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Aluminum alloy used for seawater corrosion resisting tubular product and preparing method of aluminum alloy

An aluminum alloy and seawater-resistant technology, applied in the field of aluminum alloys, can solve the problems of poor seawater corrosion resistance and short service life, and achieve the effects of long service life, excellent specific strength and light weight.

Active Publication Date: 2016-11-16
JIANGSU ASIA PACIFIC ANSINDAR ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the above-mentioned aluminum alloy tubes have poor seawater corrosion resistance and short service life in seawater contact environments.

Method used

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  • Aluminum alloy used for seawater corrosion resisting tubular product and preparing method of aluminum alloy
  • Aluminum alloy used for seawater corrosion resisting tubular product and preparing method of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An aluminum alloy used for seawater corrosion-resistant pipes, consisting of the following elements in mass percentage:

[0029] Si: 0.01%; Fe: 0.03%; Cu: 0.001%; ​​Mg: 2.2%; Zn: 0.002%; Ti: 0.01%;

[0030] Its preparation method comprises the following steps:

[0031] (1) The high-purity aluminum ingot containing the amount of silicon, iron, copper, and zinc impurities controlled within the required amount is cast into a furnace for melting; the melting temperature is controlled at 720°C; the melting time is 4 hours, and the purity of the aluminum ingot is directly Affect the corrosivity of subsequent products;

[0032] (2) Then add a refining agent whose weight is 0.15% of the quality of the aluminum alloy to be prepared, and use argon gas with a pressure of 0.06Mpa to refine the aluminum liquid for the first time for 30 minutes, and then remove the scum to remove the scum on the surface ;

[0033] (3) Then, when the temperature of the aluminum liquid is heated to ...

Embodiment 2

[0044] An aluminum alloy used for seawater corrosion-resistant pipes, consisting of the following elements in mass percentage:

[0045] Si: 0.03%; Fe: 0.08%; Cu: 0.002%; Mg: 2.3%; Zn: 0.002%; Ti: 0.015%;

[0046] Its preparation method comprises the following steps:

[0047] (1) The high-purity aluminum ingots containing silicon, iron, copper, zinc impurities are controlled within the scope of the required amount to be melted; the melting temperature is controlled at 740°C; the melting time is 3.5 hours, and the purity of the aluminum ingots is directly Affect the corrosivity of subsequent products;

[0048] (2) Then add a refining agent whose weight is 0.18% of the quality of the aluminum alloy to be prepared, and use argon gas with a pressure of 0.06 to 0.12Mpa to refine the molten aluminum for 25 minutes for the first time, and then remove the scum to remove the scum on the surface clean up;

[0049] (3) Then, when the temperature of the molten aluminum is heated to 740°C,...

Embodiment 3

[0060] An aluminum alloy used for seawater corrosion-resistant pipes, consisting of the following elements in mass percentage:

[0061] Si: 0.05%; Fe: 0.12%; Cu: 0.004%; Mg: 2.4%; Zn: 0.004%; Ti: 0.02%;

[0062] Its preparation method comprises the following steps:

[0063] (1) The high-purity aluminum ingot containing the amount of silicon, iron, copper and zinc impurities controlled within the required amount is cast into a furnace for melting; the melting temperature is controlled at 760°C; the melting time is 3 hours, and the purity of the aluminum ingot is directly Affect the corrosivity of subsequent products;

[0064] (2) Then add a refining agent whose weight is 0.15% of the quality of the aluminum alloy to be prepared, and use argon gas with a pressure of 0.12Mpa to refine the aluminum liquid for the first time for 20 minutes, and then remove the scum to remove the scum on the surface ;

[0065] (3) Then, when the temperature of the molten aluminum is heated to 760...

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Abstract

An aluminum alloy used for a seawater corrosion resisting tubular product is characterized by comprising the following elements including, by mass percent, 0%-0.05% of Si, 0%-0.12% of Fe, 0%-0.004% of Cu, 2.2%-2.4% of Mg, 0%-0.004% of Zn, 0.01%-0.02% of Ti, 0.1%-0.2% of Re and the balance Al. The prepared aluminum alloy has the beneficial effects of being light in mass, high in specific strength, long in service life, high in heat efficiency, good in corrosion resistance and the like.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an aluminum alloy suitable for seawater corrosion-resistant pipes in the field of seawater desalination heat exchange systems and a preparation method thereof. Background technique [0002] Seawater corrosion-resistant aluminum alloy pipe is one of the important parts of the heat exchange system. It is mainly used in the low-temperature multi-effect distillation seawater desalination exchange system. Compared with traditional copper pipes, titanium pipes, and steel pipes, it has light weight, high specific strength, and high thermal efficiency. High, good seawater corrosion resistance, long service life, easy processing and other excellent properties have been widely used. [0003] At present, the aluminum alloy tubes used in equipment in contact with seawater contain high content of silicon, iron, copper, zinc and other elements. In the environment in contact with seawat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/06C22C21/08C22F1/047
Inventor 孙浩明高贵军
Owner JIANGSU ASIA PACIFIC ANSINDAR ALUMINUM