CN112323009B - Surface treatment method of metal section bar - Google Patents
Surface treatment method of metal section bar Download PDFInfo
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- CN112323009B CN112323009B CN202011166877.XA CN202011166877A CN112323009B CN 112323009 B CN112323009 B CN 112323009B CN 202011166877 A CN202011166877 A CN 202011166877A CN 112323009 B CN112323009 B CN 112323009B
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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
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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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
- C23C4/18—After-treatment
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/40—Alkaline compositions for etching other metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
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Abstract
The invention provides a surface treatment method of a metal section, which comprises degreasing and degreasing treatment, microetching treatment, metal deposition treatment and spray powder coating treatment of the surface of the metal section, wherein the metal deposition treatment comprises first metal deposition treatment by using a first metal element, second metal deposition treatment by using a second metal element and third metal deposition treatment by using a third metal element. By carrying out metal deposition treatment and spraying powder coating on the surface of the metal section, various protective layers can be formed on the metal surface, and the metal protective layers and the metal section are integrally formed, so that the metal section has a certain protection effect, and meanwhile, the mechanical property and the service performance of the metal section can be improved; the combination of powder coating further ensures the remarkable corrosion resistance of the metal section, and the first spraying chamber and the second spraying chamber are arranged, so that the spraying quality is ensured, and the production efficiency and the production yield are improved.
Description
Technical Field
The invention relates to the field of metal surface treatment, in particular to a surface treatment method of a metal section.
Background
Because of the characteristics of metals, oxidation reactions, i.e., corrosion products, are liable to occur on surfaces due to external factors, and the most widely used method for suppressing the occurrence of such corrosion products is to form a film on the surfaces, and the metal profiles are liable to suffer from problems such as aging, deformation, and oil stains when used for a long period of time, so that the metal profiles generally require a processing treatment of the surfaces thereof before use. As a method of forming a film on a surface, there is a method of physically forming a film of an inorganic or organic component, a method of forming a film by a chemical reaction such as chromate treatment, or the like. The film formed in this way can protect the plating layer to improve corrosion resistance, blackening resistance and acid resistance of the metal. In addition, the film is provided with high workability or antibacterial properties, so that the workability or antibacterial properties can be improved, and the metal application can be made specific. However, the prior art has generally suffered from the following drawbacks when surface treating metals: the metal surface has a paint film with a certain color by a plurality of electrostatic spraying treatment modes, but the spraying effect is poor, and the adhesive force of the coating is also not ideal; in addition, the problems of uneven plastic spraying and serious waste of coating materials exist, so that the protection effect of metal is poor, and further the corrosion resistance of the metal is poor.
In view of the above, there is still a need to solve the above problems in the field of metal surface treatment.
Disclosure of Invention
Based on the method, in order to solve the problem that corrosion products of oxidation reaction easily occur in metal, a paint film with a certain color is formed on the surface of the metal in a static spraying treatment mode, but the plastic effect is poor, the adhesive force of a coating is also not ideal, and the corrosion resistance is poor, the invention provides a surface treatment method of a metal section, which comprises the following specific technical scheme:
a surface treatment method of a metal profile, comprising the steps of:
carrying out surface oil and ester removal treatment on the metal section;
carrying out microetching treatment on the surface of the metal section after degreasing and degreasing;
placing the metal section bar subjected to microetching treatment into a first spraying chamber for metal deposition treatment;
feeding the metal section subjected to metal deposition treatment into a second spraying chamber, uniformly spraying powder coating, preserving heat at 125-175 ℃ for 10-30 min after spraying, and cooling to room temperature;
the first spraying chamber is internally provided with an induction heating device, the metal deposition treatment comprises a first metal deposition treatment using a first metal element, a second metal deposition treatment using a second metal element and a third metal deposition treatment using a third metal element, and the induction heating device is used for heating the metal to be equal to or greater than the melting temperature of the first metal element, the metal to be equal to or greater than the melting temperature of the second metal element and the metal to be equal to or greater than the melting temperature of the third metal element before the deposition treatment.
Preferably, the surface degreasing and degreasing treatment is as follows: placing the metal profile in a degreasing tank of an aqueous solution added with a degreasing agent, and treating for 10-20 min at the temperature of 40-85 ℃.
Preferably, the degreasing agent comprises the following components in parts by weight: 15-25 parts of sodium hydroxide, 20-25 parts of sodium carbonate, 3-7 parts of sodium tripolyphosphate and 0.5-5 parts of acetone.
