Nickel alloys - Determination of chromium content - Potentiometric titration method with ammonium iron(II) sulfate
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.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 7529 |
| Publication Date | Oct. 1, 2017 |
| Language | en - English |
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| Supercedes | |
| Committee | ISO/TC 155 |
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