1 Scope
This document specifies three quantitative methods for the determination of the ionic
halide (excluding fluoride) content of soldering fluxes. Halides are calculated as
chlorides. A useful qualitative test method for the detection of ionic halides is
also described.
Method A is a potentiometric titration method for the determination of halide (excluding
fluoride) content and is applicable to flux classes 1 and 2, defined in ISO 9454‑1. This method, which is considered the reference method for these fluxes, is suitable
for halide contents generally within the range of 0,05 % mass fraction to 2 % mass
fraction in the non-volatile matter of the flux.
Method B is a titration method for the determination of the total halide (excluding
fluoride) content of water-soluble fluxes. It is applicable to flux classes 2122 to
2124, 3112 to 3114 and 3212 to 3214, as defined in ISO 9454‑1.
Method C is a titration method for the determination of the halide (excluding fluoride)
content of water-soluble fluxes containing phosphates and is applicable to flux class
331, as defined in ISO 9454‑1.
Method D is a qualitative test, using silver chromate test paper, for the presence
of ionic halides. The technique can be used for all classes of flux.
BS EN ISO 9455-6:2022 history
2023BS EN ISO 9455-6:2022 Soft soldering fluxes. Test methods. Determination and detection of halide (excluding fluoride) content
1997BS EN ISO 9455-6:1997 Soft soldering fluxes - Test methods - Determination and detection of halide (excluding fluoride) content