Preferably, the addition amount of the oil removing agent is 35g/L-50g/L.
Preferably, the microetching treatment is: and (3) placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 1-5 min at the temperature of 45-75 ℃.
Preferably, the microetching treating agent comprises the following components in parts by weight: 15-30 parts of hydrogen peroxide and 1-5 parts of ammonia water, wherein the adding amount of the microetching treating agent is 25-50 g/L.
Preferably, the first metal element, the second metal element, and the third metal element are all in powder form before the deposition process.
Preferably, the first metal element is Al; the second metal element is Zn; the third metal element is Ni.
Preferably, the time of the first metal deposition process is 5min-10min, the time of the second metal deposition process is 10min-20nin, and the time of the third metal deposition process is 5min-15min.
Preferably, the metal profile is a medium carbon steel plate with a melting temperature of 1470 ℃ to 1500 ℃.
In the scheme, various protective layers can be formed on the surface of the metal through metal deposition treatment and powder coating spraying, and the metal protective layers and the metal profile are integrally formed, so that a certain metal profile protection effect is achieved, and meanwhile, the mechanical properties of the metal profile and the service performance of the metal profile are improved; the combination of powder coating further ensures the remarkable corrosion resistance of the metal section, and the first spraying chamber and the second spraying chamber are arranged, so that the spraying quality is ensured, and the production efficiency and the production yield are improved.
Detailed Description
The present invention will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The surface treatment method of the metal section bar in one embodiment of the invention comprises the following steps:
carrying out surface oil and ester removal treatment on the metal section;
carrying out microetching treatment on the surface of the metal section after degreasing and degreasing;
placing the metal section bar subjected to microetching treatment into a first spraying chamber for metal deposition treatment;
feeding the metal section subjected to metal deposition treatment into a second spraying chamber, uniformly spraying powder coating, preserving heat at 125-175 ℃ for 10-30 min after spraying, and cooling to room temperature;
the first spraying chamber is internally provided with an induction heating device, the metal deposition treatment comprises a first metal deposition treatment using a first metal element, a second metal deposition treatment using a second metal element and a third metal deposition treatment using a third metal element, and the induction heating device is used for heating the metal to be equal to or greater than the melting temperature of the first metal element, the metal to be equal to or greater than the melting temperature of the second metal element and the metal to be equal to or greater than the melting temperature of the third metal element before the deposition treatment.
By carrying out metal deposition treatment and spraying powder coating on the surface of the metal section, various protective layers can be formed on the metal surface, and the metal protective layers and the metal section are integrally formed, so that the metal section has a certain protection effect, and meanwhile, the mechanical property and the service performance of the metal section can be improved; the combination of powder coating further ensures the remarkable corrosion resistance of the metal section, and the first spraying chamber and the second spraying chamber are arranged, so that the spraying quality is ensured, and the production efficiency and the production yield are improved.
In one embodiment, the surface degreasing and degreasing treatment is: placing the metal profile in a degreasing tank of an aqueous solution added with a degreasing agent, and treating for 10-20 min at the temperature of 40-85 ℃.
In one embodiment, the degreasing agent comprises the following components in parts by weight: 15-25 parts of sodium hydroxide, 20-25 parts of sodium carbonate, 3-7 parts of sodium tripolyphosphate and 0.5-5 parts of acetone. Through the synergistic effect of the components, a better oil and ester removing effect can be obtained, and a better surface state of the metal section is provided for subsequent treatment.
In one embodiment, the oil removing agent is added in an amount of 35g/L to 50g/L.
In one embodiment, the microetching process is: and (3) placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 1-5 min at the temperature of 45-75 ℃.
In one embodiment, the microetching agent comprises the following components in parts by weight: 15-30 parts of hydrogen peroxide and 1-5 parts of ammonia water, wherein the adding amount of the microetching treating agent is 25-50 g/L. The microetching treatment is favorable for forming a micropore structure on the surface of the metal section, increasing the adhesion force of the integrated forming between the metal section and the first metal element, and forming a compact metal protection layer on the surface of the metal section.
In one embodiment, the first metal element, the second metal element, and the third metal element are all in powder form prior to the deposition process.
