CN111155120A - Surface treatment method of corrosion-resistant alloy part - Google Patents
Surface treatment method of corrosion-resistant alloy part Download PDFInfo
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- CN111155120A CN111155120A CN201911425746.6A CN201911425746A CN111155120A CN 111155120 A CN111155120 A CN 111155120A CN 201911425746 A CN201911425746 A CN 201911425746A CN 111155120 A CN111155120 A CN 111155120A
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- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
Abstract
The invention discloses a surface treatment method of a corrosion-resistant alloy piece, which specifically comprises the following steps: s1, polishing the aluminum alloy member by a polishing machine, soaking the member in acetic acid solution for 30-50min, taking out, wiping the surface of the member clean by using soft wiping cloth, and putting the member into an ultrasonic cleaner for ultrasonic cleaning to remove an oxide film on the surface of the aluminum alloy member. According to the surface treatment method of the corrosion-resistant alloy part, the carbon fiber, the tetrafluoroethylene and the copper oxide are added in the coating, so that the corrosion resistance of the aluminum alloy component is enhanced, the compressive strength of the component is improved by adding the nano ceramic powder and the graphite powder, the graphite powder also has high temperature resistance, and the aluminum alloy component is soaked in an acetic acid solution and the coating is sprayed by plasma spraying, so that the component can be normally used in different use environments.
Description
Technical Field
The invention relates to the technical field of alloy part production, in particular to a surface treatment method of a corrosion-resistant alloy part.
Background
Aluminum alloy is a non-ferrous metal structural material which is most widely applied in industry, and is widely applied in aviation, aerospace, automobiles, mechanical manufacturing, ships and chemical industry, the rapid development of industrial economy has increased the demand on aluminum alloy welded structural parts, so that the research on the weldability of the aluminum alloy is also deepened, the aluminum alloy is the most widely applied alloy, passenger cabins, front fuselages, middle fuselages, rear fuselages, vertical tails, flaps, lifting ailerons and horizontal tails of space shuttles are all made of the aluminum alloy, the main structural materials of various artificial earth satellites and space probes are also the aluminum alloy, and aluminum alloy plates can be divided into two types of non-painted products and painted products according to the surface treatment mode.
The aluminum alloy member is widely applied to various industries, the surface state of the aluminum alloy member can directly influence the performance of the aluminum alloy member, the surface of the aluminum alloy member is easy to corrode in a water-based environment or in an acid gas for a long time, the service life of the member is shortened, and meanwhile, the compressive strength of the member is still to be improved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a surface treatment method of a corrosion-resistant alloy part, which solves the problems that the surface of an aluminum alloy member is easy to corrode in a water-based environment or in an acid gas for a long time, the service life of the member is shortened, and the compression resistance of the member is poor.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a surface treatment method of corrosion-resistant alloy spare, through increased carbon fiber, tetrafluoroethylene and copper oxide in the coating inside, strengthened the corrosion resisting property of this aluminum alloy component, and the compressive strength of component has been improved in the addition of nanometer ceramic powder and graphite powder, graphite powder still has high temperature resistance simultaneously, adopt the acetic acid solution to soak and adopt the spraying mode of plasma spraying with the coating to the aluminum alloy component, make the component homoenergetic normal use under the service environment of difference, the life of this aluminum alloy component has been prolonged, specifically include the following step:
s1, polishing the aluminum alloy member by a polishing machine, soaking the member in an acetic acid solution for 30-50min, taking out, wiping the surface of the member clean by using soft wiping cloth, putting the member into an ultrasonic cleaner for ultrasonic cleaning, removing an oxide film on the surface of the aluminum alloy member, and removing oil stains and other dirt on the surface;
s2, drying the aluminum alloy member cleaned in the S1 at the temperature of 70-80 ℃, taking out the aluminum alloy member after drying, polishing the surface of the aluminum alloy member, keeping the surface flatness, performing sand blasting and coarsening treatment on the aluminum alloy member, and waiting for the aluminum alloy member to be reserved;
s3, putting graphite powder, sodium benzenesulfonate, potassium permanganate, carbon fibers, tetrafluoroethylene and copper oxide into a high-speed stirrer together for stirring and crushing treatment, setting the rotating speed of the stirrer to 1500-2000r/min, then filtering through a 60-mesh sieve, and putting fine materials obtained after filtering into a reaction kettle;
s4, according to the step S3, adding the nano ceramic powder into the reaction kettle, stirring for 40-60min at the rotating speed of 1200-1500r/min, then heating to 70 ℃, continuing to stir for 30min, cooling the reaction kettle to room temperature, adding the coupling agent and the deionized water, stirring for 70-80min at the rotating speed of 800-1000r/min, finally taking the material out of the reaction kettle, cooling the material at the sterile room temperature to obtain a spraying raw material, and waiting for later use;
s5, spraying the spraying raw material on the surface of the aluminum alloy component in S2 by using a plasma spraying technology, spraying uniformly, then baking the uniformly sprayed aluminum alloy component for 20-30min at 150 ℃ in the absence of oxygen to form a coating on the spraying raw material, and finally obtaining the corrosion-resistant aluminum alloy component, wherein the plasma spraying is a technology for strengthening the surface and modifying the surface of the material, and can ensure that the surface of a matrix has the performances of wear resistance, corrosion resistance, high-temperature oxidation resistance, electric insulation, heat insulation, radiation protection, friction reduction, sealing and the like, the plasma spraying technology is a method for heating the materials such as ceramics, alloys, metals and the like to a molten or semi-molten state by using a plasma electric arc driven by direct current as a heat source and spraying the materials to the surface of a pretreated workpiece at a high speed to form a firmly attached surface layer, and is also used for medical application, a coating of dozens of micrometers is sprayed on the surface of an artificial bone, as a method of strengthening artificial bones and enhancing their affinity.
