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ISO 9454-2 pdf free download

ISO 9454-2-2020 pdf free download.Soft soldering fluxes – Classification and requirements – Part 2: Performance requirements.
This document specifies the performance requirements for fluxes in solid, liquid and paste forms intended for use with soft solders.
NOTE 1 ISO 9454-1 specifies the requirements for labelling and packaging as well as the coding system for the classification of the fluxes.
NOTE 2 Some of the fluxes intended for inert gas and vapour phase soldering may not pass some of the criteria in Tables 1 and 2.
Requirements for these fluxes are agreed between the purchaser and the supplier.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 9455-3:20 19, Soft soldering fluxes — Test methods — Part 3: Determination of acid value, potentiometric and visual titration methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.orgJobp
— I EC Elect ropedia: available at http://www.electropedia.org/
3.1 flux
chemical substance in a form which assists molten solder to wet metal surfaces to be joined, by removing oxides and related contaminants from the solder and from the surfaces of the parts during soldering
Note 1 to entry: Flux can be in solid, liquid or paste form.
3.2 liquid flux
solution of a flux in a suitable liquid solvent
3.3 paste flux
solution or uniform dispersion of flux in a suitable viscous medium
ISO 9454-2:2020(E)
3.4 colophony
hard, natural resin, extracted from the oleoresin of pine trees and refined, consisting of abietic and pimaric acids and their isomers, some organic fatty acids and terpene hydrocarbons
Note 1 to entry: These natural rosins, or modified rosins. should give a positive reaction to the Liehermann and Storch test lU and shall have an acid value greater than 155 mg KOH/g.
3.5 resin
general, non-specific. widely accepted term for natural and synthetic resinous products
3.6 activator
substance which increases the chemical reactivity of a flux
3.7 organic type Aux
flux which is based on non-rosin organic substances
3.8 inorganic type flux
flux containing inorganic acids or alkalis, or their salts
4 Flux condition
Solid fluxes shall be of uniform composition and be free from foreign matter or impurities deleterious
to the fluxing action.
Liquid fluxes shall be homogeneous and free from sediment.
Paste fluxes shall be of a uniform viscous form and of a consistency suitable for application to the surface to be soldered.
5 Performance requirements for fluxes
When tested in accordance with the appropriate test methods given in the various parts of the ISO 9455 series, fluxes shall comply with the requirements given in Tables 1 to 3.
When determining the acid value for type 2 fluxes in accordance with ISO 9455-3:2019, the value forS in ISO 9455-3:2019, 4.5 of the method is to be taken as 100.
NOTE It is worth noting that, because of the difference between the chemicals in flux types 1 and 2, the values for acid value (see ISO 9455-3), and for halide content (see ISO 9455-6), are expressed on different bases and are not, therefore, comparable.ISO 9454-2 pdf download.

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