Résumé
ISO 7529:2017 specifies a potentiometric titration method for the determination of chromium content in nickel alloys which do not contain insoluble carbides and which have a vanadium content less than a mass fraction of 0,2 %. The method is applicable to chromium contents between a mass fraction of 5 % and a mass fraction of 22 %.
Vanadium, which can be present as an impurity in the alloy, will give a positive bias interference. However, at a level of a mass fraction of 0,2 %, this bias is equivalent to a mass fraction of 0,068 % chromium, which is about half the reproducibility of the method.
Informations générales
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État actuel: PubliéeDate de publication: 2017-10Stade: Norme internationale confirmée [90.93]
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Edition: 2
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Comité technique :ISO/TC 155ICS :77.120.40
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Cycle de vie
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Précédemment
AnnuléeISO 7529:1989
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Actuellement