Method of extracting precipitate and/or inclusion, method of quantitative analysis of precipitate and/or inclusion, electrolyte, and method of producing replica sample

Patent metadata

Field	Value
Publication number	US-2023003624-A1
Application number	US-202017779664-A
Country	US
Kind code	A1
Filing date	Nov 18, 2020
Priority date	Nov 25, 2019
Publication date	Jan 5, 2023
Grant date	—

Abstract

A precipitate and/or an inclusion in a metal material is extracted by electrolysis using an electrolyte solution. The electrolyte solution contains an adsorbent that is adsorbed to a surface of the precipitate and/or a surface of the inclusion. The extracted precipitate and/or the inclusion can be quantitatively analyzed with high accuracy.

First claim

1 - 15 . (canceled)

16 . A method of extracting a precipitate and/or an inclusion, comprising extracting the precipitate and/or the inclusion in a metal material by electrolysis using an electrolyte solution,
wherein the electrolyte solution contains an adsorbent that is adsorbed to a surface of the precipitate and/or a surface of the inclusion.

17 . The method according to claim 16 , wherein the adsorbent is adsorbed to a surface of a matrix metal of the metal material.

18 . The method according to claim 16 , wherein the electrolyte solution contains an agent that forms a complex with a matrix metal of the metal material.

19 . The method according to claim 16 , wherein the adsorbent is a compound having at least one group selected from the group consisting of a thiol group, a sulfide group, and a disulfide group.

20 . The method according to claim 16 , wherein a content of the adsorbent in the electrolyte solution is 0.1 g/L or more with respect to a base electrolyte solution containing an electrolyte and a solvent.

21 . The method according to claim 16 , wherein the metal material is a steel material.

22 . A method of quantitative analysis of a precipitate and/or an inclusion, comprising quantitatively analyzing the precipitate and/or the inclusion extracted by the method according to claim 16 .

23 . An electrolyte solution that extracts a precipitate and/or an inclusion in a metal material by electrolysis, the electrolyte solution comprising an adsorbent that is adsorbed to a surface of the precipitate and/or a surface of the inclusion.

24 . The electrolyte solution according to claim 23 , wherein the adsorbent is adsorbed to a surface of a matrix metal of the metal material.

25 . The electrolyte solution according to claim 23 , further comprising an agent that forms a complex with a matrix metal of the metal material.

26 . The electrolyte solution according to claim 23 , wherein the adsorbent is a compound having at least one group selected from the group consisting of a thiol group, a sulfide group, and a disulfide group.

27 . The electrolyte solution according to claim 23 , wherein a content of the adsorbent is 0.1 g/L or more with respect to a base electrolyte solution containing an electrolyte and a solvent.

28 . The electrolyte solution according to claim 23 , wherein the metal material is a steel material.

29 . A method of preparing a replica sample comprising:
subjecting a surface of a metal material to an electro etching using the electrolyte solution according to claim 23 ; and transferring a precipitate and/or an inclusion present on the surface of the metal material after the electro etching to a conductive thin film.

30 . The method according to claim 29 , wherein the conductive thin film is a carbon vapor deposition film.

Assignees

• Jfe Steel Corp

Inventors

• Sugawara Seiya
• SAEKI Michitoshi
• Watanabe Manabu

Classifications

• G01N1/4055 Primary

  by solubility techniques · CPC title

• G01N2001/4088

  filtration · CPC title

• G01N33/2028 Primary

  Metallic constituents · CPC title

• G01N1/2806

  Means for preparing replicas of specimens, e.g. for microscopal analysis · CPC title

• G01N2001/4061

  Solvent extraction · CPC title