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Super-pure aluminum microscopic tissue form etching agent and etching method thereof

A microstructure and etchant technology, applied in the field of ultra-pure aluminum microstructure etchant and erosion, can solve the problems of difficult to control the erosion process, difficult to distinguish the original pores, etc., and achieve simple reagents and high conductivity. Effect

Active Publication Date: 2018-07-03
囯网河北省电力有限公司电力科学研究院 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the problems that the existing erosion process is not easy to control, it is easy to erode the second phase particles in the structure, and it is difficult to distinguish from the original pores in the structure, etc., the present invention provides an etchant for ultra-pure aluminum microstructure

Method used

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  • Super-pure aluminum microscopic tissue form etching agent and etching method thereof
  • Super-pure aluminum microscopic tissue form etching agent and etching method thereof
  • Super-pure aluminum microscopic tissue form etching agent and etching method thereof

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Embodiment 1

[0037] This embodiment provides a method for etching ultrapure aluminum microstructure morphology, and the etching method includes the following steps:

[0038] Step 1. According to the needs of the research, select the cross-section and longitudinal section of the duralumin wire as the inspection surface for microstructure observation;

[0039] Step 2. Grinding the duralumin wire step by step on 80 mesh, 180 mesh, 280 mesh, 400 mesh, 600 mesh, 800 mesh, 1000 mesh coarse sandpaper and fine sandpaper, each time the next level of grinding Turn the sample 90°, after polishing, clean the surface with absolute ethanol and dry it;

[0040] Step 3. Polish the duralumin wire with velvet polishing cloth and W2.5 polishing agent for 30-90 seconds; then use wool polishing cloth and W0.5 polishing agent for polishing for 30 seconds. -90s, add a small amount of absolute ethanol or pure water when polishing;

[0041] Step 4, before etching, use a nitric acid alcohol solution with a mass c...

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Abstract

The invention relates to the technical field of etching methods and particularly discloses a super-pure aluminum microscopic tissue form etching agent and an etching method thereof. The etching agentis a mixture of hydrofluoric acid, nitric acid and purified water, wherein the volume ratio of hydrofluoric acid to nitric acid to purified water is (5-10) to 10 to (80-85). A reagent adopted in the preparation method is simple and capable of corroding novel high-conductivity hard aluminum leads, and a grain boundary is selectively etched according to the difference between the grain boundary andthe internal electrode potential in a grain in the premise that second-phase particles and other compounds in the tissue are not etched, so that a clear microscopic tissue can be displayed, and the compounds generated in the material and the separated second-phase particles can be preserved, and the reagent can be applied to the etching of a microscopic tissue of a hard aluminum lead used in existing projects.

Description

technical field [0001] The invention relates to the technical field of etching methods, in particular to an etchant for ultra-pure aluminum microstructure morphology and an etching method. Background technique [0002] Duralumin wire is widely used in high-voltage transmission lines. The conductivity of the wire directly affects the transmission capacity and transmission loss of the transmission line. By studying the formula and production process of the duralumin conductor material, a new type of high-conductivity duralumin wire can be developed to meet the Under the condition of the strength of the wire, the conductivity of the wire is improved and the cost is reduced, so as to realize energy saving and consumption reduction. By observing the microstructure of the wire, it can be microscopically evaluated whether the purification process, casting process, rolling process and drawing process of the wire meet the requirements of the experimental research. GB / T3246.1-2012 "M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32
CPCG01N1/32
Inventor 王勇冯砚厅徐雪霞李文彬李国维董国振
Owner 囯网河北省电力有限公司电力科学研究院
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