WO2018148960A1 - Surface treatment method for aluminum product - Google Patents

Surface treatment method for aluminum product Download PDF

Info

Publication number
WO2018148960A1
WO2018148960A1 PCT/CN2017/074083 CN2017074083W WO2018148960A1 WO 2018148960 A1 WO2018148960 A1 WO 2018148960A1 CN 2017074083 W CN2017074083 W CN 2017074083W WO 2018148960 A1 WO2018148960 A1 WO 2018148960A1
Authority
WO
WIPO (PCT)
Prior art keywords
solution
concentration
sulfuric acid
surface treatment
acid solution
Prior art date
Application number
PCT/CN2017/074083
Other languages
French (fr)
Chinese (zh)
Inventor
张廷玲
Original Assignee
江门市蓬江区善长五金制品有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江门市蓬江区善长五金制品有限公司 filed Critical 江门市蓬江区善长五金制品有限公司
Priority to CN201780085746.9A priority Critical patent/CN110249078A/en
Priority to PCT/CN2017/074083 priority patent/WO2018148960A1/en
Publication of WO2018148960A1 publication Critical patent/WO2018148960A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing

Definitions

  • the invention relates to the field of aluminum product processing, and in particular to a surface treatment method for aluminum products.
  • the surface treatment of aluminum products mainly includes anodizing and chemical oxidation, in which pretreatment is required before oxidation, and the pretreatment is mainly for removing oil stains, dirt and oxide layers on the surface of aluminum products, and sealing treatment is required after oxidation.
  • the sealing treatment is mainly for improving the corrosion resistance of the oxide film.
  • the chromium dioxide solution is generally used for the sealing treatment, but the chromium ion in the chromium salt solution is a carcinogen, which is extremely harmful to the human body and the environment.
  • nickel fluoride is used in the prior art, but nickel fluoride is used.
  • the oxide film formed on the surface of the aluminum product after the sealing treatment has more pores, the sealing effect is poor, and the corrosion prevention effect is poor. . Therefore, in order to avoid the disadvantages existing in the prior art, it is necessary to make improvements to the prior art.
  • An object of the present invention is to overcome the disadvantages and deficiencies of the prior art and to provide a surface treatment method for an aluminum article which can improve corrosion resistance.
  • a method for surface treatment of aluminum products comprising the steps of:
  • Step one degreasing: under normal temperature conditions, soaking in a sulfuric acid solution with a concentration of 140g/L ⁇ 200g/L for 3min ⁇ 5min ;
  • Step 2 Alkali etching: Soaking in a sodium hydroxide solution with a concentration of 40g/L ⁇ 60g/L at a temperature of 40 °C ⁇ 80 °C 5min ⁇ 10min;
  • Step 3 neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min to 5 min;
  • Step 4 anodizing: at a temperature of 15 °C ⁇ 30 °C, at a concentration of 100g/L ⁇ 200g/L Electrolysis in a sulfuric acid solution;
  • Step 5 Sealing: Soaking in a surfactant solution with a pH of 5.5 ⁇ 7 for 30min ⁇ 60min
  • the surfactant includes titanium.
  • the concentration of the sulfuric acid solution in the third step is 80 g/L to 110 g/L, and the concentration of the ammonium persulfate solution is 5g/L ⁇ 15g/L.
  • the solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1.
  • the concentration of the aluminum ions in the fourth step is 5 g/L to 30 g/L.
  • the electrolysis time in the step 4 is 10 min to 20 min.
  • the current density in the step 4 is 0.5 A/dm 2 to 2 A/dm 2
  • the voltage is 10 V to 25 V.
  • the titanium content in the step 5 is 80% to 95%.
  • the titanium content is 80%.
  • the present invention improves the corrosion resistance by increasing the density of the oxide film by using titanium as an active agent in the sealing step.
  • a method for surface treatment of an aluminum article of the present invention comprises the following steps:
  • Step one degreasing: under normal temperature conditions, soaking in a sulfuric acid solution with a concentration of 140g/L ⁇ 200g/L for 3min ⁇ 5min
  • a sulfuric acid solution with a concentration of 140g/L ⁇ 200g/L for 3min ⁇ 5min
  • the aluminum product can be slanted and drained, and the number of operations is twice.
  • Step 2 Alkali etching: Soaking in a sodium hydroxide solution with a concentration of 40g/L ⁇ 60g/L at a temperature of 40 °C ⁇ 80 °C 5min ⁇ 10min; in order to speed up the efficiency, the aluminum product can be slanted and drained, and the operation times are twice.
  • Step 3 neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min to 5 min; the concentration of sulfuric acid solution is 80g / L ⁇ 110g / L, the concentration of ammonium persulfate solution is 5g / L ⁇ 15g / L. The ratio of dissolved mixture of sulfuric acid solution and ammonium persulfate solution is 1 : 1 .
  • the neutralization step uses a mixed solution of a sulfuric acid solution and an ammonium persulfate solution to improve not only the oil removal efficiency, but also the same mixed solution can be used multiple times, reducing the amount of raw materials used and improving work efficiency.
  • Step 4 Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 100 g/L to 200 g/L at a temperature of 15 ° C to 30 ° C; the concentration of aluminum ions is 5 g/L to 30 g/L.
  • the electrolysis time is 10min ⁇ 20min.
  • the current density is 0.5 A/dm 2 ⁇ 2 A/dm 2 and the voltage is 10V ⁇ 25V.
  • the electrolysis time can be adjusted according to the thickness of the oxide film.
