CN113512744A - Protection method of high-corrosion-resistance airborne aluminum-based LRM module - Google Patents
Protection method of high-corrosion-resistance airborne aluminum-based LRM module Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 230000004224 protection Effects 0.000 title claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 52
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 52
- 230000008569 process Effects 0.000 claims abstract description 34
- 230000007797 corrosion Effects 0.000 claims abstract description 27
- 238000005260 corrosion Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000010963 304 stainless steel Substances 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims 2
- 239000002253 acid Substances 0.000 claims 2
- 238000005406 washing Methods 0.000 claims 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 239000010452 phosphate Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 8
- 238000005554 pickling Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
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- 230000007774 longterm Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000010407 anodic oxide Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000011148 porous material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- -1 anodic oxidation Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Chemical class O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The protection method of the high-corrosion-resistance airborne aluminum-based LRM module disclosed by the invention is simple and convenient in process, strong in corrosion resistance and good in conductivity of a processed workpiece. The invention is realized by the following technical scheme: selecting a proper hanging mode and a proper hanging tool by combining the structure form of the LRM module part, mounting the LRM module part on the hanging tool in the oxidation process, removing oil stains and oxide skin on the surface of an LRM module product, putting the cleaned product into a PP/PVC tank natural color conductive oxidation liquid, carrying out oxidation treatment by matching with a phosphoric acid system of PH1-2, oxidizing for 4-6min at a low temperature of 20-30 ℃, putting the treated product into a sealing liquid for sealing, and curing for 30min at a temperature of 60 ℃; and finally, adhering an anti-static film on the surface of the LRM module part.
Description
Technical Field
The invention relates to a protection method of an airborne aluminum-based LRM module, which is particularly suitable for protecting the LRM module with electromagnetic shielding requirements on airborne integrated electronic equipment.
Background
With the development of modern airborne electronic technology, the function integration degree of module-integrated electronic equipment is higher and higher, the environmental adaptability requirement and the use performance requirement are more and more severe, but the requirement on the structural appearance is more and more compact, so that a higher-degree integrated structural form is required to meet the use requirement. In the past, a plurality of independent electronic equipment LRUs are replaced by a field replaceable module LRM with stronger function, complexity and smaller volume, a plurality of LRMs with the functions of quick plugging and pulling, safe locking, assembly without welding, complete modularization and the like are centrally installed in a modularized comprehensive integrated rack, and mutual signal interconnection is realized through an optical fiber transmission technology. The LRM module is a generic term for various general purpose units that are relatively independent in system installation structure and function, has standard size and interface, has built-in self-test function to locate and isolate faults to the LRM level, usually with a protective housing, and supports hot-plugging. The housing of the LRM module is provided with a guide rail groove, a guide pin groove and a locking groove; the corresponding frame is provided with a guide rail, a guide pin and a quick locking mechanism. There are no "open wires" in the LRM module and the mounting chassis, and all traces are inside the printed boards (motherboard and function board). The indicator light and the LRM plug on the module are printed, directly welded on the function board, and finally encapsulated by a shell and a cover plate. The LRM socket at the front end of the installation rack and the round socket (rear-mounted type) at the outer rear end of the installation rack are both in a printed board type, are respectively welded on the front and rear surfaces of a motherboard, and are finally packaged in the rack through a rack cover plate. At present, airborne electronic equipment is various, and characteristics such as operating frequency, consumption are diverse, and safeguard function is an important index requirement when airborne electronic equipment designs. The LRM module has complex functions and requires electromagnetic shielding performance, and the conventional aluminum anodic oxide film cannot meet the electromagnetic shielding performance requirement of products due to large surface resistance. In order to achieve a better appearance state and meet the electromagnetic shielding requirements of the module, natural color chemical oxidation treatment is generally adopted. Due to the fact that the LRM module is complex in function, the surface void ratio of the natural-color chemical oxide film is high, the film layer is thin, and the dirt resistance is poor, the natural-color chemical oxide film is easily polluted and scratched in the assembling, testing and environment testing processes, and therefore the appearance and long-term protection reliability of the product are affected. The use of equipment is buried with a relatively large risk.