In one embodiment, the first metal element is Al; the second metal element is Zn; the third metal element is Ni. The first metal element is Al element, has good combination degree with the metal section, forms a transition layer with the surface of the metal section, plays a role in dispersion strengthening, further increases the service performance of the metal section, and after the second metal element is arranged, the strength and welding performance of the metal section can be increased, and finally the third metal element is arranged, so that the corrosion resistance of the surface of the metal section is facilitated, and the bonding adhesive force of Zn element and Ni element is high and is not easy to strip.
In one embodiment, the induction heating means comprises an induction heating coil.
In one embodiment, the induction heating coil heats the first metal element, the second metal element, and the third metal element using a frequency equal to or greater than 10000 hertz. The heating coil is disposed such that the first metal element. The second metal element and the third metal element are heated in the first spraying chamber from a powder state to a molten state, and when the metal profile is in the molten state in the moving process, the first metal element in the molten state, the second metal element in the molten state and the third metal element in the molten state can be uniformly coated on the metal profile, and grains in different metal transition layers are finer, and the whole structure is uniform.
In one embodiment, the time of the first metal deposition process is 5min-10min, the time of the second metal deposition process is 10min-20nin, and the time of the third metal deposition process is 5min-15min.
In one embodiment, after the first metal deposition treatment is completed, the second metal deposition treatment is performed after the first metal deposition treatment is left for 20min to 30min, after the second metal deposition treatment is completed, the third metal deposition treatment is performed after the second metal deposition treatment is left for 15min to 20min, and after the third metal deposition treatment is completed, quenching is performed. After one metal deposition treatment is completed, standing for a period of time, and then carrying out the other metal deposition treatment, so that each metal can be facilitated to permeate and deposit on the surface of the other metal, and the stability of integral forming is improved. In the metal deposition process, the deposition amount of each metal element deposition process is related to the production cost and the required function of the metal profile, and thus, the deposition amount of each metal element is not limited in detail herein.
In one embodiment, the metal profile is a medium carbon steel plate with a melting temperature of 1470 ℃ to 1500 ℃.
In one embodiment, the metal profile is preheated to 120-240 ℃ before the first spray booth is fed into the second spray booth.
In one embodiment, the powder coating is a functional coating such as a flame retardant coating, an anti-corrosion coating, an anti-oxidation coating, an abrasion resistant coating, and the like.
In one embodiment, the spraying thickness of the powder coating on the surface of the metal profile is 1mm-3mm.
Embodiments of the present invention will be described in detail below with reference to specific examples.
Example 1:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with the melting temperature of 1470 ℃ as a metal section;
placing the metal profile into a degreasing tank of an aqueous solution added with a degreasing agent, and treating for 10min at the temperature of 40 ℃, wherein the degreasing agent comprises the following components in parts by weight: 15 parts of sodium hydroxide, 20 parts of sodium carbonate, 3 parts of sodium tripolyphosphate and 0.5 part of acetone, wherein the addition amount of the oil removing agent is 35g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 1min at the temperature of 45 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 15 parts of hydrogen peroxide and 1 part of ammonia water, wherein the adding amount of the microetching treating agent is 50g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and performs first metal deposition treatment for 5min by using the melted Al elements; after standing for 20min, heating and melting powdered Zn element by the induction heating coil, and carrying out second metal deposition treatment by using the melted Zn element for 10min; after standing for 15min, heating and melting powdery Ni element by using the induction heating coil, performing third metal deposition treatment by using the molten Ni element for 5min, and quenching after the third metal deposition treatment is completed;
preheating the metal section after metal deposition treatment to 120 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 1mm, preserving heat for 10min at the temperature of 125 ℃ after spraying, and cooling to room temperature.
Example 2:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with the melting temperature of 1500 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 20min at the temperature of 85 ℃, wherein the oil removal agent comprises the following components in parts by weight: 25 parts of sodium hydroxide, 25 parts of sodium carbonate, 7 parts of sodium tripolyphosphate and 5 parts of acetone, wherein the addition amount of the oil removing agent is 50g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 5min at the temperature of 75 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 30 parts of hydrogen peroxide and 5 parts of ammonia water, wherein the adding amount of the microetching treating agent is 50g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and utilizes the molten Al elements to perform first metal deposition treatment for 10min; after standing for 30min, the induction heating coil heats and melts powdered Zn element, and carries out second metal deposition treatment for 20nin by using the melted Zn element; after standing for 20min, heating and melting powdery Ni element by using the induction heating coil, performing third metal deposition treatment by using the molten Ni element for 15min, and quenching after the third metal deposition treatment is completed;
preheating the metal section after metal deposition treatment to 240 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 3mm, preserving heat for 30min at the temperature of 175 ℃ after spraying, and cooling to room temperature.
