CN104005071B - Sealing treatment method in aluminum alloy surface treatment and sealing liquid adopted by sealing treatment method - Google Patents
Sealing treatment method in aluminum alloy surface treatment and sealing liquid adopted by sealing treatment method Download PDFInfo
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- CN104005071B CN104005071B CN201410220061.9A CN201410220061A CN104005071B CN 104005071 B CN104005071 B CN 104005071B CN 201410220061 A CN201410220061 A CN 201410220061A CN 104005071 B CN104005071 B CN 104005071B
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- 238000007789 sealing Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 41
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 238000004381 surface treatment Methods 0.000 title claims abstract description 7
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 15
- GJKFIJKSBFYMQK-UHFFFAOYSA-N lanthanum(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GJKFIJKSBFYMQK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims description 19
- 238000007254 oxidation reaction Methods 0.000 claims description 19
- KKVSNHQGJGJMHA-UHFFFAOYSA-H cerium(3+);trisulfate;hydrate Chemical compound O.[Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KKVSNHQGJGJMHA-UHFFFAOYSA-H 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- MEXSQFDSPVYJOM-UHFFFAOYSA-J cerium(4+);disulfate;tetrahydrate Chemical compound O.O.O.O.[Ce+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O MEXSQFDSPVYJOM-UHFFFAOYSA-J 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 25
- 239000000956 alloy Substances 0.000 description 25
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 11
- 229910052761 rare earth metal Inorganic materials 0.000 description 11
- 239000007921 spray Substances 0.000 description 7
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 6
- -1 rare earth carbonate Chemical class 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 description 5
- 229910000333 cerium(III) sulfate Inorganic materials 0.000 description 5
- 150000002910 rare earth metals Chemical class 0.000 description 5
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical group [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000012286 potassium permanganate Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- MEIDRGPPJVWRKW-UHFFFAOYSA-N [F].[Ni] Chemical compound [F].[Ni] MEIDRGPPJVWRKW-UHFFFAOYSA-N 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical group [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- CFYGEIAZMVFFDE-UHFFFAOYSA-N neodymium(3+);trinitrate Chemical compound [Nd+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O CFYGEIAZMVFFDE-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 description 1
- 229910001488 sodium perchlorate Inorganic materials 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- BXJPTTGFESFXJU-UHFFFAOYSA-N yttrium(3+);trinitrate Chemical compound [Y+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O BXJPTTGFESFXJU-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a sealing treatment method in aluminum alloy surface treatment and sealing liquid adopted by the sealing treatment method. The confining liquid consists of the following components in concentration: 5-25 g/L of cerium sulfate tetrahydrate, 1-5 g/L of lanthanum nitrate hexahydrate and 0.5-2.5 g/L of ammonium persulfate. The soaking time is 50-70 min, and the temperature of the sealing liquid is 40-60 ℃. The sealing liquid is environment-friendly and human-friendly, and can greatly improve the corrosion resistance of the oxide film after sealing treatment.
Description
Technical field
The invention belongs to technical field of aluminum alloy surface treatment, be specifically related to the confining liquid of a kind of sealing treatment method during aluminum alloy surface processes and employing thereof.
Background technology
The surface treatment of aluminium alloy mainly includes anodic oxidation and chemical oxidation, wherein needs to carry out pre-treatment before the oxidation, then needs to carry out sealing treatment after oxidation, and sealing treatment is mainly for improving the decay resistance of oxide-film.
Difference according to confining liquid, conventional sealing treatment method specifically includes that method closed by nickel fluorine system method, potassium dichromate method, rare chromic acid and rare earth closes method.
Wherein nickel fluorine system method, potassium dichromate method and rare chromic acid close method be advantageous in that sealing treatment after oxide-film there is good decay resistance, shortcoming is then that environment and human influence is relatively big, such as Ni2+And F-Human body and environment are caused high risks by capital, and Cr6+It is listed in one of chemical substance that harm is maximum especially, is internationally recognized carcinogen.
Rare earth is closed the advantage of method and is then in that environmental protection, environment and human body is friendly, the oxide-film decay resistance that shortcoming is then after sealing treatment is not good, and rare earth is closed the confining liquid of method employing and is mainly rare earth carbonate (Chinese patent literature CN1746341A, CN103173833A etc.) or rare earth nitrate (Chinese patent literature CN102560489A, CN103305892A, CN103614757A etc.).
