Method for determining nickel content in nickel-chromium-aluminum coated diatomite
A technology of diatomite-coated and nickel content, which is applied in the field of nickel-chromium-aluminum-coated diatomite element analysis, can solve the problems of incomplete dissolution of nickel-chromium-aluminum-coated diatomite samples, long sample dissolution time, and long analysis cycle. Achieve the effect of rapid measurement, accurate and reliable method, and easy operation
Inactive Publication Date: 2012-10-17
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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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 methods used in the current work of many testing centers are the method standards for nickel-based superalloys. The special structure makes its dissolution time much longer than that of other common superalloys, and if the sample dissolution method of nickel-based and iron-based superalloys is simply applied, there are often incomplete dissolution of nickel-chromium-aluminum-coated diatomite samples. The phenomenon
[0003] Regarding the analysis of nickel in nickel-chromium-aluminum-coated diatomite, there is currently no clear and accurate analysis method at home and abroad. Basically, the method of nickel-based superalloy is applied mechanically. The method has a long time to dissolve the sample, and the sample is not completely dissolved, etc. Shortcomings such as long analysis cycle
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[0050] Microwave digestion was used to dissolve the samples, and the working conditions of the microwave digestion instrument (Anton paar multiwave3000) were as follows:
[0051] Table 1 Microwave digestion conditions and acid dosage
[0052]
[0053] (1) The reagents used in the determination process are as follows:
[0054] (1.1), citric acid solution: 500g / L;
[0055] (1.2) Ammonia buffer solution: Weigh 67g of ammonium chloride, add 570mL of ammonia water, dilute to 1000mL with water, and mix well;
[0056] (1.3), 10gL ethanol solution of dimethylglyoxime solution: dissolve 5g dimethylglyoxime in 500mL ethanol;
[0057] (1.4) Nickel standard solution with a mass fraction not less than 99.9%: 1.00mg / mL, weigh 1.0000g, put it in a 300mL beaker, add 20mL nitric acid 1+1, heat to dissolve. Add 50mL of water and boil to remove nitrogen oxides. Cool to room temperature, transfer to a 1000mL volumetric flask, dilute with water to the mark, and shake well;
[0058] (1.5), ED...
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The invention belongs to a nickel-chromium-aluminum coated diatomite element analysis technology, and relates to a method for determining nickel content in 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, a classical chemical method-dimethylglyoxime-EDTA volumetric method is adopted to determine the nickel content in the nickel-chromium-aluminum coated diatomite, and an appropriate standard substance is adopted as a control so as to improve accuracy of analytical measurement; the study results show that the established method for determining the nickel 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 nickel content 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 methods used in the current work of many testing centers are the method standards for nickel-based superalloys. The special structure makes its dissolution time much longer than that of other common superalloys, and if the sample dis...
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IPC IPC(8): G01N31/16G01N1/44
Inventor 付二红杨春晟蒙益林汪磊
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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