Example 3:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with a melting temperature of 1480 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 15min at the temperature of 55 ℃, wherein the oil removal agent comprises the following components in parts by weight: 20 parts of sodium hydroxide, 22 parts of sodium carbonate, 4 parts of sodium tripolyphosphate and 3 parts of acetone, wherein the addition amount of the oil removing agent is 40g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 3min at the temperature of 55 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 25 parts of hydrogen peroxide and 3 parts of ammonia water, wherein the adding amount of the microetching treating agent is 35g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and performs first metal deposition treatment by using the melted Al elements for 8min; after standing for 25min, the induction heating coil heats and melts powdered Zn element, and carries out second metal deposition treatment 15nin by using the melted Zn element; after standing for 18min, heating and melting powdery Ni element by using the induction heating coil, performing third metal deposition treatment by using the molten Ni element for 10min, and quenching after the third metal deposition treatment is completed;
preheating the metal section after metal deposition treatment to 150 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 2mm, preserving heat for 20min at the temperature of 150 ℃ after spraying, and cooling to room temperature.
Example 4:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with the melting temperature of 1500 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 20min at the temperature of 60 ℃, wherein the oil removal agent comprises the following components in parts by weight: 22 parts of sodium hydroxide, 23 parts of sodium carbonate, 4 parts of sodium tripolyphosphate and 3 parts of acetone, wherein the addition amount of the oil removing agent is 42g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 4min at the temperature of 65 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 25 parts of hydrogen peroxide and 4 parts of ammonia water, wherein the adding amount of the microetching treating agent is 35g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and performs first metal deposition treatment by using the melted Al elements for 6min; after standing for 26min, the induction heating coil heats and melts powdered Zn element, and carries out second metal deposition treatment 15nin by using the melted Zn element; after standing for 18min, heating and melting powdery Ni element by using the induction heating coil, performing third metal deposition treatment by using the molten Ni element for 12min, and quenching after the third metal deposition treatment is completed;
preheating the metal section after metal deposition treatment to 220 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 3mm, preserving heat for 23min at the temperature of 150 ℃ after spraying, and cooling to room temperature.
Comparative example 1:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with a melting temperature of 1480 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 15min at the temperature of 55 ℃, wherein the oil removal agent comprises the following components in parts by weight: 20 parts of sodium hydroxide, 22 parts of sodium carbonate, 4 parts of sodium tripolyphosphate and 3 parts of acetone, wherein the addition amount of the oil removing agent is 40g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 3min at the temperature of 55 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 25 parts of hydrogen peroxide and 3 parts of ammonia water, wherein the adding amount of the microetching treating agent is 35g/L;
and (3) placing the metal section subjected to microetching treatment into a first spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 2mm, preserving heat at the temperature of 150 ℃ for 20min after spraying, and cooling to room temperature.
Comparative example 2:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with a melting temperature of 1480 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 15min at the temperature of 55 ℃, wherein the oil removal agent comprises the following components in parts by weight: 20 parts of sodium hydroxide, 22 parts of sodium carbonate, 4 parts of sodium tripolyphosphate and 3 parts of acetone, wherein the addition amount of the oil removing agent is 40g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 3min at the temperature of 55 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 25 parts of hydrogen peroxide and 3 parts of ammonia water, wherein the adding amount of the microetching treating agent is 35g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and performs first metal deposition treatment by using the melted Al elements for 8min; the induction heating coil heats and melts powdered Zn element, and performs a second metal deposition treatment 15nin by using the melted Zn element; the induction heating coil heats and melts powdered Ni element, and performs third metal deposition treatment by using the molten Ni element for 10min, and quenching is performed after the third metal deposition treatment is completed;
preheating the metal section after metal deposition treatment to 150 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 2mm, preserving heat for 20min at the temperature of 150 ℃ after spraying, and cooling to room temperature.
Comparative example 3:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with a melting temperature of 1480 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 15min at the temperature of 55 ℃, wherein the oil removal agent comprises the following components in parts by weight: 20 parts of sodium hydroxide, 22 parts of sodium carbonate, 4 parts of sodium tripolyphosphate and 3 parts of acetone, wherein the addition amount of the oil removing agent is 40g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 3min at the temperature of 55 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 25 parts of hydrogen peroxide and 3 parts of ammonia water, wherein the adding amount of the microetching treating agent is 35g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and performs first metal deposition treatment by using the melted Al elements for 8min; after standing for 25min, the induction heating coil heats and melts powdered Zn element, and carries out second metal deposition treatment 15nin by using the melted Zn element, and quenching;
preheating the metal section after metal deposition treatment to 150 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 2mm, preserving heat for 20min at the temperature of 150 ℃ after spraying, and cooling to room temperature.
