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Determination method for content of silicon in high strength aluminum welding wire

A measurement method, the technology of aluminum welding wire, applied in the field of analysis and testing, can solve the problems of inapplicability to pre-furnace analysis and mass product testing, long test process, and high technical level requirements for testing personnel, etc., with short time to achieve and few reagent methods , time-saving effect

Inactive Publication Date: 2013-09-25
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The determination of silicon 1.00-7.00 in the production of high-strength aluminum welding wire is determined by gravimetric method, which requires many types of reagents and multiple constant weights. The test process is long. Every step of the test is very important, and a slight mistake will affect the authenticity of the final test result. High requirements on the technical level of testing personnel
Although the gravimetric method is a classic detection method, it is obviously not suitable for furnace analysis and mass product detection

Method used

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  • Determination method for content of silicon in high strength aluminum welding wire
  • Determination method for content of silicon in high strength aluminum welding wire
  • Determination method for content of silicon in high strength aluminum welding wire

Examples

Experimental program
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Effect test

Embodiment 1

[0070] 1. Accurately weigh 0.2000g of high-strength aluminum welding wire sample into a 100mL silver beaker, add a small amount of water (2mL) and 5g of sodium hydroxide, add 10mL of water after a violent reaction, heat until the sample is completely dissolved, and cool. Wash the silver watch glass and cup wall with water, transfer the sample solution into a beaker filled with 50ml nitric acid (1+1) under stirring; heat the sample solution in the beaker to boil, drive off nitrogen oxides, and cool. Transfer to a 250mL volumetric flask, dilute to the mark, and shake well.

[0071] 2. Dispense 5.00mL of the above solution into a 100mL colorimetric tube, add 1mL of nitric acid (1+1), add 5.00mL of ammonium molybdate solution, the mass concentration of ammonium molybdate solution is 5%, boil in a water bath for 30s, and cool in running water. Add 40 mL of sulfuric acid-ammonium oxalate solution, 10 mL of 6% ferrous ammonium sulfate solution, dilute to the mark with deionized water...

Embodiment 2

[0092] 1. Accurately weigh 0.2000g of a high-strength aluminum welding wire sample into a 100mL silver beaker, add a small amount of water (2ml) and 5g of sodium hydroxide, add 10mL of water after a violent reaction, heat until the sample is completely dissolved, and cool. Wash the silver watch glass and cup wall with water, transfer the sample solution into a beaker filled with 50ml nitric acid (1+1) under stirring; heat the sample solution in the beaker to boil, drive off nitrogen oxides, and cool. Transfer to a 250mL volumetric flask, dilute to the mark, and shake well.

[0093] Add 40 mL of sulfuric acid-ammonium oxalate solution, 10 mL of ferrous ammonium sulfate solution, dilute to the mark with deionized water, shake well and measure.

[0094] 2. Dispense 5.00mL of the above solution into a 100mL colorimetric tube, add 1mL of (1+1) nitric acid, add 5.00mL of ammonium molybdate solution, the mass concentration of ammonium molybdate solution is 5%, boil in water bath for ...

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Abstract

The invention relates to a determination method for the content of silicon in a high strength aluminum welding wire. The content of silicon in the high strength aluminum welding wire is determined by a spectrophotometric method. The determination method comprises the following steps: (1) sampling; (2) adding water and sodium hydroxide, heating until the sample is completely and clearly dissolved, and cooling; (3) acidizing; (4) heating to boil, removing nitrogen oxides, cooling, and diluting; (5) dividing the sample solution into colorimetric tubes, adding nitric acid and ammonium molybdate solution, and performing water bath; (6) cooling by running water, adding sulfuric acid-ammonium oxalate solution and ferrous ammonium sulphate solution, diluting with water to the mark, and shaking uniformly; (7) preparing a reagent blank along with the experiment; and (8) drawing a standard curve; determining an absorbance, and calculating a numerical value by the standard curve. A spectrophotometer is used for successfully determining the mass content of silicon in the high strength aluminum welding wire, a determining range of the mass content is 1.00% to 7.00%, and the accuracy is comparable to that of a gravimetric measurement method. The method saves a lot of analysis time and also increases silicon measurement method types.

Description

technical field [0001] The invention relates to a method for measuring silicon content in high-strength aluminum welding wire, in particular to a method for measuring silicon content in high-strength aluminum welding wire by using molybdenum blue spectrophotometry. The invention uses a spectrophotometer to measure silicon content in high-strength aluminum welding wire, and belongs to the technical field of analysis and testing. Background technique [0002] High-strength aluminum welding wire is mainly used in the welding of launch vehicles, satellite shells and other aspects. Every step of the high-strength aluminum welding wire from entering the factory, smelting, to the qualitative completion of the product is closely related to testing. According to the national standard GB / T 20975.5-2008 "Methods for Chemical Analysis of Aluminum and Aluminum Alloys Part 5: Determination of Silicon Content", the measurement range is 0.0010% to 0.40% using spectrophotometry, and the mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/28
Inventor 郅富国栗丞君延凤泊张娟郭飞
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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