CN111809172A - Passivation solution for aluminum alloy template surface layer - Google Patents
Passivation solution for aluminum alloy template surface layer Download PDFInfo
- Publication number
- CN111809172A CN111809172A CN202010712430.1A CN202010712430A CN111809172A CN 111809172 A CN111809172 A CN 111809172A CN 202010712430 A CN202010712430 A CN 202010712430A CN 111809172 A CN111809172 A CN 111809172A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- mass concentration
- passivation solution
- surface layer
- alloy template
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/34—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 aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
-
- 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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/34—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 aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—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 aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
-
- 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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/46—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 aqueous acidic solutions with pH less than 6 containing oxalates
-
- 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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/46—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 aqueous acidic solutions with pH less than 6 containing oxalates
- C23C22/47—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 aqueous acidic solutions with pH less than 6 containing oxalates containing also phosphates
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention relates to a passivation solution for an aluminum alloy template surface layer, and the passivation solution for the aluminum alloy template surface layer is prepared, wherein the mass concentration of a fluorine zirconium salt is 5.0-6.0 g/L; the mass concentration of the fluotitanic acid is 8.0-10.0 g/L; the mass concentration of the film forming agent is 4.0-5.0 g/L; the mass concentration of the oxidant is 0.4-0.7 g/L; the mass concentration of the complexing agent is 7.0-9.0 g/L; the mass concentration of the additive is 5.0-7.0 g/L; the mass concentration of the chelating agent is 7.0-9.0 g/L, the chelating agent is prepared by uniformly mixing and then adjusting the pH value to an acidic condition by an acidic regulator, the working temperature is 40 ℃, and the passivation time is 60s, so that the aims of environmental protection and no pollution are fulfilled.
Description
Technical Field
The invention relates to the technical field of aluminum alloy treatment, in particular to a passivation solution for an aluminum alloy template surface layer.
Background
At present, chromate passivation solution is commonly used in the market, and the obtained passivation film has excellent corrosion resistance, low cost and simple and convenient operation, so that the chromate passivation solution is widely applied. Hexavalent chromium is readily absorbed by the body and can invade the body through the digestive, respiratory, skin and mucous membranes. When the respiratory air contains chromic anhydride with different concentrations, the respiratory air has different degrees of hoarseness and atrophy of nasal mucosa, and can also perforate nasal septum and dilate bronchus and the like when the respiratory air is serious. When entering through the digestive tract, vomiting, abdominal pain and other hazards may be caused. Dermatitis and eczema are produced by skin invasion. The most harmful is the carcinogenic danger of long-term or short-term contact or inhalation. The RoHS and WEEE regulations promulgated by the European Union state that the use of hexavalent chromium processes is prohibited or restricted, chromate processes will gradually exit the application field. Therefore, the development of non-toxic and environmentally friendly passivation technology has been a necessary trend in the field.
Along with the rapid development of super high-rise buildings in China, the requirements of the building industry on super high-rise construction technology are higher and higher, the aluminum alloy template has light dead weight, and the condition that the template bears the pressure is good, so that the aluminum alloy template is convenient for the operation of concrete mechanization and rapid construction, and has good application prospect in the building industry. However, the chemical property of the aluminum alloy is active, and in an atmospheric environment, a very thin oxide film (the thickness of the oxide film is usually several nanometers) is easily formed on the surface of the aluminum alloy, so that the aluminum alloy has a certain protective effect on a substrate. However, the natural oxide film is too thin and is easily damaged, and particularly, in an alkaline environment, when the OH < - > content is high, corrosion is easily caused. The pH value of slurry in the concrete is generally about 12.5, and the aluminum alloy template is corroded due to chemical reaction under the alkaline condition, so that the service life of the aluminum alloy template is shortened. Therefore, in order to prolong the service life of the aluminum alloy template and improve the economic benefit, the aluminum alloy template is subjected to necessary surface treatment before use. At present, methods such as molybdate passivation, rare earth metal salt passivation, cerate passivation, silicate treatment and the like are mostly used for passivating aluminum alloy, but aluminum alloy passivation films treated by the passivating agents are not ideal in color and corrosion resistance, and cannot meet engineering requirements, so that the existing problems are urgently needed to be solved.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a passivation solution for an aluminum alloy template surface layer and a preparation method thereof, so as to achieve the purposes of environmental protection and no pollution.
In order to achieve the purpose, the invention provides a passivation solution for an aluminum alloy template surface layer, which is characterized in that: the catalyst is prepared by using zirconium fluoride salt, fluotitanic acid, a film forming agent, an oxidant, a complexing agent, an additive, a chelating agent and water as main raw materials, uniformly mixing the raw materials, and then adjusting the pH value to an acidic condition by an acidic regulator, wherein the working temperature is 40 ℃, and the passivation time is 60 s.
