CN112359390A - Preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy - Google Patents
Preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy Download PDFInfo
- Publication number
- CN112359390A CN112359390A CN202011165992.5A CN202011165992A CN112359390A CN 112359390 A CN112359390 A CN 112359390A CN 202011165992 A CN202011165992 A CN 202011165992A CN 112359390 A CN112359390 A CN 112359390A
- Authority
- CN
- China
- Prior art keywords
- aluminum
- wire
- aluminum alloy
- pretreatment
- fluorine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/404—Coated rods; Coated electrodes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0607—Wires
Abstract
The invention relates to a preparation method of MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating, which comprises the steps of drawing an aluminum or aluminum alloy wire rod to form a wire rod with the diameter of 0.8-3.2 mm, sequentially carrying out surface pretreatment, alkali washing, water washing, film forming and heat treatment, and then carrying out layer winding to obtain the MIG welding wire; the surface pretreatment process comprises pre-pretreatment and post-pretreatment, the surface state of the substrate is activated through the pre-pretreatment, so that the surface of the substrate is in an acidic state, the post-pretreatment increases the surface roughness of aluminum and aluminum alloy wires, dense micropores are formed, and the binding force of the coating and the substrate is improved; a fluorine-containing coating is formed on the surface of an aluminum or aluminum alloy wire by a film forming process. The preparation method of the MIG welding wire with the fluorine-containing coating for aluminum and aluminum alloy can reduce the number of weld pores by more than 20 percent and the average wire feeding resistance by more than 35 percent, and is particularly suitable for automatic robot welding.
Description
Technical Field
The invention belongs to the technical field of welding wire manufacturing, and relates to a preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy.
Background
Along with the popularization of the concept of light weight in the automobile manufacturing industry and the vigorous popularization of new energy vehicles, the aluminum alloy becomes one of the substitutes of steel raw materials in the automobile manufacturing industry due to the advantages of high strength, low density and corrosion resistance, the oil consumption per kilometer of an automobile with an all-aluminum white body assembly is proved to be remarkably reduced compared with that of the automobile with a traditional steel white body, but the MIG welding of the aluminum alloy has a series of problems up to now. Because of the large difference of hydrogen solubility between liquid and solid phases of aluminum and aluminum alloy, hydrogen pores are easily formed in the solidification process of the welding seam, and the strength of the connecting part is reduced. In addition, the surface hardness of the aluminum and aluminum alloy welding wires is low, and the aluminum and aluminum alloy welding wires are easy to rub with a wire feeding hose in the welding process to form aluminum scrap accumulation, so that the wire feeding is not smooth, and the wire feeding stability cannot meet the automatic welding requirement of a robot. However, compared with other aluminum alloy welding technologies, the MIG welding has the characteristics of low cost, high deposition efficiency and easier realization of welding automation, so that the improvement of the related performance of the aluminum and aluminum alloy MIG welding wire has important significance.
Disclosure of Invention
The invention aims to solve the problems of more internal pores and poorer wire feeding performance of the deposited metal of the MIG welding wire for aluminum and aluminum alloy in the prior art, and provides a preparation method of the MIG welding wire for aluminum and aluminum alloy with a fluorine-containing coating. The aluminum or aluminum alloy wire rod is subjected to surface pretreatment, and the aluminum or aluminum alloy MIG welding wire with the fluorine-containing coating coated on the surface of the finished welding wire with the fluorine-containing coating is obtained on the surface of the aluminum or aluminum alloy wire rod in a chemical conversion mode, so that the effects of reducing the number of hydrogen holes of a welding seam, reducing wire feeding resistance and improving wire feeding performance can be achieved, the application field of MIG welding of aluminum and aluminum alloy can be further widened by using the aluminum or aluminum alloy MIG welding wire with the fluorine-containing coating, and the welding operation efficiency is improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preparing MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating comprises the following steps of sequentially carrying out surface pretreatment, alkali washing, water washing, film forming and heat treatment on a wire rod formed by drawing an aluminum or aluminum alloy wire rod, and then carrying out layer winding to obtain the MIG welding wire;
the surface pretreatment process comprises pre-pretreatment and post-pretreatment; the pre-treatment is to soak the wire by using a nitric acid solution with the concentration of 8-12 mol%; the concentration of the nitric acid solution is low, the natural oxide film on the surface cannot be removed, and the wire substrate cannot be exposed; the concentration of the nitric acid solution is high, the surface corrosion is serious, and the thickness of the post-pretreatment coating is uneven; the post-pretreatment is to form dense micropores on the surface of the wire rod through anodic oxidation treatment; the aperture of the dense micropores is 15-25 nm, the pitch of the micropores is 300-500 nm, and the depth of the micropores is 10-12 μm; the solution for anodic oxidation treatment is a sulfuric acid solution with the concentration of 12-17 mol%; the concentration of the sulfuric acid solution is too high, the diameter of the micropores is enlarged, and the adsorption efficiency of the coating solution is reduced; the concentration of the sulfuric acid solution is too low, and the size of the micropores cannot achieve the expected effect;
the film forming process is to soak the wire in the film forming composite solution to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent and acidic silica sol (the acidic silica sol is a commercially available chemical raw material, and is also called silicic acid hydrosol, which is a colloidal solution formed by dispersing high-molecular silicon dioxide particles in water, wherein the pH value is 2-4, and SiO is230 to 31 wt% of Na2Content of O<0.006 wt%, the acid silica sol has a specific gravity (25 ℃) of 1.19 to 1.21 and a viscosity (25 ℃)<6mPa·s) Adding the mixture into deionized water, mixing to prepare a solution A, dripping PTFE emulsion into the solution A at a certain speed, ultrasonically oscillating and stirring, and standing at normal temperature (25 ℃) for reaction for a period of time; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 1-5: 15-25: 10-20: 40-70, the film-forming composite liquid prepared according to the proportion range can be efficiently attached to the surface of the welding wire, and the coating is uniform and strong in binding force.
