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Method for combinedly determining contents of chromium, nickel and titanium in high-chromium nickel stainless steel

A stainless steel, high-chromium-nickel technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of long time period of the measurement system, poor accuracy of measurement results, poor measurement safety, etc., and achieve shortened measurement cycle, high accuracy, and high safety. Effect

Inactive Publication Date: 2013-07-10
CHENGDU JINJIANG ELECTRONICS SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiencies in the determination methods of the three elements of chromium, nickel and titanium in the existing high-chromium-nickel stainless steel, provide a new joint determination method of the three elements of chromium, nickel and titanium, and overcome the limitations of the traditional determination methods. Disadvantages such as poor accuracy, poor repeatability, long measurement system time period, high measurement cost and poor measurement safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] [embodiment 1] the content joint determination method of chromium, nickel and titanium in high-chromium-nickel stainless steel, it may further comprise the steps:

[0013] (1) Preparation of solution: Take a high-chromium-nickel stainless steel sample and weigh it in a steel measuring bottle with a capacity of 250ml, add 10ml of aqua regia to the steel measuring bottle to dissolve the high-chromium-nickel stainless steel, then add 5ml of perchloric acid, the solution smokes After cooling to room temperature, add water to dilute to 250ml to obtain a solution.

[0014] (2) Determination of chromium content: by measuring the absorbance value of chromium in the solution, the content of chromium in high-chromium-nickel stainless steel can be determined;

[0015] (3) Determination of nickel content: Take 3ml from the solution and place it in a 100ml volumetric flask, add 5ml of 15% sodium potassium tartrate prepared with 10% sodium hydroxide solution as a masking agent, add 5...

Embodiment 2

[0017] [embodiment 2] the content joint determination method of chromium, nickel and titanium in high-chromium-nickel stainless steel, it may further comprise the steps:

[0018] (1) Preparation of solution: Take a high-chromium-nickel stainless steel sample and weigh it in a steel measuring bottle with a capacity of 250ml, add 10ml of aqua regia to the steel measuring bottle to dissolve the high-chromium-nickel stainless steel, then add 10ml of perchloric acid, the solution smokes After cooling to room temperature, add water to dilute to 250ml to obtain a solution.

[0019] (2) Determination of chromium content: by measuring the absorbance value of chromium in the solution, the content of chromium in high-chromium-nickel stainless steel can be determined;

[0020] (3) Determination of nickel content: Take 5ml from the solution and place it in a 100ml volumetric flask, add 5ml of 15% potassium sodium tartrate prepared with 10% sodium hydroxide solution as a masking agent, add ...

Embodiment 3

[0022] [embodiment 3] the content joint determination method of chromium, nickel and titanium in high-chromium-nickel stainless steel, it may further comprise the steps:

[0023] (1) Preparation of solution: Take a high-chromium-nickel stainless steel sample and weigh it in a steel measuring bottle with a capacity of 250ml, add 10ml of aqua regia to the steel measuring bottle to dissolve the high-chromium-nickel stainless steel, then add 8ml of perchloric acid, the solution smokes After cooling to room temperature, add water to dilute to 250ml to obtain a solution.

[0024] (2) Determination of chromium content: by measuring the absorbance value of chromium in the solution, the content of chromium in high-chromium-nickel stainless steel can be determined;

[0025] (3) Determination of nickel content: Take 5ml from the solution and place it in a 100ml volumetric flask, add 5ml of 15% potassium sodium tartrate prepared with 10% sodium hydroxide solution as a masking agent, add 5...

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Abstract

The invention discloses a method for combinedly determining contents of chromium, nickel and titanium in high-chromium nickel stainless steel. The method comprises the following steps of: (1) preparing a solution, placing stainless steel in a bottle, adding chloroazotic acid into the bottle to dissolve the stainless steel, adding perchloric acid, smoking, cooling, and diluting into constant volume to obtain the solution; (2) determining the content of the chromium: determining the absorbance value of chromium; (3) determining the content of the nickel: placing the partial solution into a volumetric flask, adding a potassium sodium tartrate masking agent, ammonium persulfate and dimethylglyoxime sequentially for color development, and determining the absorbance value of nickel; and (4) determining the content of the titanium: placing one part of solution into the volumetric flask, adding ascorbic acid and chromotropic acid in certain concentration for color development, and determiningthe absorbance value of the titanium in the reference of titanium free stainless steel. The method has the advantages of: high accuracy, high repeatability, short determination system time, low determination cost and the like.

Description

technical field [0001] The invention relates to a method for jointly determining the contents of chromium, nickel and titanium in high-chromium-nickel stainless steel. Background technique [0002] High-chromium-nickel stainless steel is a commonly used metal material in radar products. Its anti-corrosion performance directly affects the performance and life of radar products. Among them, the content of chromium, nickel and titanium plays a key role in anti-corrosion performance. Therefore, accurate, It is very important to quickly determine the contents of chromium, nickel and titanium in high-chromium-nickel stainless steel! However, most of the traditional determination methods for the content of chromium, nickel and titanium in high-chromium-nickel stainless steel can only measure the three elements of chromium, nickel and titanium separately, and there are also some methods for the joint measurement of the three elements of chromium, nickel and titanium, but the traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 唐篪黄锦英陈慧
Owner CHENGDU JINJIANG ELECTRONICS SYST ENG
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