The film forming agent forms a skeleton structure of the passivation film for complex compounds formed by the film forming agent, aluminum ions and hydroxyl ions;
the oxidant is the basic component of the passivation solution and has the function of ionizing the metal;
the chelating agent can form a stable complex with metal ions in the film forming agent under an acidic condition, so that the generation of a passivation film is accelerated;
the complexing agent has the functions of: at room temperature, the trivalent chromium ions are present in the form of stable hexahydrate, i.e., [ Cr (H)20)6】3+Kinetically stable hydrated trivalent chromium is not suitable for passivation processes. For this purpose, it is necessary to replace part of the water molecules in the hydrated ions with other ligands in order to form the kinetically less stable Cr-ligand-water mixed ligand complex which favors the progress of the passivation reaction;
preferably, the pH value of the acidic condition is 2-3, and sodium hydroxide is used for debugging and neutralizing.
Preferably, the zirconium fluoride salt is one or more of sodium zirconium fluoride, potassium zirconium fluoride, ammonium zirconium fluoride, zirconium trifluoropentanedione and zirconium hexafluoro-acetylacetonate; the film-forming agent is one or more of chromium nitrate, chromium sulfate, chromium chloride and chrome alum; the chelating agent is one or more of sodium citrate, sodium hexametaphosphate, hydrofluoric acid and sodium sulfite.
Preferably, the oxidant comprises one or more of nitrate, halate and persulfate; the complexing agent is one or more of oxalic acid, citric acid, tartaric acid and malonic acid.
The situation that trivalent chromium ions are oxidized and contain hexavalent chromium ions is prevented;
preferably, the additive consists of a metal salt, a film forming promoter, a surfactant and a thickener.
Preferably, the metal salt is one or more of Ag, Cu, Ti, Zr, Co, Ni and rare earth elements in a gorgeous system.
Play a role in film formation, adjustment of the appearance of a passive film and improvement of corrosion resistance;
preferably, the film-forming promoter is an inorganic or organic anion;
usually by NO3-、SO4 2-、F-、BF4 -、RCOOH-They mainly play a role in accelerating the film formation, thereby obtaining a thicker passivation film at normal temperature.
Preferably, the thickener is methyl cellulose or ethyl cellulose.
The water soluble thickener helps to form an optimal film during spraying and brushing by slowing down the solution growth, which also slows down the formation of powder deposits that reduce the adhesion of the coating.
In addition, the use of thickeners aids in proper film formation during large area coating and can moderate the dilution of rinse water remaining on the substrate, resulting in a film that is free of streaking defects and has better color and corrosion protection. The water-soluble thickener is generally cellulose compound, and commonly used is methylcellulose and ethylcellulose;
preferably, the surfactant is one of sodium dodecyl sulfate, sodium dodecyl sulfonate or sodium dodecyl benzene sulfonate.
Preferably, the mass concentration of the fluorozirconium salt is 5.0-6.0 g/L; the mass concentration of the fluotitanic acid is 8.0-10.0 g/L; the mass concentration of the film forming agent is 4.0-5.0 g/L; the mass concentration of the oxidant is 0.4-0.7 g/L; the mass concentration of the complexing agent is 7.0-9.0 g/L; the mass concentration of the additive is 5.0-7.0 g/L; the mass concentration of the chelating agent is 7.0-9.0 g/L, the chelating agent is prepared by uniformly mixing and then adjusting the pH value to acidic conditions by an acidic regulator, the working temperature is 40 ℃, and the passivation time is 60 s.
Compared with the prior art, the invention has the beneficial effects that:
the mechanism of formation of trivalent chromium passivation films is similar to hexavalent chromium passivation, but does not include the step of reduction of hexavalent chromium to trivalent chromium. Firstly, zinc is oxidized by an oxidant in an acidic medium and forms zinc chromium oxide with trivalent chromium, meanwhile, acid is consumed to increase the pH of a contact interface, and then trivalent chromium compounds are separated out on the surface under the condition of increasing the pH to form a colloidal film consisting of the zinc chromium oxide. Can be represented by the following steps
1) Dissolving zinc:
Zn+2H+------Zn2++H2↑
4Zn+NO3 ------9H+-----4Zn2++NH3↑+3H20
2) film formation:
Zn2++xCr3++yH20-----ZnCrxOy+2yH+
1) the passivation time of trivalent chromium is longer than that of hexavalent chromium, and the dissolved zinc coating is relatively more, so the coating is required to be thicker.
