阅读说明：本技术 一种高防锈铝合金及其制备方法 (High-rust-resistance aluminum alloy and preparation method thereof ) 是由 蓝朝兴 于 2020-11-16 设计创作，主要内容包括：本发明公开了一种高防锈铝合金及其制备方法。本发明通过优化Al、Mg、Ti主合金元素,添加Mn、Fe、Si、Zn、Ni、Ga、Pb、Zr、V、B、Cr、Cu、Bi、Ca、Ce、Co、Cd、Na、Sn、Sr、Li、Ag、Be、La元素,科学调控各组分的含量,通过各组分的相互协调配合,制备得到的铝合金具有优良的防锈性能,能有效的防止铝合金氧化生锈,铸造性能好、容易压铸成型,可以加工成各种形状的物件。(The invention discloses a high-rust-resistance aluminum alloy and a preparation method thereof. According to the invention, by optimizing main alloy elements of Al, Mg and Ti, adding Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La elements, scientifically regulating and controlling the content of each component, and through the mutual coordination of each component, the prepared aluminum alloy has excellent antirust performance, can effectively prevent the aluminum alloy from being oxidized and rusted, has good casting performance, is easy to Be die-cast and molded, and can Be processed into objects in various shapes.)

1. The high-rust-resistance aluminum alloy is characterized by comprising the following components in percentage by mass: 5 to 8 percent of Mg, 0.1 to 0.2 percent of Ti, 0.5 to 1 percent of Mn, 0.1 to 0.3 percent of Fe, 0.03 to 0.1 percent of Si, 0.01 to 0.05 percent of Zn, 0.008 to 0.02 percent of Ni, 0.01 to 0.03 percent of Ga, 0.008 to 0.02 percent of Pb, 0.01 to 0.03 percent of Zr, 0.008 to 0.02 percent of V, 0.004 to 0.008 percent of B, 0.004 to 0.01 percent of Cr, 0.0008 to 0.0015 percent of Cu, 0.001 to 0.002 percent of Bi, 0.001 to 0.006 percent of Ca, 0.001 to 0.002 percent of Ce, 0.002 to 0.008 percent of Co, 0.0008 to 0.002 percent of Cd, 0.002 to 0.006 percent of Na, 0.004 to 0.01 percent of Sn, 0.0008 to 0.002 percent of Sr, 0.0001 to 0.0005 percent of Li, 0.0005 to 0.001 percent of Ag, 0.0005 to 0.001 percent of Be, 0.0002 percent of Al and the balance of Al.

2. The high antirust aluminum alloy as set forth in claim 1, wherein the components and the mass percentages of the components are as follows: 6-7% of Mg, 0.1-0.16% of Ti, 0.6-0.8% of Mn, 0.18-0.25% of Fe, 0.05-0.08% of Si, 0.02-0.04% of Zn, 0.009-0.02% of Ni, 0.02-0.03% of Ga, 0.009-0.02% of Pb, 0.01-0.025% of Zr, 0.008-0.018% of V, 0.005-0.007% of B, 0.006-0.01% of Cr, 0.001-0.0015% of Cu, 0.001-0.002% of Bi, 0.002-0.005% of Ca, 0.001-0.002% of Ce, 0.004-0.0078% of Co, 0.0008-0.002% of Cd, 0.003-0.005% of Na, 0.006-0.01% of Sn, 0.0008-0.0008% of Sr, 0.0001-0.002% of Li, 0.0001-0.0001% of Ag, 0.0005-0.0001%, 0.0007.0007% of Be, and the balance of Al.

3. The high antirust aluminum alloy as set forth in claim 1, wherein the components and the mass percentages of the components are as follows: mg 6.55%, Ti 0.15%, Mn 0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga 0.0214%, Pb 0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu 0.0011%, Bi 0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be 0.00092%, La 0.00086%, and the balance of Al.

