CN109468630A - A kind of golden passivating solution of electrogalvanizing alkalinity - Google Patents
A kind of golden passivating solution of electrogalvanizing alkalinity Download PDFInfo
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- CN109468630A CN109468630A CN201811275747.2A CN201811275747A CN109468630A CN 109468630 A CN109468630 A CN 109468630A CN 201811275747 A CN201811275747 A CN 201811275747A CN 109468630 A CN109468630 A CN 109468630A
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- passivating solution
- electrogalvanizing
- passivating
- solution
- golden
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 20
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims abstract description 20
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 17
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 10
- 235000019441 ethanol Nutrition 0.000 claims abstract description 10
- 235000013024 sodium fluoride Nutrition 0.000 claims abstract description 10
- 239000011775 sodium fluoride Substances 0.000 claims abstract description 10
- 235000015393 sodium molybdate Nutrition 0.000 claims abstract description 10
- 239000011684 sodium molybdate Substances 0.000 claims abstract description 10
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004615 ingredient Substances 0.000 claims abstract description 6
- 238000002161 passivation Methods 0.000 abstract description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000011701 zinc Substances 0.000 abstract description 12
- 229910052725 zinc Inorganic materials 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 5
- 239000011651 chromium Substances 0.000 abstract description 5
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 235000018660 ammonium molybdate Nutrition 0.000 abstract description 2
- 239000011609 ammonium molybdate Substances 0.000 abstract description 2
- 229940010552 ammonium molybdate Drugs 0.000 abstract description 2
- 230000000295 complement effect Effects 0.000 abstract description 2
- 231100000614 poison Toxicity 0.000 abstract description 2
- 230000007096 poisonous effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 57
- 235000011114 ammonium hydroxide Nutrition 0.000 description 16
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 15
- 239000008367 deionised water Substances 0.000 description 13
- 229910021641 deionized water Inorganic materials 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- -1 rare earth metal salt Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- 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
- C23C22/05—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 using aqueous solutions
- C23C22/60—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 using aqueous solutions using alkaline aqueous solutions with pH greater than 8
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
Landscapes
- 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)
- Chemical Treatment Of Metals (AREA)
Abstract
The present invention discloses a kind of golden passivating solution of electrogalvanizing alkalinity, and the pH value of passivating solution is 8.5-9.5, ingredient and content are as follows: sodium molybdate 20-30g/L, ammonium hydroxide 15-20mL/L, ammonium chloride 5-8g/L, sodium fluoride 5-10g/L, ethyl alcohol 13-20mL/L, remaining is water；Passivating solution of the present invention is without poisonous and harmful substances such as chromium, it is a kind of passivating solution of novel environment friendly, the combination of ammonium hydroxide and molybdate is complementary in passivating solution, effectively avoid the excessive zinc coat of acid leach solution, to ensure that galvanized layer thickness, molybdate is also reduced to the high request of film thickness, passivating solution is stablized, passivation technology is simple, and passivating film corrosion resistance is high, adhesive force is strong, thicknesses of layers is uniform.
Description
Technical field
The present invention relates to a kind of golden passivating solutions of electrogalvanizing alkalinity, are mainly used for the post-processing of steel-iron components electroplating surface zinc
Process, the passivating solution Chrome-free, and without acid, belong to technical field of metal material surface treatment.
Background technique
Zinc-plated is a kind of process for treating surface, in order to which the beauty or antirust of material plate one layer of zinc on its surface.The mark of zinc
Collimator electrode current potential is -0.76V, and for steel substrate, zinc coating is anode, there is good corrosion resistance, the thickness of coating
Directly affect the quality of its protective performance.Zinc coating passes through special Passivation Treatment, covers color or spread shield photo etching
Later, it can be very good enhancing protective, its dicoration can also be allowed more beautiful.
It is poor by protection materials surface that corrosion resistance is covered on the good zinc of corrosion resistance, it will be by protection materials and corrosivity
Medium separates, to achieve the purpose that control corrosion rate.It can not only be greatly improved by the corrosion resisting property of protection materials, and skill is electroplated
The advantages that art has equipment simple, and operation is easy, low in cost becomes this method and applies most common, most important anti-corrosion side
Method.If without post-processing well after zinc plating, coating will soon be dimmed, and occurs white corrosion product in succession.For
The corrosion resistance and decorative appearance performance for improving steel product, will generally be passivated processing to it after zinc-plated, make
One layer of chemical composition coating layer is formed on zinc layers surface.
