEC 61086 gives the methods of test for electrical insulating materials suitable for application as coatings for loaded printed wire boards (conformal coatings), both as uncured and after application to specific boards. 2 Normative references The following referenced documents are ind
25、ispensable 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. IEC 60068-2-10:1988, Environmental testing Part 2-10:Tests Test J and guidance: Mould growt
26、h IEC 60068-2-11:1981, Environmental testing - Part 2-11: Tests Test Ka: Salt mist IEC 60068-2-14:1984, Environmental testing Part 2-14: Tests Test N: Change of temperature IEC 60068-2-39:1976, Environmental testing Part 2-39: Tests Test Z/AMD: Combined sequential cold, low air pressure and damp hea
27、t test IEC 60058-2-78:2001, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state IEC 60243-1:1998, Electric strength of insulating materials Test methods Part 1: Tests at power frequencies IEC 60243-2:1998, Electric strength of insulating materials Test methods Part 2: Additional
28、 requirements for tests using direct voltage IEC 60249-1:1982, Basic materials for printed circuits Part 1: Test methods IEC 60455-2:1998, Resin based reactive compounds used for electrical insulation Part 2: Methods of test IEC 60707:1999, Flammability of solid non-metallic materials when exposed t
29、o flame sources List of test methods IEC 61086-1, Specification for coatings for loaded printed wire boards (conformal coatings) Part 1: Definitions, classification and general requirements IEC 61086-3 (all parts), Coatings for loaded printed wire boards (conformal coatings) Part 3: Specifications f
30、or individual materials IEC 61086-3-1, Coatings for loaded printed wire boards (conformal coatings) Part 3: Specifications for individual materials Sheet 1: Coatings for general purpose (class I) and for high reliability (class II) ISO/DIS 1514:1984, Paints and varnishes Standard panels for testing
31、ISO 1519: 2002, Paints and varnishes Bend test (cylindrical mandrel) ISO 2808: 1997, Paints and varnishes Determination of film thickness ISO 5636-3:1992, Paper and board Determination of air permeance (medium range) Part 3: Bendtsen method 3 Test specimens 3.1 Specimen A 3.1.1 Test panel The test p
32、anel shall be as in Figure 1. It comprises a) an electrode comb for measurement of insulation resistance, b) a “Y” electrode for measurement of breakdown voltage, c) eight pads for measurement of thickness. The main body of the panel shall be (100 r 0,2) mm2, with a connection tab (84,0 r 0,2) mm x
33、(12,0 r 0,2) mm (see Figure 1). The reverse side of the panel shall be fully etched. 3.1.2 Preparation 3.1.2.1 Apparatus made of polyolefine or similar material is preferred for the preparation procedures. Apparatus made of borosilicate glass may also be suitable: it shall be checked by being rinsed
34、 in freshly prepared solvent (as in 3.1.2.2) immediately before use. Solvent contained in the apparatus shall not decrease in resistivity by more than 10 % over a period of (15 r 1) min. Apparatus used in this test shall be reserved for this use and not used for any other purpose. 3.1.2.2 The panel
35、shall be cleaned in a solvent of 75 % propan-2-ol and 25 % deionized water. Before use, the solvent shall be passed through a mixed bed deionizer column: after this treatment, the conductivity of the solvent at (20 r 2) C shall be not more than 5,0 PSm1. 3.1.2.3 After cleaning, the panel shall be ex
36、tracted with 320 ml of deionized solvent in accordance with 3.1.2.2. The panel shall be placed in a suitable funnel over a vessel of appropriate size and the solvent directed in a fine jet over it, washing both sides. The solvent flow rate shall be such that the extraction takes place over a time of
37、 at least 300 s. The conductivity of the extract shall then be measured at (20 r 2) C, using a suitable conductance meter with an accuracy of r5 % or better. The conductivity of the extract shall be not greater than 50 PSm1. Page 6EN 610862:20043.1.2.4 Commercial equipment is available for preparati
38、on of printed wire boards in production processes. Such equipment may also be suitable for cleaning of these test panels. The quality control indication of this equipment is usually in the form of ionic content, expressed as sodium chloride concentration in microgram per millilitre of solvent or mic
39、rogram per square centimetre of panel. A suitable solution for checking the accuracy of indication contains 1,0 mgl1of sodium chloride in solvent deionized as in 3.1.2.2. This is best prepared by dilution of a stock standard solution (1,000 r 0,001) g NaCl in 1 000 ml deionized water) immediately be
40、fore use, the dilution factor being 1:1 000. NOTE Much of the commercially available equipment is calibrated in units of microgram per square inch. In these units, 1,5 gcm-2is equivalent to 10 gin-2. 3.1.3 Application The coating material to be tested shall be applied to all sides and edges of the p
41、anel by a single “controlled” dip with the longer axis vertical, and then cured in accordance with the manufacturers instructions. If the application is by vapour deposition, the technique to be followed shall be as stated by the manufacturer or supplier. Terminal points shall be suitably masked. 3.
42、2 Specimen B 3.2.1 Test panel The test panel for the tests for tackiness and flexibility shall be soft copper, approximately 100 mm u 50 mm and (0,125 r 0,010) mm in thickness. The panel shall be cleaned by treating with a suitable solvent (for instance xylene-ethanol 1:1), then polished thoroughly
43、with No. 000 steel wool and finally wiped free of any fingermarks or metal particles with the solvent and a lint-free cloth. The panel shall be used immediately (within 1 h) after cleaning. 3.2.2 Application The coating material to be tested shall be applied as for specimen A (see 3.1.3) and cured i
44、n accordance with the manufacturers instructions. 3.3 Specimen C 3.3.1 Test panel The test panel for mould growth test (see 7.7.1) shall consist of polished plate glass approximately 40 mm2, and shall be solvent cleaned as described in ISO 1514. Standard microscope glass slides (75 mm u 25 mm approx
45、imately) may also be used. 3.3.2 Application The coating material to be tested shall be applied as for specimen A (see 3.1.3) and cured in accordance with the manufacturers instructions. 3.4 Specimen D 3.4.1 Test panel The test panel shall be of the same material as for specimen A, but fully etched
46、and with a length of (125 r 5) mm and a width of (13 r 1) mm and a thickness of (0,75 r 0,05) mm. It shall be marked by scribing a line perpendicular to the longer axis (25 r 0,5) mm away from the end which is to be ignited. The panel shall comply with the other requirements given in 4.3.3.3 of IEC
47、60249-1. Page 7EN 610862:20043.4.2 Application The coating material to be tested shall be applied as for specimen A (see 3.1.3) and cured in accordance with the manufacturers instructions. 4 Environmental exposure of coated specimens The environmental exposure techniques below shall be used in conju
48、nction with test methods for coated samples in the sequence specified in IEC 61086-3-1. In some cases, (see Annex A or IEC 61086-3-1), environmental exposures to several different conditions may be carried out on one group of specimens. NOTE A frequently used test schedule is shown in Annex A. 4.1 T
49、hermal cycling Method A sufficient number of specimens A for the subsequent tests shall be exposed in accordance with the requirements of test Nb of IEC 60068-2-14 with temperatures of (55 r 5) C and (125 r 5) C and a temperature change rate of (12 r 2) K/min. The duration of exposure at each temperature shall be (25 r 2) min. The number of cycles shall be 20. 4.2 Thermal shock Method A sufficient number of specimens A for the subsequent tests shall