The wire can be completely immersed in each soaking.
As a preferred technical scheme:
according to the preparation method of the MIG welding wire for the aluminum and the aluminum alloy with the fluorine-containing coating, in the surface pretreatment process, the pretreatment time is 30-90 s; the time is too long, the corrosion of the surface of the wire is serious, and the post-treatment coating is not uniform; the natural oxide film on the surface of the wire cannot be removed within a short time, and the natural oxide film leaks out of the matrix;
the post-pretreatment is carried out in an electrolytic cell, and the main process parameters are as follows: the current density is 3-5A/dm2The voltage is 17-35V, the temperature is 7-12 ℃, the oxidation time is 2-5 min, and dense micropores can be obtained only if all parameters are controlled within the range.
According to the preparation method of the MIG welding wire for the aluminum and the aluminum alloy with the fluorine-containing coating, in the film forming process, the wire is soaked in the film forming composite solution for 18-25 min;
the speed of dripping the PTFE emulsion into the solution A is 2.6mL/min, and the concentration of the PTFE emulsion is 40 g/L;
the ultrasonic oscillation stirring is carried out at the temperature of 60 ℃, the power is 500W, the stirring time is 15-20 min, and the reaction time is 1-1.5 h after standing at normal temperature.
According to the preparation method of the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy, in the heat treatment process, the heat treatment temperature is 80-120 ℃, and the heat treatment time is 6-12 hours.
The method for preparing the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy comprises the steps of preparing an Al-Cu alloy, an Al-Mn alloy, an Al-Si alloy, an Al-Mg-Si alloy, an Al-Zn-Mg alloy or an Al-Zn-Mg-Cu alloy;
the diameter of the aluminum or aluminum alloy wire rod is 3.0-9.5 mm;
the diameter of a wire rod formed by drawing an aluminum or aluminum alloy wire rod is 0.8-3.2 mm.
The method for preparing the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy further comprises the steps of ultrasonic cleaning, degreasing, alkali washing and twice water washing before the surface pretreatment step.
In the preparation method of the MIG welding wire for aluminum and aluminum alloy with the fluorine-containing coating, in the ultrasonic cleaning process, the ultrasonic frequency is 40kHz, and the cleaning speed is 4-8 m/s.
The preparation method of the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy adopts the alkali liquor I in the degreasing process, wherein the alkali liquor I is NaOH and Na2CO3The mixed solution (solvent is water), the concentration of NaOH in the mixed solution is 1-20 g/L, Na2CO3The concentration of the degreasing agent is 5-25 g/L, and the degreasing temperature is 30-80 ℃.
According to the preparation method of the MIG welding wire with the fluorine-containing coating for aluminum and aluminum alloy, all water washing procedures are to reversely wash and wipe the surface of the wire by hot water at 40 ℃. The first washing procedure aims at removing alkali liquor I remained on the surface of the aluminum or aluminum alloy wire rod to prepare for the next procedure; the second water washing procedure aims at removing alkaline liquor remained on the surface of the welding wire in the first alkaline washing procedure so as to prepare for the next procedure; the purpose of the third water washing process is to remove the residual alkali liquor in the second alkali washing process.
According to the preparation method of the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy, all alkali washing processes adopt alkali liquor II, the alkali liquor II is NaOH solution with the concentration of 15-20 g/L, the alkali washing temperature is 25-35 ℃, and the alkali washing time is 2-5 min each time.
In the prior art, most of the preparation methods of the welding wire surface coating are to wrap the surface of the welding wire by liquid coating in a direct coating or spraying mode or by solid particles by applying external force, or to combine the liquid coating with the welding wire aluminum or aluminum alloy wire rod by an electroplating method. The liquid coating is directly coated or sprayed, the contact area of the coating and the surface of the welding material is small, and the binding force is poor; coating is prepared on the surface of a welding material by applying external force to pack solid particles, the coating is mainly applied to TIG welding, and the prepared welding wire has a rough surface and is not suitable for MIG welding; although the electroplating method can cause the coating and the aluminum or aluminum alloy wire rod to generate interatomic bonding, the manufacturing process is complicated and the pollution to the environment is large. The invention pretreats the surface of the aluminum or aluminum alloy wire by adopting an anodic oxidation technology to generate dense micropores, thereby being beneficial to the film-forming composite solution to penetrate into the surface of the wire by a certain depth by utilizing a siphon effect, so that the coating is not easy to fall off, and the subsequent heat treatment process is beneficial to the film-forming solution to be fully filled into the micropores, so that gas in the micropores escapes, and further enhancing the binding force between the coating and the wire. Compared with the preparation method in the prior art, the coating formed by the method has stronger bonding force and more stable performance.
