CN115071223B - Preparation method and application of porous aluminum alloy plate - Google Patents
Preparation method and application of porous aluminum alloy plate Download PDFInfo
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- CN115071223B CN115071223B CN202210752617.3A CN202210752617A CN115071223B CN 115071223 B CN115071223 B CN 115071223B CN 202210752617 A CN202210752617 A CN 202210752617A CN 115071223 B CN115071223 B CN 115071223B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 144
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000000748 compression moulding Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000007480 spreading Effects 0.000 claims description 22
- 238000003892 spreading Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 235000021190 leftovers Nutrition 0.000 claims description 12
- 238000000265 homogenisation Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/16—Electrodes characterised by the combination of the structure and the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a preparation method and application of a porous aluminum alloy plate, and belongs to the technical field of anti-corrosion materials. According to the invention, an aluminum alloy net is used as an outer layer material, aluminum alloy scraps are used as fillers, and compression molding is performed in a mold; finally, heating and homogenizing to obtain the porous aluminum alloy plate. The invention reuses the waste scraps generated in the process of manufacturing the aluminum alloy section, and forms a multi-layer aluminum alloy plate by taking the aluminum alloy net as a barrier layer. The aluminum alloy sheet produced can be used as a sacrificial anode. Compared with the existing method for treating the aluminum alloy scraps, the method does not need to carry out melting purification on the waste aluminum alloy again, and the recovery method is simple and reasonable.
Description
Technical Field
The invention belongs to the technical field of anti-corrosion materials, and particularly relates to a preparation method and application of a porous aluminum alloy plate.
Background
Aluminum alloys have been widely used in various industries because of their low density, good heat and electrical conductivity, good corrosion resistance, and good plasticity. A large amount of waste scraps are generated in the manufacturing process of the aluminum alloy section. Most of the scraps are aluminum alloy scraps and unusable scraps. The traditional way of treating the aluminum alloy offcuts is to re-melt, clean, and then re-ingot after collection. If these offcuts are used further, the manufacturing cost can be reduced.
Disclosure of Invention
Aiming at the problem that waste aluminum alloy scraps cannot be reasonably utilized in the prior art, the invention provides a preparation method and application of a porous aluminum alloy plate, and aims to solve the technical problems.
The technical scheme of the invention is as follows:
a preparation method of a porous aluminum alloy plate uses an aluminum alloy net as an outer layer material, and aluminum alloy leftovers as fillers, and the aluminum alloy net is formed in a mold by compression; finally, heating and homogenizing to obtain the porous aluminum alloy plate.
The method specifically comprises the following steps:
(1) Taking an aluminum alloy net and placing the aluminum alloy net in a die; wherein the length and the width of the aluminum alloy net are equal to the length and the width of the die; if the length and the width of the aluminum alloy net are longer than those of the die, the aluminum alloy net needs to be cut into the same length as the die so as to cover the bottom of the die; if the length and width of the aluminum alloy net are shorter than those of the mould, the mode of splicing and stacking is selected to cover the bottom of the mould.
(2) Uniformly spreading the aluminum alloy scraps on an aluminum alloy net, and after spreading, paving a second layer of aluminum alloy net above the aluminum alloy scraps; the laying method of the aluminum alloy net is the same as the step (1).
(3) Compression molding in a mold.
(4) And carrying out heating homogenization treatment on the compression-molded sample to obtain the porous aluminum alloy plate.
Preferably, the aluminum alloy scraps comprise scraps and leftovers of milling in the processing of the aluminum alloy section.
Preferably, the aperture of the aluminum alloy net is less than or equal to 1mm.
Preferably, after the compression in the step (3), the aluminum alloy scraps and the third aluminum alloy net can be continuously paved on the second aluminum alloy net and then subjected to compression treatment. And the like, a plurality of layers of aluminum alloy offcuts and aluminum alloy nets can be paved.
Preferably, the porosity of the compressed sample is less than or equal to 50%.