  • Step 5 Sealing: Soaking in a surfactant solution with a pH of 5.5 ⁇ 7 for 30min ⁇ 60min
  • Surfactants include titanium. The titanium content is 80% to 95%.
  • a method for surface treatment of an aluminum article of the present invention comprises the following steps:
  • Step one degreasing: soaking in a sulfuric acid solution with a concentration of 140g/L for 4min under normal temperature conditions
  • the aluminum product can be slanted and drained, and the number of operations is twice.
  • Step 2 alkali etching: soaking in a sodium hydroxide solution with a concentration of 60g/L for 5min at 50 °C
  • the aluminum product can be slanted and drained, and the number of operations is twice.
  • Step 3 neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min; concentration of sulfuric acid solution is 80 g/L The concentration of the ammonium persulfate solution was 5 g/L. The solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1. The neutralization time is short and the efficiency is high.
  • Step 4 Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 100 g/L at a temperature of 30 ° C; the concentration of aluminum ions is 5 g/L. The electrolysis time is 10 min. The current density is 0.5 A/dm 2 and the voltage is 10V.
  • Step 5 Sealing: Soak for 30 minutes in a surfactant solution with a pH of 5.5.
  • the surfactant includes titanium. Titanium content is 80%.
  • a method for surface treatment of an aluminum article of the present invention comprises the following steps:
  • Step one degreasing: soaking in a sulfuric acid solution with a concentration of 200g/L for 5min under normal temperature conditions
  • a sulfuric acid solution with a concentration of 200g/L for 5min under normal temperature conditions
  • the aluminum product can be slanted and drained, and the number of operations is twice.
  • Step 2 alkali etching: soaking in a sodium hydroxide solution with a concentration of 60g/L for 5min at 80 °C
  • the aluminum product can be slanted and drained, and the number of operations is twice.
  • Step 3 neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 5 min; concentration of sulfuric acid solution is 110 g/L The concentration of the ammonium persulfate solution was 15 g/L. The solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1.
  • Step 4 Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 200 g/L at a temperature of 15 ° C; the concentration of aluminum ions is 30 g/L. The electrolysis time is 20 min. The current density is 2A/dm 2 and the voltage is 25V.
  • Step 5 Sealing: Soaking in a surfactant solution with a pH of 6 for 60 minutes, the surfactant includes titanium. Titanium content is 95% .
  • the technical solution of the invention can effectively increase the density of the oxide film and improve the corrosion resistance.
  • a method for surface treatment of an aluminum article of the present invention comprises the following steps:
  • Step one degreasing: soaking in a sulfuric acid solution with a concentration of 180g/L for 4min under normal temperature conditions
  • a sulfuric acid solution with a concentration of 180g/L for 4min under normal temperature conditions
  • the aluminum product can be slanted and drained, and the number of operations is twice.
  • the concentration of the sulfuric acid solution and the time of inflation can be adjusted according to the oil on the surface of the aluminum product.
  • Step 2 alkali etching: soaking in a sodium hydroxide solution with a concentration of 50g/L for 6min at 70 °C
  • a sodium hydroxide solution with a concentration of 50g/L for 6min at 70 °C
  • the aluminum product can be slanted and drained, and the number of operations is twice. Soaking time should not be too long.
  • Step 3 neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min; concentration of sulfuric acid solution is 90 g/L The concentration of the ammonium persulfate solution is 10 g/L. The solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1. The neutralization time is short and the efficiency is high.
  • Step 4 Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 150 g/L at a temperature of 30 ° C; the concentration of aluminum ions is 15 g/L. The electrolysis time is 15 min. The current density is 1 A/dm 2 and the voltage is 15V.
  • Step 5 Sealing: Soaking in a surfactant solution with a pH of 6 for 40 minutes, the surfactant includes titanium. Titanium content is 90% . The surface cleaning effect of the aluminum product is good, the density of the oxide film is high, and the corrosion resistance is good.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention discloses a surface treatment method for an aluminum product, comprising the following steps: step 1, degreasing: immersing in a sulfuric acid solution with a concentration of 140-200 g/L for 3-5 minutes at room temperature; step 2, alkali etching: immersing in a sodium hydroxide solution with a concentration of 40-60 g/L for 5 to 10 minutes at a temperature of 40°C to 80°C; step 3, neutralizing: immerse in a mixed solution of a sulfuric acid solution and an ammonium persulfate solution for 3 to 5 minutes; step 4, anodic oxidizing: performing electrolysis in a sulfuric acid solution with a concentration of 100-200 g/L at a temperature of 15°C to 30°C; and step 5, sealing: immersing in a surfactant solution with a pH value of 5.5-7 for 30-60 minutes, the surfactant solution comprising titanium. The invention is provided with better wear resistance and corrosion resistance properties, thereby improving the glossiness and flatness of the surface of the aluminum product.

