Method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite

A technology for coating diatomite and nickel-chromium-aluminum, which is applied in the field of elemental analysis of nickel-chromium-aluminum-coated diatomite, can solve the problems of difficulty in dissolving the sample, long dissolution time, long analysis period, etc., so as to improve the accuracy and the method is accurate and reliable. , the effect of easy operation

Active Publication Date: 2012-10-17
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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AI Technical Summary

Problems solved by technology

In this paper, the method of microwave digestion and dissolution of samples and inductively coupled plasma emission spectrometry for the determination of chromium and aluminum in nickel-chromium-aluminum-coated diatomite solves the problem that the previous samples were difficult to dissolve, the dissolution time was long, and the dissolution of the sample was incomplete. Long, etc. Shortcomings and other difficult problems

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  • Method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite
  • Method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite
  • Method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite

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Embodiment 1

[0035] The content of chromium and aluminum in nickel-chromium-aluminum-coated diatomite is determined by using an inductively coupled plasma emission spectrometer (French JY170). The working conditions and analysis lines of the instrument are as follows: high-frequency frequency: 40.68MHz; incident power: 1.0Kw; reflected power : <15W; argon gas flow: cooling gas flow: 15L / min; sheath gas flow: 0.2L / min; incident slit: 20μm; exit slit: 80μm; 2s; element analysis line: chromium 267.716nm, aluminum 394.401nm;

[0036] (1) The reagents used in the determination process are as follows:

[0037] (1.1), hydrochloric acid, ρ1.19g / mL, superior grade or high purity or MOS grade;

[0038] (1.2), nitric acid, ρ1.42g / mL, superior grade or high purity or MOS grade;

[0039] (1.3), hydrofluoric acid, ρ about 1.15g / mL, excellent grade or high purity or MOS grade;

[0040] (1.4), chromium standard solution with a mass fraction not less than 99.99%: 1.00mg / mL, weigh 0.5000g of high-purity ...

Embodiment 2

[0056] The content of chromium and aluminum in nickel-chromium-aluminum-coated diatomite is determined by using an inductively coupled plasma emission spectrometer (IRIS intrepid II in the United States). The working conditions and analysis lines of the instrument are as follows: high-frequency frequency: 40.68MHz; incident power: 1.15Kw ; Reflected power: <15W; Argon gas flow: cooling gas flow: 15L / min; auxiliary gas flow: 1.0L / min; pump speed: flushing pump speed 120rpm (2.22ml / min); analysis pump speed 120rpm (2.22ml / min min); UV integration time: 3s; element analysis line: chromium 267.716nm, aluminum 394.401nm;

[0057] (1) The reagents used in the determination process are as follows:

[0058] (1.1), hydrochloric acid, ρ1.19g / mL, superior grade or high purity or MOS grade;

[0059] (1.2), nitric acid, ρ1.42g / mL, superior grade or high purity or MOS grade;

[0060] (1.3), hydrofluoric acid, ρ about 1.15g / mL, excellent grade or high purity or MOS grade;

[0061] (1.4), ...

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Abstract

The invention belongs to a nickel-chromium-aluminum coated diatomite element analysis technology, and relates to a method for determining chromium content and aluminum content in nickel-chromium-aluminum coated diatomite, wherein microwave sample digestion and inductively coupled plasma atomic emission spectroscopy are adopted to determine the chromium content and the aluminum content in the nickel-chromium-aluminum coated diatomite. According to the method, 5-10 mL of hydrochloric acid, 1-5 mL of nitric acid and 5-10 drops of hydrofluoric acid are adopted to treat (metal-inorganic non-metal powder) nickel-chromium-aluminum coated diatomite, such that problems of large use amounts of reagents for dissolving the sample, difficult dissolving of the sample, incomplete dissolving of the sample, and the like in the prior art are solved. With the present invention, spectrum analysis is performed to find the best analysis line so as to overcome interference of the major element nickel in the nickel-chrome-aluminum coated diatomite and improve measurement accuracy; the study results show that the established method for determining the chromium content and the aluminum content in the nickel-chromium-aluminum coated diatomite is accurate and reliable, and can meet requirements of research and production; and the method of the present invention has characteristics of rapidness, easy operation, manpower saving and material resource saving.

Description

technical field [0001] The invention belongs to the element analysis technology of nickel-chromium-aluminum-coated diatomite, and relates to a method for measuring the content of chromium and aluminum in nickel-chromium-aluminum-coated diatomite. Background technique [0002] With the development of the national defense industry, new materials are constantly introduced, and the requirements for the composition of various materials with excellent performance are becoming more and more stringent. The content of impurity elements in the alloy has a very important influence on the performance of the material. At present, there is no detection method standard for the analysis of the elemental composition of nickel-chromium-aluminum-coated diatomite at home and abroad. The special structure makes its dissolution time much longer than that of other ordinary superalloys, and if the sample dissolution method of nickel-based and iron-based superalloys is simply applied, there are ofte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
Inventor 付二红杨春晟蒙益林汪磊
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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