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Magnesium alloy sacrificial anode containing Sm and Sb

A sacrificial anode and magnesium alloy technology, applied in the field of magnesium alloy sacrificial anode, can solve the problems of affecting the service life of anode materials, uneven consumption of anode materials, uneven organization, etc., and achieve easy automatic control, uniform dissolution consumption, and uniform organization Effect

Inactive Publication Date: 2017-05-03
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the composition design and preparation process, ordinary magnesium alloy anode materials (such as AZ63, etc.) tend to have coarse grains and uneven structures, and aluminum and magnesium form a network of Mg 17 Al 12 phase, it is easy to form a micro-battery with the magnesium matrix, which makes the consumption of the anode material uneven and affects the service life of the anode material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The magnesium alloy sacrificial anode containing Sm and Sb in this embodiment is composed of the following components in mass percentage: Al 6.6%, Sm 0.8%, Sb 0.1%, and the balance is magnesium and unavoidable impurities. The total mass percentage of Si, Fe, Cu and Ni in the impurities is less than 0.2%.

[0017] The preparation method of the magnesium alloy sacrificial anode containing Sm and Sb of the present embodiment is: get raw material pure magnesium (Mg), pure aluminum (Al), magnesium-samarium (Mg-Sm) master alloy, pure antimony (Sb), adopt Corundum crucible, induction furnace smelting, magnesium liquid; in CO 2 +SF 6 Under the protection of gas, the molten magnesium is heated to 720°C and poured into a steel mold, and cooled to obtain a magnesium alloy ingot.

Embodiment 2

[0019] The magnesium alloy sacrificial anode containing Sm and Sb in this embodiment is composed of the following components in mass percentage: Al 6.5%, Sm 0.7%, Sb 0.2%, and the balance is magnesium and unavoidable impurities. The total mass percentage of Si, Fe, Cu and Ni in the impurities is less than 0.2%.

[0020] The preparation method of the magnesium alloy sacrificial anode containing Sm and Sb in this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0022] The magnesium alloy sacrificial anode containing Sm and Sb in this embodiment is composed of the following components in mass percentage: Al 6.4%, Sm 0.6%, Sb 0.3%, and the balance is magnesium and unavoidable impurities. The total mass percentage of Si, Fe, Cu and Ni in the impurities is less than 0.2%.

[0023] The preparation method of the magnesium alloy sacrificial anode containing Sm and Sb in this embodiment is the same as that in Embodiment 1.

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Abstract

The invention relates to a magnesium alloy sacrificial anode containing Sm and Sb. The magnesium alloy sacrificial anode containing Sm and Sb comprises, by mass, 6.4%-6.6% of Al, 0.6%-0.8% of Sm, 0.1%-0.3% of Sb and the balance magnesium and inevitable impurities. The magnesium alloy sacrificial anode is made of pure magnesium, pure aluminum, magnesium-samarium intermediate alloy and pure stibium in a smelting and casting mode. According to the magnesium alloy sacrificial anode containing Sm and Sb, Sm and Sb are added to refine grains and improve the organization, the uniformity of the organization is improved, and then the consumption of a magnesium alloy anode material can be uniform in the corrosion environment. The magnesium alloy sacrificial anode has the advantages of being simple in preparation technology, long in service life and broad in application prospect, and uniform to dissolve and consume, and suitable for cathodic protection in the corrosion environments such as the soil, seawater and water heaters.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy sacrificial anodes, in particular to a magnesium alloy sacrificial anode containing Sm and Sb. Background technique [0002] In order to reduce the huge economic loss caused by the corrosion of metal materials, electrochemical protection is an effective corrosion protection method. In the cathodic protection technology using sacrificial anode, the anode is gradually consumed with the flowing current, which is called sacrificial anode. As a sacrificial anode material, the metal or alloy must meet the following conditions: the potential is negative enough to supply sufficient electrons to cause cathodic polarization of the protected metal device. Magnesium alloys are often used as sacrificial anode materials to protect the cathode materials of important equipment and devices from corrosion, so as to prolong the service life of cathode materials. However, due to the composition design and p...

Claims

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Application Information

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IPC IPC(8): C23F13/14C22C23/02C22C1/03
CPCC22C1/03C22C23/02C23F13/14
Inventor 王莹李萍崔扬孟凡深郭力
Owner LUOYANG INST OF SCI & TECH