WO2022151652A1 - 金属上色处理工艺 - Google Patents

金属上色处理工艺 Download PDF

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WO2022151652A1
WO2022151652A1 PCT/CN2021/100668 CN2021100668W WO2022151652A1 WO 2022151652 A1 WO2022151652 A1 WO 2022151652A1 CN 2021100668 W CN2021100668 W CN 2021100668W WO 2022151652 A1 WO2022151652 A1 WO 2022151652A1
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metal
aluminum alloy
metal surface
treatment process
coloring treatment
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PCT/CN2021/100668
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French (fr)
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邓宇
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邓宇
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • 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
    • 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
    • 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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • C25D11/243—Chemical after-treatment using organic dyestuffs
    • 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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • C25D11/246—Chemical after-treatment for sealing layers

Definitions

  • the present invention relates to a metal processing process, more particularly, to a coloring process applied in metal processing.
  • conventional anodized coloring has the limitation of a single color.
  • Conventional anodizing can only color a single color, such as red, orange, yellow, green, cyan, blue, red, black, gray and other colors. Only one color on the positive workpiece can be reflected in the vision, which cannot meet the multi-color requirements of the product, and the coloring is not firm. After a period of use, the process problem of easy decolorization and discoloration occurs.
  • the technical purpose of the present invention is to overcome the difficulties in fixing the color and the single coloring in the anodic oxidation coloring in the prior art, and provide a kind of multicolor coloring treatment for the metal surface, and the pigment and the metal are passed through the physical Coloring and chemical complexing to form an integrated color anode metal coloring process.
  • the technical scheme of the present invention is:
  • the aluminum alloy workpiece is placed on a titanium material hanger with good alkali resistance, acid resistance and electrical conductivity.
  • step a 15%-30% nitric acid-containing aqueous solution is used for cleaning, the nitric acid aqueous solution is heated to 60-70 ° C, and the workpiece is soaked for 3-5 minutes to remove oil and wax stains on the surface of the workpiece.
  • the fine holes are 0.01-0.03 ⁇ m in diameter.
  • the color ink contains dye particles with a diameter of 0.0015-0.003 ⁇ m.
  • Sodium hydroxide 200g/L, sodium nitrate 50g/L.
  • the dye is a dye complexed with metal ions; the aluminum hydroxide in the porous layer is physically adsorbed; it is chemically complexed into colored metal salts; it becomes a part of the aluminum alloy.
  • the color anode is subjected to special hole expansion technology and special raw film anode parameters on the anode film layer to consolidate the adhesion, compactness and wear resistance of the toner. After coloring, a special printer is used for coloring with weak solvent ink. After coloring Then carry out the sealing process. After sealing the hole, use the baking line to dry it.
  • FIG. 1 is a process flow diagram of an embodiment of the present invention .
  • a titanium hanger is used to fix the workpiece, and the titanium hanger has good alkali resistance and acid resistance, and a nitric acid solution in which 20L of nitric acid is mixed with 100L of water is used, and heated to 60-70° C. The workpiece is soaked for 3 to 5 minutes to remove oil and wax stains on the surface of the workpiece, and degreasing the surface of the aluminum alloy metal.
  • the surface of the aluminum alloy metal is alkalized and the alkalized compound is neutralized;
  • the alkaline washing solution is prepared as follows: 200g of sodium hydroxide and 50g of sodium nitrate are dissolved in 1 liter of water; heated to 80 ⁇ 90 °C to remove the surface of the product Natural oxide layer to adjust the brightness of the product surface; or sodium hydroxide: 380g dissolved in 1 liter of water, heated to 80 ⁇ 90 °C, to remove the natural oxide layer on the product surface and adjust the brightness of the product surface;
  • the solution for neutralizing alloy surface chemicals is prepared as: 1. nitric acid weight percentage: 30%, 2. chromic anhydride weight percentage: 5%, 3. water weight percentage: 65%; neutralize alkali washing at room temperature to remove alkali Compound on the surface after washing.
  • the aluminum alloy metal surface is chemically polished and the chemical polishing compound is neutralized; the chemical polishing solution is formulated as: 1.
  • the weight percentage of sulfuric acid (content 98%) is 16%, 2.
  • the weight percentage of phosphoric acid (content 85%) is 80%, 3.
  • Nitric acid (content 98%) is 4% by weight, soak the product at a temperature of 90 ⁇ 110 °C to adjust the brightness of the product surface;
  • the solution for neutralizing the chemical polishing compound is formulated as: 1.
  • the weight percentage of nitric acid is 30% , 2.
  • the weight percentage of chromic anhydride is 5%, 3.
  • the weight percentage of clear water is 65%; the compound to be neutralized at room temperature.
  • Anodize the metal surface and neutralize the anodized chemicals Anodize the aluminum alloy metal surface for more than 45 minutes to form tiny holes on the aluminum alloy metal surface.
  • the solution used for anodizing 150 ⁇ 200g per liter of water A solution of 10 ⁇ 15g of sulfuric acid and alumina; the temperature of the solution is controlled at 18 ⁇ 20°C, and the anodizing treatment is carried out by using a refrigerator, a positive flow device, a lead plate + copper plate + PP tank fixing equipment. About 7.7 billion nano-scale holes are anodized on the surface of aluminum per square centimeter, and the fine holes are 0.01-0.03 ⁇ m in diameter. It is printed and dyed, and it becomes the only metal that can be dyed. Use 30% by weight of nitric acid, 5% by weight of chromic anhydride and 65% of clear water to prepare a neutralized oxidizing acid solution, and carry out micropore expansion at room temperature.
  • a color process pattern is printed on the metal surface by using a complex ion nano weak solvent color ink by a printer, and the color ink contains dye particles with a diameter of 0.0015-0.003 ⁇ m. Color ink enters into tiny holes; air-dry the aluminum alloy surface that has finished printing color patterns. The ambient temperature was controlled below 26 °C, and the water was cut with an air knife for 30 minutes.
  • the dye is a dye that complexes metal ions; it is physically adsorbed by aluminum hydroxide in the porous layer; it is then chemically complexed into color-developing metal salts; it becomes a part of the aluminum alloy; and the color anode is in the anode
  • the film layer is subjected to special enlarging technology and special film anode parameters to consolidate the adhesion, compactness and wear resistance of the toner.
  • a special printer and weak solvent ink are used for coloring treatment, and the holes are sealed after coloring. deal with. After sealing the hole, use the baking line to dry it.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

可对金属表面多色着色处理并且将颜料与金属通过物理着色及化学络合形成一体的彩色阳极金属上色处理工艺。金属上色处理工艺，包括有如下步骤：对铝合金金属表面去油；铝合金金属表面碱化处理并对碱化物进行中和；铝合金金属表面进行化学抛光并中和化学抛光的化合物；对金属表面进行阳极氧化处理，并中和阳极氧化的化学物，在铝合金金属表面形成细小孔洞；通过打印机采用络合离子纳米弱溶剂墨水对金属表面进行打印彩色工艺图案，彩色墨水进入细小孔洞中；对完成打印彩色图案的铝合金表面风干处理。彩色阳极在阳极膜层进行特殊扩孔技术及特殊生膜阳极参数巩固色粉的附着性及致密性、耐磨性。

Description

金属上色处理工艺 技术领域
本发明涉及一种金属处理工艺，更具体的说，涉及一种应用于金属工艺处理中的上色工艺。
 背景技术
在现有技术中，常规阳极氧化着色的具有颜色单一的局限性，常规阳极氧化只能着单色，如红、橙、黄、绿、青、蓝、祡、黑、灰等颜色，一个氧阳工件上只能上一种颜色体现在视觉中，不能满足产品的多色彩需求，也存在着着色不牢固，在使用一段时间后，出现易脱色及变色的工艺问题。
 技术问题
有鉴于此，本领域的阳极氧化着色存在着的颜色单一及易老化脱变色的技术缺陷，成为本领域技术人员急待解决的技术问题。
 技术解决方案
本发明的技术目的是克服现有技术中，金属表面处理中阳极氧化着色存在着的固色困难及着色单一的技术问题，提供一种可对金属表面多色着色处理并且将颜料与金属通过物理着色及化学络合形成一体的彩色阳极金属上色处理工艺。
为实现以上技术目的，本发明的技术方案是：
金属上色处理工艺，其特征是，包括有如下步骤：
g.    对铝合金金属表面去油；
h.    铝合金金属表面碱化处理并对碱化物进行中和；
i.     铝合金金属表面进行化学抛光并中和化学抛光的化合物；
j.     对金属表面进行阳极氧化处理，并中和阳极氧化的化学物，在铝合金金属表面形成细小孔洞；
k.    通过打印机采用络合离子纳米弱溶剂墨水对金属表面进行打印彩色工艺图案，彩色墨水进入细小孔洞中；
l.     对完成打印彩色图案的铝合金表面风干处理。
进一步的，所述a步骤中，采用耐碱耐酸导电性能较好的钛材质挂架放置铝合金工件。
进一步的，所述a步骤中，采用15%-30%的含硝酸水溶液进行清洗，对硝酸水溶液加温到60~70℃，工件浸泡时为3~5分钟，去除工件表面油污及腊渍。
进一步的，所述细小孔洞为直径0.01—0.03μm。
进一步的，所述彩色墨水中含有直径0.0015—0.003μm染料微粒。
对金属表面进行阳极氧化45分钟以上。
氢氧化钠:200g/L，硝酸钠50g/L。
 有益效果
本发明的有益技术效果是：染料为络合金属离子的染料; 经多孔层的氢氧化鋁以物理吸附;再化学络合成显色的金属盐类；成为铝合金的一部份。彩色阳极在阳极膜层进行特殊扩孔技术及特殊生膜阳极参数巩固色粉的附着性及致密性、耐磨性，后处理上色利用特殊打印机加弱溶剂墨水进行上色处理，上色之后再进行封孔处理。封孔之后再用烘烤线烤干。
 附图说明
图 1 是本发明一个实施例的工艺流程图。
本发明的实施方式
下面结合具体实施例，详细说明本发明的具体实施方式，但不对权利要求作任何限定。
在本发明中，采用钛材质的挂具来固定工件上，钛质挂具耐碱耐酸导电性能较好，采用20L硝酸配比100L水的配比硝酸溶液，加温到60~70℃，对工件浸泡时为3~5分钟，去除工件表面油污及腊渍，对铝合金金属表面去油。
铝合金金属表面碱化处理并对碱化物进行中和；进行碱洗溶液配制为：采用氢氧化钠200g、硝酸钠50g溶解在1升的水里面；加温到80~90 ℃，去除产品表面自然氧化层，调节产品表面的光亮度；或氢氧化钠:380g溶解在1升水中，加温到80~90 ℃，去除产品表面自然氧化层，调节产品表面的光亮度；碱洗后对铝合金表面化学物进行中和的溶液配制为：1.硝酸重量百分比:30%，2.铬酸酐重量百分比:5%，3.清水重量百分比:65%；在常温下中和碱洗，去除碱洗后表面的化合物。
铝合金金属表面进行化学抛光并中和化学抛光的化合物；化学抛光的溶液配制为：1.硫酸(含量98%)重量百分比为16%，2.磷酸(含量85%)重量百分比为80%，3.硝酸(含量98%)重量百分比为4%，在温度90~110 ℃中浸泡产品，调节产品表面的光亮度；中和化学抛光的化合物的溶液配制为：1.硝酸重量百分比为30%，2.铬酸酐重量百分比为5%，3.清水重量百分比为65%；在常温下中和化抛的化合物。
对金属表面进行阳极氧化处理，并中和阳极氧化的化学物，在铝合金金属表面进行阳极氧化45分钟以上，在铝合金金属表面形成细小孔洞；阳极氧化所用溶液配制：每升水含有150~200g硫酸及氧化铝10~15g的溶液；溶液温度控制在18~20℃，采用冷冻机、正流器、铅板+铜板+PP槽 固定设备进行阳极氧化处理。在每平方厘米的鋁表面阳极氧化出约77亿个纳米级孔洞，所述细小孔洞为直径0.01—0.03μm。加以打印染色, 而成为唯一可以染色的金属。采用30%重量份硝酸、5%重量份铬酸酐及65%清水配置中和氧化酸液，在常温下进行微孔扩大。
 上述各个程序采用超声波设备进行超声处理，可获得更好的清洗及染料附着效果。
通过打印机采用络合离子纳米弱溶剂彩色墨水对金属表面进行打印彩色工艺图案，彩色墨水中含有直径0.0015—0.003μm染料微粒。彩色墨水进入细小孔洞中；对完成打印彩色图案的铝合金表面风干处理。环境温度控制在26 ℃以下，采用风刀切水30分钟。
在本发明中，染料为络合金属离子的染料; 经多孔层的氢氧化鋁以物理吸附;再化学络合成显色的金属盐类;成为铝合金的一部份；而彩色阳极在阳极膜层进行特殊扩孔技术及特殊生膜阳极参数巩固色粉的附着性及致密性、耐磨性，后处理上色利用特殊打印机加弱溶剂墨水进行上色处理，上色之后再进行封孔处理。封孔之后再用烘烤线烤干。
 

Claims (6)

  1. 金属上色处理工艺，其特征是，包括有如下步骤：
    a.  对铝合金金属表面去油；
    b.  铝合金金属表面碱化处理并对碱化物进行中和；
    c.  铝合金金属表面进行化学抛光并中和化学抛光的化合物；
    d.  对金属表面进行阳极氧化处理，并中和阳极氧化的化学物，在铝合金金属表面形成细小孔洞；
    e.  通过打印机采用络合离子纳米弱溶剂墨水对金属表面进行打印彩色工艺图案，彩色墨水进入细小孔洞中；
    f.  对完成打印彩色图案的铝合金表面风干处理。
  2. 根据权利要求1所述的金属上色处理工艺，其特征是：所述a步骤中，采用耐碱耐酸导电性能较好的钛材质挂架放置铝合金工件。
  3. 根据权利要求1所述的金属上色处理工艺，其特征是：所述a步骤中，采用15%-30%的含硝酸水溶液进行清洗，对硝酸水溶液加温到60~70℃，工件浸泡时为3~5分钟，去除工件表面油污及腊渍。
  4. 根据权利要求1所述的金属上色处理工艺，其特征是：所述细小孔洞为直径0.01—0.03μm。
  5. 根据权利要求1所述的金属上色处理工艺，其特征是：所述彩色墨水中含有直径0.0015—0.003μm染料微粒。
  6. 根据权利要求1所述的金属上色处理工艺，其特征是：对金属表面进行阳极氧化45分钟以上。
     
PCT/CN2021/100668 2021-01-14 2021-06-17 金属上色处理工艺 WO2022151652A1 (zh)

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