The aluminum oxidation process is a generation and dissolution process, and an oxide film with good quality can be obtained only by determining certain process parameters such as temperature, time and the like. From the published papers and patent documents, there is almost no related technology for performing the natural color conductive oxidation protection on the whole process of the electronic equipment module, and most of the technical schemes are focused on the research of the natural color conductive oxidation formula without considering the protection in the production process of the actual product. Most of documents are related researches on the performance of a natural color conductive oxidation formula or a film layer, the natural color conductive oxidation formula mainly adopts chromic acid series, and the content of chromium of the natural color conductive oxidation formula influences the color of the film and the corrosion resistance of the film, so that the key point of obtaining the natural color conductive oxidation film with good protective performance is realized. The temperature of the natural color conductive oxidation is 30-35 ℃ usually, the time is 2-3 min, and with the increase of the number of processed workpieces, the service time is prolonged, the workpieces take away bath solution and other reasons, the effective components of the bath solution are reduced, so that the corrosion resistance of the natural color conductive oxide film on a subsequent product is reduced. The document disclosed in "Effectophoresis and chromophoresis of aluminum alloy 2024-T3" discloses the film characteristics and the protective mechanism of the chemical oxide film; the preparation and the performance of the chromium-free chemical conversion film on the surface of the aluminum alloy optimize the formula of the chemical oxidation film, ensure that the oxidation process is more environment-friendly, test the corrosion resistance of a film layer with a new formula, do not consider the protection of the whole machine of the product in the using process and the production process, and cannot solve the related problems of the product in the actual manufacturing and using processes.
The traditional aluminum part natural color conductive oxidation process cannot completely meet the use and process protection requirements of products. Since some properties of aluminum are not ideal, such as hardness, wear resistance and corrosion resistance, the conventional production needs to compensate for the above-mentioned weakness by surface treatment of aluminum, such as anodic oxidation, chemical oxidation or surface coating. While both the oxide film and the coating of aluminum have a certain resistance. In some special occasions and application fields, the requirement on the conductivity of the surface of a part is often provided. Aluminum and its alloys naturally form a very thin oxide film on their surfaces in air. (thickness is 0.01-0.05 mu.) this natural oxide film is amorphous, so that the surface of the product is originally glossy. Although the natural oxide film can prevent the aluminum and the aluminum alloy from being corroded continuously, the oxide film is loose, porous and uneven and has poor corrosion resistance and is easy to be stained with stains because the corrosion factors of all parts on the surface are inconsistent. The natural oxide film is not able to reliably prevent corrosion of aluminum and its alloys. The conductive oxidation temperature has great influence on the corrosion resistance of the oxide film, and the oxide film generated when the solution temperature is lower than 20 ℃ is thin, so that the protective capability is poor; when the temperature of the solution exceeds 35 ℃, the corrosion resistance of the oxide film is sharply reduced, and the solution reacts too fast, so that the generated oxide film is loose, the corrosion resistance is poor, and the film bonding force is poor. The rainbow-colored conductive oxide film formed by the aluminum material has poor surface color consistency, and the appearance of the product is influenced. The anodic oxide film has dual properties, large pores and uneven distribution, and is difficult to achieve a good corrosion prevention effect; when the sulfuric acid is anodized, a transparent protective film is difficult to generate, is mostly milk white, is greatly influenced by the surface state of the material, and is difficult to achieve an ideal appearance effect. The hard anodic oxidation has great limitation on the application range, and the workpiece with a slightly complex structure is not suitable for production at all. Improper hard oxidation treatment of aluminum alloy may cause uneven surface color and product ablation.
Disclosure of Invention
The invention mainly solves the problems of poor corrosion resistance of a natural color conductive oxide film layer and protection in the processes of assembly, debugging and environmental test of natural color conductive oxide products, improves the long-term reliability of electronic equipment, and provides the protection method of the LRM module of the airborne complex-structure electronic equipment, which has the advantages of simple and convenient process, strong corrosion resistance, good conductive performance of a processed workpiece, maintenance of the natural color of an aluminum piece and no corrosion to a matrix.
The technical scheme adopted by the invention is as follows: a protection method of a high corrosion resistance airborne aluminum-based LRM module is characterized by comprising the following steps: selecting a proper hanging mode and a proper hanging tool by combining the structure form of the LRM module part, installing the LRM module part on the hanging tool in the oxidation process, and fixing the LRM module part; putting the hung LRM module part into an oil-alkali removing solution for pretreatment, removing oil stains and oxide scales on the surface of an LRM module product, selecting a pickling solution according to the material of the LRM module part for pickling, wherein the antirust aluminum adopts sulfuric acid, hydrofluoric acid of a silicon-containing material is used for removing floating ash, loose substances and impurities on the surface of the product, cleaning the LRM module part with three-level flowing water, putting the cleaned product into a plastic tank, a PP/PVC tank or a 304 stainless steel tank natural color conductive oxidation solution, performing oxidation treatment by matching with a phosphoric acid system basic oxidation solution of PH1-2, oxidizing for 4-6min at a low temperature of 20-30 ℃, cleaning the oxidized LRM module part with three-level flowing water, putting the treated product into a sealing solution for sealing, and putting the product into an oven for film layer curing; after the natural color conductive oxidation treatment, a chemical treatment film layer which not only keeps the natural color of the aluminum product but also does not influence the surface conductivity is obtained on the LRM module part alloy part, and finally, an antistatic film is pasted on the large surface of the LRM module part.
Compared with the prior art, the invention has the beneficial effects that:
the process is simple and convenient. According to the invention, a proper hanging mode and a proper hanging tool are selected according to the structure condition of the LRM module, LRM module parts are installed on the hanging tool in the oxidation process, and the LRM module parts are fixed; the hung LRM module part is put into an oil-removing and alkaline etching solution for pretreatment, oil stains and oxide scales on the surface of a product are removed, then pickling solution is selected according to the material of the LRM module part for pickling, sulfuric acid is adopted as antirust aluminum, hydrofluoric acid is adopted as a silicon-containing material, floating ash, loose substances and impurities on the surface of the product are removed, the LRM module part is cleaned by three-level flowing water, the oxidizing capability is enhanced, the manufacturability is good, and a foundation is laid for improving the electromagnetic shielding performance of an aluminum oxide film and the corrosion-resistant aluminum alloy conductive oxidation process. The process is simple to operate, and the whole process is simple and convenient. The freshly formed film is colloidal and easily damaged by impact, and the film is firm after aging treatment and has good adhesion to the substrate. In addition, the invention pastes the antistatic film on the LRM module surface, thereby avoiding the pollution of the natural color conductive oxide film and the physical damage of the natural color conductive oxide film and the product matrix caused by the processes of assembly and debugging of the product, ensuring the process surface quality of the product and improving the long-term working reliability of the product.
The method comprises the steps of putting a cleaned product into a plastic tank, a PP/PVC tank or a 304 stainless steel tank natural color conductive oxidation liquid, carrying out oxidation treatment, wherein the oxidation time is within 4-6 minutes, cleaning an oxidized LRM module part by adopting three-stage flowing water, putting the treated product into a sealing liquid for sealing, and putting the sealed product into an oven for curing a film layer; after the natural color conductive oxidation and sealing treatment, a chemical treatment film layer which can keep the natural color of an aluminum product and does not influence the surface conductivity is obtained on an LRM module part alloy part, and a natural color conductive oxidation film with good corrosion resistance and good pollution resistance can be obtained on the surface of an LRM module of aluminum-based airborne electronic equipment, so that the LRM module is prevented from being polluted in the using process, and further the product corrosion is prevented. The process method is stable, the natural color conductive oxide film prepared on the surface of the LRM module is uniform and compact, the bonding force is good, the corrosion resistance is high, the pollution resistance is good, and the problems of pollution substances and corrosion, such as blackening and yellowing of the natural color conductive oxide film, in the product transferring, assembling and testing processes in the prior art can be solved, so that the product protection failure is caused. The result shows that the oxide film obtained by the process is colorless and transparent, has good conductivity and strong corrosion resistance. Thereby preventing the metal from being eroded by harmful gas and other media, and the film layer has good adhesion.
