Method for measuring content of aluminium in zinc-aluminium alloy

A zinc-aluminum alloy and determination method technology, which is applied in chemical analysis by titration, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the risk and quality of large purchases Control risks and other issues to achieve good results, good repeatability and stability, and reliable and accurate data

Inactive Publication Date: 2019-09-10
XINXING DUCTILE IRON PIPES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no test method for the determination of zinc and aluminum in China, and the user unit judges whether it is qualified based on the ingredient list provided by the supplier and the actual use effect, and there is a large procurement risk and quality control risk

Method used

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Embodiment

[0018] The assay method of the aluminum content in the zinc-aluminum alloy that the present invention proposes comprises the following assay steps:

[0019] S1, weigh 0.5000g sample into a 250ml beaker, add 20ml of concentrated hydrochloric acid, heat at low temperature until the sample is completely dissolved, add 2ml of nitric acid to drive away nitrogen oxides, add 50ml of water, rinse the wall of the beaker with water, and set the volume to 250ml inside the volumetric flask;

[0020] S2, extract 10ml of mother liquor into a 250ml Erlenmeyer flask, add 40ml of water, add 35ml of EDTA solution, add 10ml of acetic acid-sodium acetate buffer solution, boil on an electric stove for 5-7min, add 6-8 drops of xylenol orange indicator while hot , Titrate to orange-red with zinc standard solution, do not measure, add 10ml of NaF solution, boil for 5min while hot, titrate to orange-red with zinc standard solution, record the volume V;

[0021] S3, calculation formula: ω(Al)%=CZn + ...

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PUM

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Abstract

The invention discloses a method for measuring content of aluminium in zinc-aluminium alloy, and belongs to the field of measurement on the content of the aluminium in the zinc-aluminium alloy. Now, the following scheme is disclosed: the method comprises the following measurement steps of: S1, weighing 0.5000g of test sample to place into a 250ml beaker, expelling nitric oxide, adding 50ml of water, purging the beaker wall with the water, and fixing a volume in a 250ml volumetric flask; S2, extracting 10ml of mother solution into a 250ml triangular flask, adding 40ml of water, adding 35ml of EDTA solution, titrating into orange red with zinc standard solution without measuring, adding 10ml of NaF solution, boiling for 5min, titrating into orange red with the zinc standard solution in a hotstate and recording a volume V; and S3, calculating according to a formula that: omega (Al)%=CZn+*26.9815*V*100 / m*10 / 250. According to the invention, the method is adopted to test a zinc-aluminium alloy wire, wherein aluminium content test data is good in both repeatability and stability.

Description

technical field [0001] The invention relates to the technical field of determination of aluminum content in zinc-aluminum alloys, in particular to a determination method of aluminum content in zinc-aluminum alloys. Background technique [0002] Zinc-aluminum alloy, as a new alloy with high aluminum and zinc content, is currently widely used in the cast pipe industry. At present, there is no test method for the determination of zinc and aluminum in China, and the user unit judges whether it is qualified based on the ingredient list provided by the supplier and the actual use effect, and there is a large procurement risk and quality control risk. [0003] For this reason, the present invention proposes the determination method of aluminum content in zinc-aluminum alloy. Contents of the invention [0004] The purpose of the present invention is to solve the shortcomings in the prior art and propose a method for determining the aluminum content in zinc-aluminum alloys. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N31/16
CPCG01N21/78G01N31/16
Inventor 李冬梅郭强
Owner XINXING DUCTILE IRON PIPES CO LTD
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