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Electrolyte and zirconium or zirconium alloy surface micro-arc oxidation method

A micro-arc oxidation and electrolyte technology, applied in the field of electrolyte, can solve problems such as poor corrosion resistance, and achieve the effect of improving corrosion resistance

Active Publication Date: 2010-06-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is in order to overcome the shortcoming of the poor corrosion resistance of zirconium and zirconium alloy in the prior art, provide a kind of electrolytic solution and the surface micro-arc oxidation method that can improve the corrosion resistance of zirconium and zirconium alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example illustrates the electrolytic solution and the micro-arc oxidation method for the surface of zirconium and zirconium alloys of the present invention.

[0024] (1) Solution preparation

[0025] Electrolyte: prepare 100L electrolyte, wherein the content of potassium fluozirconate is 4g / L, the content of potassium fluoborate is 4g / L, the content of zinc acetate is 4g / L, and the content of sodium hydroxide is 4g / L;

[0026] Degreasing solution: prepare 120L of degreasing solution, wherein the content of sodium hydroxide is 30g / L, the content of sodium phosphate is 40g / L, and the content of sodium silicate is 25g / L.

[0027] (2) Degreasing

[0028] With 10cm * 3cm * 2mm zirconium alloy sheet (hnologies company, this zirconium alloy contains the zirconium of 50% by weight, the titanium of 10% by weight, the copper of 5% by weight, the nickel of 15% by weight, the beryllium of 15% by weight, the beryllium of 5% by weight Tin) soaked in the degreasing solution pre...

Embodiment 2

[0045] Adopt the method identical with embodiment 1 to prepare electrolytic solution and carry out micro-arc oxidation treatment to zirconium alloy, difference is: the content of potassium fluozirconate in electrolytic solution is 8g / L, and the content of potassium fluoborate is 8g / L, The content of zinc acetate is 6g / L, and the content of sodium hydroxide is 8g / L.

[0046] Through the above steps, a zirconium alloy workpiece with a gray micro-arc oxidation film on the surface is finally obtained, denoted as A2.

Embodiment 3

[0048] Adopt the method identical with embodiment 1 to prepare electrolytic solution and carry out micro-arc oxidation treatment to zirconium alloy, difference is: the content of potassium fluozirconate in electrolytic solution is 9g / L, and the content of potassium fluoborate is 10g / L, The content of zinc acetate is 7g / L, and the content of sodium hydroxide is 9g / L.

[0049] Through the above steps, a zirconium alloy workpiece with a gray micro-arc oxidation film on the surface is finally obtained, which is denoted as A3.

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Abstract

The invention provides electrolyte. The electrolyte is aqueous solution; and the aqueous solution contains fluorozirconate, borofluoride, water-soluble carboxylate of zinc and alkali metal hydroxide. The invention also provides a zirconium or zirconium alloy surface micro-arc oxidation method, wherein the electrolyte adopted by the micro-arc oxidation is the electrolyte provided by the invention. Through the method of the invention, a micro-arc oxidation film is formed on the surface of zirconium or zirconium alloy so as to greatly improve the corrosion resistance of the zirconium or zirconium alloy. In addition, the method of the invention also can further improve stain resistance, compactness, hardness, abrasion resistance and electrical insulating property of the zirconium or zirconium alloy surface.

Description

【Technical field】 [0001] The invention relates to an electrolytic solution and also relates to a method for using the electrolytic solution to carry out micro-arc oxidation on the surface of zirconium and zirconium alloy. 【Background technique】 [0002] The content of zirconium in the earth's crust is quite large, which is larger than that of commonly used metals such as zinc, copper, tin, etc., and is light gray. Zirconium alloys can be formed by adding other elements based on zirconium, such as tin, niobium, and iron. Zirconium alloy has excellent properties such as moderate mechanical properties, low atomic thermal neutron absorption cross section, strong plasticity, toughness and good biocompatibility, making it widely used in nuclear reactors, plastic processing, welding and other fields. However, zirconium and zirconium alloys have poor corrosion resistance at room temperature, which greatly limits their applications. [0003] In order to improve the corrosion resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 王磊
Owner BYD CO LTD
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