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A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel

A low-alloy steel and determination method technology, applied in the field of detection and analysis, can solve the problems of poor color stability, difficulty in joint detection of chromium elements, poor operability, etc., to promote application development and simple determination method , the effect of increased safety

Inactive Publication Date: 2019-03-22
CHENGDU JINJIANG ELECTRONICS SYST ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the existing joint measurement system, there are the following problems: 1: The system with combined determination of aluminum generally adopts the sulfuric acid fuming system. Due to the danger of sulfuric acid and the poor control of the sulfuric acid fuming process, the operability of the process is deteriorated , and it is not easy to achieve joint measurement with chromium
2: In the system with chromium joint measurement, the determination of chromium is basically to use the diphenylcarbazide spectrophotometric method to measure chromium after dissolving the sample. Color stability is not very good

Method used

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  • A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel
  • A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel
  • A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel

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Embodiment 1

[0032] A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel:

[0033] (1) Preparation of test solution: Weigh 0.2 g of low alloy steel sample into a 50.00 ml steel measuring bottle, add 10.0 ml of dissolving solution, heat to dissolve at 60-80°C, heat to 140-200°C to fill the bottle with high Chloric acid white smoke, continue to heat at 210°C until perchloric acid smoke reaches the bottle mouth for 30 seconds, cool down, add water to make up to 50.00 ml, mix well, and get the test solution;

[0034] (2) Determination of chromium: the test solution is at a wavelength of 430 nanometers, with a cuvette of 1 cm, and water is used as a reference solution to measure the absorbance value of chromium;

[0035] (3) Determination of molybdenum: Take 5.00 ml of test solution and place it in a 50.00 ml volumetric flask, add 5.0 ml of sulfuric acid and 10.0 ml of ascorbic acid and mix well, then add 3.00 ml of ammonium thiocyanate, add water to ...

Embodiment 2

[0041] A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel:

[0042] (1) Preparation of test solution: Weigh 0.2 g of low alloy steel sample into a 50.00 ml steel measuring bottle, add 10.0 ml of dissolving solution, heat to dissolve at 60-80°C, heat to 140-200°C to fill the bottle Perchloric acid white smoke, continue to heat at 210°C until the perchloric acid smoke reaches the bottle mouth for 30 seconds, cool down, add water to make up to 50.00 ml, mix well, and get the test solution;

[0043] (2) Determination of chromium: the test solution is at a wavelength of 430 nanometers, with a cuvette of 1 cm, and water is used as a reference solution to measure the absorbance value of chromium;

[0044] (3) Determination of molybdenum: put 5.00 ml of test solution in a 50.00 ml volumetric flask, add 5.0 ml of sulfuric acid and 10.0 ml of ascorbic acid and mix well, then add 3.00 ml of ammonium thiocyanate, add water to make up to 50.00 ...

Embodiment 3

[0050] A joint determination method of chromium molybdenum aluminum titanium content in low alloy steel:

[0051] (1) Preparation of test solution: Weigh 0.2 g of low alloy steel sample into a 50.00 ml steel measuring bottle, add 10.0 ml of dissolving solution, heat to dissolve at 60-80°C, heat to 140-200°C to fill the bottle Perchloric acid white smoke, continue to heat at 210°C until the perchloric acid smoke reaches the bottle mouth for 30 seconds, cool down, add water to make up to 50.00 ml, mix well, and get the test solution;

[0052] (2) Determination of chromium: the test solution is at a wavelength of 430 nanometers, with a cuvette of 1 cm, and water is used as a reference solution to measure the absorbance value of chromium;

[0053] (3) Determination of molybdenum: Take 5.00 ml of test solution and place it in a 50.00 ml volumetric flask, add 5.0 ml of sulfuric acid and 10.0 ml of ascorbic acid and mix well, then add 3.00 ml of ammonium thiocyanate, add water to mak...

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Abstract

The invention relates to the technical field of detection analysis, in particular to a combined determination method for chrome, molybdenum, aluminum and titanium contents in low-alloy steel. The combined determination method comprises the following detection steps: preparing test fluid, determining chrome, determining molybdenum, determining aluminum, determining titanium and determining a sample of each element. The combined determination method provided by the invention has the advantages that mixed solution of nitric acid, perchloric acid and water in a certain mass ratio is taken as a dissolving solution, combined determination of chrome, molybdenum, aluminum and titanium is rapidly and stably realized, the determination method is simple, steady in determination and strong in repeatability, and cost and time of an analysis system are respectively greatly reduced as combined determination of four elements is realized; meanwhile, a reagent with high corrosivity, such as sulphuric acid, is basically not used in a detection process, so that safety of the analysis system is improved, and the combined determination method is significant for promoting application and development of alloy.

Description

technical field [0001] The invention relates to the technical field of detection and analysis, in particular to a combined determination method for the content of chromium, molybdenum, aluminum and titanium in low alloy steel. Background technique [0002] In the prior art, in the technical category of element content determination by using visible spectrophotometry, some technologies involve the combined determination of chromium, molybdenum and titanium in low alloy steel, or the combined measurement system of aluminum, molybdenum and titanium, but there is a shortage of low alloy steel. Joint determination of chromium molybdenum aluminum titanium content in medium. [0003] GB / T223.11-2008 "Visual Titration or Potentiometric Titration" measures the content of chromium in steel and alloys. It can only test steel and alloys with a chromium content of more than 0.1%. When the chromium content is less than 0.1%, the test result will be negative Not ideal, the deviation will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31G01N21/78
CPCG01N21/31G01N21/78
Inventor 唐箎陈慧张晓娟
Owner CHENGDU JINJIANG ELECTRONICS SYST ENG
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