Method for detecting content of aluminium and aluminium alloy oxide inclusions

A detection method and technology of aluminum alloy, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of long analysis period, cumbersome procedures, and various reagents, and achieve the effect of easy implementation, simple method and short period.

Inactive Publication Date: 2012-05-30
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, even if the best quality crucible is selected, it is difficult to be accurate to one thousandth when the crucible is constant.
Obviously, if it is necessary to detect samples whose content of aluminum and aluminum alloy oxide inclusions is less than one thousandth, the gravimetric method cannot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for detecting the content of oxidized inclusions in aluminum and aluminum alloys, the detection steps of which are: (1), cutting aluminum flakes from aluminum ingots, processing them into thin strip-shaped samples, cleaning them with absolute ethanol and then with absolute methanol Clean, place it in a desiccator for 5 minutes to dry; (2), weigh 1±0.01g of the sample, put it into a beaker filled with 60ml of methanol, add 2ml of bromine for the first time, and keep shaking during the process of adding bromine Beaker, keep the temperature at 20°C, react for 60 minutes; (3), add bromine 1ml for the second time, react at 20°C for 15 minutes, add bromine 3ml for the third time, react at 30°C for 35 minutes, and then React at 30°C until the sample dissolves; (4), filter the solution with filter paper, discard the filtrate, and wash the filter paper with methanol until there is no bromine; (5), place the filter paper with the precipitate in a platinum crucible, Start...

Embodiment 2

[0021] A method for detecting the content of oxidized inclusions in aluminum and aluminum alloys, the detection steps of which are: (1), cutting aluminum flakes from aluminum ingots, processing them into thin strip-shaped samples, cleaning them with absolute ethanol and then with absolute methanol Clean, put it in a desiccator for 10 minutes to dry; (2), weigh 1±0.001g of the sample, put it into a beaker filled with 70ml of methanol, add 3ml of bromine for the first time, and keep shaking during the process of adding bromine Keep the temperature in the beaker at 30°C, and react for 50 minutes; (3), add 1.5ml of bromine for the second time, clean it at 30°C, and place it in a desiccator for 20 minutes to dry it; (2), weigh 1 Put ±0.001g of the sample into a beaker containing 90ml of methanol, add 5ml of bromine for the first time, shake the beaker constantly during the process of adding bromine, keep the temperature at 35°C, and react for 45 minutes; (3), Add for the second time...

Embodiment 5

[0023] A method for detecting the content of oxidized inclusions in aluminum and aluminum alloys, the detection steps of which are: (1), cutting aluminum flakes from aluminum alloy ingots, processing them into thin strip-shaped samples, first using absolute ethanol and then using anhydrous methanol Clean it up and let it dry in cold wind; (2), weigh 1 ± 0.0001g of the sample, put it into a beaker with 100ml of methanol, add 3ml of bromine for the first time, shake the beaker constantly during the process of adding bromine, and keep The temperature is 30°C, react for 50 minutes; (3), add 3ml of bromine for the second time, react for 30 minutes at 30°C, add 1ml of bromine for the third time, react for 40 minutes at 25°C, and then react at 40°C Lower the reaction until the sample dissolves; (4), filter the solution with filter paper, discard the filtrate, wash the filter paper with methanol until no bromine is detected with silver atoms; (5), place the filter paper with the precip...

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Abstract

The invention discloses a method for detecting the content of aluminium and aluminium alloy oxide inclusions, comprising the following steps: (1) first, cutting a sample material of aluminum sheets, washing the sample material with absolute ethyl alcohol and absolute methanol, and drying; (2) weighing 1+/- 0.0001 g sample material, putting the sample material in a beaker containing 60-100 ml of methanol, adding 2-5 ml bromine in the beaker to react for 30-60 min at a temperature of 20-50 DEG C; (3) then adding 1-3 ml of bromine to react for 15-50 min at a temperature of 20-50 DEG C, and then adding 1-3 ml of bromine again to react for 15-50 min at a temperature of 20-50 DEG C, then reacting at a temperature of 30-60 DEG C until the sample material dissolves completely; (4) filtering the solution with filter paper, removing the filtrate, cleaning the filter paper with methanol until no bromine remains; (5) putting the filter paper having precipitations in a crucible, ashing from a low temperature, heating up to 600-900 DEG C and keeping warm for 20-60 min and then taking out, cooling, adding 1-3 g of alkali, and fusing at a temperature of 550-800 DEG C, taking out and adding hot water in the beaker, adding hydrochloric acid while shaking the beaker, pouring the liquid of the beaker in a 100 ml volumetric flask, and bringing to volume by water; and (6) respectively taking 10 ml of the solution out from the 100 ml volumetric flask, bringing to volume by water, then comparing by using a standard curve obtained by atomic absorption, and then determining the content of the aluminium and aluminium alloy oxide inclusions.

Description

1. Technical field [0001] The invention belongs to the field of non-ferrous metal content detection, in particular to a detection and analysis method for measuring the content of oxidized inclusions in aluminum and aluminum alloys. 2. Background technology [0002] Traditional chemical analysis methods to detect and analyze the content of oxidized inclusions in aluminum or aluminum alloys are mainly determined by the bromine-methanol method. The method is: at a certain temperature, dissolve the sample in bromine-methanol solution, aluminum and other alloy elements will form bromide and dissolve in methanol, while oxides such as silicon and alumina are insoluble, filter and separate and fully wash Finally, the residue and filter paper are dried together, ashed and weighed, and the amount of silicon and the weight of filter paper are deducted to obtain the content of oxidized inclusions. In fact, even if the best quality crucible is selected, it is difficult to be accurate to...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 赵斌南敬叶灵熊自强
Owner SNTO TECH GRP
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