Chinese patent literature CN102650068A discloses a kind of aluminum and aluminum alloy anodic oxide film sealant and preparation method thereof, and the sealer that the method adopts is made up of rare earth nitrate, oxidant, stabilizer and deionized water;Wherein rare earth nitrate is selected from cerous nitrate, Yttrium trinitrate or neodymium nitrate;Oxidant is selected from potassium permanganate, hydrogen peroxide, sodium perchlorate or potassium chlorate;Stabilizer is selected from potassium pyrophosphate or sodium pyrophosphate.The deficiency of the document is in that: the oxide-film decay resistance after being processed by this sealer is still undesirable.
Summary of the invention
An object of the present invention is in that to solve the problems referred to above, it is proposed to one is both friendly to environment and human body, ensure that again the oxide-film after closing has the sealing treatment method in the aluminum alloy surface process of the decay resistance of excellence.
Another object of the present invention is to the confining liquid providing above-mentioned sealing treatment method to adopt.
The technical scheme realizing one of the object of the invention is: the sealing treatment method in the process of a kind of aluminum alloy surface, is placed in by the aluminium alloy after surface treated in confining liquid and soaks, and washes, dries after taking-up;Described confining liquid is made up of the component of following concentration: four cerium sulfate hydrate 5~25g/L, lanthanum nitrate hexahydrate 1~5g/L, Ammonium persulfate. 0.5~2.5g/L.
Described confining liquid is preferably made up of the component of following concentration: four cerium sulfate hydrate 15g/L, lanthanum nitrate hexahydrate 3g/L, Ammonium persulfate. 1.5g/L.
The time of described immersion is 50~70min, and confining liquid temperature is 40~60 DEG C.
Described surface treatment is anodic oxidation or chemical oxidation.
The technical scheme realizing another object of the present invention is: the confining liquid that the sealing treatment method in the process of a kind of aluminum alloy surface adopts, and is made up of the component of following concentration: four cerium sulfate hydrate 5~25g/L, lanthanum nitrate hexahydrate 1~5g/L, Ammonium persulfate. 0.5~2.5g/L.
Preferably it is made up of the component of following concentration: four cerium sulfate hydrate 15g/L, lanthanum nitrate hexahydrate 3g/L, Ammonium persulfate. 1.5g/L.
The present invention has positive effect: (1) one aspect of the present invention adopts cerous sulfate to substitute cerous nitrate and Lanthanum (III) nitrate composition rare-earth salts, Ammonium persulfate. is adopted to substitute the rare earth confining liquid of the oxidants such as potassium permanganate and rare-earth salts composition on the other hand, this rare earth confining liquid is not only friendly to environment and human body, and can be greatly improved the decay resistance of the oxide-film after sealing treatment.(2) the oxide-film surface after the confining liquid of the present invention processes uniformly, without iris, compact structure, atresia.
Accompanying drawing explanation
Fig. 1 is the metallurgical microscope photo of 7075 aluminum alloy surface after embodiment 1 sealing treatment.
Fig. 2 is the metallurgical microscope photo of 6063 aluminum alloy surface after embodiment 6 sealing treatment.
Fig. 3 is the metallurgical microscope photo of 1060 aluminum alloy surface after embodiment 11 sealing treatment.
Detailed description of the invention
(embodiment 1)
The present embodiment is that 7075 aluminium alloys after anodic oxidation are carried out sealing treatment, and concrete grammar is as follows:
First 7075 aluminium alloys containing anode oxide film through anodic oxidation rear surface are mounted.
Then immersion 60min in the confining liquid of 50 DEG C is hung on;Consisting of of confining liquid: four cerium sulfate hydrate 5g/L, lanthanum nitrate hexahydrate 1g/L and Ammonium persulfate. 0.5g/L.
Finally 7075 aluminium alloys are taken out, wash, dry.
Fig. 1 is shown in by the metallurgical microscope photo of 7075 aluminum alloy surface after the present embodiment sealing treatment.
As seen from Figure 1: 7075 aluminum alloy surface after the present embodiment sealing treatment uniformly, without iris, compact structure, atresia.