2) The trivalent chromium passivation film is compact and has no obvious cracks; the hexavalent chromium passivation film is of a criss-cross net structure, and the hexavalent chromium in the net structure has a certain self-repairing capability on the passivation film. However, the passivation film of hexavalent chromium is not compact, the content of hexavalent chromium in the net structure is limited, and when the hexavalent chromium is completely consumed and loses the self-repairing capability, corrosion and white embroidery are easily caused. The trivalent chromium passivation film has no self-repairing capability, but has a compact structure, so that the trivalent chromium passivation film has strong corrosion resistance as long as the trivalent chromium passivation film is not damaged. In order to prevent the defect of corrosion due to the destruction of the passivation film, a sealing treatment is suggested. Special care should be taken during shipping to ensure good packaging to avoid part damage.
3) In practical application, the corrosion resistance of the trivalent chromium color passive film and the black passive film of the zinc coating is weaker than that of the hexavalent chromium passive film, but the corrosion resistance of the trivalent chromium blue-white passive film is not much different from that of the hexavalent chromium blue-white passive film.
4) The pH is a very important parameter in trivalent chromium passivation, the pH range is narrow and not stable, and the adjustment is frequently determined. Mass production suggests automatic dosing with automatic dosing machines to ensure pH within the optimum process range, which directly affects the corrosion resistance and appearance of the product.
5) The trivalent chromium passivation film has better heat resistance than the hexavalent chromium passivation film, and can maintain more than 70% of the original corrosion resistance after being heated to more than 200 ℃ for a longer time, which is particularly advantageous for galvanized parts which need to be heated for dehydrogenation. When the hexavalent chromium passivation film is heated to a temperature of more than 55 ℃, the passivation film is easy to dehydrate and crack after being kept for a plurality of minutes, and a zinc coating is exposed, so that the corrosion resistance is reduced.
6) The service life of the trivalent chromium passivation solution is longer than that of hexavalent chromium.
Detailed Description
Example 1:
preparing a passivation solution for an aluminum alloy template surface layer, wherein the mass concentration of the fluorine zirconium salt is 5.0-6.0 g/L; the mass concentration of the fluotitanic acid is 8.0 g/L; the mass concentration of the film forming agent is 4.0 g/L; the mass concentration of the oxidant is 0.4 g/L; the mass concentration of the complexing agent is 7.0 g/L; the mass concentration of the additive is 5.0 g/L; the mass concentration of the chelating agent is 7.0g/L, the chelating agent is prepared by uniformly mixing and then adjusting the pH value to acidic conditions by an acidic regulator, the working temperature is 40 ℃, and the passivation time is 60 s;
the fluorozirconium salt is one or more of sodium fluorozirconium, potassium fluorozirconium, ammonium fluorozirconium, zirconium trifluoropentanedione and zirconium hexafluoro-acetylacetonate; the film-forming agent is one or more of chromium nitrate, chromium sulfate, chromium chloride and chrome alum; the chelating agent is one or more of sodium citrate, sodium hexametaphosphate, hydrofluoric acid and sodium sulfite.
The oxidant comprises one or more of nitrate, halate and persulfate; the complexing agent is one or more of oxalic acid, citric acid, tartaric acid and malonic acid.
The additive consists of metal salt, a film forming promoter, a surfactant and a thickening agent.
The metal salt is one or more of Ag, Cu, Ti, Zr, Co, Ni and rare earth elements in a multicolored system.
The film forming promoter is inorganic or organic anion.
The thickening agent is methyl cellulose or ethyl cellulose.
The surfactant is one of sodium dodecyl sulfate, sodium dodecyl sulfonate or sodium dodecyl benzene sulfonate.
Example 2:
preparing a passivation solution for an aluminum alloy template surface layer, wherein the mass concentration of the fluorine zirconium salt is 5.5 g/L; the mass concentration of the fluotitanic acid is 9 g/L; the mass concentration of the film forming agent is 4.5 g/L; the mass concentration of the oxidant is 0.55 g/L; the mass concentration of the complexing agent is 8 g/L; the mass concentration of the additive is 6 g/L; the mass concentration of the chelating agent is 8g/L, the chelating agent is prepared by uniformly mixing and then adjusting the pH value to acidic condition by an acidic regulator, the working temperature is 40 ℃, and the passivation time is 60 s;
the fluorozirconium salt is one or more of sodium fluorozirconium, potassium fluorozirconium, ammonium fluorozirconium, zirconium trifluoropentanedione and zirconium hexafluoro-acetylacetonate; the film-forming agent is one or more of chromium nitrate, chromium sulfate, chromium chloride and chrome alum; the chelating agent is one or more of sodium citrate, sodium hexametaphosphate, hydrofluoric acid and sodium sulfite.
