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Electropolishing fluid and electropolishing method used for preparing magnesium alloy EBSD sample

An electrolytic polishing and magnesium alloy technology, applied in the field of magnesium alloy surface treatment, can solve the problems of uncertain composition ratio of electrolyte, uncertain electrolytic polishing parameters, poor electrolytic polishing effect, etc. The effect of promotion

Active Publication Date: 2018-01-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of commercial AC-2 electrolytic polishing liquid is as high as 5,000 yuan / liter, and its production has been completely discontinued. There is currently no similar product produced and sold in China
At present, domestic researchers mainly use their own prepared electrolytic polishing solution and electrolytic polishing method to prepare magnesium alloy EBSD samples, but most of them are in the stage of exploration, the proportion of electrolyte components is uncertain, the parameters of electrolytic polishing are uncertain, and the effect of electrolytic polishing is not good.

Method used

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  • Electropolishing fluid and electropolishing method used for preparing magnesium alloy EBSD sample
  • Electropolishing fluid and electropolishing method used for preparing magnesium alloy EBSD sample
  • Electropolishing fluid and electropolishing method used for preparing magnesium alloy EBSD sample

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In this embodiment, ZK30 extruded magnesium alloy is used for electropolishing treatment, and the contents of each component in each liter of electropolishing liquid are: n-propanol 100ml, perchloric acid 10ml, deionized water 15ml, hydroxyquinoline 8g, citric acid 70g, sodium thiocyanate 40g, and the balance is dehydrated alcohol. Include the following steps:

[0021] (1) Pour the electrolytic polishing solution into a beaker, the volume of the electrolytic polishing solution is sufficient to fully immerse the sample, and put the beaker into a water tank containing a mixture of ice and water;

[0022] (2) Use the stainless steel sheet as the cathode, connect to the negative pole of the constant current stabilized voltage power supply, and immerse in the bottom of the beaker filled with electrolytic polishing solution, use the magnesium alloy sample as the anode, and connect to the positive pole of the constant current stabilized voltage power supply;

[0023] (3) Befo...

Embodiment 2

[0027] In this embodiment, AZ31 extruded magnesium alloy is used for electropolishing treatment, and the contents of each component in each liter of electropolishing liquid are: n-propanol 95ml, perchloric acid 12ml, deionized water 16ml, hydroxyquinoline 9g, citric acid 65g, sodium thiocyanate 41g, and the balance is dehydrated alcohol. Include the following steps:

[0028] (1) Pour the electrolytic polishing solution into a beaker, the volume of the electrolytic polishing solution is sufficient to fully immerse the sample, and put the beaker into a water tank containing a mixture of ice and water;

[0029] (2) Use the stainless steel sheet as the cathode, connect to the negative pole of the constant current stabilized voltage power supply, and immerse in the bottom of the beaker filled with electrolytic polishing solution, use the magnesium alloy sample as the anode, and connect to the positive pole of the constant current stabilized voltage power supply;

[0030] (3) Befor...

Embodiment 3

[0033] In this embodiment, ZK30-Nd extruded aging state magnesium alloy is used for electrolytic polishing treatment, and the contents of each component in each liter of electrolytic polishing liquid are: n-propanol 100ml, perchloric acid 10ml, deionized water 15ml, hydroxyquinoline 8g , citric acid 70g, sodium thiocyanate 40g, and the balance is dehydrated alcohol. Include the following steps:

[0034] (1) Pour the electrolytic polishing solution into a beaker, the volume of the electrolytic polishing solution is sufficient to fully immerse the sample, and put the beaker into a water tank containing a mixture of ice and water;

[0035] (2) Use the stainless steel sheet as the cathode, connect to the negative pole of the constant current stabilized voltage power supply, and immerse in the bottom of the beaker filled with electrolytic polishing solution, use the magnesium alloy sample as the anode, and connect to the positive pole of the constant current stabilized voltage powe...

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Abstract

The invention discloses an electropolishing fluid and an electropolishing method used for preparing a magnesium alloy EBSD sample, and belongs to the technical field of magnesium alloy surface treatment. Each liter of the electropolishing fluid comprises 90-100 ml of normal propyl alcohol, 10-15 ml of perchloric acid, 15-20 ml of deionized water, 8-12 g of hydroxyquinoline, 60-70 g of citric acid,40-45 g of sodium thiocyanate and the balance absolute ethyl alcohol. The electropolishing fluid provided by the invention can be used for effectively removing a stress layer and an oxide layer on the surface of a magnesium alloy, the surface of electropolished magnesium alloy is level, bright, clean and free of continuous etch pits, and compared with an existing magnesium alloy electropolishingfluid, the electropolishing fluid has the advantages of being extensive in material source, easy to prepare, low in cost, high in calibration rate and the like. The invention further discloses the magnesium alloy EBSD sample electropolishing method which is easy to operate, low in cost and stable in effect.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy surface treatment, and in particular relates to an electrolytic polishing solution and an electrolytic polishing method for preparing magnesium alloy EBSD samples. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and specific stiffness, small elastic modulus, high dimensional stability, good thermal conductivity, etc., and has been widely used in aerospace, automobile, electronic communication and other fields; With biodegradability, it also has great application prospects as a medical implant material. Due to the poor mechanical properties and corrosion resistance of cast magnesium alloys, magnesium alloys generally have to undergo a series of processing procedures such as extrusion, drawing or rolling before use, and magnesium alloys will form texture during deformation. Grains will have a preferred orientation. In recent years, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/18
Inventor 宋仁伯蔡长宏汪孪祥黄良
Owner UNIV OF SCI & TECH BEIJING
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