A kind of corrodible aluminum alloy material and preparation method thereof

An aluminum alloy material and easy-to-corrosion technology, applied in the field of aluminum alloys, can solve problems such as failure to meet the use requirements and slow corrosion rate, and achieve the effects of fast corrosion rate, compact structure, and high mechanical properties

Active Publication Date: 2018-11-02
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

GB / T4948-2002 announced several corrosion-prone aluminum alloy materials, as shown in Table 1. The corrosion of aluminum alloys is accelerated by adding elements such as Zn, In, and Sn, which can be used as aluminum sacrificial anode materials, but cannot be used in oil and gas wells. plugging material, because the corrosion rate is still too slow to meet the use requirements

Method used

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  • A kind of corrodible aluminum alloy material and preparation method thereof
  • A kind of corrodible aluminum alloy material and preparation method thereof
  • A kind of corrodible aluminum alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Chemical composition (mass fraction) of easily corroded aluminum alloy: 3.0% Zn, 2.0% Mg, 0.5% Ga, 0.3% In, 0.3% Sn, 0.55% Fe, 0.3% Mn, and the rest is Al.

[0022] Preparation method of easily corroded aluminum alloy:

[0023] 1) According to the mass percentage content of each element in the aluminum alloy material, configure 99.7% pure aluminum, 99.9% pure zinc, 99.8% pure magnesium, 99.8% pure tin, 99.99% pure gallium, 99.995% pure indium, Al-20 %Fe master alloy and Al-10%Mn master alloy.

[0024] 2) First, heat up and melt 99.7% pure aluminum, Al-20% Fe master alloy and Al-10% Mn master alloy; adjust the temperature of the aluminum alloy melt to 730°C, and use an iron bell jar to dry the dried flux The refining agent is pressed into the aluminum alloy melt for refining and purification, adding a mass percentage of 0.6%, and removing slag after refining; adding 99.9% pure zinc, 99.8% pure magnesium, 99.8% pure tin, 99.99% pure gallium and 99.995% % pure indium, le...

Embodiment 2

[0029] The chemical composition (mass fraction) of the easily corroded aluminum alloy: 7.0% Zn, 5.0% Mg, 5% Ga, 2% In, 0.1% Sn, 0.1% Fe, 0.1% Mn, and the rest is Al.

[0030] Preparation method of easily corroded aluminum alloy:

[0031] 1) According to the mass percentage content of each element in the aluminum alloy material, configure 99.7% pure aluminum, 99.9% pure zinc, 99.8% pure magnesium, 99.8% pure tin, 99.99% pure gallium, 99.995% pure indium, Al-20 %Fe master alloy and Al-10%Mn master alloy.

[0032] 2) First, heat up and melt 99.7% pure aluminum, Al-20% Fe master alloy and Al-10% Mn master alloy; adjust the temperature of the aluminum alloy melt to 750°C, use high-purity nitrogen for refining and degassing, and the refining is completed After removing slag; add 99.9% pure zinc, 99.8% pure magnesium, 99.8% pure tin, 99.99% pure gallium and 99.995% pure indium, let it stand for 20 minutes, check the composition of the alloy, and pour it after the composition is qual...

Embodiment 3

[0037] Chemical composition (mass fraction) of easily corroded aluminum alloy: 5.0% Zn, 3.5% Mg, 3% Ga, 1% In, 0.1% Sn, 0.1% Fe, 0.1% Mn, and the rest is Al.

[0038] Preparation method of easily corroded aluminum alloy:

[0039] 1) According to the mass percentage content of each element in the aluminum alloy material, configure 99.7% pure aluminum, 99.9% pure zinc, 99.8% pure magnesium, 99.8% pure tin, 99.99% pure gallium, 99.995% pure indium, Al-20 %Fe master alloy and Al-10%Mn master alloy.

[0040] 2) First, heat up and melt 99.7% pure aluminum, Al-20% Fe master alloy and Al-10% Mn master alloy; adjust the temperature of the aluminum alloy melt to 740°C, and use 0.6% hexachloroethane for refining and degassing After refining, remove slag; add 99.9% pure zinc, 99.8% pure magnesium, 99.8% pure tin, 99.99% pure gallium and 99.995% pure indium, let it stand for 20 minutes, check the alloy composition, and pour it after the composition is qualified.

[0041] 3) Sand casting,...

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Abstract

The invention discloses an easy-to-corrode aluminum alloy material and a preparation method thereof. The aluminum alloy material comprises the following elements in percentage by mass: 3%-7% of Zn, 2%-5% of Mg, 0.5%-5% of Ga, 0.3%-2% of In, 0.1%-0.5% of Sn, 0.1%-1% of Fe, 0.1%-0.5% of Mn and the balance of Al. The preparation method comprises the steps that materials are prepared according to ratios; firstly, pure Al, Al-20%Fe intermediate alloy and Al-10%Mn intermediate alloy are heated and molten; the temperature is adjusted to 740+ / -10 DEG C, and refining and purifying are performed; pure Zn, pure Mg, pure Sn, pure Ga and pure In are added in, and then the mixture stands for more than 20 min; the composition of the alloy is detected, and the alloy is to be poured after the composition is detected to be qualified; a squeeze casting technology is adopted for casting; the pouring temperature is 710+ / -10 DEG C; the mould temperature is 250-350 DEG C; the pressure intensity is 80-180 MPa; and the pressure holding time is 1-2 min. The composition proportion of the aluminum alloy is scientific and reasonable; the preparation process is simple; a high corrosion rate can be achieved in a neutral medium; and requirements of a blocking function for different time periods for an oil and gas well can be met.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an easily corroded aluminum alloy material and a preparation method thereof. Background technique [0002] In the exploitation of oil and shale gas, oil and gas wells often need to be sealed, and the plugging objects must be easy to remove in addition to their sealing function. In 2014, the United States invented the soluble bridge plug technology, which uses the corrosion of metal in fracturing fluid to ensure the plugging function within a certain period of time, and the metal corrosion disappears after a certain period of time. [0003] A dense passivation film will be formed on the surface of aluminum in a neutral medium, resulting in aluminum passivation and not easy to corrode. Generally, the above problems can be solved by adding active elements such as zinc and indium to aluminum. GB / T4948-2002 announced several corrosion-prone aluminum alloy materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06C22C21/06
CPCC22C1/026C22C1/03C22C1/06C22C21/06C22C21/10
Inventor 朱秀荣陈大辉施虹霞任政周灵展费良军侯林冲
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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