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Metallographic phase corrosive agent suitable for silver-palladium copper alloy, and preparation method and use method thereof

A technology of silver-palladium-copper and etchant, which is applied in the field of silver-palladium alloys, can solve problems such as unfound formulas, and achieve the effects of wide application, good application prospects, and simple operation

Inactive Publication Date: 2015-10-14
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problems of silver-palladium-copper alloy corrosives, relevant personnel have been trying new solutions, but have not yet found a suitable formula, so it is still an urgent problem for relevant professionals to solve

Method used

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  • Metallographic phase corrosive agent suitable for silver-palladium copper alloy, and preparation method and use method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] The preparation of embodiment 1 metallographic etchant

[0019] A kind of silver-palladium-copper alloy metallographic etchant, first 10ml hydrofluoric acid (mass percentage concentration 10%) is placed in plastic container, then add 80ml sulfuric acid (mass percentage concentration 95%~98%), seal preservation, at room temperature Cool and stand for two hours, finally add 10ml of nitric acid (mass percentage concentration 95%-98%), and mix well.

Embodiment 2

[0020] The preparation of embodiment 2 metallographic etchant

[0021] A kind of silver-palladium-copper alloy metallographic etchant, first 10ml hydrofluoric acid (mass percentage concentration 40%) is placed in plastic container, then add 90ml sulfuric acid (mass percentage concentration 95%~98%), seal preservation, at room temperature Cool and stand for two hours, finally add 10ml of nitric acid (mass percentage concentration 95%-98%), and mix well.

Embodiment 3

[0022] The preparation of embodiment 3 metallographic etchant

[0023] A kind of silver-palladium-copper alloy metallographic etchant, first 10ml hydrofluoric acid (mass percentage concentration 40%) is placed in plastic container, then add 80ml sulfuric acid (mass percentage concentration 95%~98%), seal preservation, at room temperature Cool and stand for two hours, finally add 15ml of nitric acid (mass percentage concentration 95%-98%), and mix well.

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Abstract

The invention belongs to the technical field of silver-palladium alloy and particularly relates to a metallographic phase corrosive agent suitable for silver-palladium copper alloy, and a preparation method and a use method thereof. The invention aims to solve the technical problem of providing the metallographic phase corrosive agent by which a precipitated phase in the metallographic phase in a metallographic structure of the silver-palladium copper alloy can be clearly and easily distinguished. In the technical scheme in the invention, the metallographic phase corrosive agent used in silver-palladium copper alloy is composed of following components, by volume, 5-15% of hydrofluoric acid being 40% in mass percentage concentration, 5-15% of nitric acid being 95-98% in mass percentage concentration and 70-90% of sulfuric acid being 95-98% in mass percentage concentration. The invention also provides the preparation method of the metallographic phase corrosive agent and a metallographic structure display method of the silver-palladium copper alloy. The novel metallographic phase corrosive agent allows the precipitated phase in the metallographic phase in the metallographic structure to be clearly and easily distinguished.

Description

technical field [0001] The invention belongs to the technical field of silver-palladium alloys, and in particular relates to a metallographic etchant suitable for silver-palladium-copper alloys and a preparation and use method thereof. Background technique [0002] In the research process of silver-palladium alloy, the difference in material composition and the difference in processing and heat treatment process often lead to different types of metallographic structure, so that the properties of the alloy are also different. Observe the phase structure, and combine the performance test data to adjust the composition, processing technology or heat treatment process of the alloy in time. Generally, the silver-palladium alloy metallographic etchant of silver-palladium alloy is composed of nitric acid, hydrochloric acid, water, etc., and the corrosion of silver-palladium-copper alloy by the above-mentioned silver-palladium alloy metallographic etchant will often form a thin film...

Claims

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Application Information

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IPC IPC(8): C23F1/30G01N1/32
Inventor 王勇程世芳胡建旗程龙龚才华
Owner CHONGQING UNIV
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