Preferably, the step (4) is: and (3) heating the sample subjected to compression molding in the step (3) to 430-490 ℃ for homogenization, and obtaining the porous aluminum alloy plate after homogenization. Because the aluminum alloy scraps are irregularly shaped and have different sizes, a large number of gaps can be formed after compression. By heating to homogenize, migration of the surface species of the compressed aluminum alloy begins and the aluminum alloy contacts the interface, forming a sintered neck after contact. The larger pores formed during compression molding become smaller gradually by heating and homogenizing, and then are converted into small pores, so that the compressive strength of the porous aluminum alloy plate is obviously improved, and the porous aluminum alloy plate still has larger specific surface area.
The temperature of heating homogenization cannot be too high, and once the temperature is too high, the metal in the metal bath is melted, so that the formed pores disappear, and the specific surface area is greatly reduced.
The porous aluminum alloy plate prepared by the invention can be used as a sacrificial anode.
The sacrificial anode is used for protecting a submarine oil pipeline.
The beneficial effects of the invention are as follows:
the invention reuses the waste scraps generated in the process of manufacturing the aluminum alloy section, and forms a multi-layer aluminum alloy plate by taking the aluminum alloy net as a barrier layer. The aluminum alloy sheet produced can be used as a sacrificial anode. Compared with the existing method for treating the aluminum alloy scraps, the method does not need to carry out melting purification on the waste aluminum alloy again, and the recovery method is simple and reasonable.
Detailed Description
In order to better understand the technical solutions of the present invention, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Example 1
A preparation method of a porous aluminum alloy plate uses an aluminum alloy net as an outer layer material, and aluminum alloy leftovers as fillers, and the aluminum alloy net is formed in a mold by compression; finally, heating and homogenizing to obtain the porous aluminum alloy plate.
The method specifically comprises the following steps:
(1) The length, width and height of the die are 750mm, 135mm and 130mm respectively; placing an aluminum alloy net in a mold, and completely covering the bottom of the mold; wherein the aperture of the aluminum alloy net is 0.8mm;
(2) Uniformly spreading the aluminum alloy scraps on an aluminum alloy net, wherein the spreading height is about 120mm, and after spreading, spreading a second layer of aluminum alloy net above the aluminum alloy scraps to enable the aluminum alloy net to completely cover the spread aluminum alloy scraps;
the aluminum alloy offcuts comprise the following components: 96.3% of Al, 3.6% of Zn, 0.04% of In, 0.03% of Si, 0.02% of Fe and 0.01% of Cu.
(3) Compression molding in a mold; the porosity of the sample after compression is 40%;
(4) Heating the compression-molded sample to 430 ℃ for homogenization treatment, and cooling to obtain the porous aluminum alloy plate.
Example 2
A preparation method of a porous aluminum alloy plate uses an aluminum alloy net as an outer layer material, and aluminum alloy leftovers as fillers, and the aluminum alloy net is formed in a mold by compression; finally, heating and homogenizing to obtain the porous aluminum alloy plate.
The method specifically comprises the following steps:
(1) The length, width and height of the die are 750mm, 135mm and 130mm respectively; placing an aluminum alloy net in a mold, and completely covering the bottom of the mold; wherein the aperture of the aluminum alloy net is 1.0mm;
(2) Uniformly spreading the aluminum alloy scraps on an aluminum alloy net, wherein the spreading height is about 60mm, and after spreading, spreading a second layer of aluminum alloy net above the aluminum alloy scraps to enable the aluminum alloy net to completely cover the spread aluminum alloy scraps;
the aluminum alloy offcuts comprise the following components: 95.7% of Al, 4.2% of Zn, 0.04% of In, 0.03% of Si, 0.02% of Fe and 0.01% of Cu.
(3) Compressing in a mold;
(4) Spreading a layer of aluminum alloy leftovers on the sample compressed in the step (3), wherein the spreading height is about 60mm; after the spreading is completed, a third layer of aluminum alloy net is spread above the aluminum alloy leftovers, so that the aluminum alloy net completely covers the spread aluminum alloy leftovers;
(5) Compression molding in a mold; the porosity of the sample after compression is 50%;
(6) Heating the compression-molded sample to 450 ℃ for homogenization treatment, and cooling to obtain the porous aluminum alloy plate.
