ISO 9455:2022

Description

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.