1、 IEC 60068-2-20Edition 5.0 2008-07INTERNATIONAL STANDARD Environmental testing Part 2-20:Tests Test T:Test methods for solderability and resistance to soldering heat of devices with leads IEC 60068-2-20:2008(E)LICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIE
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9、22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 60068-2-20Edition 5.0 2008-07INTERNATIONAL STANDARD Environmental testing Part 2-20:Tests Test T:Test methods for solderability and resistance to so
10、ldering heat of devices with leads INTERNATIONAL ELECTROTECHNICAL COMMISSION RICS 19.040 PRICE CODEISBN 2-8318-9919-2 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREA
11、U.2 60068-2-20 IEC:2008(E)CONTENTS FOREWORD.4 1 Scope and object.6 2 Normative references.6 3 Terms and definitions.7 4 Test Ta:Solderability of wire and tag terminations.8 4.1 Object and general description of the test.8 4.1.1 Test methods.8 4.1.2 Specimen preparation.8 4.1.3 Initial measurements.9
12、 4.1.4 Accelerated ageing.9 4.2 Method 1:Solder bath.9 4.2.1 Description of the solder bath.9 4.2.2 Flux.10 4.2.3 Procedure.10 4.2.4 Test conditions.10 4.2.5 Final measurements and requirements.11 4.3 Method 2:Soldering iron at 350 C.11 4.3.1 Description of soldering irons.11 4.3.2 Solder and flux.1
13、2 4.3.3 Procedure.12 4.3.4 Final measurements and requirements.13 4.4 Information to be given in the relevant specification.13 5 Test Tb:Resistance to soldering heat.13 5.1 Object and general description of the test.13 5.1.1 Test methods.13 5.1.2 Initial measurements.14 5.2 Method 1:Solder bath.14 5
14、.2.1 Description of the solder bath.14 5.2.2 Flux.14 5.2.3 Procedure.14 5.2.4 Test conditions.14 5.2.5 De-wetting.15 5.3 Method 2:Soldering iron.15 5.3.1 Description of soldering iron.15 5.3.2 Solder and flux.15 5.3.3 Procedure.15 5.4 Recovery.16 5.5 Final measurements and requirements.16 5.6 De-wet
15、ting(if applicable).16 5.7 Information to be given in the relevant specification.17 Annex A(informative)Example of apparatus for accelerated steam ageing process.18 Annex B(normative)Specification for flux constituents.19 Bibliography.20 Figure 1 Diagram of contact angle.7 LICENSED TO MECON Limited.
16、-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60068-2-20 IEC:2008(E)3 Figure 2 Position of soldering iron.12 Figure A.1 Example of apparatus.18 Table 1 Solderability,Solder bath method:Test severities(duration and temperature).11 Table 2 Resistance to soldering heat,Solder bath method:Test severities(duration and temperature).15 LICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.4 60068-2-20