According to the invention, when the welding wire with the coating is fed into the wire feeding hose, a solid lubricating film can be formed between the coating and the wire feeding hose after the coating is rubbed, so that the friction factor is reduced, and the wire feeding performance can be improved. The surface of the traditional aluminum and aluminum alloy welding wire is subjected to simple mechanical peeling treatment, the surface still has low hardness and poor wear resistance, and a large amount of aluminum scraps are easily formed by friction with a wire feeding hose, so that the wire feeding performance is poor; wire feeding stability tests show that compared with the traditional aluminum and aluminum alloy MIG welding wire, the minimum wire feeding resistance of the fluorine-containing coating aluminum and aluminum alloy MIG welding wire is reduced by more than 50%, the maximum wire feeding resistance is reduced by more than 34%, and the average wire feeding resistance is reduced by more than 35%.
The fluoride is easy to have metallurgical reaction with the element H of the welding seam in the welding process to form HF, the boiling point of the HF is low, the HF is easy to gasify and escape, and the solubility of the HF is far less than that of the H, so that the quantity of pores of the welding seam can be effectively reduced in the actual welding process of the aluminum and aluminum alloy welding wire with the fluorine-containing coating. Experiments show that compared with commercial uncoated aluminum and aluminum alloy MIG welding wires, the fluorine-containing coated aluminum and aluminum alloy MIG welding wire has the advantage that the number of metal pores in a welding seam is reduced by more than 20%.
Has the advantages that:
the method for preparing the MIG welding wire for the aluminum and the aluminum alloy with the fluorine-containing coating has the advantages that the formed coating is strong in bonding force and stable in performance, the MIG welding wire for the aluminum and the aluminum alloy with the fluorine-containing coating coated on the surface can achieve the effects of reducing the number of hydrogen holes of a welding seam, reducing wire feeding resistance and improving wire feeding performance, and the application prospect is wide.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
A preparation method of MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating is characterized by selecting SAl4043 aluminum alloy wire rods in Al-Si alloy with the diameter of 5.5mm, drawing the aluminum alloy wire rods to form wire rods with the diameter of 1.2mm, sequentially carrying out procedures of ultrasonic cleaning, degreasing, primary water washing, primary alkali washing, secondary water washing, surface pretreatment, secondary alkali washing, tertiary water washing, film forming and heat treatment, and then carrying out layer winding and packaging to obtain the MIG welding wire;
ultrasonic cleaning: the ultrasonic frequency is 40kHz, and the cleaning speed is 4 m/s;
degreasing: alkali liquor I is adopted, and the alkali liquor I is NaOH and Na2CO3The mixed solution of (1), wherein the concentration of NaOH in the mixed solution is 20g/L, and Na is2CO3The concentration of (A) is 5g/L, and the degreasing temperature is 40 ℃;
washing with water: reversely washing and wiping the surface of the wire rod by hot water at 40 ℃ in each washing;
alkali washing: adopting alkali liquor II for each alkali washing, wherein the alkali liquor II is NaOH solution with the concentration of 15g/L, the alkali washing temperature is 35 ℃, and the alkali washing time is 2 min;
surface pretreatment: comprises pre-pretreatment and post-pretreatment; the pre-treatment is carried out at a concentration of 8 mol%Soaking the wire rod for 60s by using a nitric acid solution; the post-pretreatment is carried out in an electrolytic bath, in order to carry out anodic oxidation treatment by using 17 mol% sulfuric acid solution, dense micropores with the aperture of 15nm, the pitch of holes of 300nm and the depth of holes of 10 μm are formed on the surface of the wire rod, and the technological parameters are as follows: current density 5A/dm2The voltage is 35V, the temperature is 7 ℃, and the oxidation time is 2 min;
film forming: soaking the wire in the film-forming composite solution for 18min to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent KH550 and acidic silica sol (pH value is 2, SiO)230 wt% of Na2O content of 0.001 wt%) is added into deionized water to be mixed to prepare a solution A, then PTFE emulsion with the concentration of 40g/L is dripped into the solution A at the speed of 2.6mL/min, and is subjected to ultrasonic oscillation stirring for 18min at the temperature of 60 ℃ and the power of 500W, and then the mixture is subjected to standing reaction for 1h at normal temperature; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 4:23:18: 65;
and (3) heat treatment: the heat treatment temperature is 80 ℃, and the heat treatment time is 12 h.