4. The method for producing a highly rust-preventive aluminum alloy as claimed in any one of claims 1 to 3, characterized by comprising the steps of:

melting: selecting raw materials according to the composition and mass percentage of the high-rust-proof aluminum alloy, firstly putting a pure aluminum ingot into a smelting furnace for melting, and then adding alloy elements of Mg, Ti, Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La into the smelting furnace for melting to obtain a melt;

refining: refining the melt, slagging off and standing;

die casting: and (5) standing and then performing die-casting molding.

5. The method for preparing the highly antirust aluminum alloy as claimed in claim 4, wherein the pure aluminum ingot is placed into a furnace to be melted at 680-700 ℃.

Technical Field

The invention relates to the field of aluminum alloy, in particular to a high-rust-resistance aluminum alloy and a preparation method thereof.

Background

The aluminum alloy is composed of aluminum as a matrix element, has low density, high strength close to or exceeding that of high-quality steel, good plasticity, can be processed into various objects, has excellent electrical conductivity, thermal conductivity and corrosion resistance, is a non-ferrous metal material most widely applied to aviation, aerospace, automobile, mechanical manufacturing, ships and chemical industry, and is second to steel in use amount.

The content of aluminum in most aluminum alloys is not more than 90%, and other metals in the aluminum alloys easily cause the aluminum alloys to generate rusty spots, so that the appearance and the function are influenced, the service life is also influenced, and resource waste is possibly caused.

In order to overcome the above problems, some solutions have been given in the prior art.

Chinese patent CN201210462399.6 discloses an antirust aluminum alloy formula, which comprises the following components in percentage by mass: less than or equal to 0.5 percent of iron, less than or equal to 0.3 percent of silicon, less than or equal to 0.15 percent of copper, less than or equal to 1.25 percent of manganese, less than or equal to 0.55 percent of magnesium, less than or equal to 0.04 percent of titanium, less than or equal to 0.1 percent of chromium, and the balance of aluminum. The scheme allows less than or equal to 0.5 percent of impurities. The disadvantage is that the economic cost is high and the mass production is difficult.

The Chinese patent CN201310376251.5 is an antirust aluminum alloy formula, and the antirust aluminum alloy comprises the following elements in percentage by mass: 40-60% of aluminum, 5-10% of iron, 1-5% of silicon, 1-3% of copper and 1-3% of manganese. The antirust aluminum alloy provided by the invention improves the high-temperature strength of the aluminum alloy and increases the corrosion resistance.

Chinese patent CN201410140057.1 discloses a formula of an antirust aluminum alloy for automobiles, which comprises the following elements in percentage by mass: and (C) Sc: 0.01-0.02%, Zr: 0.02-0.03%, Y: 0.02-0.04%, V: 0.1-0.25%, Si 02: 0.2-0.4%, Be: 0.01-0.02%, La: 0.02-0.03%, Er: 0.03-0.05%, W: 0.1-0.2%, Cu: 0.1-0.2%, Gd: 0.01-0.02%, and the balance of Al and impurities.

Chinese patent CN201510517666.9 discloses a high-strength antirust aluminum alloy for automobile engines and a preparation method thereof, wherein the high-strength antirust aluminum alloy comprises the following chemical components in percentage by mass: 0.52% of Fe, Si: 0.32%, Cu: 0.15%, Mn 1.55%, Mg 0.65%, Ti 0.04%, Cr 0.1%, and the balance aluminum, with the allowance of impurities below 0.05%.

However, in the process of implementing the embodiments of the present application, the inventors of the present application found that the above-mentioned technology has at least the following technical problems: (1) the rust resistance of the aluminum alloy is yet to be improved; (2) the existing antirust aluminum alloy has poor die-casting forming performance and is difficult to die-cast and form.

Disclosure of Invention

The invention mainly aims to provide a high-rust-resistance aluminum alloy and a preparation method thereof, and solves the problems that the existing rust-resistance aluminum alloy is poor in rust resistance and casting performance and is not easy to die-cast and form.

