CN113463011A - Novel aluminum alloy and surface treatment process thereof - Google Patents
Novel aluminum alloy and surface treatment process thereof Download PDFInfo
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- CN113463011A CN113463011A CN202110741761.2A CN202110741761A CN113463011A CN 113463011 A CN113463011 A CN 113463011A CN 202110741761 A CN202110741761 A CN 202110741761A CN 113463011 A CN113463011 A CN 113463011A
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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
- C23C4/137—Spraying in vacuum or in an inert atmosphere
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/66—Treatment of aluminium or alloys based thereon
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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
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
Abstract
The invention relates to the technical field of metal surface treatment, in particular to a novel aluminum alloy and a surface treatment process thereof, and the novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the pores of the nano micropores are 5-10nm, and the thickness of the anodic oxidation film layer is 5-8 mu. The novel aluminum alloy of the invention forms the anodic oxidation film layer with strong adsorption capacity after the aluminum alloy body is subjected to anodic oxidation, and the anodic oxidation film layer has good adsorption capacity due to the nano-grade nano-micropores, so that the binding force between the anodic oxidation film layer and the chromium carbide coating is enhanced, and the novel aluminum alloy has better metal texture and decoration compared with the traditional anodic oxidation aluminum alloy. Meanwhile, the anodic oxide film layer and the chromium carbide coating are superposed, so that the mechanical properties such as corrosion resistance, strength and the like of the aluminum alloy substrate can be improved.
Description
Technical Field
The invention relates to the technical field of metal surface treatment, in particular to a novel aluminum alloy and a surface treatment process thereof.
Background
At present, aluminum alloy is taken as the most commonly used alloy metal, and particularly, the aluminum alloy is widely applied to the electronic equipment industries such as computers, mobile phones and the like, the anodic oxidation coating formed on aluminum and the like is required to have performances such as corrosion resistance and the like according to the application, surface treatment is carried out for endowing the performances, the traditional aluminum alloy is generally subjected to anodic oxidation treatment to enhance the surface hardness and the decoration, and the traditional anodic oxidation lacks the mirror surface effect and the metal texture of the stainless steel PVD. The traditional stainless steel PVD material has high processing cost and heavy weight, and is easy to fall off a film, and the existing aluminum alloy product has larger use limitation, thereby greatly limiting the application of the aluminum alloy in the electronic product industry.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a novel aluminum alloy, wherein an anodic oxidation film layer with strong adsorption capacity is formed by anodizing an aluminum alloy body, and the anodic oxidation film layer has good adsorption capacity due to the fact that nano-grade nano-micropores are contained, so that the bonding force between the anodic oxidation film layer and a chromium carbide coating is enhanced, and the novel aluminum alloy has better metal texture and decoration compared with the traditional anodic oxidation aluminum alloy. Meanwhile, the anodic oxide film layer and the chromium carbide coating are superposed, so that the mechanical properties such as corrosion resistance, strength and the like of the aluminum alloy substrate can be improved.
Another object of the present invention is to provide a novel aluminum alloy surface treatment process, which is simple in operation, wherein an anodic oxide film layer with strong adsorption capacity and nano-micropores are formed on the surface of an aluminum alloy body after anodic oxidation, so that the anodic oxide film has better adsorption capacity, and a chromium carbide coating is formed by performing magnetron sputtering by using a PVD technique, so that the prepared novel aluminum alloy has better corrosion resistance and surface hardness of 7H.
The purpose of the invention is realized by the following technical scheme: the novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the holes of the nano micropores are 5-10nm, and the thickness of the anodic oxidation film layer is 5-8 mu.
The novel aluminum alloy of the invention forms an anodic oxidation film layer with strong adsorption capacity by the aluminum alloy body after anodic oxidation, and the anodic oxidation film layer has good adsorption capacity due to the nano-grade nano-micropores, so that the binding force between the novel aluminum alloy and the chromium carbide coating is enhanced, and the novel aluminum alloy has better metal texture and decoration compared with the traditional anodic oxidation aluminum alloy. Meanwhile, the anodic oxide film layer and the chromium carbide coating are superposed, so that the mechanical properties such as corrosion resistance, strength and the like of the aluminum alloy substrate can be improved.
The invention also provides a novel aluminum alloy surface treatment process, which comprises the following steps:
s1, taking the aluminum alloy base material to hang, degreasing for 60-120S at 45-65 ℃, then washing with water for the first time, then acid washing and demoulding for 60-120S, and washing with water for the second time for later use; spraying Oreou 161 oil-removing powder with concentration of 50-60g/L during degreasing treatment; the pickling solution adopted in the pickling in the step S1 is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 3-6%;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in electrolyte with the voltage of 8-12V for electrolysis for 25-35min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 4-8min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 40-60 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
The novel aluminum alloy is prepared by the surface treatment process, the process is simple to operate, and the prepared aluminum alloy has the advantages of better metal texture, better decoration, stronger surface hardness, lighter material, better bonding force and lower machining cost; an anodic oxide film layer with strong adsorption capacity and nano micropores are formed on the surface of the aluminum alloy body after anodic oxidation, so that the anodic oxide film has better adsorption capacity, and a chromium carbide coating is formed by utilizing a PVD (physical vapor deposition) technology for magnetron sputtering, so that the prepared novel aluminum alloy has better corrosion resistance. In the step S1, the oil removing powder adopting oiye 161 has extremely low foamability because of containing a special surfactant, can be used in a spraying procedure, has good oil or pollutant removing and cleaning effects, and does not contain silicate, so that the oil or pollutant removing and cleaning powder is not influenced by a silicic acid film, has low corrosivity, and does not damage the luster of an aluminum alloy substrate; the anodizing treatment adopted in the step S2 is mainly to oxidize the surface of the highlight chamfer to form a compact and hard oxide film aiming at the highlight chamfer structure of the aluminum alloy product, so that the highlight chamfer structure is more wear-resistant and less prone to contamination, and meanwhile, the anodic oxidation treatment process and parameters are controlled to avoid the influence on the yield of the product caused by the anodic oxidation of the shielding area; in the step S3, the ultrasonic treatment adopted in the surfactant has good effect, the treated sediments are less, the antibacterial and anticorrosive performance can be improved, and the protection effect on the workpiece can be improved; and utilize PVD technique to carry out magnetron sputtering and form chromium carbide coating, can make the novel aluminum alloy corrosion resistance that makes better, surface hardness can reach 7H, compare traditional oxidation and PVD processing, the outward appearance metal feel of aluminum alloy is more excellent, and decorative better, surface hardness is stronger, has the advantage that the material is lighter, the cohesion is better, the machining cost is lower.
Preferably, the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and washing with clean water for 3-5 times;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 60-120s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
In the step S5, after oil is removed, acid liquor is used for acid washing to neutralize alkali liquor attached to the surface of the aluminum alloy base material, and then the aluminum alloy base material is washed by clean water for multiple times, so that residues attached to the aluminum alloy base material after neutralization can be cleaned, and oil or pollutants can be well cleaned.
Preferably, the PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy base material treated in the step S5 to a coating chamber, heating to the temperature of 120-150 ℃, performing glow cleaning for 60-120S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
In the invention, the glow cleaning is carried out in the step S6, argon ions are utilized to bombard the surface of the anodic oxide film layer, various particles on the surface of the anodic oxide film layer are caused to escape to generate splashing, and the splashed neutral atoms Cr and C react with gas particles ionized in the vacuum cavity at the same time to be deposited on the surface of a workpiece, so that a CrC film layer with a certain thickness is formed.
Preferably, the technological parameters when the chromium carbide layer is sprayed are as follows:
powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 15-20 parts of; main gas pressure (argon, psi): 60-80 parts; main gas flow (argon, SCFH): 75-85; auxiliary gas pressure (hydrogen, psi): 60-70 parts of; powder feed gas pressure (argon, Bar): 3.0-3.4; powder feed gas flow (argon, NLPM): 6-8; spray current (a): 510-530; spray voltage (V): 55-65 parts; spraying distance (mm): 100-; lance travel speed (mm/s): 450-650.
The chromium carbide powder reaches a good melting state by adjusting the spraying power, the spraying distance, the powder feeding amount, the main and auxiliary air pressure and flow of the chromium carbide layer, the prepared coating has higher hardness, uniform and compact structure, obvious micro-laminated structure, no layering, cracking and aggregation phenomena, the oxide of the coating is uniformly distributed, and the interface of the coating and a substrate is well combined.
Preferably, the ultrasonic treatment in the step S3 and the E2 both adopt the frequency of 4500-6500Hz, the current of 0.8-1.6A, the temperature of 25-30 ℃ and the ultrasonic treatment time of 4-6 min.
In the invention, the frequency, the current, the temperature and the treatment time during the ultrasonic treatment in the steps S3 and E2 are strictly controlled, so that the ultrasonic cleaning effect is good, and the treated sediments are less.
Preferably, the deoiling liquid in the deoiling tank in the step E1 adopts a sodium carbonate solution with the mass concentration of 4-8%, the current adopted during electrolysis is 8-12A, and the electrolysis treatment time is 3-5 s; and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 4-8%, and the pickling treatment time is 3-5 s.