Example 2
A preparation method of MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating is characterized in that SAl4043 aluminum alloy wire rods in Al-Si alloy with the diameter of 6.0mm are selected and drawn to form wire rods with the diameter of 1.2mm, and then ultrasonic cleaning, degreasing, primary water washing, primary alkali washing, secondary water washing, surface pretreatment, secondary alkali washing, tertiary water washing, film forming and heat treatment are sequentially carried out, and the wire rods are manufactured through layer winding and packaging;
ultrasonic cleaning: the ultrasonic frequency is 40kHz, and the cleaning speed is 5 m/s;
degreasing: alkali liquor I is adopted, and the alkali liquor I is NaOH and Na2CO3The mixed solution of (1), wherein the concentration of NaOH in the mixed solution is 18g/L, and Na is2CO3The concentration of (A) is 10g/L, and the degreasing temperature is 50 ℃;
washing with water: reversely washing and wiping the surface of the wire rod by hot water at 40 ℃ in each washing;
alkali washing: adopting alkali liquor II for each alkali washing, wherein the alkali liquor II is NaOH solution with the concentration of 16g/L, the alkali washing temperature is 33 ℃, and the alkali washing time is 2 min;
surface pretreatment: comprises pre-pretreatment and post-pretreatment; the pre-pretreatment is to soak the wire rod for 60s by using a nitric acid solution with the concentration of 10 mol%; the post-pretreatment is carried out in an electrolytic bath, in order to carry out anodic oxidation treatment by using sulfuric acid solution with the concentration of 16 mol%, dense micropores with the aperture of 18nm, the pitch of holes of 350nm and the depth of holes of 11 μm are formed on the surface of the wire rod, and the technological parameters are as follows: current density 4A/dm2The voltage is 30V, the temperature is 8 ℃, and the oxidation time is 3 min;
film forming: soaking the wire in the film-forming composite solution for 20min to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent KH550 and acidic silica sol (pH value is 2, SiO)230 wt% of Na20.001wt percent of O) is added into deionized water to be mixed to prepare a solution A, then PTFE emulsion with the concentration of 40g/L is dripped into the solution A at the speed of 2.6mL/min, and is stirred for 15min by ultrasonic oscillation with the power of 500W under the temperature condition of 60 ℃, and then is kept stand at normal temperature for reaction for 1.1 h; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 1:15:10: 70;
and (3) heat treatment: the heat treatment temperature is 90 ℃, and the heat treatment time is 10 h.
Example 3
A method for preparing MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy comprises selecting SAl in Al-Mg alloy with diameter of 5.5mm5183Drawing an aluminum alloy wire rod to form a wire rod with the diameter of 1.4mm, sequentially performing ultrasonic cleaning, degreasing, primary water washing, primary alkali washing, secondary water washing, surface pretreatment, secondary alkali washing, tertiary water washing, film forming and heat treatment, and then performing layer winding and packaging to obtain the aluminum alloy wire rod;
ultrasonic cleaning: the ultrasonic frequency is 40kHz, and the cleaning speed is 4 m/s;
degreasing: alkali liquor I is adopted, and the alkali liquor I is NaOH and Na2CO3The mixed solution of (1), wherein the concentration of NaOH in the mixed solution is 15g/L, and Na is2CO3Has a concentration of 15 g-L, the degreasing temperature is 55 ℃;
washing with water: reversely washing and wiping the surface of the wire rod by hot water at 40 ℃ in each washing;
alkali washing: adopting alkali liquor II for each alkali washing, wherein the alkali liquor II is NaOH solution with the concentration of 17g/L, the alkali washing temperature is 30 ℃, and the alkali washing time is 3 min;
surface pretreatment: comprises pre-pretreatment and post-pretreatment; the pre-treatment is to soak the wire for 90s by using a nitric acid solution with the concentration of 12 mol%; the post-pretreatment is carried out in an electrolytic bath, in order to carry out anodic oxidation treatment by using 17 mol% sulfuric acid solution, dense micropores with the aperture of 25nm, the pitch of holes of 500nm and the depth of holes of 12 mu m are formed on the surface of the wire rod, and the technological parameters are as follows: current density 5A/dm2The voltage is 35V, the temperature is 12 ℃, and the oxidation time is 3 min;
film forming: soaking the wire in the film-forming composite solution for 18min to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent KH550 and acidic silica sol (pH 3, SiO)230.3 wt% of Na20.002 wt% of O) is added into deionized water to be mixed to prepare a solution A, then PTFE emulsion with the concentration of 40g/L is dripped into the solution A at the speed of 2.6mL/min, and is subjected to ultrasonic oscillation stirring for 16min at the temperature of 60 ℃ and the power of 500W, and then the mixture is subjected to standing reaction for 1.2h at normal temperature; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 2:16:14: 60;
and (3) heat treatment: the heat treatment temperature is 80 ℃, and the heat treatment time is 12 h.
Example 4
A preparation method of MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating is characterized in that SAl 5183 aluminum alloy wire rods in Al-Mg alloy with the diameter of 3.0mm are selected and drawn to form wire rods with the diameter of 1.4mm, and then ultrasonic cleaning, degreasing, primary water washing, primary alkali washing, secondary water washing, surface pretreatment, secondary alkali washing, tertiary water washing, film forming and heat treatment are sequentially carried out, and the MIG welding wire is prepared by winding and packaging;
ultrasonic cleaning: the ultrasonic frequency is 40kHz, and the cleaning speed is 4 m/s;
degreasing: alkali liquor I is adopted, and the alkali liquor I is NaOH and Na2CO3The mixed solution of (1), wherein the concentration of NaOH in the mixed solution is 10g/L, and Na is2CO3The concentration of (A) is 18g/L, and the degreasing temperature is 60 ℃;
washing with water: reversely washing and wiping the surface of the wire rod by hot water at 40 ℃ in each washing;
alkali washing: adopting alkali liquor II for each alkali washing, wherein the alkali liquor II is NaOH solution with the concentration of 18g/L, the alkali washing temperature is 30 ℃, and the alkali washing time is 4 min;
surface pretreatment: comprises pre-pretreatment and post-pretreatment; the pre-treatment is to soak the wire for 80s by using a nitric acid solution with the concentration of 11 mol%; the post-pretreatment is carried out in an electrolytic bath, in order to carry out anodic oxidation treatment by using 17 mol% sulfuric acid solution, dense micropores with the aperture of 20nm, the pitch of holes of 400nm and the depth of holes of 12 mu m are formed on the surface of the wire rod, and the technological parameters are as follows: current density 4A/dm2The voltage is 35V, the temperature is 10 ℃, and the oxidation time is 5 min;
film forming: soaking the wire in the film-forming composite solution for 18min to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent KH550 and acidic silica sol (pH 3, SiO)230.5 wt% of Na20.001wt percent of O) is added into deionized water to be mixed to prepare a solution A, then PTFE emulsion with the concentration of 40g/L is dripped into the solution A at the speed of 2.6mL/min, and is stirred for 15min by ultrasonic oscillation with the power of 500W under the temperature condition of 60 ℃, and then is kept stand at normal temperature for reaction for 1.3 h; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 3:20:15: 50;
and (3) heat treatment: the heat treatment temperature is 80 ℃, and the heat treatment time is 12 h.