Example 3
A preparation method of a porous aluminum alloy plate uses an aluminum alloy net as an outer layer material, and aluminum alloy leftovers as fillers, and the aluminum alloy net is formed in a mold by compression; finally, heating and homogenizing to obtain the porous aluminum alloy plate.
The method specifically comprises the following steps:
(1) The length, width and height of the die are 750mm, 135mm and 130mm respectively; placing an aluminum alloy net in a mold, and completely covering the bottom of the mold; wherein the aperture of the aluminum alloy net is 1.0mm;
(2) Uniformly spreading the aluminum alloy scraps on an aluminum alloy net, wherein the spreading height is about 40mm, and after spreading, spreading a second layer of aluminum alloy net above the aluminum alloy scraps to enable the aluminum alloy net to completely cover the spread aluminum alloy scraps;
the aluminum alloy offcuts comprise the following components: 95.9% of Al, 4.0% of Zn, 0.04% of In, 0.02% of Si, 0.03% of Fe and 0.01% of Cu.
(3) Compressing in a mold; the porosity of the sample after compression is 50%;
(4) Spreading a layer of aluminum alloy leftovers on the sample compressed in the step (3), wherein the spreading height is about 40mm; after the spreading is completed, a third layer of aluminum alloy net is spread above the aluminum alloy leftovers, so that the aluminum alloy net completely covers the spread aluminum alloy leftovers; repeating the step (3) and the step (4) once again;
(5) Compression molding in a mold;
(6) Heating the compression-molded sample to 490 ℃ for homogenization treatment, and cooling to obtain the porous aluminum alloy plate.
Test case
The porous aluminum alloy plates prepared in examples 1 to 3 were subjected to related detection as sacrificial anodes, and the test method was referred to GB/T17848-1999 "sacrificial anode electrochemical Performance test method". The comparative example used a typical Al-Zn-In sacrificial electrode with the following composition: 95.2% of Al, 4.7% of Zn, 0.03% of In, 0.03% of Fe, 0.01% of Cu and 0.03% of Si. The test results are shown in Table 1 below:
TABLE 1 detection results
| Example 1 | Example 2 | Example 3 | Comparative example | |
| Open circuit potential (V) | -1.098 | -1.084 | -1.106 | -0.884 |
| Working potential (V) | -1.121 | -1.124 | -1.128 | -0.821 |
| Actual capacitance(A·h/kg) | 2714 | 2708 | 2701 | 2633 |
As can be seen from the test results in Table 1, when the porous aluminum alloy plate prepared by the preparation method of the invention is used as a sacrificial anode, because irregular objects such as aluminum alloy scraps and the like are compressed and formed inside the aluminum alloy plate, the porous aluminum alloy plate has more gaps, and a porous and multi-gap structure is formed after homogenization, and the porous aluminum alloy plate has larger specific surface area, so that the effective working area of the anode is larger than that of the conventional sacrificial anode. With the increase of the surface area of the sacrificial anode, the current emitted by the anode is increased, the anode potential is reduced, and the cathode metal can be better protected.
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A preparation method of a porous aluminum alloy plate is characterized in that an aluminum alloy net is used as an outer layer material, aluminum alloy scraps are used as fillers, and compression molding is performed in a mold; finally, heating and homogenizing to obtain a porous aluminum alloy plate;
the method specifically comprises the following steps:
(1) Taking an aluminum alloy net and placing the aluminum alloy net in a die; wherein the length and the width of the aluminum alloy net are equal to the length and the width of the die; if the length and the width of the aluminum alloy net are longer than those of the die, the aluminum alloy net needs to be cut into the same length as the die so as to cover the bottom of the die; if the length and width of the aluminum alloy net are shorter than those of the die, a splicing and stacking mode is selected to cover the bottom of the die;
(2) Uniformly spreading the aluminum alloy scraps on an aluminum alloy net, and after spreading, paving a second layer of aluminum alloy net above the aluminum alloy scraps; the laying method of the aluminum alloy net is the same as the step (1);
(3) Compression molding in a mold;
(4) Heating and homogenizing the compression-molded sample to obtain a porous aluminum alloy plate;
after the compression in the step (3) is completed, continuously paving aluminum alloy scraps and a third aluminum alloy net on the second aluminum alloy net, and then carrying out compression treatment;
the step (4) is as follows: heating the sample compressed and formed in the step (3) to 430-490 ℃ for homogenization, and obtaining a porous aluminum alloy plate after homogenization;
the aluminum alloy scraps comprise scraps and leftovers of milling in aluminum alloy profile processing.
