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BS EN ISO 9455-5:2014 pdf free

BS EN ISO 9455-5:2014 pdf free.Soft soldering fluxes一Test methods一Copper mirror test
For flux samples in the form of a solid or paste, and for flux-cored solder, a flux test solution containing 25 % (m/m) of solids is prepared. For liquid flux samples, the liquid is used full strength as the flux test solution. The flux test solution is then evaluated in terms of its attack on a copper film previously vacuum deposited onto a glass plate (copper mirror). A rosin reference solution, which should not cause removal of the copper film, is used as a control. The object of the test is to determine the flux reactivity due to the presence of free halide activators.
NOTE The presence of amines in the flux can cause misleading results in that the flux appears to pass the test, when in fact it has a highly reactive composition.
Cut a length of the flux-cored solder with a mass of approximately 150 g and seal the ends by crimping. Wipe the surface clean with a cloth moistened with acetone (see 4.1). Place the sample in a beaker, add sufficient water to cover the sample, and boil for 5 min to 6 min. Remove the sample, rinse it with acetone (see 4.1), and allow to dry.
While protecting the solder surface from contamination, cut the sample into short lengths (maximum 19 mm) using a razor blade so as not to crimp the cut ends. Place the cut segments into the extraction tube of a clean Soxhlet extraction apparatus (see 5.3) and extract the flux with propan-2-ol (see 4.2, but see also until the return condensate is clear.
Determine the non-volatile matter content of the extract using the method in ISO 9455-1 or ISO 9455-2, and adjust the content by evaporation or by dilution with propan-2-ol (see 4.2, but see also to 25 % by mass to produce the flux test solution.
Select two copper mirrors (see 5.2) free from visible defects. Immediately before carrying out the test in 6.3, immerse the copper mirrors in the EDTA (see 4.5) for not more than 5 s, to remove any copper oxide.Rinse immediately in running water, then in acetone (see 4.1) and dry using warm air. BS EN ISO 9455-5 pdf free download.

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