Example 5
A preparation method of MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating is characterized in that SAl 5356 aluminum alloy wire rods in Al-Mg alloy with the diameter of 9.5mm are selected and drawn to form wire rods with the diameter of 1.6mm, and then ultrasonic cleaning, degreasing, primary water washing, primary alkali washing, secondary water washing, surface pretreatment, secondary alkali washing, tertiary water washing, film forming and heat treatment are sequentially carried out, and the wire rods are manufactured through winding and packaging;
ultrasonic cleaning: the ultrasonic frequency is 40kHz, and the cleaning speed is 6 m/s;
degreasing: alkali liquor I is adopted, and the alkali liquor I is NaOH and Na2CO3The mixed solution of (1), wherein the concentration of NaOH in the mixed solution is 8g/L, and Na is2CO3The concentration of (A) is 20g/L, and the degreasing temperature is 65 ℃;
washing with water: reversely washing and wiping the surface of the wire rod by hot water at 40 ℃ in each washing;
alkali washing: alkali liquor II is adopted in each alkali washing, the alkali liquor II is NaOH solution with the concentration of 19g/L, the alkali washing temperature is 26 ℃, and the alkali washing time is 5 min;
surface pretreatment: comprises pre-pretreatment and post-pretreatment; the pre-pretreatment is to soak the wire rod for 60s by using a nitric acid solution with the concentration of 11 mol%; the post-pretreatment is carried out in an electrolytic bath, in order to carry out anodic oxidation treatment by using a sulfuric acid solution with the concentration of 14 mol%, dense micropores with the aperture of 25nm, the pitch of holes of 400nm and the depth of holes of 10 μm are formed on the surface of the wire rod, and the technological parameters are as follows: current density 5A/dm2The voltage is 30V, the temperature is 10 ℃, and the oxidation time is 5 min;
film forming: soaking the wire rod in the film-forming composite solution for 23min to generate a fluorine-containing coating on the surface of the wire rod;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent KH550 and acidic silica sol (pH 4, SiO)2A content of 31 wt% Na20.002 wt% of O) is added into deionized water to be mixed to prepare a solution A, then PTFE emulsion with the concentration of 40g/L is dripped into the solution A at the speed of 2.6mL/min, and is subjected to ultrasonic oscillation stirring for 17min at the temperature of 60 ℃ and the power of 500W, and then the mixture is subjected to standing reaction for 1.4h at normal temperature; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 4:23:17: 45;
and (3) heat treatment: the heat treatment temperature is 100 ℃, and the heat treatment time is 8 h.
Example 6
A preparation method of MIG welding wire for aluminum and aluminum alloy with fluorine-containing coating is characterized in that SAl 5356 aluminum alloy wire rods in Al-Mg alloy with the diameter of 3.0mm are selected and drawn to form wire rods with the diameter of 1.6mm, and then ultrasonic cleaning, degreasing, primary water washing, primary alkali washing, secondary water washing, surface pretreatment, secondary alkali washing, tertiary water washing, film forming and heat treatment are sequentially carried out, and the wire rods are manufactured through winding and packaging;
ultrasonic cleaning: the ultrasonic frequency is 40kHz, and the cleaning speed is 8 m/s;
degreasing: alkali liquor I is adopted, and the alkali liquor I is NaOH and Na2CO3The mixed solution of (1), wherein the concentration of NaOH in the mixed solution is 5g/L, and Na is2CO3The concentration of (A) is 25g/L, and the degreasing temperature is 80 ℃;
washing with water: reversely washing and wiping the surface of the wire rod by hot water at 40 ℃ in each washing;
alkali washing: adopting alkali liquor II for each alkali washing, wherein the alkali liquor II is NaOH solution with the concentration of 20g/L, the alkali washing temperature is 25 ℃, and the alkali washing time is 5 min;
surface pretreatment: comprises pre-pretreatment and post-pretreatment; the pre-pretreatment is to soak the wire rod for 60s by using a nitric acid solution with the concentration of 12 mol%; the post-pretreatment is carried out in an electrolytic bath, in order to carry out anodic oxidation treatment by using 17 mol% sulfuric acid solution, dense micropores with the aperture of 15nm, the pitch of holes of 300nm and the depth of holes of 10 μm are formed on the surface of the wire rod, and the technological parameters are as follows: current density 4A/dm2The voltage is 35V, the temperature is 12 ℃, and the oxidation time is 5 min;
film forming: soaking the wire in the film-forming composite solution for 25min to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: silane coupling agent KH550 and acidic silica sol (pH 3, SiO)230 wt% of Na2O content of 0.001 wt%) is added into deionized water to be mixed to prepare a solution A, then PTFE emulsion with the concentration of 40g/L is dripped into the solution A at the speed of 2.6mL/min, and is stirred for 20min by ultrasonic oscillation at the temperature of 60 ℃ and the power of 500W, and then the mixture is kept stand at normal temperature for reaction for 1.5 h; the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 5:25:20: 40;
and (3) heat treatment: the heat treatment temperature is 120 ℃, and the heat treatment time is 6 h.