The technical problem to be solved by the invention is realized by the following technical scheme:

in one aspect of the invention, the invention provides a high-rust-resistance aluminum alloy which comprises the following components in percentage by mass: 5 to 8 percent of Mg, 0.1 to 0.2 percent of Ti, 0.5 to 1 percent of Mn, 0.1 to 0.3 percent of Fe, 0.03 to 0.1 percent of Si, 0.01 to 0.05 percent of Zn, 0.008 to 0.02 percent of Ni, 0.01 to 0.03 percent of Ga, 0.008 to 0.02 percent of Pb, 0.01 to 0.03 percent of Zr, 0.008 to 0.02 percent of V, 0.004 to 0.008 percent of B, 0.004 to 0.01 percent of Cr, 0.0008 to 0.0015 percent of Cu, 0.001 to 0.002 percent of Bi0.001 to 0.006 percent of Ca, 0.001 to 0.006 percent of Ce, 0.002 to 0.008 percent of Co, 0.0008 to 0.002 percent of Cd0.0008, 0.002 to 0.006 percent of Na, 0.004 to 0.01 percent of Sn, 0.0008 to 0.002 percent of Sr, 0.0001 to 0.0005 percent of Li0.0005 to 0.001 percent of Ag, 0.0005 to 0.001 percent of Be, and the balance of Al.

Optionally, the components and the mass percentages of the components are as follows: 6 to 7 percent of Mg, 0.1 to 0.16 percent of Ti, 0.6 to 0.8 percent of Mn0.18 to 0.25 percent of Fe, 0.05 to 0.08 percent of Si, 0.02 to 0.04 percent of Zn, 0.009 to 0.02 percent of Ni, 0.02 to 0.03 percent of Ga, 0.009 to 0.02 percent of Pb, 0.01 to 0.025 percent of Zr, 0.008 to 0.018 percent of V, 0.005 to 0.007 percent of B, 0.006 to 0.01 percent of Cr, 0.001 to 0.0015 percent of Cu, 0.001 to 0.002 percent of Bi, 0.002 to 0.005 percent of Ca0.001 to 0.002 percent of Ce, 0.004 to 0.0078 percent of Co, 0.0008 to 0.002 percent of Cd, 0.003 to 0.005 percent of Na0.006 to 0.01 percent of Sn, 0.0008 to 0.0001 percent of Sr, 0.0001 to 0.002 percent of Li, 0.0001 to 0.001 percent of Ag0.0005 to 0.001 percent, 0.0007 percent of Be, and the balance of Al.

Optionally, the components and the mass percentages of the components are as follows: mg 6.55%, Ti 0.15%, Mn0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga 0.0214%, Pb0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu 0.0011%, Bi0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be 0.00092%, La0.00086%, and the balance of Al.

In another aspect of the present invention, the present invention provides a method for preparing a highly antirust aluminum alloy, comprising the following steps:

melting: selecting raw materials according to the composition and mass percentage of the high-rust-proof aluminum alloy, firstly putting a pure aluminum ingot into a smelting furnace for melting, and then adding alloy elements of Mg, Ti, Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La into the smelting furnace for melting to obtain a melt;

refining: refining the melt, slagging off and standing;

die casting: and (5) standing and then performing die-casting molding.

Alternatively, pure aluminum ingots were placed in a furnace to melt at 680-700 ℃.

The invention has the following beneficial effects:

according to the invention, by optimizing main alloy elements of Al, Mg and Ti, adding Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La elements, scientifically regulating and controlling the content of each component, and through the mutual coordination of each component, the prepared aluminum alloy has excellent antirust performance, can effectively prevent the aluminum alloy from being oxidized and rusted, has good casting performance, is easy to Be die-cast and molded, and can Be processed into objects in various shapes.

The invention changes the components of the aluminum alloy, so that the aluminum alloy is not rusted, the service life is greatly prolonged, and the method is simple, low in cost and easy to process.

Detailed Description

The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.

Unless otherwise defined, terms used in the present specification have the same meaning as those generally understood by those skilled in the art, but in case of conflict, the definitions in the present specification shall control.

The use of "including," "comprising," "containing," "having," or other variations thereof herein, is meant to encompass the non-exclusive inclusion, as such terms are not to be construed. The term "comprising" means that other steps and ingredients can be added that do not affect the end result. The term "comprising" also includes the terms "consisting of …" and "consisting essentially of …". The compositions and methods/processes of the present invention comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein.