Preferably, the spraying raw material in S4 comprises the following components in parts by weight: 10-12 parts of nano ceramic powder, 8-10 parts of graphite powder, 20-25 parts of deionized water, 8-10 parts of a coupling agent, 6-8 parts of sodium benzenesulfonate, 7-9 parts of potassium permanganate, 10-12 parts of carbon fibers, 14-16 parts of tetrafluoroethylene and 8-10 parts of copper oxide, wherein the coupling agent is a plastic additive which improves the interface performance of synthetic resin and inorganic filler or reinforcing material in plastic compounding, also called as a surface modifier, and can reduce the viscosity of synthetic resin melt in the plastic processing process, improve the dispersity of the filler to improve the processing performance, and further enable the product to obtain good surface quality and mechanical, thermal and electrical properties.
Preferably, the ultrasonic frequency of the ultrasonic cleaning machine in the step S1 is 25 KHz.
Preferably, the roughness of the aluminum alloy component in the S2 after sand blasting coarsening is 5.2 μm.
Preferably, the coating thickness in S5 is 65 μm.
(III) advantageous effects
The invention provides a surface treatment method of a corrosion-resistant alloy piece. The method has the following beneficial effects: the surface treatment method of the corrosion-resistant alloy part comprises the steps of polishing an aluminum alloy member by a polishing machine through S1, soaking the member in an acetic acid solution, taking out the member after soaking for 30-50min, wiping the surface of the member clean by using soft wiping cloth, putting the member into an ultrasonic cleaner for ultrasonic cleaning, removing an oxide film on the surface of the aluminum alloy member, and removing oil stains and other dirt on the surface; s2, drying the aluminum alloy member cleaned in the S1 at the temperature of 70-80 ℃, taking out the aluminum alloy member after drying, polishing the surface of the aluminum alloy member, keeping the surface flatness, performing sand blasting and coarsening treatment on the aluminum alloy member, and waiting for the aluminum alloy member to be reserved; s3, putting graphite powder, sodium benzenesulfonate, potassium permanganate, carbon fibers, tetrafluoroethylene and copper oxide into a high-speed stirrer together for stirring and crushing treatment, setting the rotating speed of the stirrer to 1500-2000r/min, then filtering through a 60-mesh sieve, and putting fine materials obtained after filtering into a reaction kettle; s4, according to the step S3, adding the nano ceramic powder into the reaction kettle, stirring for 40-60min at the rotating speed of 1200-1500r/min, then heating to 70 ℃, continuing to stir for 30min, cooling the reaction kettle to room temperature, adding the coupling agent and the deionized water, stirring for 70-80min at the rotating speed of 800-1000r/min, finally taking the material out of the reaction kettle, cooling the material at the sterile room temperature to obtain a spraying raw material, and waiting for later use; s5, spraying the spraying raw material on the surface of the aluminum alloy component in S2 by using a plasma spraying technology, spraying uniformly, then baking the uniformly sprayed aluminum alloy component for 20-30min at 150 ℃ in the absence of oxygen to form a coating by the spraying raw material, finally obtaining the corrosion-resistant aluminum alloy component, enhancing the corrosion resistance of the aluminum alloy component by adding carbon fiber, tetrafluoroethylene and copper oxide in the coating, improving the compression strength of the component by adding nano ceramic powder and graphite powder, simultaneously enabling the graphite powder to have high temperature resistance, soaking the aluminum alloy component by adopting an acetic acid solution and adopting a plasma spraying mode for the coating, enabling the component to be normally used in different use environments, and prolonging the service life of the aluminum alloy component.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides three technical schemes: a surface treatment method of a corrosion-resistant alloy piece specifically comprises the following embodiments:
example one