The chemical compositions (% by mass) of the aluminum alloy wire rods used in examples 1 to 6 are shown in Table 1.
The number of hydrogen holes of welding seams of current commercial aluminum and aluminum alloy welding wires is generally more than 1.75 percent. The MIG welding wires for aluminum and aluminum alloys having a fluorine-containing coating layer, which were prepared in examples 1 to 6, were welded by a robot according to the welding process parameters in table 2, and the number of pores in the deposited metal was measured as shown in table 3. As can be seen from the data in table 3: compared with the MIG welding wire of the same type sold in the market, the number of the air holes of the MIG welding wire for aluminum and aluminum alloy with the fluorine-containing coating is reduced by more than 20 percent.
The wire feeding resistance of the currently marketed aluminum and aluminum alloy welding wires is within the range of 2.5-15.8N, the resistance difference is more than 9N, and the average resistance is more than 7N. The wire feeding stability testing device is adopted to carry out real-time wire feeding resistance testing on the MIG welding wire for aluminum and aluminum alloy with the fluorine-containing coating prepared in the embodiments 1-6, the results are shown in the table 4, and the related data in the table 4 show that: compared with the similar commercially available MIG welding wire, the minimum wire feeding resistance of the MIG welding wire for aluminum and aluminum alloy with the fluorine-containing coating is reduced by more than 50%, the maximum wire feeding resistance is reduced by more than 34%, and the average wire feeding resistance is reduced by more than 35%.
Comparative example 1
The preparation method of the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy is basically the same as that of the example 1, and is only different from the method that the wire does not undergo a surface pretreatment process; the prepared MIG welding wire for aluminum and aluminum alloy with the fluorine-containing coating is welded by a robot according to welding process parameters in the table 2, the porosity of deposited metal is measured to be 1.75%, a wire feeding stability testing device is adopted to carry out real-time wire feeding resistance testing on the prepared MIG welding wire for aluminum and aluminum alloy with the fluorine-containing coating, the minimum wire feeding resistance is 2.5N, the maximum wire feeding resistance is 13.5N, and the average wire feeding resistance is 7N. Comparing example 1 with comparative example 1, it can be seen that the porosity of comparative example 1 is increased by 28%, and the average wire feeding resistance is increased by 63%, because the welding wire is not subjected to surface pretreatment, the fluoride coating is not firmly combined with the surface of the welding wire, the welding wire is rubbed with a wire feeding wheel during use, and the coating is easy to fall off, thereby increasing the porosity and the average wire feeding resistance.
Comparative example 2
The preparation method of the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy is basically the same as that of the example 1, and is only characterized in that the wire surface pretreatment process only comprises pretreatment; the prepared MIG welding wire for aluminum and aluminum alloys with the fluorine-containing coatings is welded by a robot according to welding process parameters in a table 2, the porosity of deposited metal is measured to be 1.80%, a wire feeding stability testing device is adopted to carry out real-time wire feeding resistance testing on the prepared MIG welding wire for aluminum and aluminum alloys with the fluorine-containing coatings, the minimum wire feeding resistance is 4N, the maximum wire feeding resistance is 15.8N, and the average wire feeding resistance is 8.9N. Comparing example 1 with comparative example 2, it can be seen that the porosity of comparative example 2 is increased by 31%, and the average wire feeding resistance is increased by 1 time, because a natural oxide film exists on the surface of the welding wire which is not subjected to the pre-treatment, and dense micropores of the post-treatment cannot be generated on the natural oxide film, so that the subsequent film covering failure is caused, and the dehydrogenation capability and the wire feeding stability are deteriorated.
Comparative example 3
The preparation method of the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy is basically the same as that of the example 1, and is only characterized in that the wire surface pretreatment process only comprises post-pretreatment; the prepared MIG welding wire for aluminum and aluminum alloys with the fluorine-containing coatings is welded by a robot according to welding process parameters in a table 2, the porosity of deposited metal is measured to be 1.85%, a wire feeding stability testing device is adopted to perform real-time wire feeding resistance testing on the prepared MIG welding wire for aluminum and aluminum alloys with the fluorine-containing coatings, the minimum wire feeding resistance is 3N, the maximum wire feeding resistance is 14N, and the average wire feeding resistance is 8.5N. Comparing example 1 with comparative example 3, it can be seen that the porosity is increased by 35%, and the average wire feeding resistance is increased by nearly 1 time, because the bonding force between the wire and the coating is obviously insufficient without the post-pretreated welding wire, so that the coating of the welding wire drops on the wire feeding wheel, and the dehydrogenation capability is reduced.
