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Anti-corrosion aluminum alloy

An aluminum alloy and alkali etching technology, applied in the field of corrosion-resistant aluminum alloys, can solve the problems of poor corrosion resistance of aluminum-silicon alloys, and achieve the effect of improving corrosion resistance

Inactive Publication Date: 2013-09-11
四川铭帝铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor corrosion resistance of existing aluminum-silicon alloys and provide an aluminum alloy with excellent corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 4% silicon, 3% magnesium, 0.2% chromium, 0.3% titanium, 0.04% manganese, 0.1% tungsten, 0.16% ytterbium, 0.02% nickel, 1.6% zinc, and the balance aluminum into the melting furnace by weight. , melted at 950°C, and cast to obtain alkali-etched aluminum alloy.

Embodiment 2

[0014] Add 5% silicon, 3.5% magnesium, 0.14% chromium, 0.2% titanium, 0.05% manganese, 0.13% tungsten, 0.1% ytterbium, 0.03% nickel, 1.7% zinc, and the balance aluminum into the melting furnace by weight. , melted at 1000°C, and cast to obtain alkali-etched aluminum alloy.

Embodiment 3

[0016] Add 6% silicon, 4% magnesium, 0.1% chromium, 0.4% titanium, 0.08% manganese, 0.15% tungsten, 0.18% ytterbium, 0.026% nickel, 1.5% zinc, and the balance aluminum into the melting furnace by weight. , melted at 900°C, and cast to obtain alkali-etched aluminum alloy.

[0017] Corrosion resistance test: The alloy was immersed in 1% NaOH in the corrosion medium for 1 month. The Si-Mg-Al alloy with the same silicon and magnesium content was used in the comparison experiment. The results are as follows:

[0018] .

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Abstract

The invention discloses an anti-corrosion aluminum alloy which consists of the following components in percentage by weight: 4-6% of silicon, 3-4% of magnesium, 0.1-0.2% of chromium, 0.2-0.4% of titanium, 0.04-0.08% of manganese, 0.1-0.15% of tungsten, 0.1-0.18% of ytterbium, 0.02-0.03% of nickel, 1.5-1.7% of zinc and the balance of aluminum. According to the anti-corrosion aluminum alloy disclosed by the invention, the corrosion resistance (particularly alkali corrosion resistance) of the aluminum alloy can be obviously improved, and the corrosion rate is reduced to about 0.0005g / (m<2>.h) from 0.032-0.037g / (m<2>.h).

Description

technical field [0001] The invention belongs to the field of aluminum alloys, in particular to a corrosion-resistant aluminum alloy. Background technique [0002] Al-Si alloy has good ductility and is often used as a deformed alloy. However, due to the selective corrosion of Al-Si eutectic in actual use, how to improve the anti-corrosion performance of Al-Si alloy has become an urgent problem to be solved. Contents of the invention [0003] The object of the present invention is to solve the problem of poor corrosion resistance of existing aluminum-silicon alloys and provide an aluminum alloy with excellent corrosion resistance. [0004] The technical scheme adopted by the present invention to realize the above object is as follows: [0005] A corrosion-resistant aluminum alloy, composed by weight: 4-6% silicon, 3-4% magnesium, 0.1-0.2% chromium, 0.2-0.4% titanium, 0.04-0.08% manganese, 0.1-0.15% tungsten, ytterbium 0.1-0.18%, nickel 0.02-0.03%, zinc 1.5-1.7%, and the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02
Inventor 蒋伟锋
Owner 四川铭帝铝业有限公司
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