S1, polishing the aluminum alloy member by a polishing machine, soaking the member in an acetic acid solution, taking out after soaking for 30min, wiping the surface of the member clean by using soft wiping cloth, putting the member into an ultrasonic cleaner for ultrasonic cleaning, removing an oxidation film on the surface of the aluminum alloy member, and removing oil stains and other dirt on the surface;
s2, drying the aluminum alloy member cleaned in the S1 at 70 ℃, taking out the aluminum alloy member after drying, polishing the surface of the aluminum alloy member, keeping the surface flatness, performing sand blasting and coarsening treatment on the aluminum alloy member, and waiting for the aluminum alloy member to be reserved;
s3, putting 8 parts of graphite powder, 6 parts of sodium benzenesulfonate, 7 parts of potassium permanganate, 10 parts of carbon fiber, 14 parts of tetrafluoroethylene and 8 parts of copper oxide together into a high-speed stirrer for stirring and crushing treatment, setting the rotating speed of the stirrer to be 1500r/min, then filtering through a 60-mesh sieve, and putting fine materials obtained after filtering into a reaction kettle;
s4, according to the step S3, continuously adding 10 parts of nano ceramic powder into a reaction kettle, stirring for 40min at the rotating speed of 1200r/min, then heating to 70 ℃, continuously stirring for 30min, cooling the reaction kettle to room temperature, adding 8 parts of coupling agent and 20 parts of deionized water, stirring for 70min at the rotating speed of 800r/min, finally taking the material out of the reaction kettle, cooling the material at the aseptic room temperature to obtain a spraying raw material, and waiting for later use;
and S5, spraying the spraying raw material on the surface of the aluminum alloy member in the S2 by using a plasma spraying technology, uniformly spraying, and then baking the uniformly sprayed aluminum alloy member for 20min at 150 ℃ under an oxygen-free condition to enable the spraying raw material to form a coating, thereby finally obtaining the corrosion-resistant aluminum alloy member.
Example two
S1, polishing the aluminum alloy member by a polishing machine, soaking the member in an acetic acid solution, taking out after soaking for 40min, wiping the surface of the member clean by using soft wiping cloth, putting the member into an ultrasonic cleaner for ultrasonic cleaning, removing an oxide film on the surface of the aluminum alloy member, and removing oil stains and other dirt on the surface;
s2, drying the aluminum alloy member cleaned in the S1 at 75 ℃, taking out the aluminum alloy member after drying, polishing the surface of the aluminum alloy member, keeping the surface flatness, performing sand blasting and coarsening treatment on the aluminum alloy member, and waiting for the aluminum alloy member to be reserved;
s3, putting 9 parts of graphite powder, 7 parts of sodium benzenesulfonate, 8 parts of potassium permanganate, 11 parts of carbon fiber, 15 parts of tetrafluoroethylene and 9 parts of copper oxide together into a high-speed stirrer for stirring and crushing treatment, setting the rotating speed of the stirrer to be 1800r/min, then filtering by a 60-mesh sieve, and putting fine materials obtained after filtering into a reaction kettle;
s4, according to the step S3, continuously adding 11 parts of nano ceramic powder into the reaction kettle, stirring for 50min at the rotating speed of 1300r/min, then heating to 70 ℃, continuously stirring for 30min, cooling the reaction kettle to room temperature, adding 9 parts of coupling agent and 22 parts of deionized water, stirring for 75min at the rotating speed of 900r/min, finally taking the material out of the reaction kettle, cooling the material at the aseptic room temperature to obtain a spraying raw material, and waiting for later use;
and S5, spraying the spraying raw material on the surface of the aluminum alloy member in the S2 by using a plasma spraying technology, uniformly spraying, and then baking the uniformly sprayed aluminum alloy member for 25min at 150 ℃ under an oxygen-free condition to enable the spraying raw material to form a coating, thereby finally obtaining the corrosion-resistant aluminum alloy member.