7075 positive pole oxidation film on aluminum alloy surfaces after the present embodiment sealing treatment are carried out salt spray corrosion test and dropping corrosion test, and result is in Table 1.
Wherein salt spray corrosion test is neutral salt spray test, and condition is as follows: laboratory temperature 35 ± 1 DEG C, saturated air barrel temperature 47 ± 1 DEG C, 1 ± 0.01 normal atmosphere of air pressure, spray amount 1.0~2.0mL/80cm2/ h, sodium chloride concentration is 5wt%.
The potassium dichromate that volumetric solution is 0.6g that dropping corrosion test adopts is dissolved in the concentrated hydrochloric acid that 25mL concentration is 4mol/L.
(embodiment 2~embodiment 5)
Each embodiment is substantially the same manner as Example 1, and difference is in Table 1.
Table 1
Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
Aluminium alloy | 7075 aluminium alloys | 7075 aluminium alloys | 7075 aluminium alloys | 7075 aluminium alloys | 7075 aluminium alloys |
Cerous sulfate | 15g/L | 5g/L | 25g/L | 15g/L | 15g/L |
Lanthanum (III) nitrate | 3g/L | 1g/L | 5g/L | 3g/L | 3g/L |
Ammonium persulfate. | 1.5g/L | 0.5g/L | 2.5g/L | 1.5g/L | 1.5g/L |
Confining liquid temperature | 50℃ | 50℃ | 50℃ | 40℃ | 60℃ |
Soak time | 60min | 60min | 60min | 70min | 50min |
Salt-fog resistant time | 153h | 149h | 151h | 152h | 153h |
The resistance to drop time | 12.56s | 12.49s | 12.52s | 12.51s | 12.53s |
(embodiment 6)
The present embodiment is that 6063 aluminium alloys after anodic oxidation are carried out sealing treatment, and concrete grammar is with embodiment 1.
Fig. 2 is shown in by the metallurgical microscope photo of 6063 aluminum alloy surface after the present embodiment sealing treatment.
As seen from Figure 2: 6063 aluminum alloy surface after the present embodiment sealing treatment uniformly, without iris, compact structure, atresia.
6063 positive pole oxidation film on aluminum alloy surfaces after the present embodiment sealing treatment are carried out salt spray corrosion test and dropping corrosion test, and result is in Table 2.
(embodiment 7~embodiment 10)
Each embodiment is substantially the same manner as Example 6, and difference is in Table 2.
Table 2
Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Embodiment 10 | |
Aluminium alloy | 6063 aluminium alloys | 6063 aluminium alloys | 6063 aluminium alloys | 6063 aluminium alloys | 6063 aluminium alloys |
Cerous sulfate | 15g/L | 5g/L | 25g/L | 15g/L | 15g/L |
Lanthanum (III) nitrate | 3g/L | 1g/L | 5g/L | 3g/L | 3g/L |
Ammonium persulfate. | 1.5g/L | 0.5g/L | 2.5g/L | 1.5g/L | 1.5g/L |
Confining liquid temperature | 50℃ | 50℃ | 50℃ | 40℃ | 60℃ |
Soak time | 60min | 60min | 60min | 70min | 50min |
Salt-fog resistant time | 150h | 147h | 149h | 149h | 150h |
The resistance to drop time | 12.23s | 12.15s | 12.19s | 12.20s | 12.21s |
(embodiment 11)
The present embodiment is that 1060 aluminium alloys after anodic oxidation are carried out sealing treatment, and concrete grammar is with embodiment 1.
Fig. 3 is shown in by the metallurgical microscope photo of 1060 aluminum alloy surface after the present embodiment sealing treatment.
As seen from Figure 3: 1060 aluminum alloy surface after the present embodiment sealing treatment uniformly, without iris, compact structure, atresia.
1060 positive pole oxidation film on aluminum alloy surfaces after the present embodiment sealing treatment are carried out salt spray corrosion test and dropping corrosion test, and result is in Table 3.
(embodiment 12~embodiment 15)
Each embodiment is substantially the same manner as Example 11, and difference is in Table 3.