Comparative example 4:
a surface treatment method of a metal profile, comprising the steps of:
selecting a medium carbon steel plate with a melting temperature of 1480 ℃ as a metal section;
placing the metal profile in an oil removal tank of an aqueous solution added with an oil removal agent, and treating for 15min at the temperature of 55 ℃, wherein the oil removal agent comprises the following components in parts by weight: 20 parts of sodium hydroxide, 22 parts of sodium carbonate, 4 parts of sodium tripolyphosphate and 3 parts of acetone, wherein the addition amount of the oil removing agent is 40g/L;
placing the metal profile in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 3min at the temperature of 55 ℃; wherein the microetching treating agent comprises the following components in parts by weight: 25 parts of hydrogen peroxide and 3 parts of ammonia water, wherein the adding amount of the microetching treating agent is 35g/L;
placing the metal profile subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein an induction heating device is arranged in the first spraying chamber, an induction heating coil is arranged in the induction heating device, and the induction heating coil heats and melts powdery Al elements and performs first metal deposition treatment by using the melted Al elements for 8min; after standing for 25min, heating and melting powdery Ni element by using the induction heating coil, performing second metal deposition treatment by using the molten Ni element for 10min, and quenching after the second metal deposition treatment is completed;
preheating the metal section after metal deposition treatment to 150 ℃, sending the metal section into a second spraying chamber, uniformly spraying polytetrafluoroethylene flame-retardant coating with the thickness of 2mm, preserving heat for 20min at the temperature of 150 ℃ after spraying, and cooling to room temperature.
Test example one: tissue uniformity
The 3mm sections of the medium carbon steel sheets treated in examples 1 to 4 and comparative examples 1 to 4 were subjected to spectral analysis, and were excited every 20mm along the edge, and the test results were shown in Table 1 below.
Table 1:
as is clear from the data analysis in table 1, the surface of the medium carbon steel sheet after the metal deposition treatment of three metal elements still had a uniform texture transition layer, and the interlayer integration effect was excellent, and the non-standing treatment in comparative example 2 resulted in poor uniformity between textures compared with examples, and the surfaces of the medium carbon steel sheets in comparative example 3 and comparative example 4 were subjected to only two metal depositions, but they were inferior to those in examples 1 to 4.
Test example two: resistance to deformation
4 samples of the medium carbon steel plate treated in the example 3, the medium carbon steel plate in the comparative example 1, the medium carbon steel plate in the comparative example 2, the medium carbon steel plate in the comparative example 3 and the medium carbon steel plate in the comparative example 4 are respectively selected as test samples, namely 4 samples of different parts of the aluminum alloy casting rod are selected in the example 3 and are respectively marked as samples 1-4; 4 samples of different parts of the aluminum alloy casting rod are selected in comparative example 1 and are respectively marked as comparative samples A1-4; 4 samples of different parts of the aluminum alloy casting rod are selected in comparative example 2 and are respectively marked as comparative samples B1-4; 4 samples of different parts of the aluminum alloy casting rod are selected in comparative example 3 and are respectively marked as comparative samples C1-4; in comparative example 4, 4 samples of different parts of an aluminum alloy cast bar were selected, and each of the samples, labeled as comparative samples D1-4, were tested by producing a 150mm diameter solid bar on a 90MN extruder under otherwise identical process conditions as measured by the breakthrough pressure of the metal flow through the die orifice during extrusion, and the test results are shown in Table 2 below.
Table 2:
as can be seen from the data analysis in Table 2, the medium carbon steel sheets treated in examples 1-4 have lower denaturation resistance and good service performance. The comparative example 1 has larger denaturation resistance without metal deposition treatment, which shows that the metal deposition treatment process has the promotion effect on the service performance of the medium carbon steel plate; in comparative example 2, after each metal deposition was completed, it was not left to stand for another metal deposition, resulting in a higher denaturation resistance than the medium carbon steel sheet in the examples; only two metal elements of comparative example 3 and comparative example 4 were subjected to the metal deposition treatment, but both produced remarkable treatment effects, which were inferior to those of examples 1 to 4.