In the invention, the electrolytic degreasing mode is adopted in the step E1 to degrease, so that the degreasing effect is improved, the defect that a large amount of high-concentration alkali liquor is adopted for long-time soaking in the conventional single pickling degreasing process can be avoided, the generation of acidic sewage can be effectively reduced, the environmental protection property is improved, and meanwhile, the alkali liquor attached to the surface of the metal plate is neutralized by adopting low-concentration dilute sulfuric acid or dilute nitric acid solution after degreasing, so that the influence of subsequent PVD treatment on the adhesive force can be avoided.
More preferably, the surfactant in step S3 includes the following raw materials in parts by weight:
4-8 parts of composite fluorozirconate, 1-5 parts of triethanolamine, 1-3 parts of sodium citrate, 1-5 parts of potassium maleate, 1-3 parts of sodium bicarbonate, 2-6 parts of glycerol, 401-5 parts of tween and 20-40 parts of solvent.
Each part of the composite fluorozirconate is a mixture consisting of sodium fluoride, ammonium fluorozirconate and sodium fluorozirconate according to the weight ratio of 0.1-0.5:0.8-1.2: 0.6-1.0; each part of the solvent is a mixture of water, ethanol and diethyl ether according to the weight ratio of 1-3:0.8-1.2: 0.1-0.5.
The surfactant is prepared by the following steps:
1) mixing sodium bicarbonate, potassium maleate and sodium citrate according to parts by weight, uniformly stirring, adding into a solvent, and stirring and dispersing at the speed of 40-60r/min for 4-8min to obtain a mixture A for later use;
2) mixing the composite fluorozirconate, triethanolamine, Tween 40 and glycerol according to the parts by weight, and stirring and mixing for 4-10min at the temperature of 50-55 ℃ to obtain a mixture B for later use;
3) adding the mixture B into the mixture A, and stirring and dispersing at the speed of 400-600r/min for 60-120min to obtain the surfactant.
The surface active agent adopted in the invention is composed of the raw materials, and the surface active agent prepared by utilizing the raw materials can be ionized in water to make the solution alkaline, so that the surface of the aluminum alloy can be corroded, the depth and the aperture of the hole are increased, the bonding strength of the anodic oxide film layer and the chromium carbide coating is enhanced, the problems that the existing surface antioxidant treatment agent for the aluminum alloy is poor in color and compactness for forming a protective film, the preparation process is complicated, and the pollution performance is strong are solved, the adhesive force between the coating and a workpiece can be improved, the coating is uniform and smooth, the compatibility among the raw materials can be effectively improved by adding sodium bicarbonate, and the film forming effect can be achieved. The adopted composite fluorozirconate has more excellent light resistance and dyeing fixity; the triethanolamine used as stain remover, sodium citrate as double coordination agent and Tween 40 as non-ionic surfactant do not exist in ionic state in solution, so that it has high stability, is not easily affected by strong electrolyte and acid and alkali, and can maintain the action of lowering surface tension of solution.
The invention has the beneficial effects that: the novel aluminum alloy of the invention forms the anodic oxidation film layer with strong adsorption capacity after the aluminum alloy body is subjected to anodic oxidation, and the anodic oxidation film layer has good adsorption capacity due to the nano-grade nano-micropores, so that the binding force between the anodic oxidation film layer and the chromium carbide coating is enhanced, and the novel aluminum alloy has better metal texture and decoration compared with the traditional anodic oxidation aluminum alloy. Meanwhile, the anodic oxide film layer and the chromium carbide coating are superposed, so that the mechanical properties such as corrosion resistance, strength and the like of the aluminum alloy substrate can be improved.
The novel aluminum alloy surface treatment process is simple to operate, an anodic oxide film layer with strong adsorption capacity and nano micropores are formed on the surface of an aluminum alloy body after anodic oxidation, the anodic oxide film layer has better adsorption capacity, a chromium carbide coating is formed by utilizing a PVD (physical vapor deposition) technology to perform magnetron sputtering, the prepared novel aluminum alloy has better corrosion resistance, and the surface hardness can reach 7H.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
The novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the holes of the nano micropores are 5nm, and the thickness of the anodic oxidation film layer is 5 mu.
The novel aluminum alloy surface treatment process comprises the following steps:
s1, taking the aluminum alloy substrate, hanging the aluminum alloy substrate, degreasing the aluminum alloy substrate at 45 ℃ for 60S, washing the aluminum alloy substrate with water for the first time, then acid washing and demoulding the aluminum alloy substrate, wherein the time for acid washing and demoulding is 60S, and then washing the aluminum alloy substrate with water for the second time for later use;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in electrolyte with the voltage of 8V for electrolysis for 25min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 4min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 40 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
In the step S1, Oreou 161 oil powder with the concentration of 50g/L is sprayed during degreasing treatment; the pickling solution adopted in the pickling in the step S1 is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 3%;
the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and washing with clean water for 3 times after oil removal;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 60s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
The PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy substrate treated in the step S5 to a coating chamber, heating to 120 ℃, performing glow cleaning for 60S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
The technological parameters when the chromium carbide layer is sprayed are as follows:
powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 15; main gas pressure (argon, psi): 60, adding a solvent to the mixture; main gas flow (argon, SCFH): 75; auxiliary gas pressure (hydrogen, psi): 60, adding a solvent to the mixture; powder feed gas pressure (argon, Bar): 3.0; powder feed gas flow (argon, NLPM): 6; spray current (a): 510; spray voltage (V): 55; spraying distance (mm): 100, respectively; lance travel speed (mm/s): 450.
