Electrolytic extraction analysis method for precipitated phase in cobalt-based superalloy

CN116818482BActive Publication Date: 2026-07-07CHINA IRON & STEEL RESEARCH INSTITUTE GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA IRON & STEEL RESEARCH INSTITUTE GROUP CO LTD
Filing Date
2023-05-31
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

In existing methods for analyzing precipitates in cobalt-based superalloys, the extraction rate of the γ′ phase is low, and the matrix and precipitates are electrolyzed together, leading to inaccurate analysis.

Method used

Electrolysis is carried out using an aqueous electrolyte consisting of ammonium chloride, citric acid, and glycerol, and an organic electrolyte consisting of LiCl, sulfosalicylic acid, and glycerol. Pre-electrolysis and quantitative electrolysis are combined to control the electrolysis conditions and current density. Capsules are used to prevent contamination by cathode reduction products.

Benefits of technology

It achieves efficient extraction and accurate analysis of the γ′ phase, eliminates sample contamination, reduces the influence of impurities, and provides technical support for optimizing material properties.

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Abstract

The application discloses an electrolytic extraction analysis method of precipitated phases in a cobalt-based high-temperature alloy, and belongs to the technical field of metal material analysis. The method solves the problem that the extraction rate of gamma prime is very low when analyzing the precipitated phases in the cobalt-based high-temperature alloy. The electrolytic extraction analysis method comprises the following steps: electrolyzing by using an aqueous electrolyte which is composed of three components, i.e., ammonium chloride, citric acid and glycerol. In the aqueous electrolyte, the mass concentration of the ammonium chloride is 47-52 g / L, the mass concentration of the citric acid is 17-22 g / L, and the volume concentration of the glycerol is 4-6%. By using the method, the gamma prime phase in the cobalt-based high-temperature alloy can be effectively extracted, and then the accurate analysis of the gamma prime phase can be realized, so as to provide technical support for exploring the influence of the precipitated phase on the material performance and optimizing the material.
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