Table 1 chemical composition (mass%) of aluminum alloy wire rods used in examples 1 to 6
TABLE 2 welding Process parameters
TABLE 3 hydrogen hole number of welding deposited metal of each example
TABLE 4 test results of wire feeding performance of the welding wire of each example
| Type (B) | Model number | Minimum wire feed resistance/N | Maximum wire feed resistance/N | Wire feed resistance difference/N | Average wire feed resistance/N |
| Example 1 | SAl 4043 | 0.9 | 8.9 | 8.0 | 4.3 |
| Example 2 | SAl 4043 | 0.5 | 8.1 | 7.6 | 3.8 |
| Example 3 | SAl 5183 | 0.7 | 8.7 | 8.0 | 4.5 |
| Example 4 | SAl 5183 | 0.8 | 8.5 | 7.7 | 4.2 |
| Example 5 | SAl 5356 | 0.6 | 8.6 | 8.0 | 4.0 |
| Example 6 | SAl 5356 | 0.5 | 8.4 | 7.9 | 4.6 |
Claims (10)
1. A preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy is characterized by comprising the following steps: the wire rod formed by drawing the aluminum or aluminum alloy wire rod is sequentially subjected to surface pretreatment, alkali washing, water washing, film forming and heat treatment, and then is prepared by layer winding;
the surface pretreatment process comprises pre-pretreatment and post-pretreatment; the pre-treatment is to soak the wire by using a nitric acid solution with the concentration of 8-12 mol%; the post-pretreatment is to form dense micropores on the surface of the wire rod through anodic oxidation treatment; the aperture of the dense micropores is 15-25 nm, the pitch of the micropores is 300-500 nm, and the depth of the micropores is 10-12 μm; the solution for anodic oxidation treatment is a sulfuric acid solution with the concentration of 12-17 mol%;
the film forming process is to soak the wire in the film forming composite solution to generate a fluorine-containing coating on the surface of the wire;
the preparation process of the film-forming composite solution comprises the following steps: adding a silane coupling agent and acidic silica sol into deionized water, mixing to prepare a solution A, then dripping PTFE emulsion into the solution A at a certain speed, ultrasonically oscillating and stirring, and standing at normal temperature for reaction for a period of time;
the volume ratio of the silane coupling agent to the acidic silica sol to the deionized water to the PTFE emulsion is 1-5: 15-25: 10-20: 40-70.
2. The method for preparing the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy according to claim 1, wherein in the surface pretreatment step, the pretreatment time is 30-90 s;
the post-pretreatment is carried out in an electrolytic cell, and the main process parameters are as follows: the current density is 3-5A/dm2The voltage is 17-35V, the temperature is 7-12 ℃, and the oxidation time is 2-5 min.
3. The method for preparing the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy according to claim 1, wherein in the film forming process, the wire is soaked in the film forming composite solution for 18-25 min;
the speed of dripping the PTFE emulsion into the solution A is 2.6mL/min, and the concentration of the PTFE emulsion is 40 g/L;
the ultrasonic oscillation stirring is carried out at the temperature of 60 ℃, the power is 500W, the stirring time is 15-20 min, and the reaction time is 1-1.5 h after standing at normal temperature.
4. The method for preparing the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy according to claim 1, wherein in the heat treatment process, the heat treatment temperature is 80-120 ℃, and the heat treatment time is 6-12 hours.
5. The method of claim 1 wherein the aluminum alloy is an Al-Cu alloy, an Al-Mn alloy, an Al-Si alloy, an Al-Mg-Si alloy, an Al-Zn-Mg alloy, or an Al-Zn-Mg-Cu alloy;
the diameter of the aluminum or aluminum alloy wire rod is 3.0-9.5 mm;
the diameter of a wire rod formed by drawing an aluminum or aluminum alloy wire rod is 0.8-3.2 mm.
6. The method of claim 1 further comprising ultrasonic cleaning, degreasing, alkaline cleaning, and twice water cleaning prior to the surface pretreatment step.
7. The method of claim 6 wherein the ultrasonic cleaning is performed at a frequency of 40kHz and at a speed of 4-8 m/s.
8. The method of claim 7 wherein the degreasing step is performed using alkali solution I, the alkali solution I being NaOH and Na2CO3The concentration of NaOH in the mixed solution is 1-20 g/L, and Na is added2CO3The concentration of the degreasing agent is 5-25 g/L, and the degreasing temperature is 30-80 ℃.
9. The method of claim 8 wherein all of the water washing steps are performed by reverse flushing with hot water at 40 ℃ to wipe the wire surface.