The invention adopts hole sealing liquid to seal holes after oxidation; aging the film layer after finishing; and finally, pasting antistatic films on two large surfaces of the LRM module structural member. The protection method can effectively improve the protection performance of the LRM module, prevent the appearance of the LRM module structural member from being polluted, prevent the LRM module structural member from being damaged in the processes of product assembly, debugging and environmental test, and obviously improve the wear resistance. After the sealing treatment, the color and luster are unchanged, the corrosion resistance and the wear resistance of the natural color oxide film are improved, the influence of the test conductivity is small, the quality is stable, the film layer is uniform, the resistivity is low, and the protective performance meets the requirements. The invention can be applied to airborne integrated electronic equipment with high reliability requirement, and meets the electromagnetic shielding requirement of the electronic equipment.
Drawings
In order that the invention may be more clearly understood, it will now be described by way of example with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic diagram of an LRM module case component to which an embodiment of the invention is attached.
The present invention will be described in further detail with reference to examples.
Detailed Description
Referring to fig. 1, according to the present invention, a proper hanging manner and a hanger are selected in combination with a structural form of an LRM module part, the LRM module part is mounted on the hanger in an oxidation process, and the LRM module part is fixed; putting the hung LRM module part into an oil-alkali removing solution for pretreatment, removing oil stains and oxide scales on the surface of a product, selecting a pickling solution for pickling according to the material of the LRM module part, using sulfuric acid as antirust aluminum, using hydrofluoric acid as a silicon-containing material, removing floating ash, loose substances and impurities on the surface of the product, cleaning the LRM module part with three-level flowing water, putting the cleaned product into a plastic tank, a PP/PVC tank or a 304 stainless steel tank for oxidation treatment, wherein the oxidation time is within 4-6 minutes, cleaning the oxidized LRM module part with three-level flowing water, putting the treated product into a sealing solution for sealing, and putting the sealed product into an oven for film layer curing; after the natural color conductive oxidation treatment, a chemical treatment film layer which not only keeps the natural color of the aluminum product but also does not influence the surface conductivity is obtained on the LRM module part alloy part, and finally, an anti-static film is pasted on the large surface of the structural part.
For the stability of the bath solution, 10% of the old solution is taken out from the bath solution for 2-3 days, and then 10% of the new solution is added, and a cycle period is formed every 10 times according to the proportion.
The formula and the process conditions of the natural color chemical oxidation liquid are as follows:
phosphoric acid (H)3PO4)40～60ml/L
Chromic anhydride (CrO)3)15～25g/L
Sodium fluoride (NaF) 2-4 g/L boric acid (H)3BO3)0.8～1.2g/L
The temperature is 20-30 DEG C
The time is 4-6min
And in the oxidation process, the oxidation solution is filtered and flows sufficiently to obtain a good-quality natural-color chemical oxidation film.
The process conditions for carrying out closed pore treatment on the natural color chemical oxidation layer are as follows:
10-20 ml/L of silicon-based composite sealing agent, the using temperature is 25-30 ℃, the dipping time is 20-30 s, the curing treatment of the film layer is carried out after the hole sealing treatment, and the curing condition is 30min at the temperature of 60 ℃.
After the natural color chemical oxidation, the hole closing treatment and the film layer solidification are finished, an anti-static film is pasted on the large surface of the LRM module structural member, the electrification voltage of the anti-static film is less than 100v, and the surface resistance is 106～109Omega, high temperature resistance is not lower than 85 ℃.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications should fall within the scope of the present invention.
