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BS EN ISO 9455-6-1997
Soft soldering fluxes. Test methods. Determination and detection of halide (excluding fluoride) content
适用范围：This part of ISO 9455 specifies three quantitative methods for the determination of the ionic halide (ex-cluding fluoride) content of soldering fluxes. Halides are calculated as chlorides. A useful qualitative test method for the detection of ionic halides is also de-scribed. 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 to be considered the reference method for these fluxes, is suitable for halide contents generally within the range 0,05 % (m/m) to 2 % (m/m) 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 2.1.2.A and 3.1.1.A, 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 applica-ble to flux class 3.2.1 A 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 may be used for all classes of flux.
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