the ultrasonic treatment in the step S3 and the step E2 adopts the frequency of 4500Hz, the current of 0.8A, the temperature of 25 ℃ and the ultrasonic treatment time of 4 min.
The deoiling liquid in the deoiling groove in the step E1 adopts a sodium carbonate solution with the mass concentration of 4%, the current adopted during electrolysis is 8A, and the electrolysis treatment time is 3 s; and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 4%, and the pickling treatment time is 3 s.
The surfactant in the step S3 comprises the following raw materials in parts by weight:
4 parts of composite fluorozirconate, 1 part of triethanolamine, 1 part of sodium citrate, 1 part of potassium maleate, 1 part of sodium bicarbonate, 2 parts of glycerol, 401 parts of tween and 20 parts of solvent.
Each part of the composite fluorozirconate is a mixture consisting of sodium fluoride, ammonium fluorozirconate and sodium fluorozirconate according to the weight ratio of 0.1:0.8: 0.6.
Each part of the solvent is a mixture of water, ethanol and diethyl ether according to the weight ratio of 1:0.8: 0.1.
The surfactant is prepared by the following steps:
1) mixing sodium bicarbonate, potassium maleate and sodium citrate according to parts by weight, uniformly stirring, adding into a solvent, and stirring and dispersing at the speed of 40r/min for 4min to obtain a mixture A for later use;
2) mixing the composite fluorozirconate, triethanolamine, tween 40 and glycerol according to the parts by weight, and stirring and mixing for 4min at the temperature of 50 ℃ to obtain a mixture B for later use;
3) and adding the mixture B into the mixture A, and stirring and dispersing at the speed of 400r/min for 60min to obtain the surfactant.
Example 2
The novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the holes of the nano micropores are 6nm, and the thickness of the anodic oxidation film layer is 6 mu.
The novel aluminum alloy surface treatment process comprises the following steps:
s1, taking an aluminum alloy base material, hanging the aluminum alloy base material, degreasing the aluminum alloy base material at the temperature of 50 ℃ for 75S, washing the aluminum alloy base material with water for the first time, then acid washing and demoulding, wherein the acid washing and demoulding time is 75S, and then washing the aluminum alloy base material with water for the second time for later use;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in electrolyte with the voltage of 9V for electrolysis for 28min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 5min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 45 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
In the step S1, Oreou 161 oil powder with the concentration of 53g/L is sprayed during degreasing treatment; the pickling solution adopted in the pickling in the step S1 is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 4%;
the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and washing with clean water for 3 times after oil removal;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 75s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
The PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy substrate treated in the step S5 to a coating chamber, heating to 125 ℃, performing glow cleaning for 75S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
The technological parameters when the chromium carbide layer is sprayed are as follows:
powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 16; main gas pressure (argon, psi): 65; main gas flow (argon, SCFH): 78, a nitrogen source; auxiliary gas pressure (hydrogen, psi): 63; powder feed gas pressure (argon, Bar): 3.1; powder feed gas flow (argon, NLPM): 6.5; spray current (a): 515; spray voltage (V): 58; spraying distance (mm): 103; lance travel speed (mm/s): 500.
the ultrasonic treatment in the step S3 and the step E2 adopts the frequency of 5000Hz, the current of 1.0A, the temperature of 26 ℃ and the ultrasonic treatment time of 5 min.
The deoiling liquid in the deoiling tank in the step E1 adopts a sodium carbonate solution with the mass concentration of 5%, the current adopted during electrolysis is 9A, and the electrolysis treatment time is 3.5 s; and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 5%, and the pickling treatment time is 3.5 s.
The surfactant in the step S3 comprises the following raw materials in parts by weight:
5 parts of composite fluorozirconate, 2 parts of triethanolamine, 1.5 parts of sodium citrate, 2 parts of potassium maleate, 2.5 parts of sodium bicarbonate, 4 parts of glycerol, 402 parts of tween and 25 parts of solvent.
Each part of the composite fluorozirconate is a mixture consisting of sodium fluoride, ammonium fluorozirconate and sodium fluorozirconate according to the weight ratio of 0.2:0.9: 0.7.
