Bi containing magnesium alloy sacrificial anode material

A sacrificial anode and magnesium alloy technology, applied in the field of Bi-containing magnesium alloy sacrificial anode materials, can solve the problems of affecting service life and uneven consumption of magnesium alloy sacrificial anode materials, and achieve the effects of uniform consumption, low cost and convenient operation

Active Publication Date: 2016-06-15
LUOYANG INST OF SCI & TECH
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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 to provide a sacrificial anode material of a magnesium alloy containing Bi to solve the problem that the existing magnesium alloy sacrificial anode material consumes unevenly in a corrosive environment and affects the service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The Bi-containing magnesium alloy sacrificial anode material of the present embodiment is composed of the following components in mass percentage: Al4.8%, Zn0.6%, Bi0.3%, and the balance is Mg and unavoidable impurities; wherein the impurity element Si The total mass content of , Fe, Cu and Ni in the anode material is less than 0.2%.

[0019] The preparation method of the Bi-containing magnesium alloy sacrificial anode material of the present embodiment is to get the alloy raw materials pure magnesium (Mg), pure aluminum (Al), pure zinc (Zn) and pure bismuth (Bi) according to the above-mentioned components and contents, and adopt Corundum crucible and induction furnace for smelting to obtain magnesium liquid; in CO 2 +SF 6 Under the protection of mixed gas, the magnesium liquid is heated to 720° C. and poured into a steel mold to obtain a magnesium alloy ingot, which is the magnesium alloy sacrificial anode material.

Embodiment 2

[0021] The Bi-containing magnesium alloy sacrificial anode material of the present embodiment is composed of the following components by mass percentage: Al4.9%, Zn0.5%, Bi0.4%, and the balance is Mg and unavoidable impurities; wherein the impurity element Si The total mass content of , Fe, Cu and Ni in the anode material is less than 0.2%.

[0022] The preparation method of the Bi-containing magnesium alloy sacrificial anode material in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0024] The Bi-containing magnesium alloy sacrificial anode material of the present embodiment is composed of the following components in mass percentage: Al5.0%, Zn0.4%, Bi0.5%, and the balance is Mg and unavoidable impurities; wherein the impurity element Si The total mass content of , Fe, Cu and Ni in the anode material is less than 0.2%.

[0025] The preparation method of the Bi-containing magnesium alloy sacrificial anode material in this embodiment is the same as that in Embodiment 1.

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Abstract

The invention discloses a Bi containing magnesium alloy sacrificial anode material.The magnesium alloy sacrificial anode material is prepared from, by mass, 4.8% to 5.0% of Al, 0.4% to 0.6% of Zn, 0.3% to 0.5% of Bi and the balance Mg and inevitable impurities.According to the Bi containing magnesium alloy sacrificial anode material, the alloy component is Mg-Al-Zn-Bi, Bi is added on the basis of combined use of Zn and Al, crystal grins are refined, and the structure is improved.The obtained magnesium alloy sacrificial anode material has the advantages of being even in consumption, low in consumption speed, long in service life and the like when used, is suitable for cathode protection in the corrosive environments of soil, seawater, water heaters and the like, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy anode materials, and in particular relates to a sacrificial anode material of a magnesium alloy containing Bi. Background technique [0002] The economic loss caused by the corrosion of metal materials is huge. Using sacrificial anodes for electrochemical protection is an effective method to prevent metal materials from corroding, and it is of great significance to improve the corrosion resistance and prolong the service life of metal materials. The sacrificial anode method is to electrically connect a metal or alloy with a more negative potential to the protected metal structure, and provide protection current to the protected object through the continuous consumption and dissolution of the electronegative metal or alloy, so that the metal structure is protected. . [0003] Magnesium alloys have good electrochemical properties, and are often used as sacrificial anode materials to protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/14C22C23/02C22C1/02
CPCC22C1/02C22C23/02C23F13/14
Inventor 李萍王莹徐玉梅崔扬贾利晓张东晓赵靓雯
Owner LUOYANG INST OF SCI & TECH
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