CN112720274B - Treatment method for uneven surface color of foamed aluminum - Google Patents

Treatment method for uneven surface color of foamed aluminum Download PDF

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Publication number
CN112720274B
CN112720274B CN202110047686.XA CN202110047686A CN112720274B CN 112720274 B CN112720274 B CN 112720274B CN 202110047686 A CN202110047686 A CN 202110047686A CN 112720274 B CN112720274 B CN 112720274B
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foamed aluminum
plate
steel shot
pickling
washing
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CN112720274A (en
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朱德琳
李帅
张庆福
张淑莉
柳双
侯乐
刘俊峰
刘柱军
李兴宇
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Liaoning Rontec New Material Science & Technology Co ltd
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Liaoning Rontec New Material Science & Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/083—Deburring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • 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
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C23F3/03—Light metals with acidic solutions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention discloses a method for treating uneven surface color of foamed aluminum, in particular to a method for treating uneven surface color of a foamed aluminum plate prepared by melt foaming. The method comprises the steps of hardening the surface of the foamed aluminum plate through a steel structure material sprayed by a high-pressure beam, hoisting the hardened plate into an acid washing solution for acid washing, washing the plate with water, and finally drying. The invention is superior to surface color processing operation modes such as plate color spraying and the like in the aspects of cost and efficiency on the premise of not damaging or reducing the mechanical property of the material and meeting the technical requirements of relevant industrial standards. Because the used treatment materials can be recycled, the cost and the production period are reduced, and meanwhile, the energy is saved and the environment is protected.

Description

Treatment method for uneven surface color of foamed aluminum
Technical Field
The invention relates to a method for treating the surface of foamed aluminum, in particular to a method for treating the surface of foamed aluminum prepared by a melt foaming method to have uneven color.
Background
The foamed aluminum is a new multifunctional product in porous metal materials, has the characteristics of sound absorption, flame retardance, buffering and energy absorption, electromagnetic shielding, damping and the like, and is wide in application range. A plurality of foamed aluminum production enterprises exist at home and abroad, the product quality is greatly the same as or different from each other, although most products can meet the use standard of the building material industry on the material performance,
however, due to the instability of the production process, the randomness of the production environment, the existence of impurities in the aluminum liquid as a raw material for manufacturing the foamed aluminum and other problems, the color uniformity of each sheet of plate cannot be ensured under the condition of continuously producing the foamed aluminum by enterprises, and the foamed aluminum is difficult to be directly used in partial projects, particularly relates to the application of the foamed aluminum plate in the field of decoration engineering.
Disclosure of Invention
The invention aims to provide a method for treating uneven surface color of a foamed aluminum plate surface, which has the advantages of low investment, low cost and environmental protection.
The technical scheme adopted by the treatment method for uneven surface color of the foamed aluminum is as follows: step A: surface hardening treatment, namely striking the surface of the foamed aluminum plate by using high-pressure beam jet steel shots to destroy the original oxide layer so as to form a new uniform oxide layer on the surface of the plate;
and B, step B: acid cleaning, namely placing the plate subjected to surface hardening treatment into acid cleaning solution for acid cleaning, removing oil stains on the surface, and destroying the oxide layer formed after hardening treatment to form a new oxide layer with uniform color;
and C: washing, namely washing the plate with water after acid washing, and washing the surfaces of the two sides of the plate with high-pressure water;
step D: and (4) drying, namely putting the pickled plate into a drying device for drying.
In a preferred embodiment of the method for treating uneven surface color of foamed aluminum according to the present invention, the steel shots in step a are cast steel shots or stainless steel shots.
In a preferred embodiment of the method for treating uneven surface color of foamed aluminum of the present invention, the cast steel shot comprises the following components: 0.85-1.0% of carbon, 0.65-1.1% of manganese, 0.6-1.1% of silicon, not more than 0.02% of sulfur and not more than 0.02% of phosphorus, wherein the hardness of the cast steel shot is 350-450HV, the cast steel shot has the roundness G2-G3, and the size range of the cast steel shot is 150-300 meshes.
In a preferred embodiment of the method for treating uneven surface color of foamed aluminum according to the present invention, the stainless steel shot comprises the following components: 0.4-0.8% of carbon, 0.1-0.3% of manganese, 0.3-1.1% of silicon, not more than 0.03% of sulfur, not more than 0.03% of phosphorus, 400-500HV of hardness of the stainless steel shot, G2-G3 of roundness of the stainless steel shot, and 150-300 meshes of size of the stainless steel shot.
In a preferred embodiment of the method for treating the uneven color on the surface of the foamed aluminum, the pressure of the high-pressure beam in the step A is 0.3MPa to 0.5MPa.
In a preferred embodiment of the treatment method for uneven surface color of foamed aluminum, the feeding rate of the steel shots in the step A is 0.5-0.75m/min, and the treatment times are 1-3 times.
In a preferable embodiment of the treatment method for uneven surface color of foamed aluminum, the acid cleaning solution in the step B is a solution of industrial sulfuric acid with the concentration of 35% and water according to the proportion of 1-3: 1-2, the acid cleaning temperature is 25-40 ℃, and the density of the foamed aluminum plate is not less than 0.35g/cm 3 The pickling time is 15-20min, and the density of the foamed aluminum plate is more than 0.35g/cm 3 The pickling time is 20-30min.
In a preferable embodiment of the treatment method for uneven surface color of foamed aluminum, the washing time in the step C is 5-6MPa of high-pressure water after soaking for 2-3 min.
In a preferred embodiment of the method for treating uneven surface color of foamed aluminum, the step D of drying is to dry the foamed aluminum plate in a drying oven at 100-150 ℃ for 20-30min.
The invention has the beneficial effects that: the steel shots sprayed by the high-pressure beam are beaten on the surface of the plate, so that a new oxide layer is uniformly formed after the oxide layer on the surface of the plate is damaged, burrs on the surface of the plate can be removed, the color is uniform, and the surface strength is improved; and (3) putting the plate subjected to surface hardening treatment into an acid pickling solution for acid pickling, removing oil stains on the surface, destroying the oxide layer formed after hardening treatment, and removing the formed original oxide layer twice to finally form a new oxide layer with uniform color. The acid washing solution treatment method adopted by the invention is superior to the plate color spraying operation in the aspects of cost and efficiency. Meanwhile, the pickling solution can be recycled after being used and treated by a chemical method, so that the production investment is reduced, the production cost is reduced, and the uneven production period of the surface of the foamed aluminum plate is shortened. On the other hand, the treatment method is permanent treatment, the problem that the painted surface of the similar sprayed plate is cracked and peeled off is avoided, the problem of secondary repair of the surface of the foamed aluminum is avoided, and the later maintenance cost is reduced.
Detailed Description
The present invention will now be described more fully hereinafter with reference to specific embodiments, but it should be understood that the embodiments described are merely illustrative of some, but not all, of the principles of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the following examples are not intended to show specific industrial equipment or devices, and all such equipment or devices are conventional in the art.
Furthermore, it is to be understood that one or more method steps mentioned in the present invention do not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between the explicitly mentioned steps; unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying each method step, and does not limit the order of the method steps or the scope of the implementation of the present invention, and the relative relationship between the method steps and the corresponding changes or additions may be changed without substantially changing the technical content of the present invention.
The first embodiment is as follows:
the first step is as follows: the sand material that adopts high pressure to restraint injection carries out hardening treatment to foamed aluminum plate surface steel structure material, and the sand material adopts cast steel shot, and the composition that can adopt is: the content of carbon (C) is 0.85-1.0%, the content of manganese (Mn) is 0.65-1.1%, the content of silicon (Si) is 0.6-1.1%, the content of sulfur (S) is less than 0.02%, the content of phosphorus (P) is less than 0.02%, the hardness of the cast steel shot is ensured to be 350HV to ensure the degree of hardening treatment, and the degree of roundness of the cast steel shot is G2; the size is 150 meshes, the cast steel shots with the above components are uniformly sprayed on the surface of the foamed aluminum plate by a sand material spraying device, the pressure of each nozzle of the spraying pressure device is 0.5MPa, the feeding speed of the sand material is 0.5m/min, and the above operation treatment ensures that the plates on the front side and the back side of the foamed aluminum plate to be treated are respectively sprayed for 1 time.
The second step is that: and (5) pickling the hardened plate. Mixing industrial sulfuric acid with the concentration of 35% and water according to the ratio of 2: 1 at normal temperature, slowly pouring the sulfuric acid into a water tank along the wall of the water tank during mixing, continuously stirring to release heat so as to prevent the sulfuric acid from splashing to hurt people, and placing the sulfuric acid at normal temperature for pickling; the foamed aluminum plates are clamped at intervals by a clamp or are arranged in a tool basket or basket, the clamped foamed aluminum plates or the tool basket or basket are hung in a pickling tank for pickling, an interval is reserved between the foamed aluminum plates arranged by the clamp or the tool to ensure that the surfaces of the foamed aluminum plates can be fully contacted with a proportioned sulfuric acid solution, the pickling temperature can be controlled at 25 ℃, the density of the foamed aluminum plates is 0.32g/cm < 3 >, and the pickling time is 15 minutes.
The third step: and (3) hoisting the pickled foamed aluminum plate into a clean water tank for cleaning for 2 minutes, and then slowly hoisting the foamed aluminum plate out of the clean water tank and cleaning the surfaces of the two sides of the foamed aluminum plate by using a high-pressure water column of 5Mpa.
Finally, the cleaned foamed aluminum plate is placed in a drying box with the temperature of 100-150 ℃ for drying and heat preservation for 20 minutes, and the above treatment process is completed.
The second embodiment:
the first step is as follows: the sand material that adopts high pressure to restraint injection carries out hardening treatment to foamed aluminum plate surface steel structure material, and the sand material adopts cast steel shot, and the concrete composition can be: the content of carbon (C) is 0.85-1.1%, the content of manganese (Mn) is 0.65-1.1%, the content of silicon (Si) is 0.6-1.1%, the content of sulfur (S) is not more than 0.02%, the content of phosphorus (P) is not more than 0.02%, the hardness of the cast steel shot is ensured to be 400HV to ensure the degree of hardening treatment, and the degree of roundness of the cast steel shot is G2; the size is 200 meshes, the cast steel shots with the components are uniformly sprayed on the surface of the foamed aluminum plate by a sand material spraying device, the pressure of each nozzle of the spraying pressure device is 0.4MPa, the feeding speed of the sand material is 0.6m/min, and the above operation treatment ensures that the plates on the front side and the back side of the foamed aluminum plate to be treated are respectively sprayed for 2 times.
The second step: and (5) pickling the hardened plate. Mixing industrial sulfuric acid with the concentration of 35% and water according to the ratio of 3: 2 at normal temperature, slowly pouring the sulfuric acid into a water tank along the wall of the water tank during mixing, continuously stirring to release heat so as to prevent the sulfuric acid from splashing to hurt people, and placing the sulfuric acid at normal temperature for pickling; clamping foamed aluminum plates at intervals by using a clamp, or loading the foamed aluminum plates into a tool basket or basket, hoisting the clamped foamed aluminum plates or the tool basket or basket into a pickling tank for pickling, and reserving intervals between the foamed aluminum plates loaded by using the clamp or the tool to ensure that the surfaces of the foamed aluminum plates can be fully contacted with a proportioned sulfuric acid solution, wherein the pickling temperature is controlled at 30 ℃, and the density of the foamed aluminum plates is 0.40g/cm 3 The pickling time was 20 minutes.
The third step: and (3) hoisting the pickled foamed aluminum plate into a clean water tank for cleaning for 2 minutes, and then slowly hoisting the foamed aluminum plate out of the clean water tank and simultaneously cleaning the surfaces of the two sides of the foamed aluminum plate by using a high-pressure water column of 6 Mpa.
Finally, the cleaned foamed aluminum plate is placed in a drying box with the temperature of 100-150 ℃ for drying and heat preservation for 25 minutes, and the above treatment process is completed.
Example three:
the first step is as follows: the sand material that adopts high pressure to restraint injection carries out hardening treatment to foamed aluminum plate surface steel structure material, and the sand material adopts cast steel shot, and the concrete composition can be: the content of carbon (C) is 0.85-1.1%, the content of manganese (Mn) is 0.65-1.1%, the content of silicon (Si) is 0.6-1.1%, the content of sulfur (S) is not more than 0.02%, the content of phosphorus (P) is not more than 0.02%, the hardness of the cast steel shot is ensured to be 450HV to ensure the degree of hardening treatment, and the polishing roundness of the cast steel shot is G3; the size is 350 meshes, the cast steel shots with the components are uniformly sprayed on the surface of the foamed aluminum plate by a sand material spraying device, the pressure of each nozzle of the spraying pressure device is 0.3MPa, the feeding speed of the sand material is 0.7m/min, and the above operation treatment ensures that the plates on the front side and the back side of the foamed aluminum plate to be treated are respectively sprayed for 3 times.
The second step is that: and (5) pickling the hardened plate. Mixing industrial sulfuric acid with the concentration of 35% and water according to the proportion of 1: 1 at normal temperature, slowly pouring the sulfuric acid into a water tank along the wall of the water tank during mixing, continuously stirring to release heat so as to prevent the sulfuric acid from splashing to hurt people, and placing the sulfuric acid at normal temperature for pickling; clamping the foamed aluminum plates at intervals by using a clamp, or loading the foamed aluminum plates into a tool basket or basket, hoisting the clamped foamed aluminum plates or the tool basket or basket into a pickling tank for pickling, and reserving an interval between the foamed aluminum plates loaded by using the clamp or the tool to ensure that the surfaces of the foamed aluminum plates can be fully contacted with a proportioned sulfuric acid solution, wherein the pickling temperature is controlled to be 40 ℃, and the density of the foamed aluminum plates is 0.56g/cm 3 The acid washing time was 30 minutes.
The third step: and (3) hoisting the pickled foamed aluminum plate into a clean water tank for cleaning for 3 minutes, and then slowly hoisting the foamed aluminum plate out of the clean water tank and cleaning the surfaces of the two sides of the foamed aluminum plate by using a high-pressure water column of 6 Mpa.
Finally, the cleaned foamed aluminum plate is placed in a drying oven with the temperature of 100-150 ℃ for drying and heat preservation for 30 minutes, and the above treatment process is completed.
Example four:
the first step is as follows: the sand material that adopts high pressure to restraint injection carries out hardening treatment to foamed aluminum plate surface steel structure material, and the sand material adopts stainless steel ball, and the concrete composition can be: the content of carbon (C) is 0.4-0.8%, the content of manganese (Mn) is 0.1-0.3%, the content of silicon (Si) is 0.3-1.1%, the content of sulfur (S) is not more than 0.03%, the content of phosphorus (P) is not more than 0.03%, the hardness of the stainless steel shot is ensured to be 400HV to ensure the degree of hardening treatment, and the polishing roundness of the stainless steel shot is G3; the size is 150 meshes, the stainless steel shots with the above components are uniformly sprayed on the surface of the foamed aluminum plate by a sand material spraying device, the pressure of each nozzle of the spraying pressure device is 0.5MPa, the feeding speed of the sand material is 0.5m/min, and the above operation treatment ensures that the plates on the front side and the back side of the foamed aluminum plate to be treated are respectively sprayed for 1 time.
The second step is that: and (5) pickling the hardened plate. Mixing industrial sulfuric acid with the concentration of 35% and water according to the ratio of 2: 1 at normal temperature, slowly pouring the sulfuric acid into a water tank along the wall of the water tank during mixing, continuously stirring to release heat so as to prevent the sulfuric acid from splashing to hurt people, and placing the sulfuric acid at normal temperature for pickling; clamping the foamed aluminum plates at intervals by using a clamp, or loading the foamed aluminum plates into a tool basket or basket, hoisting the clamped foamed aluminum plates or the tool basket or basket into a pickling tank for pickling, and reserving an interval between the foamed aluminum plates loaded by using the clamp or the tool to ensure that the surfaces of the foamed aluminum plates can be fully contacted with a proportioned sulfuric acid solution, wherein the pickling temperature is controlled to be 25 ℃, and the density of the foamed aluminum plates is 0.35g/cm 3 The acid washing time was 15 minutes.
The third step: and (3) hoisting the pickled foamed aluminum plate into a clean water tank for cleaning for 2 minutes, and then slowly hoisting the foamed aluminum plate out of the clean water tank and cleaning the surfaces of the two sides of the foamed aluminum plate by using a high-pressure water column of 5Mpa.