Each part of the solvent is a mixture of water, ethanol and diethyl ether according to the weight ratio of 1.5:0.9: 0.2.
The surfactant is prepared by the following steps:
1) mixing sodium bicarbonate, potassium maleate and sodium citrate according to parts by weight, uniformly stirring, adding into a solvent, and stirring and dispersing at the speed of 45r/min for 5min to obtain a mixture A for later use;
2) mixing the composite fluorozirconate, triethanolamine, tween 40 and glycerol according to the parts by weight, and stirring and mixing for 5min at the temperature of 51 ℃ to obtain a mixture B for later use;
3) and adding the mixture B into the mixture A, and stirring and dispersing at the speed of 450r/min for 75min to obtain the surfactant.
Example 3
The novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the holes of the nano micropores are 7nm, and the thickness of the anodic oxidation film layer is 7 mu.
The novel aluminum alloy surface treatment process comprises the following steps:
s1, taking an aluminum alloy base material, hanging the aluminum alloy base material, degreasing the aluminum alloy base material for 90S at the temperature of 55 ℃, washing the aluminum alloy base material with water for the first time, then acid washing and demoulding the aluminum alloy base material for 90S, and washing the aluminum alloy base material with water for the second time for later use;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in an electrolyte with the voltage of 10V for electrolysis for 30min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 6min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 50 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
In the step S1, Oreou 161 oil powder with the concentration of 55g/L is sprayed during degreasing treatment; the pickling solution adopted in the pickling in the step S1 is a dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 5%;
the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and washing with clean water for 4 times after oil removal;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 90s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
The PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy substrate treated in the step S5 to a coating chamber, heating to 135 ℃, performing glow cleaning for 90S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
The technological parameters when the chromium carbide layer is sprayed are as follows:
powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 17; main gas pressure (argon, psi): 70; main gas flow (argon, SCFH): 80; auxiliary gas pressure (hydrogen, psi): 65; powder feed gas pressure (argon, Bar): 3.2; powder feed gas flow (argon, NLPM): 7; spray current (a): 520, respectively; spray voltage (V): 60, adding a solvent to the mixture; spraying distance (mm): 105; lance travel speed (mm/s): 550.
in the step S3 and the step E2, the ultrasonic treatment is carried out at a frequency of 5500Hz, a current of 1.2A, a temperature of 27 ℃ and an ultrasonic treatment time of 5 min.
The deoiling liquid in the deoiling groove in the step E1 adopts a sodium carbonate solution with the mass concentration of 6%, the current adopted during electrolysis is 10A, and the electrolysis treatment time is 4 s; and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 6%, and the pickling treatment time is 4 s.
The surfactant in the step S3 comprises the following raw materials in parts by weight:
6 parts of composite fluorozirconate, 3 parts of triethanolamine, 2 parts of sodium citrate, 3 parts of potassium maleate, 2 parts of sodium bicarbonate, 4 parts of glycerol, 403 parts of tween and 30 parts of solvent.
Each part of the composite fluorozirconate is a mixture consisting of sodium fluoride, ammonium fluorozirconate and sodium fluorozirconate according to the weight ratio of 0.3:1.0: 0.8.
Each part of the solvent is a mixture of water, ethanol and diethyl ether according to the weight ratio of 2:1.0: 0.3.
The surfactant is prepared by the following steps:
1) mixing sodium bicarbonate, potassium maleate and sodium citrate according to parts by weight, uniformly stirring, adding into a solvent, and stirring and dispersing at the speed of 50r/min for 6min to obtain a mixture A for later use;
2) mixing the composite fluorozirconate, triethanolamine, tween 40 and glycerol according to the parts by weight, and stirring and mixing for 6min at the temperature of 52 ℃ to obtain a mixture B for later use;
3) and adding the mixture B into the mixture A, and stirring and dispersing at the speed of 500r/min for 90min to obtain the surfactant.
Example 4
The novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the holes of the nano micropores are 8nm, and the thickness of the anodic oxidation film layer is 8 mu.
The novel aluminum alloy surface treatment process comprises the following steps:
s1, hanging the aluminum alloy base material, degreasing the aluminum alloy base material at 60 ℃ for 105S, washing the aluminum alloy base material with water for the first time, then acid washing and demoulding, wherein the acid washing and demoulding time is 105S, and then washing the aluminum alloy base material with water for the second time for later use;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in an electrolyte with the voltage of 11V for electrolysis for 32min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 7min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 55 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
Spraying Oreou 161 oil powder with concentration of 58g/L during degreasing in the step S1; the pickling solution adopted in the pickling in the step S1 is a dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 6%;
the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and washing with clean water for 4 times after oil removal;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 105s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
The PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy base material treated in the step S5 to a coating chamber, heating to 145 ℃, performing glow cleaning for 105S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
The technological parameters when the chromium carbide layer is sprayed are as follows:
powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 18; main gas pressure (argon, psi): 75; main gas flow (argon, SCFH): 83; auxiliary gas pressure (hydrogen, psi): 68; powder feed gas pressure (argon, Bar): 3.3; powder feed gas flow (argon, NLPM): 7.5; spray current (a): 525; spray voltage (V): 63; spraying distance (mm): 108; lance travel speed (mm/s): 600.
in the step S3 and the step E2, the ultrasonic treatment is carried out at the frequency of 6000Hz, the current of 1.4A, the temperature of 28 ℃ and the ultrasonic treatment time of 6 min.
