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BS EN ISO 9455-16:2013 pdf free

BS EN ISO 9455-16:2013 pdf free.Soft soldering fluxes一Test methods
This part of ISO 9455 specifies a method for the assessment of the efficacy of a soft soldering flux, known as the wetting balance method. It gives a qualitative assessment of the comparative efficacy of two fluxes (for example, a standard and a test flux), based on their capacity to promote wetting of a metal surface by liquid solder. The method is applicable to all flux types in liquid form classified in ISO 9454-1.
NOTE It is hoped that future developments using improved techniques for obtaining a reproducible range of test surfaces will enable this method for assessing flux efficacy to be quantitative. For this reason, several alternative procedures for preparing the surface of the test piece are included in the present method.
The following referenced 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.
ISO 9453, Soft solder alloys一Chemical compositions and forms
ISO 9454-1, Soft soldering fluxes一Classfication and requirements一Part 1: Classification, labelling and packaging
IEC 60068-2-20:2008, Environmental testing一Part 2-20: Tests- Test T: Test methods for solderability and resistance to soldering heat of devices with leads
IEC 60068-2-54, Environmental testing一Part 2-54: Tests一Test Ta: Solderability testing of electronic components by the wetting balance method
IEC 60068-2-78:2001, Environmental testing一Part 2-78: Tests; Test Cab: Damp heat, steady state
The test pieces shall be handled with clean tongs throughout. Select sufficient test pieces (see Clause 7) to allow 10 per test flux and 10 per standard flux. Degrease them in acetone (5.2) and allow to dry.Immerse them for 20 s in the acid cleaning solution (5.1) at room temperature. Remove the test pieces from the acid cleaning solution and wash for about five seconds under running tap water. Rinse with distilled or deionized water then acetone (5.2) and dry with acid-free filter paper (6.3).
If required, the test pieces may be stored in acetone after rinsing them in deionized water. When needed, they shall be removed from the acetone and dried with acid-free filter paper (6.3).
Subject all the test pieces to one of the ageing procedures given in 8.1.2 to 8.1.4 as agreed between the flux supplier and the customer.BS EN ISO 9455-16 pdf download.

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