Description

一种铝制品表面处理方法 Aluminum product surface treatment method 一种铝制品表面处理方法 Aluminum product surface treatment method
技术领域 Technical field
本发明涉及铝制品加工领域，具体涉及 一种铝制品表面处理方法 。 The invention relates to the field of aluminum product processing, and in particular to a surface treatment method for aluminum products.
背景技术 Background technique
铝制品的表面处理主要包括阳极氧化和化学氧化，其中在氧化前需要进行前置处理，前置处理主要是为了去除铝制品表面的油渍、污物及氧化层等，而氧化后需要进行封闭处理，封闭处理主要是为了提高氧化膜的耐腐蚀性能。目前封闭处理一般采用铬盐溶液，但是铬盐溶液中的铬离子是一种致癌物质，对人体和环境造成极大危害，针对以上问题，现有技术中开始采用氟化镍，但是氟化镍封闭处理后的铝制品表面形成的氧化膜具有较多的气孔，封闭效果不佳，防腐蚀效果差 。 因此，为了避免现有技术中存在的缺点，有必要对现有技术做出改进。 The surface treatment of aluminum products mainly includes anodizing and chemical oxidation, in which pretreatment is required before oxidation, and the pretreatment is mainly for removing oil stains, dirt and oxide layers on the surface of aluminum products, and sealing treatment is required after oxidation. The sealing treatment is mainly for improving the corrosion resistance of the oxide film. At present, the chromium dioxide solution is generally used for the sealing treatment, but the chromium ion in the chromium salt solution is a carcinogen, which is extremely harmful to the human body and the environment. In view of the above problems, nickel fluoride is used in the prior art, but nickel fluoride is used. The oxide film formed on the surface of the aluminum product after the sealing treatment has more pores, the sealing effect is poor, and the corrosion prevention effect is poor. . Therefore, in order to avoid the disadvantages existing in the prior art, it is necessary to make improvements to the prior art.
发明内容 Summary of the invention
本发明的目的在于克服现有技术中的缺点与不足，提供一种能提高防腐蚀性能的 铝制品表面处理方法 。 SUMMARY OF THE INVENTION An object of the present invention is to overcome the disadvantages and deficiencies of the prior art and to provide a surface treatment method for an aluminum article which can improve corrosion resistance.
本发明是通过以下的技术方案实现的： The invention is achieved by the following technical solutions:
一种铝制品表面处理方法，包括以下步骤： A method for surface treatment of aluminum products, comprising the steps of:
步骤一，除油：常温条件下，在浓度为 140g/L~200g/L 的硫酸溶液中浸泡 3min~5min ； Step one, degreasing: under normal temperature conditions, soaking in a sulfuric acid solution with a concentration of 140g/L~200g/L for 3min~5min ;
步骤二，碱蚀： 40 ℃ ~80 ℃温度 条件下，在浓度为 40g/L~60g/L 的氢氧化钠溶液中浸泡 5min~10min ； Step 2: Alkali etching: Soaking in a sodium hydroxide solution with a concentration of 40g/L~60g/L at a temperature of 40 °C ~ 80 °C 5min~10min;
步骤三，中和：在硫酸溶液和过硫酸铵溶液的混合溶液中浸泡 3min~5min ； Step 3, neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min to 5 min;
步骤四，阳极氧化： 15 ℃ ~30 ℃温度 条件下，在浓度为 100g/L~200g/L 的硫酸溶液中电解； Step 4, anodizing: at a temperature of 15 °C ~ 30 °C, at a concentration of 100g/L~200g/L Electrolysis in a sulfuric acid solution;
步骤五，封孔：在 PH 值为 5.5~7 的表面活性剂溶液中浸泡 30min~60min ，所述表面活性剂包括钛。 Step 5: Sealing: Soaking in a surfactant solution with a pH of 5.5~7 for 30min~60min The surfactant includes titanium.