EXAMPLE III
S1, polishing the aluminum alloy member by a polishing machine, soaking the member in an acetic acid solution, taking out after soaking for 50min, wiping the surface of the member clean by using soft wiping cloth, putting the member into an ultrasonic cleaner for ultrasonic cleaning, removing an oxidation film on the surface of the aluminum alloy member, and removing oil stains and other dirt on the surface;
s2, drying the aluminum alloy member cleaned in the S1 at the temperature of 80 ℃, taking out the aluminum alloy member after drying, polishing the surface of the aluminum alloy member, keeping the surface flatness, performing sand blasting and coarsening treatment on the aluminum alloy member, and waiting for the aluminum alloy member to be reserved;
s3, putting 10 parts of graphite powder, 8 parts of sodium benzenesulfonate, 9 parts of potassium permanganate, 12 parts of carbon fiber, 16 parts of tetrafluoroethylene and 10 parts of copper oxide together into a high-speed stirrer for stirring and crushing treatment, setting the rotating speed of the stirrer to be 2000r/min, then filtering through a 60-mesh sieve, and putting fine materials obtained after filtering into a reaction kettle;
s4, according to the step S3, continuously adding 12 parts of nano ceramic powder into the reaction kettle, stirring for 60min at the rotating speed of 1500r/min, then heating to 70 ℃, continuously stirring for 30min, cooling the reaction kettle to room temperature, adding 10 parts of coupling agent and 25 parts of deionized water, stirring for 80min at the rotating speed of 1000r/min, finally taking the material out of the reaction kettle, cooling the material at the aseptic room temperature to obtain a spraying raw material, and waiting for later use;
and S5, spraying the spraying raw material on the surface of the aluminum alloy member in the S2 by using a plasma spraying technology, uniformly spraying, and then baking the uniformly sprayed aluminum alloy member for 30min at 150 ℃ under an oxygen-free condition to enable the spraying raw material to form a coating, thereby finally obtaining the corrosion-resistant aluminum alloy member.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A surface treatment method of a corrosion-resistant alloy part is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, polishing the aluminum alloy member by a polishing machine, soaking the member in an acetic acid solution for 30-50min, taking out, wiping the surface of the member clean by using soft wiping cloth, putting the member into an ultrasonic cleaner for ultrasonic cleaning, removing an oxide film on the surface of the aluminum alloy member, and removing oil stains and other dirt on the surface;
s2, drying the aluminum alloy member cleaned in the S1 at the temperature of 70-80 ℃, taking out the aluminum alloy member after drying, polishing the surface of the aluminum alloy member, keeping the surface flatness, performing sand blasting and coarsening treatment on the aluminum alloy member, and waiting for the aluminum alloy member to be reserved;
s3, putting graphite powder, sodium benzenesulfonate, potassium permanganate, carbon fibers, tetrafluoroethylene and copper oxide into a high-speed stirrer together for stirring and crushing treatment, setting the rotating speed of the stirrer to 1500-2000r/min, then filtering through a 60-mesh sieve, and putting fine materials obtained after filtering into a reaction kettle;
s4, according to the step S3, adding the nano ceramic powder into the reaction kettle, stirring for 40-60min at the rotating speed of 1200-1500r/min, then heating to 70 ℃, continuing to stir for 30min, cooling the reaction kettle to room temperature, adding the coupling agent and the deionized water, stirring for 70-80min at the rotating speed of 800-1000r/min, finally taking the material out of the reaction kettle, cooling the material at the sterile room temperature to obtain a spraying raw material, and waiting for later use;
and S5, spraying the spraying raw material on the surface of the aluminum alloy member in the S2 by using a plasma spraying technology, uniformly spraying, and then baking the uniformly sprayed aluminum alloy member for 20-30min at 150 ℃ under an oxygen-free condition to enable the spraying raw material to form a coating, thereby finally obtaining the corrosion-resistant aluminum alloy member.
2. The surface treatment method of a corrosion-resistant alloy member according to claim 1, wherein: the spraying raw material in the S4 comprises the following components in parts by weight: 10-12 parts of nano ceramic powder, 8-10 parts of graphite powder, 20-25 parts of deionized water, 8-10 parts of a coupling agent, 6-8 parts of sodium benzenesulfonate, 7-9 parts of potassium permanganate, 10-12 parts of carbon fibers, 14-16 parts of tetrafluoroethylene and 8-10 parts of copper oxide.
3. The surface treatment method of a corrosion-resistant alloy member according to claim 1, wherein: and the ultrasonic frequency of the ultrasonic cleaning machine in the S1 is 25 KHz.
4. The surface treatment method of a corrosion-resistant alloy member according to claim 1, wherein: the roughness of the aluminum alloy component in the S2 after sand blasting coarsening is 5.2 mu m.
5. The surface treatment method of a corrosion-resistant alloy member according to claim 1, wherein: the coating thickness in S5 was 65 μm.
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| CN115404483A (en) * | 2022-08-16 | 2022-11-29 | 浙江鸿昌铝业有限公司 | Surface treatment process of aluminum alloy section |
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| CN115740675A (en) * | 2022-11-24 | 2023-03-07 | 惠州市乐亿通科技有限公司 | Auxiliary welding method for PCB and electronic device plug by using white vinegar |
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Application publication date: 20200515 |