All numbers or expressions referring to quantities of ingredients, process conditions, etc. used in the specification and claims are to be understood as modified in all instances by the term "about". All ranges directed to the same component or property are inclusive of the endpoints, and independently combinable. Because these ranges are continuous, they include every value between the minimum and maximum values. It should also be understood that any numerical range recited herein is intended to include all sub-ranges within that range.

As described in the background art, the rust-proof aluminum alloy in the prior art has the problems that the rust-proof performance is still to be improved, the die-casting forming performance is poor, and the die-casting forming is difficult to realize. In order to solve the technical problems, the invention provides a high-rust-resistance aluminum alloy and a preparation method thereof.

In a first aspect, the high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 5-8%, Ti 0.1-0.2%, Mn 0.5-1%, Fe 0.1-0.3%, Si 0.03-0.1%, Zn 0.01-0.05%, Ni 0.008-0.02%, Ga 0.01-0.03%, Pb 0.008-0.02%, Zr 0.01-0.03%, V0.008-0.02%, B0.004-0.008%, Cr 0.004-0.01%, Cu 0.0008-0.0015%, Bi0.001-0.002%, Ca 0.001-0.006%, Ce 0.001-0.002%, Co 0.002-0.008%, Cd0.0008-0.002%, Na 0.002-0.006%, Sn 0.004-0.01%, Sr 0.0008-0.0008%, Li0.0001-0.0001%, Ag 0.0005-0.001%, Be 0.0002.001-0.0002%, and Al 0.0005-0.001%.

Preferably, the components and the mass percentage of each component are as follows: 6 to 7 percent of Mg, 0.1 to 0.16 percent of Ti, 0.6 to 0.8 percent of Mn0.18 to 0.25 percent of Fe, 0.05 to 0.08 percent of Si, 0.02 to 0.04 percent of Zn, 0.009 to 0.02 percent of Ni, 0.02 to 0.03 percent of Ga, 0.009 to 0.02 percent of Pb, 0.01 to 0.025 percent of Zr, 0.008 to 0.018 percent of V, 0.005 to 0.007 percent of B, 0.006 to 0.01 percent of Cr, 0.001 to 0.0015 percent of Cu, 0.001 to 0.002 percent of Bi, 0.002 to 0.005 percent of Ca0.001 to 0.002 percent of Ce, 0.004 to 0.0078 percent of Co, 0.0008 to 0.002 percent of Cd, 0.003 to 0.005 percent of Na0.006 to 0.01 percent of Sn, 0.0008 to 0.0001 percent of Sr, 0.0001 to 0.002 percent of Li, 0.0001 to 0.001 percent of Ag0.0005 to 0.001 percent, 0.0007 percent of Be, and the balance of Al.

More preferably, the components and the mass percentages of the components are as follows: mg 6.55%, Ti 0.15%, Mn0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga 0.0214%, Pb0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu 0.0011%, Bi0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be 0.00092%, La0.00086%, and the balance of Al.

According to the invention, by optimizing main alloy elements of Al, Mg and Ti, adding elements of Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La, scientifically regulating and controlling the content of each component, and through the mutual coordination and coordination of each component, the prepared aluminum alloy has excellent antirust performance and good casting performance, is easy to Be die-cast and molded, and can Be processed into objects in various shapes.

The high-antirust aluminum alloy has excellent mechanical properties, the tensile strength reaches 560MPa, the yield strength reaches 520MPa, and the elongation reaches 16%.

The effects of the elements of the high-toughness squeeze casting aluminum-silicon alloy of the present invention are further described below:

the Mg element increases the corrosion resistance and tensile strength of the alloy and also greatly improves the mechanical processing property of the alloy; ti element is mainly refined grains, so that the strength and the plasticity of the alloy are improved, and thermal fracture is prevented; mn element can effectively increase the corrosion resistance, strength, hardness and wear resistance of the alloy; fe element can properly increase the corrosion resistance and toughness of the alloy, improve the strength and wear resistance of the aluminum alloy and increase the fluidity; si element silicon can improve the casting performance, corrosion resistance and wear resistance of the aluminum alloy, increase the fluidity, tensile strength and hardness of the aluminum alloy and reduce the elongation of the material; zn improves the casting fluidity of the alloy, reduces the hot cracking tendency and enhances the strength of the aluminum alloy; ni element is used to increase the resistance of aluminum alloys to corrosion and oxidation; zr element can refine crystal grains, improve casting fluidity and structure uniformity, and improve strength and plasticity; the V element can improve the tensile strength and the yield point and obviously improve the strength of metal; the B element increases the hardness and tensile strength of the metal; cr element can refine crystal grains, improve heat resistance, increase tensile strength, increase corrosion resistance and heat resistance of metal and the like; the Cu element can improve the high-temperature strength of the aluminum alloy, is beneficial to ensuring that the alloy has the performance of resisting atmospheric corrosion and can improve the strength and the toughness; the Bi element can obviously improve the machining performance and the wear resistance of the aluminum alloy material; the Ce element can eliminate or weaken the influence of a plurality of harmful elements in the metal, improve the quality of the metal, improve the hot working performance of the metal and improve the plasticity and the toughness of the metal; co element can improve and improve the high temperature performance of metal, increase the hardness of the metal, and improve the oxidation resistance, corrosion resistance and the like of the metal.

It should be noted that, although the composition in the present invention is a conventional composition in the aluminum alloy in terms of cracking, the compositions have logical relationship, which depend on and affect each other, and the compositions are interdependent and difficult-to-separate organic whole, which is not the result of the action of a single composition, but the result of the interaction of the compositions, and a small adjustment of any factor may cause a great change in the properties of the final aluminum alloy.

In a second aspect, a method for preparing the highly antirust aluminum alloy in the first aspect is provided, which comprises the following steps:

melting: selecting raw materials according to the composition and mass percentage of the high-rust-proof aluminum alloy, firstly putting a pure aluminum ingot into a smelting furnace for melting, and then adding alloy elements of Mg, Ti, Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La into the smelting furnace for melting to obtain a melt;

refining: refining the melt, slagging off and standing;

die casting: and (5) standing and then performing die-casting molding.

Wherein, the pure aluminum ingot is put into a furnace to be melted at 680-700 ℃.

The invention changes the components of the aluminum alloy, so that the aluminum alloy is not rusted, the service life is greatly prolonged, and the method is simple, low in cost and easy to process.

In order to better understand the technical solutions, the technical solutions will be described in detail with reference to specific examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.

Example 1

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 6.55%, Ti0.15%, Mn 0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga0.0214%, Pb 0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu0.0011%, Bi 0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be0.00092%, La 0.00086%, and the balance of Al.

Example 2

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 6%, Ti 0.1%, Mn 0.6%, Fe 0.18%, Si 0.05%, Zn 0.02%, Ni 0.009%, Ga 0.02%, Pb 0.009%, Zr 0.01%, V0.008%, B0.005%, Cr 0.006%, Cu 0.001%, Bi 0.001%, Ca 0.002%, Ce 0.001%, Co 0.004%, Cd 0.0008%, Na 0.003%, Sn 0.006%, Sr 0.0008%, Li 0.0001%, Ag 0.0001%, Be 0.0007%, La 0.0006%, and the balance of Al.

Example 3

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 7%, Ti 0.1%, Mn 1%, Fe 0.25%, Si 0.03%, Zn 0.05%, Ni 0.02%, Ga 0.02%, Pb 0.02%, Zr 0.025%, V0.018%, B0.007%, Cr 0.01%, Cu 0.0015%, Bi 0.002%, Ca 0.005%, Ce 0.002%, Co 0.0078%, Cd 0.002%, Na 0.005%, Sn 0.01%, Sr 0.002%, Li0.0005%, Ag 0.0005%, Be 0.001%, La 0.001%, and the balance of Al.