进一步， 所述步骤三中的硫酸溶液浓度为 80g/L~110g/L ，所述过硫酸铵溶液的浓度为 5g/L~15g/L 。 Further, the concentration of the sulfuric acid solution in the third step is 80 g/L to 110 g/L, and the concentration of the ammonium persulfate solution is 5g/L~15g/L.
进一步， 所述 硫酸溶液和过硫酸铵溶液的溶积混合比例是 1 ： 1 。 Further, the solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1.
进一步， 所述步骤四中的铝离子的浓度为 5g/L~30g/L 。 Further, the concentration of the aluminum ions in the fourth step is 5 g/L to 30 g/L.
进一步， 所述步骤四中的电解时间为 10min~20min 。 Further, the electrolysis time in the step 4 is 10 min to 20 min.
进一步， 所述步骤四中的电流密度为 0.5 A/dm2~2A/dm2 ，电压为 10V~25V 。Further, the current density in the step 4 is 0.5 A/dm 2 to 2 A/dm 2 , and the voltage is 10 V to 25 V.
进一步，所述步骤五中的钛含量为 80%~95% 。 Further, the titanium content in the step 5 is 80% to 95%.
进一步，所述钛含量为 80% 。 Further, the titanium content is 80%.
相对于现有技术，本发明通过在封孔步骤中采用钛作为活性剂来提高氧化膜的致密度，从而提高了防腐蚀性能。 Compared with the prior art, the present invention improves the corrosion resistance by increasing the density of the oxide film by using titanium as an active agent in the sealing step.
具体实施方式 detailed description
下面将结合本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。 The present invention will be described in detail with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
本发明的 一种铝制品表面处理方法，包括以下步骤： A method for surface treatment of an aluminum article of the present invention comprises the following steps:
步骤一，除油：常温条件下，在浓度为 140g/L~200g/L 的硫酸溶液中浸泡 3min~5min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。 Step one, degreasing: under normal temperature conditions, soaking in a sulfuric acid solution with a concentration of 140g/L~200g/L for 3min~5min In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice.
步骤二，碱蚀： 40 ℃ ~80 ℃温度 条件下，在浓度为 40g/L~60g/L 的氢氧化钠溶液中浸泡 5min~10min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。 Step 2: Alkali etching: Soaking in a sodium hydroxide solution with a concentration of 40g/L~60g/L at a temperature of 40 °C ~ 80 °C 5min~10min; in order to speed up the efficiency, the aluminum product can be slanted and drained, and the operation times are twice.
步骤三，中和：在硫酸溶液和过硫酸铵溶液的混合溶液中浸泡 3min~5min ；硫酸溶液浓度为 80g/L~110g/L ，过硫酸铵溶液的浓度为 5g/L~15g/L 。硫酸溶液和过硫酸铵溶液的溶积混合比例是 1 ： 1 。中和步骤采用硫酸溶液和过硫酸铵溶液的混合溶液不仅能提高除油效率，而且同一混合溶液能使用多次，减少原料的使用量，提高工作效率。 Step 3, neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min to 5 min; the concentration of sulfuric acid solution is 80g / L ~ 110g / L, the concentration of ammonium persulfate solution is 5g / L ~ 15g / L. The ratio of dissolved mixture of sulfuric acid solution and ammonium persulfate solution is 1 : 1 . The neutralization step uses a mixed solution of a sulfuric acid solution and an ammonium persulfate solution to improve not only the oil removal efficiency, but also the same mixed solution can be used multiple times, reducing the amount of raw materials used and improving work efficiency.
步骤四，阳极氧化： 15 ℃ ~30 ℃温度 条件下，在浓度为 100g/L~200g/L 的硫酸溶液中电解；铝离子的浓度为 5g/L~30g/L 。电解时间为 10min~20min 。电流密度为 0.5 A/dm2~2A/dm2 ，电压为 10V~25V 。电解时间可以根据氧化膜的厚度来调整。Step 4: Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 100 g/L to 200 g/L at a temperature of 15 ° C to 30 ° C; the concentration of aluminum ions is 5 g/L to 30 g/L. The electrolysis time is 10min~20min. The current density is 0.5 A/dm 2 ~2 A/dm 2 and the voltage is 10V~25V. The electrolysis time can be adjusted according to the thickness of the oxide film.
步骤五，封孔：在 PH 值为 5.5~7 的表面活性剂溶液中浸泡 30min~60min ，表面活性剂包括钛。钛含量为 80%~95% 。 Step 5: Sealing: Soaking in a surfactant solution with a pH of 5.5~7 for 30min~60min Surfactants include titanium. The titanium content is 80% to 95%.
实施例 1 Example 1
本发明的 一种铝制品表面处理方法，包括以下步骤： A method for surface treatment of an aluminum article of the present invention comprises the following steps:
步骤一，除油：常温条件下，在浓度为 140g/L 的硫酸溶液中浸泡 4min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。 Step one, degreasing: soaking in a sulfuric acid solution with a concentration of 140g/L for 4min under normal temperature conditions In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice.
步骤二，碱蚀： 50 ℃温度 条件下，在浓度为 60g/L 的氢氧化钠溶液中浸泡 5min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。 Step 2, alkali etching: soaking in a sodium hydroxide solution with a concentration of 60g/L for 5min at 50 °C In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice.
步骤三，中和：在硫酸溶液和过硫酸铵溶液的混合溶液中浸泡 3min ；硫酸溶液浓度为 80g/L ，过硫酸铵溶液的浓度为 5g/L 。硫酸溶液和过硫酸铵溶液的溶积混合比例是 1 ： 1 。中和时间短，效率高。 Step 3, neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min; concentration of sulfuric acid solution is 80 g/L The concentration of the ammonium persulfate solution was 5 g/L. The solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1. The neutralization time is short and the efficiency is high.
步骤四，阳极氧化： 30 ℃温度 条件下，在浓度为 100g/L 的硫酸溶液中电解；铝离子的浓度为 5g/L 。电解时间为 10min 。电流密度为 0.5 A/dm2 ，电压为 10V 。Step 4: Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 100 g/L at a temperature of 30 ° C; the concentration of aluminum ions is 5 g/L. The electrolysis time is 10 min. The current density is 0.5 A/dm 2 and the voltage is 10V.
步骤五，封孔：在 PH 值为 5.5 的表面活性剂溶液中浸泡 30min ，表面活性剂包括钛。钛含量为 80% 。 Step 5: Sealing: Soak for 30 minutes in a surfactant solution with a pH of 5.5. The surfactant includes titanium. Titanium content is 80%.
实施例 2 Example 2
本发明的 一种铝制品表面处理方法，包括以下步骤： A method for surface treatment of an aluminum article of the present invention comprises the following steps:
步骤一，除油：常温条件下，在浓度为 200g/L 的硫酸溶液中浸泡 5min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。 Step one, degreasing: soaking in a sulfuric acid solution with a concentration of 200g/L for 5min under normal temperature conditions In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice.
步骤二，碱蚀： 80 ℃温度 条件下，在浓度为 60g/L 的氢氧化钠溶液中浸泡 5min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。 Step 2, alkali etching: soaking in a sodium hydroxide solution with a concentration of 60g/L for 5min at 80 °C In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice.
步骤三，中和：在硫酸溶液和过硫酸铵溶液的混合溶液中浸泡 5min ；硫酸溶液浓度为 110g/L ，过硫酸铵溶液的浓度为 15g/L 。硫酸溶液和过硫酸铵溶液的溶积混合比例是 1 ： 1 。 Step 3, neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 5 min; concentration of sulfuric acid solution is 110 g/L The concentration of the ammonium persulfate solution was 15 g/L. The solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1.