Claims (5)
1. A protection method of a high corrosion resistance airborne aluminum-based LRM module is characterized by comprising the following steps: selecting a proper hanging mode and a proper hanging tool by combining the structure form of the LRM module part, installing the LRM module part on the hanging tool in the oxidation process, and fixing the LRM module part; putting the hung LRM module part into an oil-alkali removing solution for pretreatment, removing oil stains and oxide scales on the surface of an LRM module product, selecting an acid washing solution according to the material of the LRM module part for acid washing, using sulfuric acid as antirust aluminum, using hydrofluoric acid as a silicon-containing material, removing floating ash, loose substances and impurities on the surface of the product, cleaning the LRM module part with three-level flowing water, putting the cleaned product into a plastic tank, a PP/PVC tank or a 304 stainless steel tank natural color conductive oxidation solution, carrying out oxidation treatment by matching with a phosphate system basic guide solution of PH1-2, oxidizing for 4-6min at a low temperature of 20-30 ℃, using three-level flowing water for cleaning the oxidized LRM module part, putting the treated product into a sealing solution for sealing, and putting the product into an oven for film layer curing; after the natural color conductive oxidation treatment, a chemical treatment film layer which not only keeps the natural color of the aluminum product but also does not influence the surface conductivity is obtained on the LRM module part alloy part, and finally, an antistatic film is pasted on the large surface of the LRM module part.
2. The method of protecting a highly corrosion-resistant airborne aluminum-based LRM module of claim 1, wherein: for the stability of the bath solution, 10% of the old solution is taken out from the bath solution for 2-3 days, and then 10% of the new solution is added, and a cycle period is formed every 10 times according to the proportion.
3. The method of protecting a highly corrosion-resistant airborne aluminum-based LRM module of claim 1, wherein: the formula and the process conditions of the natural color chemical oxidation liquid are as follows:
phosphoric acid (H)3PO4)40～60ml/L
Chromic anhydride (CrO)3)15～25g/L
Sodium fluoride (NaF) 2-4 g/L boric acid (H)3BO3)0.8～1.2g/L
The temperature is 20-30 DEG C
The time is 4-6min
And in the oxidation process, the oxidation solution is filtered and flows sufficiently to obtain a good-quality natural-color chemical oxidation film.
4. The method of protecting a highly corrosion-resistant airborne aluminum-based LRM module of claim 1, wherein: 10-20 ml/L of silicon-based composite sealing agent, the using temperature is 25-30 ℃, the dipping time is 20-30 s, the curing treatment of the film layer is carried out after the hole sealing treatment, and the curing condition is 30min at the temperature of 60 ℃.
5. The method of protecting a highly corrosion-resistant airborne aluminum-based LRM module of claim 1, wherein: after the natural color chemical oxidation, the hole closing treatment and the film layer solidification are finished, an anti-static film is pasted on the large surface of the LRM module structural member, the electrification voltage of the anti-static film is less than 100v, and the surface resistance is 106～109Omega, high temperature resistance is not lower than 85 ℃.
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|---|---|---|---|---|
| CN114318316A (en) * | 2021-10-28 | 2022-04-12 | 中国航发西安动力控制科技有限公司 | Aluminum alloy colorless chemical oxidation treatment solution and process |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518468A (en) * | 1983-02-22 | 1985-05-21 | Dennison Manufacturing Company | Process for making electrostatic imaging surface |
| JPH08134693A (en) * | 1994-11-11 | 1996-05-28 | Mitsubishi Chem Corp | Production of high dielectric constant composite aluminum oxide coating film |