2. The method for producing a porous aluminum alloy sheet as set forth in claim 1, wherein said aluminum alloy net has a pore diameter of 1mm or less.
3. The method for producing a porous aluminum alloy sheet as set forth in claim 1, wherein the porosity of the sample after compression is 50% or less.
4. Use of a porous aluminum alloy sheet prepared using the preparation method of claim 1 as a sacrificial anode.
5. The use according to claim 4, wherein the sacrificial anode is used for protecting subsea oil pipelines.
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| CN202210752617.3A CN115071223B (en) | 2022-06-29 | 2022-06-29 | Preparation method and application of porous aluminum alloy plate |
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| CN115071223B true CN115071223B (en) | 2024-03-15 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990033148A (en) * | 1997-10-23 | 1999-05-15 | 김상동 | Multi-layered Porous Aluminum Powder Sintered Body with Wire Mesh Reinforcement and Manufacturing Method Thereof |
| JP2003295867A (en) * | 2002-02-01 | 2003-10-15 | Ngk Insulators Ltd | Sound absorption structure |
| CN201736482U (en) * | 2010-03-26 | 2011-02-09 | 杭州龙邦合金科技有限公司 | Composite foam aluminum particle board |
| CN103348518A (en) * | 2011-02-18 | 2013-10-09 | 住友电气工业株式会社 | Three-dimensional porous aluminum mesh, electrode using same, nonaqueous-electrolyte battery using said electrode, and capacitor and lithium-ion capacitor using nonaqueous liquid electrolyte |
| JP2015151609A (en) * | 2014-02-18 | 2015-08-24 | 三菱マテリアル株式会社 | Porous aluminum sintered body |
| CN110237599A (en) * | 2019-05-29 | 2019-09-17 | 西部宝德科技股份有限公司 | A kind of powder net composite material and its processing method |
| CN113621857A (en) * | 2021-10-11 | 2021-11-09 | 山东裕航特种合金装备有限公司 | Preparation method and application of aluminum alloy sacrificial anode |
-
2022
- 2022-06-29 CN CN202210752617.3A patent/CN115071223B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990033148A (en) * | 1997-10-23 | 1999-05-15 | 김상동 | Multi-layered Porous Aluminum Powder Sintered Body with Wire Mesh Reinforcement and Manufacturing Method Thereof |
| JP2003295867A (en) * | 2002-02-01 | 2003-10-15 | Ngk Insulators Ltd | Sound absorption structure |
| CN201736482U (en) * | 2010-03-26 | 2011-02-09 | 杭州龙邦合金科技有限公司 | Composite foam aluminum particle board |
| CN103348518A (en) * | 2011-02-18 | 2013-10-09 | 住友电气工业株式会社 | Three-dimensional porous aluminum mesh, electrode using same, nonaqueous-electrolyte battery using said electrode, and capacitor and lithium-ion capacitor using nonaqueous liquid electrolyte |
| JP2015151609A (en) * | 2014-02-18 | 2015-08-24 | 三菱マテリアル株式会社 | Porous aluminum sintered body |
| CN110237599A (en) * | 2019-05-29 | 2019-09-17 | 西部宝德科技股份有限公司 | A kind of powder net composite material and its processing method |
| CN113621857A (en) * | 2021-10-11 | 2021-11-09 | 山东裕航特种合金装备有限公司 | Preparation method and application of aluminum alloy sacrificial anode |
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