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Multielement magnesium alloy anode material for water heaters and preparation method thereof

A technology of anode material and magnesium alloy, which is applied in the field of multi-component magnesium alloy anode materials for water heaters and its preparation, can solve the problems of affecting the protection effect of water heater liners, accelerating the corrosion consumption of anode materials, limited strength and electrochemical performance, etc. Protective effect, strength improvement, effect of guaranteed protective effect

Inactive Publication Date: 2017-05-31
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, magnesium alloy anode materials used in water heaters, such as AZ31, have limited strength and electrochemical performance, and usually need to be alloyed with expensive rare earths, noble metals, or intermediate alloys, resulting in a substantial increase in alloy costs. Extrusion deformation will lead to complex alloy preparation process, and magnesium alloy has poor plasticity, extrusion deformation will produce some micro cracks, accelerate the corrosion consumption of anode materials, and affect its protection effect on cathode materials such as water heater liners

Method used

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  • Multielement magnesium alloy anode material for water heaters and preparation method thereof

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preparation example Construction

[0018] A method for preparing a multi-component magnesium alloy anode material for a water heater, comprising the following steps:

[0019] Step 1, take by weighing pure magnesium, pure aluminum, pure zinc, pure bismuth and pure antimony according to the mass percentage described in claim 1, the pure magnesium, pure aluminum and pure zinc that will weigh are put into corundum crucible for subsequent use;

[0020] Step 2, put the corundum crucible in step 1 in CO 2 +SF 6 Under the protection of mixed gas, heat until the pure magnesium, pure aluminum and pure zinc in the crucible are completely melted, then add pure bismuth and pure antimony, and continue heating to 710°C for later use;

[0021] Step 3: pour the mixed metal liquid prepared in step 2 into a steel mold preheated to 150°C in advance, and obtain the product after cooling and solidifying.

[0022] CO in the step 2 2 and SF 6 The volume ratio is 99:1.

Embodiment 1

[0025] A multi-element magnesium alloy anode material for a water heater is composed of the following components according to mass percentage: 3% Al, 6.0% Zn, 0.1% Bi and 0.1% Sb, and the balance is Mg and unavoidable impurities. The total amount of Si, Fe, Cu and Ni in impurities is less than 0.2%.

[0026] A method for preparing a multi-component magnesium alloy anode material for a water heater, comprising the following steps:

[0027] Step 1, weighing pure magnesium, pure aluminum, pure zinc, pure bismuth and pure antimony according to the above mass percentage, and putting the weighed pure magnesium, pure aluminum and pure zinc into a corundum crucible for subsequent use;

[0028] Step 2, put the corundum crucible in step 1 in CO 2 +SF 6 Under the protection of mixed gas, heat until the pure magnesium, pure aluminum and pure zinc in the crucible are completely melted, then add pure bismuth and pure antimony, and continue heating to 710°C for later use;

[0029] Step 3:...

Embodiment 2

[0032] A multi-component magnesium alloy anode material for a water heater is composed of the following components according to mass percentage: 3.5% Al, 6.5% Zn, 0.3% Bi and 0.3% Sb, and the balance is Mg and unavoidable impurities. The total amount of Si, Fe, Cu and Ni in impurities is less than 0.2%.

[0033] The preparation process of this embodiment is the same as that of Example 1

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Abstract

The invention discloses a multielement magnesium alloy anode material for water heaters and a preparation method thereof. The multielement magnesium alloy anode material for water heaters is composed of the following components in percentage by mass: 3.0-3.5% of Al, 6.0-6.5% of Zn, 0.1-0.3% of Bi, 0.1-0.3% of Sb, and the balance of Mg and inevitable impurities. The magnesium alloy anode material is free of noble elements, and is prepared by casting without compression deformation. The magnesium alloy anode material has the characteristics of low alloy low cost, simple preparation technique, uniform anode consumption and the like, is suitable for protecting the water heater internal liner in a corrosion environment, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of magnesium-based anodes, in particular to a multi-element magnesium alloy anode material for water heaters and a preparation method thereof. Background technique [0002] Corrosion of metal materials causes huge economic losses. Using sacrificial anodes for electrochemical protection is an effective method to prevent corrosion of metal materials, which can improve the corrosion resistance and service life of metal materials. Magnesium alloy has good electrochemical performance, and is often used as the anode material of water heaters to protect the cathode material (water heater liner) to prolong its service life. [0003] However, magnesium alloy anode materials used in water heaters, such as AZ31, have limited strength and electrochemical performance, and usually need to be alloyed with expensive rare earths, noble metals, or intermediate alloys, resulting in a substantial increase in alloy costs. Extru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/02C23F13/14
CPCC22C23/04C22C1/02C23F13/14
Inventor 张清李萍陈君朱利敏顾永军刘金超陶鹏州王修贤左林杰
Owner HENAN UNIV OF SCI & TECH
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