The deoiling liquid in the deoiling groove in the step E1 adopts a sodium carbonate solution with the mass concentration of 7%, the current adopted during electrolysis is 11A, and the electrolysis treatment time is 4 s; and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 4%, and the pickling treatment time is 4.5 s.
The surfactant in the step S3 comprises the following raw materials in parts by weight:
7 parts of composite fluorozirconate, 4 parts of triethanolamine, 2.5 parts of sodium citrate, 4 parts of potassium maleate, 2.5 parts of sodium bicarbonate, 5 parts of glycerol, 404 parts of tween and 35 parts of solvent.
Each part of the composite fluorozirconate is a mixture consisting of sodium fluoride, ammonium fluorozirconate and sodium fluorozirconate according to the weight ratio of 0.4:1.1: 0.9.
Each part of the solvent is a mixture of water, ethanol and diethyl ether according to the weight ratio of 2.5:1.1: 0.4.
The surfactant is prepared by the following steps:
1) mixing sodium bicarbonate, potassium maleate and sodium citrate according to parts by weight, uniformly stirring, adding into a solvent, and stirring and dispersing at the speed of 55r/min for 7min to obtain a mixture A for later use;
2) mixing the composite fluorozirconate, triethanolamine, tween 40 and glycerol according to the parts by weight, and stirring and mixing for 4min at 53 ℃ to obtain a mixture B for later use;
3) and adding the mixture B into the mixture A, and stirring and dispersing at the speed of 550r/min for 105min to obtain the surfactant.
Example 5
The novel aluminum alloy comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the holes of the nano micropores are 10nm, and the thickness of the anodic oxidation film layer is 8 mu.
The novel aluminum alloy surface treatment process comprises the following steps:
s1, taking the aluminum alloy substrate, hanging the aluminum alloy substrate, degreasing the aluminum alloy substrate at 65 ℃ for 120S, washing the aluminum alloy substrate with water for the first time, then acid washing and demoulding the aluminum alloy substrate, wherein the time for acid washing and demoulding is 120S, and then washing the aluminum alloy substrate with water for the second time for later use;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in an electrolyte with the voltage of 12V for electrolysis for 35min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 8min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 60 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
In the step S1, Oreou 161 oil powder with the concentration of 60g/L is sprayed during degreasing treatment; the pickling solution adopted in the pickling in the step S1 is a dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 6%;
the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and clean water washing for 5 times after oil removal;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 120s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
The PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy substrate treated in the step S5 to a coating chamber, heating to 150 ℃, performing glow cleaning for 120S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
The technological parameters when the chromium carbide layer is sprayed are as follows:
powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 20; main gas pressure (argon, psi): 80; main gas flow (argon, SCFH): 85 parts by weight; auxiliary gas pressure (hydrogen, psi): 70; powder feed gas pressure (argon, Bar): 3.4; powder feed gas flow (argon, NLPM): 8; spray current (a): 530; spray voltage (V): 65; spraying distance (mm): 110; lance travel speed (mm/s): 650.
the ultrasonic treatment in the step S3 and the step E2 adopts the frequency of 6500Hz, the current of 1.6A, the temperature of 30 ℃ and the ultrasonic treatment time of 6 min.
The deoiling liquid in the deoiling groove in the step E1 adopts a sodium carbonate solution with the mass concentration of 8%, the current adopted during electrolysis is 12A, and the electrolysis treatment time is 5 s; and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 8%, and the pickling treatment time is 5 s.
The surfactant in the step S3 comprises the following raw materials in parts by weight:
8 parts of composite fluorozirconate, 5 parts of triethanolamine, 3 parts of sodium citrate, 5 parts of potassium maleate, 3 parts of sodium bicarbonate, 6 parts of glycerol, 405 parts of tween and 40 parts of solvent.
Each part of the composite fluorozirconate is a mixture consisting of sodium fluoride, ammonium fluorozirconate and sodium fluorozirconate according to the weight ratio of 0.5:1.2: 1.0.
Each part of the solvent is a mixture of water, ethanol and diethyl ether according to the weight ratio of 3:1.2: 0.5.