步骤四，阳极氧化： 15 ℃温度 条件下，在浓度为 200g/L 的硫酸溶液中电解；铝离子的浓度为 30g/L 。电解时间为 20min 。电流密度为 2A/dm2 ，电压为 25V 。Step 4: Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 200 g/L at a temperature of 15 ° C; the concentration of aluminum ions is 30 g/L. The electrolysis time is 20 min. The current density is 2A/dm 2 and the voltage is 25V.
步骤五，封孔：在 PH 值为 6 的表面活性剂溶液中浸泡 60min ，表面活性剂包括钛。钛含量为 95% 。使用本发明技术方案能有效提高氧化膜的致密度，提高防腐蚀性能。 Step 5: Sealing: Soaking in a surfactant solution with a pH of 6 for 60 minutes, the surfactant includes titanium. Titanium content is 95% . The technical solution of the invention can effectively increase the density of the oxide film and improve the corrosion resistance.
实施例 3 Example 3
本发明的 一种铝制品表面处理方法，包括以下步骤： A method for surface treatment of an aluminum article of the present invention comprises the following steps:
步骤一，除油：常温条件下，在浓度为 180g/L 的硫酸溶液中浸泡 4min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。可根据铝制品表面的 油渍物调整 硫酸溶液的浓度和侵泡时间。 Step one, degreasing: soaking in a sulfuric acid solution with a concentration of 180g/L for 4min under normal temperature conditions In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice. The concentration of the sulfuric acid solution and the time of inflation can be adjusted according to the oil on the surface of the aluminum product.
步骤二，碱蚀： 70 ℃温度 条件下，在浓度为 50g/L 的氢氧化钠溶液中浸泡 6min ；为了加快效率，可以对铝制品提挂倾斜泄水，操作次数为两次。浸泡时间也不宜过长。 Step 2, alkali etching: soaking in a sodium hydroxide solution with a concentration of 50g/L for 6min at 70 °C In order to speed up the efficiency, the aluminum product can be slanted and drained, and the number of operations is twice. Soaking time should not be too long.
步骤三，中和：在硫酸溶液和过硫酸铵溶液的混合溶液中浸泡 3min ；硫酸溶液浓度为 90g/L ，过硫酸铵溶液的浓度为 10g/L 。硫酸溶液和过硫酸铵溶液的溶积混合比例是 1 ： 1 。中和时间短，效率高。 Step 3, neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min; concentration of sulfuric acid solution is 90 g/L The concentration of the ammonium persulfate solution is 10 g/L. The solution mixing ratio of the sulfuric acid solution and the ammonium persulfate solution is 1:1. The neutralization time is short and the efficiency is high.
步骤四，阳极氧化： 30 ℃温度 条件下，在浓度为 150g/L 的硫酸溶液中电解；铝离子的浓度为 15g/L 。电解时间为 15min 。电流密度为 1 A/dm2 ，电压为 15V 。Step 4: Anodizing: Electrolysis in a sulfuric acid solution having a concentration of 150 g/L at a temperature of 30 ° C; the concentration of aluminum ions is 15 g/L. The electrolysis time is 15 min. The current density is 1 A/dm 2 and the voltage is 15V.
步骤五，封孔：在 PH 值为 6 的表面活性剂溶液中浸泡 40min ，表面活性剂包括钛。钛含量为 90% 。铝制品表面清洗效果好，氧化膜的致密度高，防腐蚀性能好。 Step 5: Sealing: Soaking in a surfactant solution with a pH of 6 for 40 minutes, the surfactant includes titanium. Titanium content is 90% . The surface cleaning effect of the aluminum product is good, the density of the oxide film is high, and the corrosion resistance is good.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims (8)