The oxidant comprises one or more of nitrate, halate and persulfate; the complexing agent is one or more of oxalic acid, citric acid, tartaric acid and malonic acid.
The additive consists of metal salt, a film forming promoter, a surfactant and a thickening agent.
The metal salt is one or more of Ag, Cu, Ti, Zr, Co, Ni and rare earth elements in a multicolored system.
The film forming promoter is inorganic or organic anion.
The thickening agent is methyl cellulose or ethyl cellulose.
The surfactant is one of sodium dodecyl sulfate, sodium dodecyl sulfonate or sodium dodecyl benzene sulfonate.
Example 3:
preparing a passivation solution for an aluminum alloy template surface layer, wherein the mass concentration of the fluorine zirconium salt is 6.0 g/L; the mass concentration of the fluotitanic acid is 10.0 g/L; the mass concentration of the film forming agent is 5.0 g/L; the mass concentration of the oxidant is 0.7 g/L; the mass concentration of the complexing agent is 9.0 g/L; the mass concentration of the additive is 7.0 g/L; the mass concentration of the chelating agent is 9.0g/L, the chelating agent is prepared by uniformly mixing and then adjusting the pH value to acidic condition by an acidic regulator, the working temperature is 40 ℃, and the passivation time is 60 s;
the fluorozirconium salt is one or more of sodium fluorozirconium, potassium fluorozirconium, ammonium fluorozirconium, zirconium trifluoropentanedione and zirconium hexafluoro-acetylacetonate; the film-forming agent is one or more of chromium nitrate, chromium sulfate, chromium chloride and chrome alum; the chelating agent is one or more of sodium citrate, sodium hexametaphosphate, hydrofluoric acid and sodium sulfite.
The oxidant comprises one or more of nitrate, halate and persulfate; the complexing agent is one or more of oxalic acid, citric acid, tartaric acid and malonic acid.
The additive consists of metal salt, a film forming promoter, a surfactant and a thickening agent.
The metal salt is one or more of Ag, Cu, Ti, Zr, Co, Ni and rare earth elements in a multicolored system.
The film forming promoter is inorganic or organic anion.
The thickening agent is methyl cellulose or ethyl cellulose.
The surfactant is one of sodium dodecyl sulfate, sodium dodecyl sulfonate or sodium dodecyl benzene sulfonate.
Claims (10)
1. The utility model provides a passivation solution for aluminum alloy template surface course which characterized in that: the catalyst is prepared by using zirconium fluoride salt, fluotitanic acid, a film forming agent, an oxidant, a complexing agent, an additive, a chelating agent and water as main raw materials, uniformly mixing the raw materials, and then adjusting the pH value to an acidic condition by an acidic regulator, wherein the working temperature is 40 ℃, and the passivation time is 60 s.
2. The passivation solution for the surface layer of the aluminum alloy template as claimed in claim 1, wherein: and adjusting and neutralizing by using sodium hydroxide under the acidic condition, wherein the pH value of the acidic condition is 2-3.
3. The preparation method of the passivation solution for the surface layer of the aluminum alloy template, which is disclosed by claim 1, is characterized by comprising the following steps of: the fluorozirconium salt is one or more of sodium fluorozirconium, potassium fluorozirconium, ammonium fluorozirconium, zirconium trifluoropentanedione and zirconium hexafluoro-acetylacetonate; the film-forming agent is one or more of chromium nitrate, chromium sulfate, chromium chloride and chrome alum; the chelating agent is one or more of sodium citrate, sodium hexametaphosphate, hydrofluoric acid and sodium sulfite.
4. The preparation method of the passivation solution for the surface layer of the aluminum alloy template, which is disclosed by claim 1, is characterized by comprising the following steps of: the oxidant comprises one or more of nitrate, halate and persulfate; the complexing agent is one or more of oxalic acid, citric acid, tartaric acid and malonic acid.
5. The preparation method of the passivation solution for the surface layer of the aluminum alloy template, which is disclosed by claim 1, is characterized by comprising the following steps of: the additive consists of metal salt, a film forming promoter, a surfactant and a thickening agent.
6. Preparing the passivation solution for the surface layer of the aluminum alloy template as claimed in claim 5, wherein the passivation solution comprises the following components in percentage by weight: the metal salt is one or more of Ag, Cu, Ti, Zr, Co, Ni and rare earth elements in a multicolored system.
7. Preparing the passivation solution for the surface layer of the aluminum alloy template as claimed in claim 5, wherein the passivation solution comprises the following components in percentage by weight: the film forming promoter is inorganic or organic anion.
