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Aluminum-zinc-indium-erbium sacrificial anode and preparation method thereof

An al-zn-in-er, sacrificial anode technology, applied in the field of corrosion and protection, to achieve the effects of improving anode performance, improving mechanical properties, and improving current efficiency

Inactive Publication Date: 2016-06-08
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above studies are mainly aimed at improving the current efficiency of the material, the actual capacitance or the dissolution morphology of the alloy, while ignoring the influence of the mechanical properties of the anode on the installation and use of the anode, especially the equipment process of the special-shaped anode in a complex environment. In the middle, there are higher requirements for the mechanical properties of the anode

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  • Aluminum-zinc-indium-erbium sacrificial anode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] An Al-Zn-In-Er sacrificial anode is composed of the following components in mass percentage: Zn4.5wt%, In0.02wt%, Er0.2wt%, impurity content≤0.15wt%, and the rest is aluminum. Iron in impurities≤0.1wt%.

[0017] Zinc, indium, erbium and aluminum are respectively added in the form of master alloys, the master alloys are Al-Zn alloy containing 10wt% Zn, Al-In containing 0.1wt% In, and Al-Er containing 4wt% Er. The master alloy is obtained by repeated melting three times in a vacuum arc melting furnace to ensure uniform composition.

[0018] The preparation method of Al-Zn-In-Er sacrificial anode adopts high-frequency induction melting under normal pressure and dynamic argon protection, and calculates and measures Al-Zn alloy, Al-In alloy, Al-Er alloy and pure aluminum are placed in a high-frequency induction melting furnace, heated to 720°C and held for 15 minutes, poured in a cast steel mold at a pouring temperature of 720°C, and the cast steel mold is preheated at 300°...

Embodiment example 2

[0021] An Al-Zn-In-Er sacrificial anode is composed of the following components in mass percentage: Zn4wt%, In0.03wt%, Er0.4wt%, impurity content≤0.15wt%, and the rest is aluminum. Iron in impurities≤0.1wt%.

[0022] Zinc, indium, erbium and aluminum are respectively added in the form of master alloys, the master alloys are Al-Zn alloy containing 10wt% Zn, Al-In containing 0.1wt% In, and Al-Er containing 4wt% Er. The master alloy is obtained by repeated melting four times in a vacuum arc melting furnace to ensure uniform composition.

[0023] The preparation method of Al-Zn-In-Er sacrificial anode adopts high-frequency induction melting under normal pressure and dynamic argon protection, and calculates and measures Al-Zn alloy, Al-In alloy, Al-Er alloy and pure aluminum are placed in a high-frequency induction melting furnace, heated to 730°C and held for 12 minutes, poured in a cast steel mold at a pouring temperature of 720°C, and the cast steel mold is preheated at 300°C f...

Embodiment example 3

[0026] An Al-Zn-In-Er sacrificial anode is composed of the following components in mass percentage: Zn5wt%, In0.03wt%, Er0.8wt%, impurity content≤0.15wt%, and the rest is aluminum. Iron in impurities≤0.1wt%.

[0027] Zinc, indium, erbium and aluminum are respectively added in the form of master alloys, the master alloys are Al-Zn alloy containing 10wt% Zn, Al-In containing 0.1wt% In, and Al-Er containing 4wt% Er. The master alloy is obtained by repeated melting three times in a vacuum arc melting furnace to ensure uniform composition.

[0028] The preparation method of Al-Zn-In-Er sacrificial anode adopts high-frequency induction melting under normal pressure and dynamic argon protection, and calculates and measures Al-Zn alloy, Al-In alloy, Al-Er alloy and pure aluminum are placed in a high-frequency induction melting furnace, heated to 760°C and held for 10 minutes, poured with a cast steel mold at a pouring temperature of 720°C, and the cast steel mold is preheated at 300°...

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Abstract

The invention discloses an aluminum-zinc-indium-erbium sacrificial anode. The aluminum-zinc-indium-erbium sacrificial anode is composed of, by weight, 3.5-5.5% of zinc, 0.01-0.05% of indium, 0.05-2% of erbium, impurities smaller than or equal to 0.15% and the balance aluminum. The invention further discloses a preparation method of the aluminum-zinc-indium-erbium sacrificial anode. According to the preparation method, high-frequency induction melting under normal pressure and dynamic argon gas protection is adopted, aluminum-zinc alloy, aluminum-indium alloy, aluminum-erbium alloy and pure aluminum are placed into a high-frequency induction melting furnace after being calculated and measured according to the mass percent, are heated to 700-760 DEG C with the temperature preserved for 10-15 minutes and then are poured through cast steel dies with the pouring temperature being 720 DEG C, wherein the cast steel dies are preheated at 300 DEG C for 20 minutes before pouring; the aluminum-zinc alloy, the aluminum-indium alloy, the aluminum-erbium alloy and the pure aluminum are taken out after being cooled, and finally the aluminum-zinc-indium-erbium sacrificial anode is obtained. According to the anode, the anode working potential ranges from -1.1 V to -1.05 V, the current efficiency is greater than or equal to 85%, corrosion products easily fall off, surface dissolution is uniform, alloy structures are refined, the average size of alpha-aluminum dendritic crystals is smaller than or equal to 25 micrometers, and the Vickers hardness is greater than or equal to 32 HV. The sacrificial anode has the advantages that the electrochemical performance is good and the mechanical property is improved and is suitable for realizing cathode protection for steel components especially large complex components working in the water environment.

Description

technical field [0001] The invention belongs to the technical field of corrosion and protection, and in particular relates to an Al-Zn-In-Er sacrificial anode and a preparation method thereof. Background technique [0002] Metal corrosion is one of the main forms of failure of metal equipment and components, which brings huge economic losses, causes some catastrophic accidents, and consumes precious resources. Sacrificial anode cathodic protection is an important electrochemical anti-corrosion method. It connects the metal to be protected with an active metal with a more negative potential to form a galvanic couple battery, and relies on the cathodic current generated by the continuous dissolution of the sacrificial anode to achieve cathodic protection. Sacrificial anode cathodic protection has been widely used because of its advantages of no external current, simple construction and installation, low cost, and good operation especially in low-resistance environments. Sacri...

Claims

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Application Information

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IPC IPC(8): C23F13/14C22C21/10C22C1/03
CPCC22C1/026C22C1/03C22C21/10C23F13/14
Inventor 许征兵李航魏兵曾建民
Owner GUANGXI UNIV