Current most of production lines use chromating, and wherein Cr VI toxicity is high, and easily carcinogenic, can to environment and
Human body causes greatly to injure, and trivalent chromium can also be converted to Cr VI in long-term storage and use process, and government strictly limits
Chromate processed using and discharging.Therefore, the passivating technique that exploitation meets environmental requirement just becomes the task of top priority.
There are many acid passivation system reported at present, wherein there is the bodies such as silicate, molybdate, rare earth metal salt, organic matter
System, but galvanized sheet can dissolve a part of zinc in acid condition, thus keep electro-galvanized layer thinning, and under alkaline condition
The generation for effectively avoiding such case, ensure that the thickness of zinc coat.
Summary of the invention
The object of the present invention is to provide a kind of golden passivating solutions of electrogalvanizing alkalinity, and the pH value of the passivating solution is 8.5-9.5,
Its ingredient and content are as follows: sodium molybdate 20-30g/L, ammonium hydroxide 15-20mL/L, ammonium chloride 5-8g/L, sodium fluoride 5-10g/L, ethyl alcohol
13-20mL/L, remaining is water.
The mass fraction of the ammonium hydroxide is 25-28%.
The water is deionized water.
The preparation method of the golden passivating solution of electrogalvanizing alkalinity, specifically includes the following steps:
(1) deionized water that volume is passivating solution volume 50-70% needed for configuring is added in beaker；
(2) sodium molybdate, ethyl alcohol, ammonium chloride and the sodium fluoride of requirement are separately added into the deionized water of step (1), stirring is equal
It is even to obtain mixed solution to after being completely dissolved；
(3) ammonium hydroxide of requirement is added in the solution that step poly- (2) obtains, is stirred until homogeneous mixing；
(4) solution obtained step poly- (3) adjusts pH value to 8.5-9.5, and mends and be filled with water to required volume to get golden to alkalinity
Passivating solution.
The passivation technology of the passivating solution are as follows: see that electrogalvanizing workpiece goes out light (3% HNO3, room temperature, 5s) → passivation (room temperature,
Passivation time is 20-30s) → dry, it needs to be rinsed with water between every two procedures.
The passivating solution can be used for the surface passivating treatment technique after steel and iron parts electrogalvanizing, available after Passivation Treatment
The preferably golden passivating film of the corrosion resistance that is evenly distributed.
Beneficial effects of the present invention:
(1) passivating solution is a kind of passivating solution of environment-friendly type without poisonous and harmful substances such as chromium.
(2) passivating solution is stablized, and passivation technology is simple, and passivating film corrosion resistance is high, adhesive force is strong, thicknesses of layers is uniform.
(3) combination of ammonium hydroxide and molybdate is complementary in passivating solution, and it is excessive zinc-plated effectively to avoid acid leach solution
Layer, to ensure that galvanized layer thickness, also reduces molybdate to the high request of film thickness.
(4) carrying out treated zinc coating appearance using passivating solution of the present invention is equally distributed gold passivating film, in
It is more than 100 hours that the white rust time, which occurs, in property salt spray test.
Specific embodiment
With reference to embodiment, the present invention will be further described, but the scope of the present invention be not limited only to it is described
Content.All ranges for belonging to the present invention and being protected being modified on the basis of the present invention.
Embodiment 1
A kind of golden passivating solution of electrogalvanizing alkalinity, the pH value of passivating solution is 8.5, ingredient and content are as follows: sodium molybdate 20g/L, ammonia
Water 15mL/L, ammonium chloride 5g/L, sodium fluoride 5g/L, ethyl alcohol 13mL/L, remaining is water, and the mass fraction of ammonium hydroxide is 25%.
The preparation method of the golden passivating solution of the present embodiment electrogalvanizing alkalinity specifically includes following step by taking 1L passivating solution as an example
It is rapid:
(1) deionized water that volume is passivating solution volume 50% needed for configuring, i.e. 500mL are added in beaker；
(2) sodium molybdate (20g), ethyl alcohol (13mL), ammonium chloride (5g) of requirement are separately added into the deionized water of step (1)
With sodium fluoride (5g), it is evenly stirred until after being completely dissolved and obtains mixed solution；
(3) ammonium hydroxide (15mL) of requirement is added in the solution that step poly- (2) obtains, is stirred until homogeneous mixing；
(4) the solution benefit that step poly- (3) obtains is filled with water to required volume, the pH value of passivating solution is just 8.5 at this time, then does not have to adjust
PH value can be adjusted to get the golden passivating solution of alkalinity is arrived if not 8.5 using hydrochloric acid or ammonium hydroxide.
The passivating solution that the present embodiment obtains is used for laboratory electrogalvanizing low-carbon steel disc (40 × 50 × 1mm3) Passivation Treatment,
It after 20min is electroplated in low-carbon steel disc, puts and rinses well in deionized water, be then placed in the nitric acid that mass fraction is 3% and go out light
5s with the passivating solution immersion treatment 20s of the present embodiment, is put dry with hair dryer after rinsing well in deionized water at room temperature
It is dry.
Electrogalvanizing low-Carbon steel specimen appearance color after the present embodiment passivation is uniform, bright, in golden yellow, film adhesion
By force, resistance to neutral salt spray test can reach 100 hours；It is not light-exposed, under room temperature sealing, after passivating solution stores 180 day time,
Detect the variation of its pH value less, color, transparency are also as before, carry out the blunt of electrogalvanizing low-carbon steel disc using the passivating solution
After change processing, electrogalvanizing low-Carbon steel specimen appearance color after passivation uniformly, it is bright, in golden yellow, film adhesion is strong, it is resistance in
Property salt mist experiment can reach 95 hours,
Embodiment 2
A kind of golden passivating solution of electrogalvanizing alkalinity, the pH value of passivating solution is 9.5, ingredient and content are as follows: sodium molybdate 30g/L, ammonia
Water 20mL/L, ammonium chloride 8g/L, sodium fluoride 10g/L, ethyl alcohol 20mL/L, remaining is water, and the mass fraction of ammonium hydroxide is 28%.
The preparation method of the golden passivating solution of the present embodiment electrogalvanizing alkalinity specifically includes following step by taking 1L passivating solution as an example
It is rapid:
(1) deionized water that volume is passivating solution volume 60% needed for configuring, i.e. 600mL are added in beaker；
(2) sodium molybdate (30g), ethyl alcohol (20mL), ammonium chloride (8g) of requirement are separately added into the deionized water of step (1)
With sodium fluoride (10g), it is evenly stirred until after being completely dissolved and obtains mixed solution；
(3) ammonium hydroxide (20mL) of requirement is added in the solution that step poly- (2) obtains, is stirred until homogeneous mixing；
(4) the solution benefit that step poly- (3) obtains is filled with water to required volume, the pH value of passivating solution is just 9.5 at this time, then does not have to adjust
PH value can be adjusted to get the golden passivating solution of alkalinity is arrived if not 9.5 using hydrochloric acid or ammonium hydroxide.
The passivating solution that the present embodiment obtains is used for laboratory electrogalvanizing low-carbon steel disc (40 × 50 × 1mm3) Passivation Treatment,
Electrogalvanizing low-carbon steel disc is placed in clear water and is rinsed well, is then placed in the nitric acid that mass fraction is 3% and goes out light 5s, in room temperature
Under, with the passivating solution immersion treatment 30s of the present embodiment, put dry with hair dryer after rinsing well in deionized water.
Electrogalvanizing low-Carbon steel specimen appearance color after the present embodiment passivation is uniform, bright, in golden yellow, film adhesion
By force, resistance to neutral salt spray test can reach 120 hours；It is not light-exposed, under room temperature sealing, after passivating solution stores 180 day time,
Detect the variation of its pH value less, color, transparency are also as before, carry out the blunt of electrogalvanizing low-carbon steel disc using the passivating solution
After change processing, electrogalvanizing low-Carbon steel specimen appearance color after passivation uniformly, it is bright, in golden yellow, film adhesion is strong, it is resistance in
Property salt mist experiment can reach 115 hours,
Embodiment 3
A kind of golden passivating solution of electrogalvanizing alkalinity, the pH value of passivating solution is 9.0, ingredient and content are as follows: sodium molybdate 25g/L, ammonia
Water 18mL/L, ammonium chloride 6g/L, sodium fluoride 7g/L, ethyl alcohol 15mL/L, remaining is water, and the mass fraction of ammonium hydroxide is 26%.
