Method for extracting metal compound particles, method for analyzing metal compound particles, and electrolyte solution used in said methods

一种金属化合物、提取方法的技术，应用在金属化合物粒子的提取、该金属化合物粒子的分析以及在这些中使用的电解液领域

Active Publication Date: 2018-06-08
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Therefore, regarding the electrolytic solution for the purpose of identification-quantitative analysis of inclusions and precipitated phase residue recovery, the main focus is on maintaining the dissolved state of the Fe component in the electrolytic solution in the form of a chelate, while regarding the electrolytic solution Inclusions and contamination of precipitated phases, etc., are not given special consideration

Method used

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  • Method for extracting metal compound particles, method for analyzing metal compound particles, and electrolyte solution used in said methods
  • Method for extracting metal compound particles, method for analyzing metal compound particles, and electrolyte solution used in said methods
  • Method for extracting metal compound particles, method for analyzing metal compound particles, and electrolyte solution used in said methods

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Embodiment 1

[0156] The present invention will be described below through examples. However, the present invention should not be limited to the following examples and interpreted.

[0157] The inclusions or precipitated phases in the iron and steel samples were observed by using the electrolyte solution and the electrolysis method of the present invention. As a comparative example, a sulfide-based inclusion containing 4% by mass of methyl salicylate + 1% by mass of salicylic acid + 1% by mass of tetramethylammonium chloride (TMAC) that has been known to recover sulfide-based inclusions as a residue was used. ) of the conventional electrolyte solution (4% MS), using the comparative example of electrolysis, the inclusions or precipitated phases of the same iron and steel samples were observed. As the electrolytic solution of the present invention, an electrolytic solution (5% TETA) of 5% by volume of triethylenetetramine (TETA) + 1% by mass of tetramethylammonium chloride (TMAC) was used. ...

Embodiment 2

[0169] Quantitative analysis of inclusions or precipitates in steel samples was performed by electrolysis using the electrolytic solution of the present invention. As a comparative example, a comparative example in which electrolysis was performed using a conventional electrolytic solution was prepared.

[0170] In this example, as a steel sample, a steel material containing 0.4% by mass of Cu was heat-treated at 1350° C. for 30 min for solid solution, and then rapidly cooled in water.

[0171] The following three types of electrolyte solutions were prepared.

[0172] (1) 4% MS: 4% by mass of methyl salicylate + 1% by mass of salicylic acid + 1% by mass of tetramethylammonium chloride, which has been known to recover sulfide-based inclusions as residues (TMAC) as a control example.

[0173] (2) 4% MS+5% TETA: 5% by volume of triethylenetetramine (TETA), which forms a complex with Cu ions, was added to the 4% MS of (1).

[0174] (3) 5% TETA: an electrolytic solution of triet...

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Abstract

The present invention addresses the problem, in the extraction and analysis of metal fine particles (inclusions, precipitate) in a metal material by means of electrolytic etching using a solvent electrolyte solution, of suppressing surface substitution of the metal fine particles by Cu ions and the like and preventing the generation of artifact CuS and the like without significantly changing conventional extraction / analysis methods. Provided are: a method for extracting metal compound particles in a metal material by etching the metal material in an electrolyte solution, said method using an electrolyte solution that comprises an agent that forms a complex that includes a metal M' wherein if the solubility product of a metal compound M'x'Ay' is defined as Ksp[M'x'Ay'] and the solubility product of a metal compound MxAy to be extracted which is included in the metal material is defined as Ksp[MxAy], delta as defined in the belowmentioned formula is 10 or more; and said electrolyte solution. delta = pKsp[M'x'Ay']-pKsp[MxAy] = (-log10Ksp[M'x'Ay'])-(-log10Ksp[MxAy])

Description

technical field [0001] The present invention relates to a method for extracting metal compound particles in the metal material by eroding the metal material in the electrolyte solution, a method for analyzing the metal compound particles, and an electrolyte solution thereof, wherein the electrolyte solution Contains agents for trapping specific metals. Background technique [0002] In metal materials, especially iron and steel materials, it is widely implemented to control the types of inclusions and precipitates in the material matrix, the shape and size of the aspect ratio, etc., by adding trace elements and various heat treatments. The required strength and properties of the material are controlled. [0003] Therefore, the observation of inclusions and / or precipitates, and the determination of their composition and content are of great significance in the quality management of steel materials and the analysis of manufacturing processes. [0004] In order to observe incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32C25F5/00G01N33/20
CPCG01N1/32C25F3/02C25F3/06G01N33/2028C25F5/00C09K13/00G01N33/202
Inventor 水上和实
Owner NIPPON STEEL CORP
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