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Aluminum alloy tube resistant to seawater corrosion and preparation method thereof

A corrosion-resistant aluminum alloy and aluminum alloy pipe technology, which is applied to pipes, rigid pipes, mechanical equipment, etc., can solve the problems of short service life and poor seawater corrosion resistance

Active Publication Date: 2012-05-23
JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First choose the following raw materials in parts by weight:

[0028] 0.6 parts of magnesium ingots, 98.5 parts of aluminum ingots. In the aluminum ingot: the content of silicon is 0.075 (weight) %, the content of iron is 0.14 (weight) %, the content of copper is 0.004 (weight) %, and the content of zinc is 0.0035 (weight) %. In the magnesium ingot, the weight content of magnesium is more than or equal to 99.8%.

[0029] Then, put the aluminum ingot into a melting furnace with a temperature of 730°C to melt it into a melt.

[0030] Then add the magnesium ingot and stir for 10 minutes.

[0031] After that, the temperature of the melt in the melting furnace was raised to 740°C. At the same time, the aluminum rare earth alloy is added according to the ratio of 0.3 kg of aluminum rare earth alloy / ton of melt, and stirred for 5 minutes, and the melt is subjected to furnace modification treatment.

[0032] Afterwards, use argon as a carrier to spray refined powder to the ...

Embodiment 2

[0042] First select the raw materials of following parts by weight:

[0043] 1.2 parts of magnesium ingots, 97.9 parts of aluminum ingots. In the aluminum ingot: the content of silicon is 0.06 (weight) %, the content of iron is 0.12 (weight) %, the content of copper is 0.0035 (weight) %, and the content of zinc is 0.004 (weight) %. In the magnesium ingot, the weight content of magnesium is more than or equal to 99.8%.

[0044] Then, put the aluminum ingot into a melting furnace with a temperature of 741°C to melt it into a melt.

[0045] Then add the magnesium ingot and stir for 12 minutes.

[0046] After that, the temperature of the melt in the melting furnace was raised to 746°C. At the same time, the aluminum rare earth alloy is added according to the ratio of 0.5 kg of aluminum rare earth alloy / ton of melt, and stirred for 8 minutes, and the melt is modified in the furnace.

[0047] After that, use argon as the carrier to spray refined powder to the melt in the melting...

Embodiment 3

[0057] First choose the following raw materials in parts by weight:

[0058] 1.8 parts of magnesium ingots, 99.2 parts of aluminum ingots. In the aluminum ingot: the content of silicon is 0.045 (weight) %, the content of iron is 0.11 (weight) %, the content of copper is 0.002 (weight) %, and the content of zinc is 0.003 (weight) %. In the magnesium ingot, the weight content of magnesium is more than or equal to 99.8%.

[0059] Then, put the aluminum ingot into a melting furnace with a temperature of 750°C to melt it into a melt.

[0060] Then add the magnesium ingot and stir for 15 minutes.

[0061] After that, the temperature of the melt in the melting furnace was raised to 760°C. At the same time, the aluminum rare earth alloy is added according to the ratio of 0.8 kg aluminum rare earth alloy / ton of melt, and stirred for 10 minutes, and the melt is modified in the furnace.

[0062] After that, use argon as the carrier to spray refined powder to the melt in the melting f...

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Abstract

The invention relates to an aluminum alloy tube resistant to seawater corrosion, in particular to an aluminum alloy tube with high seawater corrosion resistance. The aluminum alloy tube is manufactured from magnesium, aluminum and other raw materials through the steps of: melting, stirring, in-furnace modification treatment, impurity removal, fining treatment, online argon refining, purification treatment, casting, homogenization treatment, extrusion, cold drawing and the like. The aluminum alloy tube has the advantages of good seawater corrosion resistance and long service life, is particularly suitable for equipment for low-temperature multi-effect seawater distillation and seawater desalination treatment.

Description

technical field [0001] The invention relates to an aluminum alloy pipe and a production method thereof. Specifically, it is an aluminum alloy pipe with high seawater corrosion resistance and a preparation method thereof, especially suitable for equipment for low-temperature multi-effect distillation of seawater and desalination treatment of seawater. Background technique [0002] At present, the aluminum alloy tubes used in equipment in contact with seawater include the following elements in parts by weight: 0.25 parts of silicon, 0.4 parts of iron, 0.1 parts of copper, 0.1 parts of manganese, 2.2 to 2.8 parts of Magnesium, 0.15-0.35 parts of chromium, 0.1 part of zinc and 9.59-96.7 parts of aluminum. Due to the high content of silicon, iron, copper, zinc and other elements in this aluminum alloy tube, it is easy to produce pitting corrosion in an environment in contact with seawater, which makes the seawater corrosion resistance of this aluminum alloy tube low. And becaus...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C1/02C22F1/06F16L9/02
Inventor 冯身霖李志军张大平
Owner JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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