  1. 一种铝制品表面处理方法，其特征在于：包括以下步骤： A method for surface treatment of aluminum products, comprising: the following steps:
    步骤一，除油：常温条件下，在浓度为140g/L~200g/L的硫酸溶液中浸泡3min~5min；Step one, degreasing: under normal temperature conditions, soaking in a concentration of 140g / L ~ 200g / L sulfuric acid solution for 3min ~ 5min;
    步骤二，碱蚀：40℃~80℃温度条件下，在浓度为40g/L~60g/L的氢氧化钠溶液中浸泡5min~10min；Step 2, alkali etching: 40 ° C ~ 80 ° C temperature conditions, immersed in a concentration of 40g / L ~ 60g / L sodium hydroxide solution for 5min ~ 10min;
    步骤三，中和：在硫酸溶液和过硫酸铵溶液的混合溶液中浸泡3min~5min；Step 3, neutralization: soaking in a mixed solution of sulfuric acid solution and ammonium persulfate solution for 3 min to 5 min;
    步骤四，阳极氧化：15℃~30℃温度条件下，在浓度为100g/L~200g/L的硫酸溶液中电解；Step 4, anodizing: electrolysis in a sulfuric acid solution having a concentration of 100 g/L to 200 g/L at a temperature of 15 ° C to 30 ° C;
    步骤五，封孔：在PH值为5.5~7的表面活性剂溶液中浸泡30min~60min，所述表面活性剂包括钛。 Step 5: Sealing: Soaking in a surfactant solution having a pH of 5.5 to 7 for 30 minutes to 60 minutes, and the surfactant includes titanium.
  2. 根据权利要求1所述的铝制品表面处理方法，其特征在于：所述步骤三中的硫酸溶液浓度为80g/L~110g/L，所述过硫酸铵溶液的浓度为5g/L~15g/L。The surface treatment method for an aluminum product according to claim 1, wherein the concentration of the sulfuric acid solution in the third step is from 80 g/L to 110 g/L, and the concentration of the ammonium persulfate solution is from 5 g/L to 15 g/ L.
  3. 根据权利要求2所述的铝制品表面处理方法，其特征在于：所述硫酸溶液和过硫酸铵溶液的溶积混合比例是1：1。The surface treatment method for an aluminum article according to claim 2, wherein a ratio of a mixture of the sulfuric acid solution and the ammonium persulfate solution is 1:1.
  4. 根据权利要求1所述的铝制品表面处理方法，其特征在于：所述步骤四中的铝离子的浓度为5g/L~30g/L。The surface treatment method for an aluminum article according to claim 1, wherein the concentration of the aluminum ions in the step 4 is 5 g/L to 30 g/L.
  5. 根据权利要求1所述的铝制品表面处理方法，其特征在于：所述步骤四中的电解时间为10min~20min。The surface treatment method for an aluminum article according to claim 1, wherein the electrolysis time in the step 4 is 10 min to 20 min.
  6. 根据权利要求1所述的铝制品表面处理方法，其特征在于：所述步骤四中的电流密度为0.5 A/dm2~2A/dm2，电压为10V~25V。The surface treatment method for an aluminum article according to claim 1, wherein the current density in the step 4 is 0.5 A/dm2~2A/dm2, the voltage is 10V~25V.
  7. 根据权利要求1所述的铝制品表面处理方法，其特征在于：所述步骤五中的钛含量为80%~95%。The surface treatment method for an aluminum article according to claim 1, wherein the titanium content in the step 5 is 80% to 95%.
  8. 根据权利要求7所述的铝制品表面处理方法，其特征在于：所述钛含量为80%。The surface treatment method for an aluminum article according to claim 7, wherein the titanium content is 80%.
PCT/CN2017/074083 2017-02-20 2017-02-20 Surface treatment method for aluminum product WO2018148960A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780085746.9A CN110249078A (en) 2017-02-20 2017-02-20 A kind of surface treating method for aluminum product
PCT/CN2017/074083 WO2018148960A1 (en) 2017-02-20 2017-02-20 Surface treatment method for aluminum product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/074083 WO2018148960A1 (en) 2017-02-20 2017-02-20 Surface treatment method for aluminum product