Table 3
Embodiment 11 | Embodiment 12 | Embodiment 13 | Embodiment 14 | Embodiment 15 | |
Aluminium alloy | 1060 aluminium alloys | 1060 aluminium alloys | 1060 aluminium alloys | 1060 aluminium alloys | 1060 aluminium alloys |
Cerous sulfate | 15g/L | 5g/L | 25g/L | 15g/L | 15g/L |
Lanthanum (III) nitrate | 3g/L | 1g/L | 5g/L | 3g/L | 3g/L |
Ammonium persulfate. | 1.5g/L | 0.5g/L | 2.5g/L | 1.5g/L | 1.5g/L |
Confining liquid temperature | 50℃ | 50℃ | 50℃ | 40℃ | 60℃ |
Soak time | 60min | 60min | 60min | 70min | 50min |
Salt-fog resistant time | 151h | 148h | 149h | 150h | 151h |
The resistance to drop time | 12.35s | 12.27s | 12.29s | 12.30s | 12.32s |
(comparative example 1~comparative example 5)
Each comparative example is substantially the same manner as Example 6, is different in that the composition of confining liquid, is specifically shown in table 4.
6063 positive pole oxidation film on aluminum alloy surfaces after each comparative example sealing treatment are carried out salt spray corrosion test and dropping corrosion test, and result is still in Table 4.
Table 4
Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
Aluminium alloy | 6063 aluminium alloys | 6063 aluminium alloys | 6063 aluminium alloys | 6063 aluminium alloys | 6063 aluminium alloys |
Cerous nitrate | - | 15g/L | - | 15g/L | 17g/L |
Cerous sulfate | 15g/L | - | 15g/L | - | - |
Lanthanum (III) nitrate | - | 3g/L | 3g/L | 3g/L | - |
Ammonium persulfate. | 1.5g/L | 1.5g/L | - | - | - |
Potassium permanganate | - | - | 1.5g/L | 1.5g/L | 0.6g/L |
Potassium pyrophosphate | - | - | - | - | 0.27g/L |
Salt-fog resistant time | 137h | 140h | 132h | 120h | 116h |
The resistance to drop time | 11.12s | 11.21s | 11.08s | 10.85s | 10.59s |
Wherein comparative example 5 is the confining liquid of Chinese patent literature CN102650068A embodiment 1.
As can be seen from Table 4: the decay resistance of 6063 positive pole oxidation film on aluminum alloy surfaces after each comparative example sealing treatment is all undesirable, especially comparative example 4 and comparative example 5.
Claims (7)
1. the sealing treatment method in aluminum alloy surface process, is placed in the aluminium alloy after surface treated in confining liquid and soaks, and washes, dries after taking-up;It is characterized in that: described confining liquid is made up of the component of following concentration: four cerium sulfate hydrate 5~25g/L, lanthanum nitrate hexahydrate 1~5g/L, Ammonium persulfate. 0.5~2.5g/L.
2. the sealing treatment method in aluminum alloy surface according to claim 1 process, it is characterised in that: described confining liquid is made up of the component of following concentration: four cerium sulfate hydrate 15g/L, lanthanum nitrate hexahydrate 3g/L, Ammonium persulfate. 1.5g/L.
3. the sealing treatment method in aluminum alloy surface according to claim 1 and 2 process, it is characterised in that: the time of described immersion is 50~70min, and confining liquid temperature is 40~60 DEG C.
4. the sealing treatment method in aluminum alloy surface according to claim 3 process, it is characterised in that: described surface treatment is anodic oxidation or chemical oxidation.
5. the sealing treatment method in aluminum alloy surface according to claim 1 and 2 process, it is characterised in that: described surface treatment is anodic oxidation or chemical oxidation.
6. the confining liquid that the sealing treatment method in an aluminum alloy surface process adopts, it is characterised in that be made up of the component of following concentration: four cerium sulfate hydrate 5~25g/L, lanthanum nitrate hexahydrate 1~5g/L, Ammonium persulfate. 0.5~2.5g/L.
7. the confining liquid that the sealing treatment method in aluminum alloy surface according to claim 6 process adopts, it is characterised in that be made up of the component of following concentration: four cerium sulfate hydrate 15g/L, lanthanum nitrate hexahydrate 3g/L, Ammonium persulfate. 1.5g/L.
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CN109778284A (en) * | 2019-01-18 | 2019-05-21 | 广州欧邦联合建材有限公司 | A kind of aluminium ring is protected without nickel sealer, preparation method and its enclosure method |
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