And finally, putting the cleaned foamed aluminum plate into a drying oven at the temperature of 100-150 ℃ for drying and heat preservation for 20 minutes to finish the above treatment process.
Example five:
the first step is as follows: the sand material that adopts high pressure to restraint injection carries out hardening treatment to foamed aluminum plate surface steel structure material, and the sand material adopts stainless steel ball, and the concrete composition can be: the content of carbon (C) is 0.4-0.8%, the content of manganese (Mn) is 0.1-0.3%, the content of silicon (Si) is 0.3-1.1%, the content of sulfur (S) is not more than 0.03%, the content of phosphorus (P) is not more than 0.03%, the hardness of the stainless steel shot is ensured to be 450HV to ensure the degree of hardening treatment, and the polishing roundness of the stainless steel shot is G3; the size is 200 meshes, the stainless steel shots with the above components are uniformly sprayed on the surface of the foamed aluminum plate by a sand material spraying device, the pressure of each nozzle of the spraying pressure device is 0.6MPa, the feeding speed of the sand material is 0.6m/min, and the above operation treatment ensures that the plates on the front side and the back side of the foamed aluminum plate to be treated are respectively sprayed for 2 times.
The second step is that: will be provided withAnd (5) pickling the hardened plate. Mixing 35% industrial sulfuric acid and water at a ratio of 3: 2 at normal temperature, slowly pouring the sulfuric acid into a water tank along the wall of the water tank during mixing, continuously stirring to release heat so as to prevent the sulfuric acid from splashing and hurting people, and pickling after the sulfuric acid is placed at normal temperature; clamping foamed aluminum plates at intervals by using a clamp, or loading the foamed aluminum plates into a tool basket or basket, hoisting the clamped foamed aluminum plates or the tool basket or basket into a pickling tank for pickling, and reserving intervals between the foamed aluminum plates loaded by using the clamp or the tool to ensure that the surfaces of the foamed aluminum plates can be fully contacted with a proportioned sulfuric acid solution, wherein the pickling temperature is controlled at 30 ℃, and the density of the foamed aluminum plates is 0.38g/cm 3 The acid washing time was 20 minutes.
The third step: and (3) hoisting the pickled foamed aluminum plate into a clean water tank for cleaning for 2 minutes, and then slowly hoisting the foamed aluminum plate out of the clean water tank and cleaning the surfaces of the two sides of the foamed aluminum plate by using a high-pressure water column of 6 Mpa.
Finally, the cleaned foamed aluminum plate is placed in a drying oven with the temperature of 100-150 ℃ for drying and heat preservation for 25 minutes, and the above treatment process is completed.
Example six:
the first step is as follows: the sand material that adopts high pressure to restraint injection carries out hardening treatment to foamed aluminum plate surface steel structure material, and the sand material adopts stainless steel shot, and the concrete composition can be: the content of carbon (C) is 0.4-0.8%, the content of manganese (Mn) is 0.1-0.3%, the content of silicon (Si) is 0.3-1.1%, the content of sulfur (S) is not more than 0.03%, the content of phosphorus (P) is not more than 0.03%, the hardness of the stainless steel shot is ensured to be 500HV to ensure the degree of hardening treatment, and the polishing roundness of the stainless steel shot is G3; the size is 300 meshes, the stainless steel shots with the components are uniformly sprayed on the surface of the foamed aluminum plate by a sand material spraying device, the pressure of each nozzle of the spraying pressure device is 0.5MPa, the feeding speed of the sand material is 0.3m/min, and the above operation treatment ensures that the plates on the front side and the back side of the foamed aluminum plate to be treated are respectively sprayed for 3 times.
The second step is that: and (5) pickling the hardened plate. Under the condition of normal temperature, industrial sulfuric acid with the concentration of 35 percent and water are mixed according to the proportion of 1: 1,when mixing, slowly pouring the sulfuric acid into the water tank along the wall of the water tank, continuously stirring to release heat so as to prevent the sulfuric acid from splashing to hurt people, and placing the sulfuric acid at normal temperature for pickling; clamping foamed aluminum plates at intervals by using a clamp, or loading the foamed aluminum plates into a tool basket or basket, hoisting the clamped foamed aluminum plates or the tool basket or basket into a pickling tank for pickling, and reserving intervals between the foamed aluminum plates loaded by using the clamp or the tool to ensure that the surfaces of the foamed aluminum plates can be fully contacted with a proportioned sulfuric acid solution, wherein the pickling temperature is controlled at 40 ℃, and the density of the foamed aluminum plates is 0.50g/cm 3 The pickling time was 30 minutes.
