Method for rapidly determining titanium content of titanium alloy blue corrosion solution

A corrosive solution and rapid measurement technology, applied in the chemical industry, can solve problems such as complex processes, and achieve the effects of short time required, stable method, and simple control conditions.

Inactive Publication Date: 2018-03-16
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used methods for the determination of titanium content include diantipyridine methane photometry, chromotropic acid photometry and hydrogen peroxide photometry, but the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Determination method of titanium content in pre-corrosion solution: its steps:

[0044] (1) Preparation of sample solution: according to the titanium content range in the tank solution, divide 10.00mL of sample solution into a 150mL polytetrafluoroethylene beaker, add sulfuric acid, evaporate to sulfuric acid fumes, remove and transfer to a 50mL volumetric flask, and set Fill to the mark and shake well to get test solution A;

[0045] (2) Prepare blank solution along with it: except that no sample solution is added, all steps are the same as (1);

[0046] (3) Preparation of chromogenic solution: pipette 10.00mL of test solution A, place it in a 50mL volumetric flask, add hydrogen peroxide and sulfuric acid, dilute to the mark with water, and shake well;

[0047] (4) Preparation of reference solution: Pipette the same volume of test solution A as in (3), place it in a 50mL volumetric flask, add ammonium fluoride solution, hydrogen peroxide and sulfuric acid, and dilute ...

Embodiment 2

[0058] The assay method of titanium content in colored solution 1: its steps:

[0059] (1) Preparation of sample solution: According to the titanium content range in the tank solution, divide 5.00mL of sample solution into a 150mL polytetrafluoroethylene beaker, add sulfuric acid, evaporate to sulfuric acid fumes, remove and transfer to a 200mL volumetric flask, and set Fill to the mark and shake well to get test solution A;

[0060] (2) Prepare blank solution along with it: except that no sample solution is added, all steps are the same as (1);

[0061] (3) Preparation of chromogenic solution: pipette 5.00mL of test solution A, place it in a 50mL volumetric flask, add hydrogen peroxide and sulfuric acid, dilute to the mark with water, and shake well;

[0062] (4) Preparation of reference solution: pipette the same volume of test solution A as in (3), place it in a 50mL volumetric flask, add ammonium fluoride solution, hydrogen peroxide and sulfuric acid, dilute to the mark w...

Embodiment 3

[0073] The assay method of titanium content in the colored solution 2: its steps:

[0074] (1) Preparation of sample solution: According to the titanium content range in the tank solution, divide 5.00mL of sample solution into a 150mL polytetrafluoroethylene beaker, add sulfuric acid, evaporate to sulfuric acid fumes, remove and transfer to a 200mL volumetric flask, and set Fill to the mark and shake well to get test solution A;

[0075] (2) Prepare blank solution along with it: except that no sample solution is added, all steps are the same as (1);

[0076] (3) Preparation of chromogenic solution: pipette 5.00mL of test solution A, place it in a 50mL volumetric flask, add hydrogen peroxide and sulfuric acid, dilute to the mark with water, and shake well;

[0077] (4) Preparation of reference solution: pipette the same volume of test solution A as in (3), place it in a 50mL volumetric flask, add ammonium fluoride solution, hydrogen peroxide and sulfuric acid, dilute to the ma...

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PUM

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Abstract

The invention discloses a method for rapidly determining the titanium content of a titanium alloy blue corrosion solution. The method comprises the following steps: removing nitric acid and hydrofluoric acid by sulfuric acid, reacting tetravalent titanium with hydrogen peroxide in a sulfuric acid medium to form a yellow complex, and carrying out absorbance determination, wherein vanadium interference is eliminated by using a fluorine-containing medium as a reference. Compared with other analysis methods, the method based on hydrogen peroxide spectrophotometry has the advantages of simple control condition requirements, short time, rapid completion of analysis under basic conditions without placement, low sensitivity, realization of the determination of titanium with a wide content range when applied to bath solution analysis, and stability.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for quickly measuring the titanium content in a titanium alloy blue corrosion solution. Background technique [0002] Compared with steel, titanium alloys widely used in the aviation field are more sensitive to surface defects and stress concentration, especially titanium alloys with higher strength. In order to improve the reliability of titanium alloy parts during use, corrosion inspection must be carried out. [0003] The blue corrosion inspection process, referred to as blue corrosion, is a non-destructive inspection method for inspecting the defects generated on the surface of titanium alloy parts in the process of smelting, forging and machining. It can inspect the surface of excessive machining, as well as parts on forgings and castings. Surface defects. [0004] The principle is to anodize titanium alloy parts to form a layer of oxide film on the surface of the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 刘朝于梅刘红霞李骏涛郭子静岳航孙岳屏赵勇
Owner AECC AVIATION POWER CO LTD
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