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Method for measuring iron and nickel contents in cobalt-base alloy welding wire by flame atomic absorption method

A flame atomic absorption, cobalt-based alloy technology, applied in the measurement of color/spectral properties, etc., can solve problems such as interference, difficulty in ensuring the accuracy and precision of analysis results, and achieve the effect of improving accuracy and precision

Inactive Publication Date: 2009-04-15
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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AI Technical Summary

Problems solved by technology

Because the chemical analysis method is used to measure, because a large amount of cobalt in the matrix seriously interferes with the determination of iron and nickel, it is difficult to ensure the accuracy and precision of the analysis results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Take cobalt-based alloy welding wire S111 as an example.

[0023] 1. Sampling:

[0024] To solve the problem that the welding wire has a small diameter (φ4.0mm) and cannot be directly drilled, the method of surfacing welding is adopted, that is, several welding wires are melted and solidified into a certain thickness and width in a container, and then drilled for test samples.

[0025] 2. Glassware:

[0026] A quartz beaker is used to dissolve the sample to eliminate the phenomenon that the determination result of iron is too high due to the addition of hydrofluoric acid when the GG17 beaker is used to dissolve the sample.

[0027] 3. Measurement method:

[0028] Accurately weigh 0.2000g of the test sample into a 150mL conical quartz beaker, add 10mL salt nitric acid mixed acid (a mixture of 5 times the volume of concentrated nitric acid and 1 times the volume of concentrated hydrochloric acid), 10 drops of hydrofluoric acid, heat to dissolve, and then add 5mL perchl...

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Abstract

The invention relates to a method for determining the content of iron and nickel, in particular to a method for determining the content of iron and nickel in a cobalt base alloy welding wire by using a flame atomic absorption method. The method for determining the content of the iron and the nickel in the cobalt base alloy welding wire by using the flame atomic absorption method comprises the following steps: sampling, accurately weighing the welding wire sample, dissolving the sample with acid, diluting with hydrochloric acid to obtain concentration of absorbance which can be measured by using an atomic absorption spectrometer, preparing series of standard solution curve and measuring the absorbance of the solution by using air-acetylene flame. As the technical proposal is adopted, the rapid and effective method for determining the content of the iron and the nickel in the cobalt base alloy welding wire by using the flame atomic absorption method is established, and the accuracy and the precision of the analytic result are enhanced.

Description

technical field [0001] The invention relates to the determination of iron and nickel content, in particular to the determination of iron and nickel content of cobalt-based alloy welding wire by flame atomic absorption method. Background technique [0002] So far, the contents of iron and nickel elements in cobalt-based alloy welding wire materials are mainly analyzed by spark direct reading spectrometer, plasma atomic emission spectrometer and other instruments. Because the chemical analysis method is used for the determination, since a large amount of cobalt in the matrix seriously interferes with the determination of iron and nickel, it is difficult to ensure the accuracy and precision of the analysis results. Contents of the invention [0003] The purpose of the present invention is to provide a fast and effective method for joint determination of iron and nickel content in cobalt-based alloy welding wire and welding wire by flame atomic absorption method. [0004] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 李虹
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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