Application of atomic emission spectrometry with inductively coupled plasma for the analysis of electrolytes during electrolytic extraction of the phases of nickel alloys

Dvoretskov R.M., Baranovskaya V.B., Mazalov I.S., Karachevtsev F.N.
UDC
669.245
DOI
10.18577/2307-6046-2018-0-12-107-120
Article PDF (Russian) (1.1 MB)
How to cite
Dvoretskov R.M., Baranovskaya V.B., Mazalov I.S., Karachevtsev F.N. Application of atomic emission spectrometry with inductively coupled plasma for the analysis of electrolytes during electrolytic extraction of the phases of nickel alloys // Proceedings of VIAM. 2018. No. 12. DOI: 10.18577/2307-6046-2018-0-12-107-120. URL: https://test.viam.ru/en/journal/2018/12/12
Keywords
atomic emission spectrometry, inductively coupled plasma, electrolyte analysis, phase extraction, electrolytic dissolution, anodic residue, phase analysis, heat resistant nickel alloys.
Abstract

To improve the accuracy of quantitative evaluation of the phase composition of high-alloyed alloys, electrolytic phase extraction is used, which includes anodic dissolution of the alloy sample in a specially selected electrolyte for passivation of the corresponding components, study of the phase and chemical composition of the passivated anodic residue and using the results of these studies for calculating the mass fraction of phases in the sample alloy and distribution of elements between phases. A scheme has been proposed for studying the quantitative phase composition of nickel alloys using electrolytic extraction of phases in which the chemical composition of the anodic residue is determined by the difference in the concentrations of elements in the alloy and in the electrolyte after the extraction. To determine the elements dissolved in the electrolyte, the method of atomic emission spectrometry with inductively coupled plasma was used. The model solutions were used to investigate the interfering effects of the components of five electrolytes in the inductively coupled plasma atomic emission analysis of electrolytes after electrolytic extraction of the phases of nickel alloys. In order to minimize the influence of electrolyte components on the analytical signal of the elements being detected, it is recommended to electrolytically dissolve samples of nickel alloys to a mass of not less than 0.25 g per 250 ml of electrolyte, so that the electrolyte can be diluted. Methods for compensating disturbing influences are chosen - using solutions of standard samples of nickel alloys and internal standardization. An internal standard line Indium 230.606 nm is selected. The suitability of the presented research scheme for evaluation of the quantitative phase composition of samples of ZhS6K and VZh159 alloys using electrolytic extraction and inductively coupled plasma atomic emission analysis of the electrolytes was carried out. A compari

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