10. The method for preparing the MIG welding wire with the fluorine-containing coating for the aluminum and the aluminum alloy according to claim 9, wherein all alkali washing processes adopt an alkali liquor II, the alkali liquor II is a NaOH solution with the concentration of 15-20 g/L, the alkali washing temperature is 25-35 ℃, and the alkali washing time is 2-5 min each time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165992.5A CN112359390B (en) | 2020-10-27 | 2020-10-27 | Preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165992.5A CN112359390B (en) | 2020-10-27 | 2020-10-27 | Preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112359390A true CN112359390A (en) | 2021-02-12 |
| CN112359390B CN112359390B (en) | 2021-07-06 |
Family
ID=74510776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011165992.5A Active CN112359390B (en) | 2020-10-27 | 2020-10-27 | Preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112359390B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277377A (en) * | 2021-03-03 | 2022-04-05 | 吕承洋 | Method for treating surface of aluminum/aluminum alloy substrate by chemical corrosion and forming film to enable coating to adhere |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB519128A (en) * | 1937-10-31 | 1940-03-18 | Vaw Ver Aluminium Werke Ag | Improved manufacture of coated welding rods of aluminium or aluminium alloys |
| US5097109A (en) * | 1990-02-20 | 1992-03-17 | General Motors Corporation | Insulated aluminum weld fixture and a method of making same |
| JPH115192A (en) * | 1997-06-13 | 1999-01-12 | Kobe Steel Ltd | Mig wire for welding aluminum or aluminum alloy material |
| CN107904576A (en) * | 2017-11-09 | 2018-04-13 | 北京工业大学 | A kind of aluminium of electrochemical plating Zn+Cu/Re composite coatings and the preparation method of aluminium alloy robot welding wire |
| CN109234779A (en) * | 2017-07-10 | 2019-01-18 | 中国兵器工业第五九研究所 | Aluminium alloy high temperature antiplastering synergistic fluoropolymer coating processing method |
| CN110480211A (en) * | 2019-08-21 | 2019-11-22 | 上海工程技术大学 | The aluminium and aluminium alloy TIG welding wire preparation method of Re conversion film are generated by being immersed in matrix surface |
-
2020
- 2020-10-27 CN CN202011165992.5A patent/CN112359390B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB519128A (en) * | 1937-10-31 | 1940-03-18 | Vaw Ver Aluminium Werke Ag | Improved manufacture of coated welding rods of aluminium or aluminium alloys |
| US5097109A (en) * | 1990-02-20 | 1992-03-17 | General Motors Corporation | Insulated aluminum weld fixture and a method of making same |
| JPH115192A (en) * | 1997-06-13 | 1999-01-12 | Kobe Steel Ltd | Mig wire for welding aluminum or aluminum alloy material |
| CN109234779A (en) * | 2017-07-10 | 2019-01-18 | 中国兵器工业第五九研究所 | Aluminium alloy high temperature antiplastering synergistic fluoropolymer coating processing method |
| CN107904576A (en) * | 2017-11-09 | 2018-04-13 | 北京工业大学 | A kind of aluminium of electrochemical plating Zn+Cu/Re composite coatings and the preparation method of aluminium alloy robot welding wire |
| CN110480211A (en) * | 2019-08-21 | 2019-11-22 | 上海工程技术大学 | The aluminium and aluminium alloy TIG welding wire preparation method of Re conversion film are generated by being immersed in matrix surface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277377A (en) * | 2021-03-03 | 2022-04-05 | 吕承洋 | Method for treating surface of aluminum/aluminum alloy substrate by chemical corrosion and forming film to enable coating to adhere |
| CN114277377B (en) * | 2021-03-03 | 2024-03-26 | 吕承洋 | Method for treating surface of aluminum/aluminum alloy substrate by chemical corrosion and forming film to enable surface to be attached by coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112359390B (en) | 2021-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105274545B (en) | A kind of plating of aluminium alloy or the pre-treating method of chemical plating and application thereof | |
| CN112359390B (en) | Preparation method of MIG welding wire with fluorine-containing coating for aluminum and aluminum alloy | |
| CN108560037B (en) | A kind of Boron Containing Low Carbon Steel oxidation film layer and preparation method thereof | |
| CN111058068A (en) | Processing technology of zinc-plated nickel alloy | |
| EP0119608B1 (en) | Coating composite for extended corrosion resistance | |
| CN110552043B (en) | High-corrosion-resistance magnesium alloy hub surface treatment method | |
| CN102978627A (en) | Method for preparing super-hydrophobic surface on magnesium alloy | |
| US20120118748A1 (en) | Method For Forming An Oxide Layer On A Brazed Article | |
| CN101082126A (en) | Local chemical-plating technique for aluminum radiator bores | |
| CN110714219A (en) | Method for electroplating nickel on magnesium alloy micro-arc oxidation surface | |
| CN101280451A (en) | Micro-arc oxidation process of magnesium alloy weld joint | |
| CN111197126A (en) | Porous ternary Cu-ZnNi alloy material and preparation method and application thereof | |
| CN104152898A (en) | Micro-arc oxidation self-assembled chemical nickel-plated coating on surface of magnesium alloy and preparation method of micro-arc oxidation self-assembled chemical nickel-plated coating | |
| JPS6046199B2 (en) | Manufacturing method of surface-treated steel plate for welded cans with high rust resistance | |
| CN106521590A (en) | Aluminum alloy blank and diamond composite electroplating process | |
| KR20090075362A (en) | Method for metal material coating and parts coated by same method | |
| CN114032547B (en) | Alloy surface composite coating and preparation method thereof | |
| CN112680757B (en) | Electroplating nickel plating process of electrode | |
| KR100489640B1 (en) | Electrolyte solution for anodizing and corrosion-resisting coating method of magnesium alloy using the same | |
| CN113089048A (en) | Preparation method and application of protective coating of welding joint | |
| CN211471552U (en) | Coating structure of aluminum alloy die casting | |
| CN110777408B (en) | Hydroxylated nano sealing treatment fluid and preparation method and application thereof | |
| CN110952104B (en) | Method for preparing deep narrow gap consumable electrode gas shielded welding contact tip | |
| CN110370780B (en) | Preparation method of flexible packaging film | |
| CN110894619A (en) | Anodic oxidation electrolyte, application, titanium alloy structure and anodic oxidation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |