Anti-corrosion aluminum alloy pipe and preparation method thereof

A corrosion-resistant aluminum alloy and aluminum alloy tube technology, applied in the field of aluminum alloy materials, can solve problems such as parts leakage, product scrapping, corrosion penetration, etc., and achieve the effects of improving corrosion resistance, increasing strength, and reducing harmful impurities

Active Publication Date: 2017-12-08
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

[0002] In today's lightweight era that advocates energy saving, aluminum alloy tubes are more and more widely used in various industries due to their low density. While meeting the mechanical strength, the requirements for the corrosion resistance of aluminum alloy tubes are also getting higher and higher. The common 3003 aluminum alloy pipe and its processing technology widely used at present have been difficult to meet the customer's increasing corrosion resistance requirements. After 480 cycles (960h) in the PV1208 seawater salt spray test, the maximum corrosion depth of the ordinary 3003 aluminum alloy pipe Exceeding more than 50% of the original wall thickness of the aluminum tube, some even corrode and penetrate, resulting in leakage of parts and scrapping of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. According to the mass percentage of elements in aluminum alloy tubes Si: 0.06%, Fe: 0.1%, Cu: 0.005%, Mn: 0.81%, Mg: 0.22%, Zn: 0.003%, Ti: 0.015%, other impurities: 0.03 %, Al: balance.

[0034] Weigh the pure aluminum ingot, manganese agent, pure magnesium ingot and aluminum-titanium-boron grain refiner for smelting respectively, and then put them into a dry smelting furnace in turn, heat and melt them into an aluminum alloy solution, and the temperature in the smelting furnace is controlled at 742°C. The specific implementation steps are: weighing each raw material for smelting→putting pure aluminum ingots into the melting furnace→heating the molten aluminum in the melting furnace to 742°C and keeping it warm→adding slagging agent and removing slag→adding manganese agent, Adjust the composition of pure magnesium ingots and aluminum-titanium-boron grain refiners→stir for 10min→sampling and spectroscopic analysis of chemical composition→add aluminum rare earth allo...

Embodiment 1

[0042]The aluminum alloy tube produced in Example 1 has a tensile strength of 114Mpa, a yield strength of 35.1Mpa, and an elongation of 42%; the grain size of the cross section and the longitudinal section are uniform, and the average grain size of the cross section of the aluminum tube is about 48.3 μm , the average grain size of the longitudinal section is about 56.7μm. After 480 cycles (960h) of the seawater salt spray corrosion test (standard PV1208), the maximum corrosion depth of the aluminum tube is 0.19mm (accounting for 16% of the wall thickness of 1.2mm).

Embodiment 2

[0044] 1. According to the mass percentage of elements in aluminum alloy tubes Si: 0.08%, Fe: 0.14%, Cu: 0.008%, Mn: 0.98%, Mg: 0.38%, Zn: 0.007%, Ti: 0.035%, other impurities: 0.04 %, Al balance. Weigh the pure aluminum ingot, manganese agent, pure magnesium ingot and aluminum-titanium-boron grain refiner for smelting respectively, and then put them into a dry smelting furnace in turn, heat and melt them into an aluminum alloy solution, and the temperature in the smelting furnace is controlled at 755°C. The specific implementation steps are: weighing the raw materials for smelting → putting pure aluminum ingots into the melting furnace → heating the molten aluminum in the melting furnace to 755°C and keeping it warm → adding slagging agent and removing slag → adding manganese agent, Adjust the composition of pure magnesium ingots and aluminum-titanium-boron grain refiner→stir for 14min→sampling and spectroscopic analysis of chemical composition→add aluminum rare earth alloy,...

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Abstract

The invention provides an anti-corrosion aluminum alloy pipe and belongs to the technical field of aluminum alloy materials. The composition elements of the aluminum alloy pipe comprise, by mass, 0.05-0.1% of Si, 0.15% of Fe or the less, 0.01% of Cu or the less, 0.8-1.0% of Mn, 0.2-0.4% of Mg, 0.01% of Zn or the less, 0.01-0.05% of Ti, 0.05% of the other elements or the less and the balance Al. According to the anti-corrosion aluminum alloy pipe, through adjustment of components and change of the technique, the anti-corrosion performance of the aluminum pipe can be effectively improved while the 3003 aluminum pipe strength is met, and the service life of a product is prolonged.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a corrosion-resistant aluminum alloy tube and a processing method thereof. Background technique [0002] In today's lightweight era that advocates energy saving, aluminum alloy tubes are more and more widely used in various industries due to their low density. While meeting the mechanical strength, the requirements for the corrosion resistance of aluminum alloy tubes are also getting higher and higher. The common 3003 aluminum alloy pipe and its processing technology widely used at present have been difficult to meet the customer's increasing corrosion resistance requirements. After 480 cycles (960h) in the PV1208 seawater salt spray test, the maximum corrosion depth of the ordinary 3003 aluminum alloy pipe Exceeding more than 50% of the original wall thickness of the aluminum tube, some even corrode and penetrate, causing parts to leak and products to be scrappe...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/02C22C1/06C22F1/04B21C37/06
CPCB21C37/06C22C1/026C22C1/06C22C21/00C22F1/04
Inventor 丁岩钱庆
Owner JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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