ISO 7529:2017
Current
The latest, up-to-date edition.
Nickel alloys — Determination of chromium content — Potentiometric titration method with ammonium iron(II) sulfate
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English
27-10-2017
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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.
| Committee |
ISO/TC 155
|
| DevelopmentNote |
Supersedes ISO/DIS 7529. (10/2017)
|
| DocumentType |
Standard
|
| Pages |
5
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Supersedes |
| ISO 9725:2017 | Nickel and nickel alloy forgings |
| ISO 385:2005 | Laboratory glassware — Burettes |
| ISO 1042:1998 | Laboratory glassware — One-mark volumetric flasks |
| ISO 648:2008 | Laboratory glassware — Single-volume pipettes |
| ISO 5725:1986 | Precision of test methods Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests |
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