Test example three: adhesion force
The medium carbon steel sheet of example 1 was bent and divided into 6 equal areas, RGB values of the material in each equal area were measured by a spectrophotometer, and the offset was calculated, and the adhesion condition of the treated medium carbon steel sheet was judged from the average value delta of the offset, and at the same time, the medium carbon steel sheets of examples 2 to 4, comparative examples 1 to 4, respectively, were examined according to the same examination method. The results are shown in Table 3 below.
Table 3:
it should be noted that: when delta is less than or equal to 65.565, the adhesion of the metal material coating is not good, and when delta is more than 65.565, the adhesion of the metal material coating is good. As can be seen from the analysis of the data in the tables, the treated medium carbon steel sheets of examples 1 to 4 were excellent in adhesion, whereas the treated medium carbon steel sheets of comparative examples 1 to 4 were inferior in adhesion to examples 1 to 4.
Test example four: corrosiveness of
The corrosion resistance of the medium carbon steel plates treated in examples 1-4 and the corrosion resistance of the medium carbon steel plates treated in comparative examples 1-4 were measured by a neutral salt spray test, and the magnesium alloy was subjected to a bare neutral salt spray test according to GB/T1771-2007 standard, with the results shown in Table 4 below.
Table 4:
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as can be seen from the tests in Table 4, PASS indicates that the treated product meets the corrosion resistance requirement, and NG indicates that the treated product has poor corrosion resistance and cannot meet the corrosion resistance requirement. The medium carbon steel sheets treated in examples 1 to 4 had excellent corrosion resistance, while comparative examples 1 to 4 were inferior to examples 1 to 4.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (3)
1. A surface treatment method of a metal profile, characterized by comprising the steps of:
carrying out surface oil and ester removal treatment on the metal section;
carrying out microetching treatment on the surface of the metal section after degreasing and degreasing;
placing the metal section bar subjected to microetching treatment into a first spraying chamber for metal deposition treatment, wherein the metal section bar is required to be preheated to 120-240 ℃ before being sent into a second spraying chamber;
feeding the metal section subjected to metal deposition treatment into a second spraying chamber, uniformly spraying powder coating, preserving heat at 125-175 ℃ for 10-30 min after spraying, and cooling to room temperature;
wherein an induction heating device is arranged in the first spraying chamber, the metal deposition treatment comprises a first metal deposition treatment using a first metal element, a second metal deposition treatment using a second metal element and a third metal deposition treatment using a third metal element, and the metal deposition treatment is heated to be equal to or greater than the melting temperature of the first metal element, to be equal to or greater than the melting temperature of the second metal element and to be equal to or greater than the melting temperature of the third metal element by the induction heating device before the deposition treatment;
after the first metal deposition treatment is finished, standing for 20-30 min, then carrying out the second metal deposition treatment, after the second metal deposition treatment is finished, standing for 15-20 min, then carrying out the third metal deposition treatment, and after the third metal deposition treatment is finished, quenching;
the microetching treatment comprises the following steps: placing the metal section in a microetching treatment tank added with an aqueous solution of a microetching treatment agent, and treating for 1-5 min at the temperature of 45-75 ℃;
the microetching treating agent comprises the following components in parts by weight: 15-30 parts of hydrogen peroxide and 1-5 parts of ammonia water, wherein the adding amount of the microetching treating agent is 25-50 g/L;
the first metal element, the second metal element and the third metal element are all in powder form before the deposition treatment;
the first metal element is Al; the second metal element is Zn; the third metal element is Ni;
the time of the first metal deposition treatment is 5min-10min, the time of the second metal deposition treatment is 10min-20nin, and the time of the third metal deposition treatment is 5min-15min;
the surface oil and ester removing treatment comprises the following steps: placing the metal section into an aqueous solution oil removal tank added with an oil removal agent, and treating for 10-20 min at the temperature of 40-85 ℃;
the degreasing agent comprises the following components in parts by weight: 15-25 parts of sodium hydroxide, 20-25 parts of sodium carbonate, 3-7 parts of sodium tripolyphosphate and 0.5-5 parts of acetone.
2. The surface treatment method of a metal profile according to claim 1, wherein the addition amount of the degreasing agent is 35g/L to 50g/L.
3. The surface treatment method of a metal profile according to claim 1, wherein the metal profile is a medium carbon steel plate having a melting temperature of 1470 ℃ to 1500 ℃.
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