The surfactant is prepared by the following steps:
1) mixing sodium bicarbonate, potassium maleate and sodium citrate according to parts by weight, uniformly stirring, adding into a solvent, and stirring and dispersing at the speed of 60r/min for 8min to obtain a mixture A for later use;
2) mixing the composite fluorozirconate, triethanolamine, tween 40 and glycerol according to the parts by weight, and stirring and mixing for 10min at the temperature of 55 ℃ to obtain a mixture B for later use;
3) and adding the mixture B into the mixture A, and stirring and dispersing at the speed of 600r/min for 120min to obtain the surfactant.
Comparative example 1
This comparative example differs from example 1 above in that: the chromium carbide coating was replaced by a chromium nitride coating in the novel aluminum alloy of this comparative example. The remainder of this comparative example is the same as example 1 and will not be described again here.
Comparative example 2
This comparative example differs from example 3 above in that: in the comparative example, the steps S5 and S6 are not provided for the surface treatment of the novel aluminum alloy, but the chromium carbide coating is directly sprayed on the surface of the anodic oxide film layer. The remainder of this comparative example is the same as example 3 and will not be described again here.
Comparative example 3
This comparative example differs from example 5 above in that: the raw materials using the surfactant in this comparative example were not added with the complex fluorozirconate. The remainder of this comparative example is the same as example 5 and will not be described again here.
The plating baths prepared in examples 1, 3 and 5 and comparative examples 1 to 3 were subjected to the metallic luster feeling (G value), corrosion resistance and weather resistance tests, and the results are shown in table 1:
the corrosion resistance test method comprises the following steps: as the corrosion test, a salt water spray test of spraying a 5% NaCl aqueous solution at 35 ℃ was performed. Test pieces of aluminum alloy and aluminum alloy clad material were set in the test tank at an angle of 15 ° from the vertical. The test period was 28 days. Test pieces for each aluminum alloy, 5 pieces were each subjected to a test.
After the corrosion test, the テフロン tape for masking was removed from the test piece, and the test piece was immersed in 60% nitric acid to remove the corrosion product. Thereafter, the test piece was washed with water and washed with acetone to be dried, and the corrosion state was evaluated.
In the evaluation of the corrosion state, first, the presence or absence of a perforation (corrosion penetration) due to corrosion was examined by visual observation of the test piece. With respect to the aluminum alloys in which no perforation was observed in any of the 5 test pieces, the occurrence of localized corrosion was observed by a microscope on the 5 test pieces, and the localized corrosion depth was measured. The deepest partial corrosion depth of the 5 test pieces was defined as the maximum partial corrosion depth of the aluminum alloy. The evaluation criteria for corrosion resistance in the corrosion test shown in table 4 are as follows.
Very excellent: none of the 5 test pieces had any corrosion penetration and any local corrosion
Very good: none of the 5 test pieces had any through-etching and any localized etching, but the maximum localized etching depth was less than 20 μm
O: none of the 5 test pieces had any through-etching, and the maximum local etching depth was 20 μm or more and less than 100 μm
And (delta): none of the 5 test pieces had any penetration of corrosion, but the maximum local corrosion depth was 100 μm or more
X: at least 1 of the test pieces had a through-corrosion pattern
The metallic luster sensing method comprises the following steps: 1. firstly, the numerical value of a positive SHEEN micro gloss instrument is 0; 2. putting the product on a special jig; 3. opening the gloss tester to align the test hole with the product and lightly press the product for upper test, and starting testing;
the weather resistance was tested according to the standard method of GB 1767-1979 (1989).
TABLE 1
| Item | G value | Corrosion resistance | Weather resistance |
| Example 1 | 370 | ◎◎ | Superior food |
| Example 3 | 380 | ◎◎ | Superior food |
| Example 5 | 375 | ◎◎ | Superior food |
| Comparative example 1 | 335 | △ | Difference (D) |
| Comparative example 2 | 348 | ○ | Good wine |
| Comparative example 3 | 360 | ◎ | Good wine |
As can be seen from the above table, the novel aluminum alloy products subjected to surface treatment in the embodiments 1, 3 and 5 of the present invention have good metallic luster, corrosion resistance and weather resistance, and improve mechanical properties such as corrosion resistance, strength and the like of the aluminum alloy substrate.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. A novel aluminum alloy is characterized in that: the aluminum alloy surface treatment device comprises an aluminum alloy body, an anodic oxidation film layer coated on the surface of the aluminum alloy body, and a chromium carbide coating sprayed on the surface of the anodic oxidation film layer, wherein the outer surface of the anodic oxidation film layer contains nano micropores, the pores of the nano micropores are 5-10nm, and the thickness of the anodic oxidation film layer is 5-8 mu.