Example 4

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: 5% of Mg, 0.1% of Ti, 0.5% of Mn, 0.1% of Fe, 0.03% of Si, 0.01% of Zn, 0.008% of Ni, 0.01% of Ga, 0.008% of Pb, 0.01% of Zr, 0.008% of V, 0.004% of B, 0.004% of Cr, 0.0008% of Cu, 0.001% of Bi, 0.001% of Ca, 0.001% of Ce, 0.002% of Co, 0.0008% of Cd, 0.002% of Na, 0.004% of Sn, 0.0008% of Sr, 0.0001% of Li, 0.0001% of Ag, 0.0002% of Be, 0.0002% of La and the balance of Al.

Example 5

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 8%, Ti 0.2%, Mn 1%, Fe 0.3%, Si 0.1%, Zn 0.05%, Ni 0.02%, Ga 0.03%, Pb 0.02%, Zr 0.03%, V0.02%, B0.008%, Cr 0.01%, Cu 0.0015%, Bi-0.002%, Ca 0.006%, Ce 0.002%, Co 0.008%, Cd 0.002%, Na 0.006%, Sn 0.01%, Sr 0.002%, Li 0.0005%, Ag0.0005%, Be 0.001%, La 0.001%, and the balance of Al.

Comparative example 1

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 4%, Ti 0.15%, Mn 0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga 0.0214%, Pb 0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu 0.0011%, Bi 0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be 0.00092%, La0.00086%, and the balance of Al.

Comparative example 2

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 9%, Ti 0.15%, Mn 0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga 0.0214%, Pb 0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu 0.0011%, Bi 0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be 0.00092%, La0.00086%, and the balance of Al.

Comparative example 3

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 6.55%, Ti0.05%, Mn 0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga0.0214%, Pb 0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu0.0011%, Bi 0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be0.00092%, La 0.00086%, and the balance of Al.

Comparative example 4

The high-rust-resistance aluminum alloy comprises the following components in percentage by mass: mg 6.55%, Ti0.3%, Mn 0.712%, Fe 0.221%, Si 0.0767%, Zn 0.03%, Ni 0.0107%, Ga 0.0214%, Pb 0.0188%, Zr 0.0269%, V0.0169%, B0.006%, Cr 0.0088%, Cu 0.0011%, Bi 0.0014%, Ca 0.0045%, Ce 0.0015%, Co 0.0064%, Cd 0.001%, Na 0.0046%, Sn 0.0083%, Sr 0.0012%, Li 0.00038%, Ag 0.00032%, Be 0.00092%, La0.00086%, and the balance of Al.

In order to verify the performance of the product of the present invention, the rust inhibitive effect of the aluminum alloys prepared in examples 1 to 5 and comparative examples 1 to 4 was tested, and the test results are shown in Table 1.

Salt spray test: referring to SH/T0081 standard, an aluminum alloy test piece is heated to 35 ℃ in a salt spray box, then is kept at the constant temperature for 8 hours, is naturally cooled to room temperature, and is kept stand for 16 hours to form a test period (d) and a test 2 d.

And (3) a damp-heat test: according to the GB/T2361-80 standard, the test piece is heated to 49 +/-1 ℃ in a damp-heat test box, the rotating speed of a test piece frame is 0.33 +/-0.01 r/min, the test piece frame continuously runs for 8 hours, the test is stopped, and the test period (d) is 16 hours after standing, and the test period (d) is 15 days.

The test pieces were rated according to SH/T0533.

	Salt fog	Damp-heat
			Example 1	Level 1	Level 1
Example 2	Level 1	Level 1
			Example 3	Level 1	Level 1
Example 4	Level 1	Level 1
			Example 5	Level 1	Level 1
Comparative example 1	Stage 2	Level 1
			Comparative example 2	Stage 2	Stage 2
Comparative example 3	Level 1	Stage 2
			Comparative example 4	Stage 2	Grade 3

According to the test, the aluminum alloy prepared by optimizing main alloy elements of Al, Mg and Ti, adding elements of Mn, Fe, Si, Zn, Ni, Ga, Pb, Zr, V, B, Cr, Cu, Bi, Ca, Ce, Co, Cd, Na, Sn, Sr, Li, Ag, Be and La has excellent antirust performance and can effectively prevent the aluminum alloy from being oxidized and rusted.

The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.