ISO 7529:2017
International Standard
Current Edition
·
Approved on
27 October 2017
Nickel alloys — Determination of chromium content — Potentiometric titration method with ammonium iron(II) sulfate
ISO 7529:2017 Files
English
5 Pages
Current Edition
USD
53.77
ISO 7529:2017 Scope
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.
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