Publications (1)

Publication Number Publication Date
WO2018148960A1 true WO2018148960A1 (en) 2018-08-23

Family

ID=63169721

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/074083 WO2018148960A1 (en) 2017-02-20 2017-02-20 Surface treatment method for aluminum product

Country Status (2)

Country Link
CN (1) CN110249078A (en)
WO (1) WO2018148960A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110079848A (en) * 2019-04-28 2019-08-02 安徽华淮新材料有限公司 Aluminum alloy chemically coarse sand surface treatment method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103590086A (en) * 2013-11-14 2014-02-19 佛山市三水雄鹰铝表面技术创新中心有限公司 Nickel-free hole sealing agent for aluminum alloy and hole sealing treatment process of agent
CN104005072A (en) * 2014-05-30 2014-08-27 中南大学 Method for sealing aluminum-alloy surface anode oxide film hole by adopting titanium dioxide gel
CN104674319A (en) * 2014-11-25 2015-06-03 江门市蓬江区善长五金制品有限公司 Surface treating method for aluminum product
CN105603486A (en) * 2015-09-30 2016-05-25 浙江帝龙新材料股份有限公司 Aluminum strip continuous anodic oxidation process

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3018824B1 (en) * 2014-03-24 2017-07-28 Constellium Extrusion Decin S R O PROCESS FOR MANUFACTURING A DECOLLETE AND ANODIZED 6XXX ALLOY MECHANICAL PIECE HAVING LOW ROUGHNESS AFTER ANODIZATION
CN105239130A (en) * 2015-09-24 2016-01-13 马鞍山杰创塑胶科技有限公司 High-antiseptic aluminum alloy anode oxide film non-nickel sealant and preparation method thereof
CN105200485A (en) * 2015-09-24 2015-12-30 马鞍山杰创塑胶科技有限公司 Aluminum alloy anode oxide film nickel-free sealant high in thermal stability and preparation method thereof
CN105200482A (en) * 2015-09-24 2015-12-30 马鞍山杰创塑胶科技有限公司 Nickel-free hole sealing agent for improving abrasion resistance of aluminum alloy anode oxide film and preparation method of nickel-free hole sealing agent
CN105200483A (en) * 2015-09-24 2015-12-30 马鞍山杰创塑胶科技有限公司 Mid-temperature treatment aluminum alloy anode oxide film nickel-free hole sealing agent and preparation method thereof
CN105543932A (en) * 2016-02-03 2016-05-04 温州安能科技有限公司 Continuous surface treatment technology for aluminum alloy strip
CN105951150A (en) * 2016-05-18 2016-09-21 安徽省安庆市金誉金属材料有限公司 Surface treatment process for aluminum plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103590086A (en) * 2013-11-14 2014-02-19 佛山市三水雄鹰铝表面技术创新中心有限公司 Nickel-free hole sealing agent for aluminum alloy and hole sealing treatment process of agent
CN104005072A (en) * 2014-05-30 2014-08-27 中南大学 Method for sealing aluminum-alloy surface anode oxide film hole by adopting titanium dioxide gel
CN104674319A (en) * 2014-11-25 2015-06-03 江门市蓬江区善长五金制品有限公司 Surface treating method for aluminum product
CN105603486A (en) * 2015-09-30 2016-05-25 浙江帝龙新材料股份有限公司 Aluminum strip continuous anodic oxidation process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110079848A (en) * 2019-04-28 2019-08-02 安徽华淮新材料有限公司 Aluminum alloy chemically coarse sand surface treatment method
CN110079848B (en) * 2019-04-28 2021-02-23 安徽华淮新材料有限公司 Aluminum alloy chemical coarse sand surface treatment method

Also Published As

Publication number Publication date
CN110249078A (en) 2019-09-17

Similar Documents

Publication Publication Date Title
CN103590043B (en) The pretreated method of aluminum alloy surface
CN104911670B (en) The hole sealing agent of oxidation aluminium film and the middle temperature method for sealing of low nickel
WO2018148960A1 (en) Surface treatment method for aluminum product
US1946151A (en) Protecting aluminum from corrosion
CN106191959A (en) A kind of environment-friendly type aluminium alloy sealing agent
CN112442720A (en) Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process
CN107299347A (en) Surface treatment process of aluminum alloy section for doors and windows
KR890001709B1 (en) Surface treatment of aluminum or aluminum alloys
CN105154898A (en) Beryllium bronze oxide film organic cleaning agent
WO2021101076A1 (en) Ionic liquid for pickling stainless steel and method for pickling stainless steel by using same
US2648626A (en) Method of electrolytic coating
CN205774844U (en) A kind of aluminium section bar electrolytic coloring device
CN104195614A (en) Passivator and aluminum alloy pre-treatment technology
CN103122473A (en) Electrochemical colouring liquid for stainless steel and electrochemical blacking method for stainless steel
DE1496906B2 (en) Aqueous bath for the electrolysis of iron and steel
US2456281A (en) Removing incrustations from lead anodes used for chromium plating
JPS6253598B2 (en)
KR100213470B1 (en) The coating composition and process for the chemical polishing of aluminium and its alloy
CN102677140A (en) Process for cleaning surfaces of stainless steel castings
CA1154713A (en) Electrical connector of tantalum or niobium for cathodic protection system
JPH0713320B2 (en) Electrolytic pickling method for strips of special steel
KR101791539B1 (en) TECH ARC COATING METHOD FOR Al ALLOYS GOODS
CN106757078A (en) A kind of high-efficient rust-removing agent
JPH11106993A (en) Method for electrolytically neutralizing anodic oxide film of aluminum or alloy
JPH0598583A (en) One-dip alkali dyeing for wool

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17896412

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC

122 Ep: pct application non-entry in european phase

Ref document number: 17896412

Country of ref document: EP

Kind code of ref document: A1