| JP2003232919A (en) * | 2002-02-07 | 2003-08-22 | Konica Corp | Polarizing plate, method for manufacturing the same and optical element |
| JP2004277866A (en) * | 2003-03-19 | 2004-10-07 | Suzuki Motor Corp | Sealing treatment method for aluminum or aluminum alloy |
| JP2010077532A (en) * | 2008-09-01 | 2010-04-08 | Suzuki Motor Corp | Sealing method for anodic oxide film |
| CN101950889A (en) * | 2010-08-25 | 2011-01-19 | 贵州航天电器股份有限公司 | LRM electric connector with electrostatic protection device |
| KR20120042123A (en) * | 2010-10-22 | 2012-05-03 | (주)탑나노시스 | Method for manufacturing working stage with cnt antistatic treatment and the working stage with cnt antistatic treatment |
| CN103215630A (en) * | 2013-04-23 | 2013-07-24 | 沈阳理工大学 | Method for sealing aluminum alloy anode oxide film pore by adopting organic-inorganic composite silica sol |
| CN105441743A (en) * | 2016-01-04 | 2016-03-30 | 东莞劲胜精密组件股份有限公司 | Aluminum-based amorphous alloy composite material and preparation method thereof |
| CN107740154A (en) * | 2017-10-13 | 2018-02-27 | 奇酷互联网络科技（深圳）有限公司 | Aluminum alloy casing and its processing method and electronic equipment |
| US20190154439A1 (en) * | 2016-03-04 | 2019-05-23 | May Patents Ltd. | A Method and Apparatus for Cooperative Usage of Multiple Distance Meters |
| CN110607549A (en) * | 2019-08-20 | 2019-12-24 | 帝京半导体科技(苏州)有限公司 | Anti-static hard anodic oxidation process |
-
2021
- 2021-06-30 CN CN202110730551.3A patent/CN113512744A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518468A (en) * | 1983-02-22 | 1985-05-21 | Dennison Manufacturing Company | Process for making electrostatic imaging surface |
| JPH08134693A (en) * | 1994-11-11 | 1996-05-28 | Mitsubishi Chem Corp | Production of high dielectric constant composite aluminum oxide coating film |
| JP2003232919A (en) * | 2002-02-07 | 2003-08-22 | Konica Corp | Polarizing plate, method for manufacturing the same and optical element |
| JP2004277866A (en) * | 2003-03-19 | 2004-10-07 | Suzuki Motor Corp | Sealing treatment method for aluminum or aluminum alloy |
| JP2010077532A (en) * | 2008-09-01 | 2010-04-08 | Suzuki Motor Corp | Sealing method for anodic oxide film |
| CN101950889A (en) * | 2010-08-25 | 2011-01-19 | 贵州航天电器股份有限公司 | LRM electric connector with electrostatic protection device |
| KR20120042123A (en) * | 2010-10-22 | 2012-05-03 | (주)탑나노시스 | Method for manufacturing working stage with cnt antistatic treatment and the working stage with cnt antistatic treatment |
| CN103215630A (en) * | 2013-04-23 | 2013-07-24 | 沈阳理工大学 | Method for sealing aluminum alloy anode oxide film pore by adopting organic-inorganic composite silica sol |
| CN105441743A (en) * | 2016-01-04 | 2016-03-30 | 东莞劲胜精密组件股份有限公司 | Aluminum-based amorphous alloy composite material and preparation method thereof |
| US20190154439A1 (en) * | 2016-03-04 | 2019-05-23 | May Patents Ltd. | A Method and Apparatus for Cooperative Usage of Multiple Distance Meters |
| CN107740154A (en) * | 2017-10-13 | 2018-02-27 | 奇酷互联网络科技（深圳）有限公司 | Aluminum alloy casing and its processing method and electronic equipment |
| CN110607549A (en) * | 2019-08-20 | 2019-12-24 | 帝京半导体科技(苏州)有限公司 | Anti-static hard anodic oxidation process |
Non-Patent Citations (5)
| Title |
|---|
| SHUAI HUANG等: "Microstructural characterization andfilm-forming mechanism of a phosphate chemical conversion ceramic coating prepared on the surface of 2A12 aluminum alloy" * |
| 周丽;: "LY12铝合金表面防腐蚀工艺" * |
| 李贤成，吴梅: "铝及铝合金化学成膜" * |
| 李贤成: "铝件双色处理工艺" * |
| 陆剑芳: "铝和铝合金本色导电氧化工艺研究" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318316A (en) * | 2021-10-28 | 2022-04-12 | 中国航发西安动力控制科技有限公司 | Aluminum alloy colorless chemical oxidation treatment solution and process |
| CN114318316B (en) * | 2021-10-28 | 2024-01-12 | 中国航发西安动力控制科技有限公司 | Colorless chemical oxidation treatment solution and process for aluminum alloy |
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