Chemical analysis method for determination of zirconium content in alloy containing various interference elements

A technology for interfering elements and zirconium content, applied in the direction of chemical analysis by titration, etc., can solve the problems of restricting the engineering process, influence, and limitation of measurement methods

Inactive Publication Date: 2014-03-05
CHINA WEAPON SCI ACADEMY NINGBO BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above-mentioned prior art does not disclose a method for measuring the content of zirconium in bifunctional alloys, especially for through-combustion. Due to different raw materials, the interfering elements involved are also different, which will have great restrictions and influence on the...

Method used

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  • Chemical analysis method for determination of zirconium content in alloy containing various interference elements
  • Chemical analysis method for determination of zirconium content in alloy containing various interference elements
  • Chemical analysis method for determination of zirconium content in alloy containing various interference elements

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1: Weigh 0.2g sample and place it in a platinum dish, add 2ml of nitric acid and slowly add hydrofluoric acid until the sample does not react; continue to add hydrofluoric acid, heat to dissolve, add 10ml of sulfuric acid, heat at low temperature until sulfuric acid fumes 3min; remove and cool slightly, rinse the dish wall with water, reheat to smoke, and cool down; wash the platinum dish with 200g / L sodium hydroxide; filter with medium-speed filter paper, wash with 10g / L sodium hydroxide; Dissolve the precipitate after washing in the previous step into a volumetric flask; take 10 ml of the pilot solution in the previous step, use xylenol orange as an indicator, and titrate with EDTA standard solution. Boil the solution again, if red appears in the solution, continue to titrate to yellow until the yellow color of the solution after boiling remains unchanged as the end point, and the mass fraction of zirconium obtained according to the formula is 45.54%, and the a...

Embodiment 2

[0049] Example 2: Weigh 0.2g sample and place it in a platinum dish, add 2ml of nitric acid and slowly add hydrofluoric acid until the sample does not react; continue to add hydrofluoric acid, heat to dissolve, add 10ml of sulfuric acid, heat at low temperature until sulfuric acid fumes 5min; remove and cool slightly, rinse the dish wall with water, reheat to smoke, and cool down; wash the platinum dish with 200g / L sodium hydroxide; filter with medium-speed filter paper, wash with 10g / L sodium hydroxide; Dissolve the precipitate after washing in the previous step into a volumetric flask; pipette 10 ml of the pilot solution in the previous step, use xylenol orange as an indicator, and titrate with EDTA standard solution. Boil the solution again, if red appears in the solution, continue to titrate to yellow until the yellow color of the solution remains unchanged as the end point after boiling, and the mass fraction of zirconium obtained according to the formula is 53.60%, and th...

Embodiment 3

[0050] Example 3: Weigh 0.2g sample and place it in a platinum dish, add 2ml of nitric acid and slowly add hydrofluoric acid until the sample does not react; continue to add hydrofluoric acid, heat to dissolve, add 10ml of sulfuric acid, heat at low temperature until sulfuric acid fumes 10min; remove and cool slightly, wash the dish wall with water, reheat to smoke, and cool down; wash the platinum dish with 200g / L sodium hydroxide; filter with medium-speed filter paper, wash with 10g / L sodium hydroxide; Dissolve the precipitate after washing in the previous step into a volumetric flask; pipette 10 ml of the pilot solution in the previous step, use xylenol orange as an indicator, and titrate with EDTA standard solution. Boil the solution again, if red appears in the solution, continue to titrate to yellow until the yellow color of the solution after boiling remains unchanged as the end point, and the mass fraction of zirconium obtained according to the formula is 55.50%, and th...

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Abstract

The invention discloses a chemical analysis method for the determination of the zirconium content in an alloy containing various interference elements. The chemical analysis method is characterized by comprising the following steps: adding a nitric acid, a hydrofluoric acid and a sulfuric acid into a platinum dish to dissolve an alloy specimen, and separating interference elements by using sodium hydroxide; titrating zirconium in precipitations by using EDTA (ethylene diamine tetraacetic acid) by taking xylenol orange as an indicator in a hydrochloric acid medium with a hydrogen ion molar concentration of 1.25 moles per liter at a temperature of 90-100 DEG C. The method disclosed by the invention has the advantages that the method is especially applicable to the determination of the zirconium content of a drilling-burning double-function alloy, the determination results are accurate, and the determination process is convenient.

Description

technical field [0001] The invention relates to a method for measuring metal content, in particular to a method for measuring zirconium content in alloys. Background technique [0002] The dual-function piercing and burning alloy is a new type of high-efficiency damage material independently developed by my country with independent intellectual property rights. It is a new type of warhead material that integrates penetration, explosion and combustion. Direct and anti-munition systems. [0003] Combustion-piercing dual-functional alloy is an alloy containing a variety of interfering elements (zirconium, tungsten, rare earth, titanium), and the content of each component directly affects the technical combat level of the material such as armor-piercing, explosion, and combustion. Therefore, the accurate determination of the chemical composition of the bifunctional alloy is an urgent need to improve the performance index of the material and conduct related research. [0004] Th...

Claims

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Application Information

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IPC IPC(8): G01N31/16
Inventor 马兰徐向群郑颖覃广河贾建平余琼徐炜刘子瑜
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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