Electrolytic corrosive agent and corrosion method for displaying metallographic structure of high-purity aluminum

A metallographic structure and electrolytic corrosion technology, applied in the field of metallographic electrolytic corrosion, can solve the problems of high experimental cost, poor display effect, and poor versatility, and achieve the effect of cheap price, simple composition, and convenient preparation
CN106987893AInactive Publication Date: 2017-07-28INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
Publication Date
2017-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an electrolytic corrosive agent and corrosion method for displaying the metallographic structure of high-purity aluminum. The electrolytic corrosive agent is a mixture of the 40% hydrogen fluoride solution, boric acid and distilled water, wherein the ratio of the 40% hydrogen fluoride solution (ml) to the boric acid (g) to the distilled water (ml) is 18-23 to 2.5-3 to 200. The corrosion method comprises the following steps: (1) cleaning the surface of a sample before electrolytic corrosion; (2) preparing the electrolytic corrosive agent; (3) using the corrosive agent prepared in the step (2) for carrying out electrolytic corrosion according to specific electrolysis parameters; and (4) after electrolytic corrosion, cleaning the sample. According to the electrolytic corrosive agent and corrosion method, the corrosion effect is obvious, the operation is simple, the corrosion efficiency is high, the metallographic structure after corrosion can be clearly seen under a common optical microscope, a professional polarization device does not need to be additionally arranged, the experiment cost is reduced, and convenience is provided for better observing the structure texture of the high-purity aluminum.
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Description

technical field

[0001] The invention relates to the technical field of metallographic electrolytic corrosion, in particular to an electrolytic etchant and a corrosion method for displaying the metallographic structure of high-purity aluminum. Background technique

[0002] High-purity aluminum has a series of excellent physical and chemical properties, low density, high thermal conductivity and electrical conductivity, high reflectivity to light, strong corrosion resistance to the atmosphere, good processing and forming performance, and no low-temperature brittleness , its strength and plasticity both increase with the decrease of temperature, and it has a wide range of applications in the electronics industry and aerospace fields.

[0003] According to statistics, 96% of the 5N5-6N high-purity aluminum is used in the semiconductor device manufacturing industry, and the largest amount of sputtering metal targets is the high-purity aluminum target. Enterprises cannot stably pr...

Claims

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