The third step: and (3) hoisting the pickled foamed aluminum plate into a clean water tank for cleaning for 3 minutes, and then slowly hoisting the foamed aluminum plate out of the clean water tank and cleaning the surfaces of the two sides of the foamed aluminum plate by using a high-pressure water column of 6 Mpa.
Finally, the cleaned foamed aluminum plate is placed in a drying oven with the temperature of 100-150 ℃ for drying and heat preservation for 30 minutes, and the above treatment process is completed.
Foamed aluminum plate performance index subjected to surface color treatment
Figure GDA0003954107280000081
In summary, the following steps: the invention can effectively solve the problem that the surface color of the foamed aluminum plate is not uniform, and the invention is superior to surface color treatment operation modes such as plate color spraying and the like in the aspects of cost and efficiency on the premise of not damaging or reducing the mechanical property of the material and meeting the technical requirements of relevant industrial standards. Because the used treatment materials can be recycled, the cost and the production period are reduced, and meanwhile, the energy is saved and the environment is protected.

Claims (9)

1. A treatment method for uneven surface color of foamed aluminum comprises the following steps:
step A: surface hardening treatment, namely striking the surface of the foamed aluminum plate by using high-pressure beam jet steel shots to destroy the original oxide layer so as to form a new uniform oxide layer on the surface of the plate;
and B: acid cleaning, namely placing the plate subjected to surface hardening treatment into acid cleaning solution for acid cleaning, removing oil stains on the surface, and destroying the oxide layer formed after hardening treatment to form a new oxide layer with uniform color;
and C: washing, namely washing the plate with water after acid washing, and washing the surfaces of the two sides of the plate with high-pressure water;
step D: and (4) drying, namely putting the pickled plate into a drying device for drying.
2. The method as claimed in claim 1, wherein the steel shot in step A is cast steel shot or stainless steel shot.
3. The method for treating the uneven surface color of the foamed aluminum according to claim 2, wherein the cast steel shot comprises the following components: 0.85-1.0% of carbon, 0.65-1.1% of manganese, 0.6-1.1% of silicon, not more than 0.02% of sulfur and not more than 0.02% of phosphorus, wherein the hardness of the cast steel shot is 350-450HV, the cast steel shot has the roundness G2-G3, and the size range of the cast steel shot is 150-300 meshes.
4. The method for treating the uneven surface color of the foamed aluminum according to claim 2, wherein the stainless steel shot comprises the following components: the stainless steel ball comprises, by weight, 0.4-0.8% of carbon, 0.1-0.3% of manganese, 0.3-1.1% of silicon, not more than 0.03% of sulfur, not more than 0.03% of phosphorus, 400-500HV of hardness of the stainless steel ball, G2-G3 of roundness of the stainless steel ball, and 150-300 meshes of size of the stainless steel ball.
5. The method as claimed in claim 3 or 4, wherein the pressure of the high pressure beam in step A is 0.3MPa-0.5MPa.
6. The method as claimed in claim 2, wherein the feeding rate of the steel shot in the step A is 0.5-0.75m/min, and the number of treatments is 1-3.
7. The method as claimed in claim 6, wherein the pickling solution in step B is a mixture of 35% industrial sulfuric acid and water at a ratio of 1-3: 1-2, the pickling temperature is 25-40 ℃, and the density of the foamed aluminum plate is not less than 0.35g/cm 3 The pickling time is 15-20min, and the density of the foamed aluminum plate is more than 0.35g/cm 3 The pickling time is 20-30min.
8. The method for treating uneven color on the surface of foamed aluminum according to claim 7, wherein the water washing time in the step C is soaking for 2-3min, and then washing with 5-6MPa high-pressure water.
9. The method as claimed in claim 8, wherein the drying step is carried out by drying the aluminum foam plate in a drying oven at 100-150 ℃ for 20-30min.
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CN110616421A (en) * 2019-10-22 2019-12-27 徐州轩辕铝业有限公司 Surface treatment process of small aluminum profile

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