A method for preparing a frosted surface on a Zr-based bulk amorphous alloy

A technology of zirconium-based amorphous alloys and amorphous alloys, which is applied to the field of preparing frosted surfaces on Zr-based bulk amorphous alloys, can solve the problems of amorphous alloy relaxation crystallization, impurities, and damage to the matrix performance, and reach the synthesis temperature The effect of low, uniform sanding and improved corrosion resistance

Active Publication Date: 2020-07-28
CHANGZHOU STREAM LIQUID METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the existing method of preparing a frosted surface layer on a zirconium-based amorphous alloy, which easily leads to relaxation crystallization of the amorphous alloy, damages the properties of the matrix, and may introduce impurities, the present invention provides a Zr-based bulk amorphous A method for preparing a frosted surface on an alloy. This method can prepare a dense, evenly frosted, and light gray frosted oxide film on a zirconium-based amorphous alloy by means of electrocorrosion.

Method used

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  • A method for preparing a frosted surface on a Zr-based bulk amorphous alloy
  • A method for preparing a frosted surface on a Zr-based bulk amorphous alloy
  • A method for preparing a frosted surface on a Zr-based bulk amorphous alloy

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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the zirconium-based amorphous alloy sheet after pretreatment (such as figure 2 Shown) as the anode, the cathode is a platinum sheet, the cathode and anode are placed in the electrolyte, at a temperature of 20°C and a current density of 14mA / cm 2 1. Carry out anodic oxidation under the condition that the electrolysis time is 30 minutes, take out the anode alloy sheet and dry naturally after ethanol cleaning, can prepare frosted surface on the zirconium-based amorphous alloy (such as image 3 shown). Among them, the cathode area of ​​the platinum sheet is 1.5 times that of the anode area of ​​the alloy sheet, and the electrolyte used is composed of NH 4 F and Na 2 SO 4 Prepared by dissolving in water, NH 4 F and Na 2 SO 4 The molar ratio after dissolution is 2:10, F - The concentration is 0.4mol / L.

[0029] The surface of the zirconium-based amorphous alloy prepared in this example has a frosted structure, and the structure of the oxid...

Embodiment 2

[0031] Such as figure 1 As shown, the zirconium-based amorphous alloy sheet after pretreatment is used as the anode, and the cathode is a graphite plate. 2 1. Carry out anodic oxidation under the condition that the electrolysis time is 30 minutes, take out the anode alloy sheet, wash it with ethanol, and then dry it naturally, so that a frosted surface can be prepared on the zirconium-based amorphous alloy. Among them, the graphite cathode area is equal to the alloy sheet anode area, and the electrolyte used is composed of NH 4 F and Na 2 SO 4 Prepared by dissolving in water, NH 4 F and Na 2 SO 4 The molar ratio after dissolution is 2:10, F - The concentration is 0.5mol / L.

[0032] The surface of the zirconium-based amorphous alloy prepared in this example has a frosted structure, and the structure of the oxide film layer is dense, the frosting is uniform, and the surface is light gray.

Embodiment 3

[0034] Such as figure 1 As shown, the zirconium-based amorphous alloy sheet after pretreatment is used as the anode, and the cathode is a platinum sheet. 2 1. Carry out anodic oxidation under the condition that the electrolysis time is 25 minutes, take out the anode alloy sheet, wash it with ethanol, and then dry it naturally, so that a frosted surface can be prepared on the zirconium-based amorphous alloy. Among them, the cathode area of ​​the platinum sheet is 1.5 times that of the anode area of ​​the alloy sheet, and the electrolyte used is composed of NH 4 F and Na 2SO 4 Prepared by dissolving in water, NH 4 F and Na 2 SO 4 The molar ratio after dissolution is 3:10, F - The concentration is 0.6mol / L.

[0035] The surface of the zirconium-based amorphous alloy prepared in this example has a frosted structure, and the structure of the oxide film layer is dense, the frosting is uniform, and the surface is light gray.

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Abstract

The invention discloses a method for preparing a frosted surface on a Zr-based large block amorphous alloy, and belongs to the technical field of amorphous alloy surface treatment. The method specifically comprises the following steps that the zirconium-based amorphous alloy is placed into an electrolytic cell containing electrolyte, the zirconium-based amorphous alloy is used as an anode, a graphite plate or a platinum sheet serves as a cathode, and the graphite plate or the platinum sheet is used for conducting electric corrosion under the constant current condition; and the electrolyte contains fluoride salt, the content of Zr in the zirconium-based amorphous alloy is larger than 50%, and the other elements are 3-4 kinds of Cu, Ni, Ti, Al and Be. According to the method, by an electriccorrosion mode, a frosted oxidation film which is compact in structure, uniform in sanding and shallow grey in color can be prepared on the zirconium-based amorphous alloy.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of amorphous alloys, and in particular relates to a method for preparing frosted surfaces on Zr-based bulk amorphous alloys. Background technique [0002] Amorphous alloy, also known as metallic glass, is a material in a metastable state formed by extremely high cooling rates so that the atoms of the alloy material do not have enough time to rearrange and do not crystallize. Its atoms are topologically disordered in three-dimensional space, and have a unique structure of long-range disorder and short-range order, thus exhibiting excellent physical, chemical and mechanical properties. Among amorphous alloys, zirconium-based amorphous alloys with Zr as the main element have strong glass forming ability (GFA) and a wide supercooled liquid phase region, and can be easily prepared with less complicated equipment. Larger, easily formable bulk amorphous alloys. Therefore, zirconium-based amor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/08
CPCC25F3/08
Inventor 何世伟田荣荣孙利曹祚君陈汉森申曦
Owner CHANGZHOU STREAM LIQUID METAL CO LTD
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