The preparation method of the golden passivating solution of the present embodiment electrogalvanizing alkalinity specifically includes following step by taking 1L passivating solution as an example
It is rapid:
(1) deionized water that volume is passivating solution volume 70% needed for configuring, i.e. 700mL are added in beaker；
(2) sodium molybdate (25g), ethyl alcohol (15mL), ammonium chloride (6g) of requirement are separately added into the deionized water of step (1)
With sodium fluoride (7g), it is evenly stirred until after being completely dissolved and obtains mixed solution；
(3) ammonium hydroxide (18mL) of requirement is added in the solution that step poly- (2) obtains, is stirred until homogeneous mixing；
(4) the solution benefit that step poly- (3) obtains is filled with water to required volume, the pH value of passivating solution is just 9.0 at this time, then does not have to adjust
PH value can be adjusted to get the golden passivating solution of alkalinity is arrived if not 9.0 using hydrochloric acid or ammonium hydroxide.
The passivating solution that the present embodiment obtains is used for laboratory electrogalvanizing low-carbon steel disc (40 × 50 × 1mm3) Passivation Treatment,
It after 20min is electroplated in low-carbon steel disc, is placed in clear water and rinses well, be then placed in the nitric acid that mass fraction is 3% and go out light 5s,
At room temperature, it with the passivating solution immersion treatment 25s of the present embodiment, puts dry with hair dryer after rinsing well in deionized water.
Electrogalvanizing low-Carbon steel specimen appearance color after the present embodiment passivation is uniform, bright, in golden yellow, film adhesion
By force, resistance to neutral salt spray test can reach 110 hours；It is not light-exposed, under room temperature sealing, after passivating solution stores 180 day time,
Detect the variation of its pH value less, color, transparency are also as before, carry out the blunt of electrogalvanizing low-carbon steel disc using the passivating solution
After change processing, electrogalvanizing low-Carbon steel specimen appearance color after passivation uniformly, it is bright, in golden yellow, film adhesion is strong, it is resistance in
Property salt mist experiment can reach 100 hours.
Claims (2)
1. a kind of golden passivating solution of electrogalvanizing alkalinity, which is characterized in that the pH value of the passivating solution is 8.5-9.5, ingredient and
Content are as follows: sodium molybdate 20-30g/L, ammonium hydroxide 15-20mL/L, ammonium chloride 5-8g/L, sodium fluoride 5-10g/L, ethyl alcohol 13-20mL/L,
Remaining is water.
2. the golden passivating solution of electrogalvanizing alkalinity according to claim 1, which is characterized in that the mass fraction of the ammonium hydroxide is
25-28%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275747.2A CN109468630B (en) | 2018-10-30 | 2018-10-30 | Electrogalvanizing alkaline golden passivation solution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275747.2A CN109468630B (en) | 2018-10-30 | 2018-10-30 | Electrogalvanizing alkaline golden passivation solution |
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| CN109468630B CN109468630B (en) | 2021-02-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079998A (en) * | 1993-07-02 | 1993-12-29 | 北京化工学院 | Hydrophilic corrosion-resistant film former used and the film of aluminium heater and aluminium foil surface |
| EP1217094A2 (en) * | 2000-12-19 | 2002-06-26 | United Technologies Corporation | Compound, non-chromium conversion coatings for aluminium alloys |
| CN104911577A (en) * | 2015-06-18 | 2015-09-16 | 华南理工大学 | Chromium-free alkaline passivation solution and passivation method for aluminum alloy |
| CN105755456A (en) * | 2016-03-16 | 2016-07-13 | 昆明理工大学 | Alkaline passivation solution |
-
2018
- 2018-10-30 CN CN201811275747.2A patent/CN109468630B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079998A (en) * | 1993-07-02 | 1993-12-29 | 北京化工学院 | Hydrophilic corrosion-resistant film former used and the film of aluminium heater and aluminium foil surface |
| EP1217094A2 (en) * | 2000-12-19 | 2002-06-26 | United Technologies Corporation | Compound, non-chromium conversion coatings for aluminium alloys |
| CN104911577A (en) * | 2015-06-18 | 2015-09-16 | 华南理工大学 | Chromium-free alkaline passivation solution and passivation method for aluminum alloy |
| CN105755456A (en) * | 2016-03-16 | 2016-07-13 | 昆明理工大学 | Alkaline passivation solution |
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