2. A novel aluminum alloy surface treatment process according to claim 1, characterized in that: the method comprises the following steps:
s1, taking the aluminum alloy base material to hang, degreasing for 60-120S at 45-65 ℃, then washing with water for the first time, then acid washing and demoulding for 60-120S, and washing with water for the second time for later use;
s2, placing the aluminum alloy substrate treated in the step S1 as an anode in electrolyte with the voltage of 8-12V for electrolysis for 25-35min, and then washing with water for later use;
s3, placing the aluminum alloy base material processed in the step S2 in a surfactant solution for ultrasonic treatment for 4-8min to obtain an activated aluminum alloy base material for later use;
s4, sealing the aluminum alloy base material processed in the step S3, heating to 40-60 ℃ and drying for later use;
s5, carrying out PVD pretreatment on the aluminum alloy base material treated in the step S4 for later use;
and S6, performing PVD treatment on the aluminum alloy base material treated in the step S5 to finally obtain the aluminum alloy.
3. The novel aluminum alloy surface treatment process according to claim 2, characterized in that: the PVD pretreatment in step S5 includes the following steps:
e1, transferring the aluminum alloy base material treated in the step S4 to an oil removal tank for oil removal, and then carrying out acid cleaning and washing with clean water for 3-5 times;
e2, transferring the aluminum alloy base material treated in the step E1 into deionized water, ultrasonically cleaning for 60-120s, and then placing the aluminum alloy base material at room temperature for air drying for later use.
4. The novel aluminum alloy surface treatment process according to claim 2, characterized in that: the PVD process in step S6 includes the following steps: and (4) transferring the aluminum alloy base material treated in the step S5 to a coating chamber, heating to the temperature of 120-150 ℃, performing glow cleaning for 60-120S, spraying a chromium carbide layer, and cooling to obtain the novel aluminum alloy.
5. The novel aluminum alloy surface treatment process according to claim 4, characterized in that: the technological parameters when the chromium carbide layer is sprayed are as follows: powder type: chromium carbide 12105-81-6; powder feeding amount (% r.p.m): 15-20 parts of; main gas pressure (argon, psi): 60-80 parts; main gas flow (argon, SCFH): 75-85; auxiliary gas pressure (hydrogen, psi): 60-70 parts of; powder feed gas pressure (argon, Bar): 3.0-3.4; powder feed gas flow (argon, NLPM): 6-8; spray current (a): 510-530; spray voltage (V): 55-65 parts; spraying distance (mm): 100-; lance travel speed (mm/s): 450-650.
6. The novel aluminum alloy surface treatment process according to claim 2, characterized in that: in the step S1, Oreou 161 oil removing powder with the concentration of 50-60g/L is adopted during degreasing treatment.
7. The novel aluminum alloy surface treatment process according to claim 2, characterized in that: and the pickling solution adopted in the pickling in the step S1 is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 3-6%.
8. The novel aluminum alloy surface treatment process according to claim 3, characterized in that: the ultrasonic treatment in the step S3 and the step E2 both adopt the frequency of 4500-6500Hz, the current of 0.8-1.6A, the temperature of 25-30 ℃ and the ultrasonic treatment time of 4-6 min.
9. The novel aluminum alloy surface treatment process according to claim 3, characterized in that: the deoiling liquid in the deoiling groove in the step E1 adopts a sodium carbonate solution with the mass concentration of 4-8%, the current adopted during electrolysis is 8-12A, and the electrolysis treatment time is 3-5 s.
10. The novel aluminum alloy surface treatment process according to claim 3, characterized in that: and E1, wherein the pickling solution adopted in the pickling process is dilute sulfuric acid or dilute nitric acid solution with the mass concentration of 4-8%, and the pickling treatment time is 3-5 s.
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| CN102154644A (en) * | 2011-03-18 | 2011-08-17 | 中国兵器工业第五九研究所 | Preparation method of composite coating for light alloy component |
| CN108441918A (en) * | 2018-04-25 | 2018-08-24 | 合肥市旺友门窗有限公司 | A kind of aluminum alloy surface treatment process |
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| CN102154644A (en) * | 2011-03-18 | 2011-08-17 | 中国兵器工业第五九研究所 | Preparation method of composite coating for light alloy component |
| CN108441918A (en) * | 2018-04-25 | 2018-08-24 | 合肥市旺友门窗有限公司 | A kind of aluminum alloy surface treatment process |
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| CN114606548A (en) * | 2022-03-08 | 2022-06-10 | 江苏奥尔法领创高新科技有限公司 | Automobile aluminum alloy surface modification process |
| CN114606548B (en) * | 2022-03-08 | 2024-01-30 | 江苏奥尔法领创高新科技有限公司 | Automobile aluminum alloy surface modification process |
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