8. Preparing the passivation solution for the surface layer of the aluminum alloy template as claimed in claim 5, wherein the passivation solution comprises the following components in percentage by weight: the thickening agent is methyl cellulose or ethyl cellulose.
9. Preparing the passivation solution for the surface layer of the aluminum alloy template as claimed in claim 5, wherein the passivation solution comprises the following components in percentage by weight: the surfactant is one of sodium dodecyl sulfate, sodium dodecyl sulfonate or sodium dodecyl benzene sulfonate.
10. The preparation method of the passivation solution for the surface layer of the aluminum alloy template, which is disclosed by claim 1, is characterized by comprising the following steps of: the mass concentration of the fluorozirconium salt is 5.0-6.0 g/L; the mass concentration of the fluotitanic acid is 8.0-10.0 g/L; the mass concentration of the film forming agent is 4.0-5.0 g/L; the mass concentration of the oxidant is 0.4-0.7 g/L; the mass concentration of the complexing agent is 7.0-9.0 g/L; the mass concentration of the additive is 5.0-7.0 g/L; the mass concentration of the chelating agent is 7.0-9.0 g/L, the chelating agent is prepared by uniformly mixing and then adjusting the pH value to acidic conditions by an acidic regulator, the working temperature is 40 ℃, and the passivation time is 60 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010712430.1A CN111809172A (en) | 2020-07-22 | 2020-07-22 | Passivation solution for aluminum alloy template surface layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010712430.1A CN111809172A (en) | 2020-07-22 | 2020-07-22 | Passivation solution for aluminum alloy template surface layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111809172A true CN111809172A (en) | 2020-10-23 |
Family
ID=72862027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010712430.1A Pending CN111809172A (en) | 2020-07-22 | 2020-07-22 | Passivation solution for aluminum alloy template surface layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111809172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142055A (en) * | 2022-07-09 | 2022-10-04 | 重庆理工大学 | Hydrophobic chemical conversion film forming liquid and aluminum alloy surface treatment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070187001A1 (en) * | 2006-02-14 | 2007-08-16 | Kirk Kramer | Composition and Processes of a Dry-In-Place Trivalent Chromium Corrosion-Resistant Coating for Use on Metal Surfaces |
| CN101189073A (en) * | 2005-02-15 | 2008-05-28 | 美国海军部 | Composition and process for preparing chromium-zirconium coatings on metal substrates |
| CN103993303A (en) * | 2013-02-17 | 2014-08-20 | 武汉风帆电镀技术股份有限公司 | Trivalent-chromium anticorrosive passivating solution of aluminium and aluminium alloy |
| CN104894549A (en) * | 2015-06-18 | 2015-09-09 | 广西柳州市龙发金属表面处理技术有限公司 | Preparation technology of trivalent chromium black zinc passivating solution |
| CN106086846A (en) * | 2016-06-24 | 2016-11-09 | 中车青岛四方机车车辆股份有限公司 | Aluminium alloy non-chromium deactivating process for the treatment of and aluminium alloy non-chromium passivation treatment fluid thereof |
| CN107338429A (en) * | 2017-07-22 | 2017-11-10 | 温州裕辉新材料科技有限公司 | High anti-corrosion trivalent chromium Zincing passivation agent and preparation method thereof |
| CN109468626A (en) * | 2018-12-20 | 2019-03-15 | 中建三局第建设工程有限责任公司 | A kind of aluminum alloy mould plate surface layer passivating solution and preparation method thereof and passivation process |
-
2020
- 2020-07-22 CN CN202010712430.1A patent/CN111809172A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189073A (en) * | 2005-02-15 | 2008-05-28 | 美国海军部 | Composition and process for preparing chromium-zirconium coatings on metal substrates |
| US20070187001A1 (en) * | 2006-02-14 | 2007-08-16 | Kirk Kramer | Composition and Processes of a Dry-In-Place Trivalent Chromium Corrosion-Resistant Coating for Use on Metal Surfaces |
| CN103993303A (en) * | 2013-02-17 | 2014-08-20 | 武汉风帆电镀技术股份有限公司 | Trivalent-chromium anticorrosive passivating solution of aluminium and aluminium alloy |
| CN104894549A (en) * | 2015-06-18 | 2015-09-09 | 广西柳州市龙发金属表面处理技术有限公司 | Preparation technology of trivalent chromium black zinc passivating solution |
| CN106086846A (en) * | 2016-06-24 | 2016-11-09 | 中车青岛四方机车车辆股份有限公司 | Aluminium alloy non-chromium deactivating process for the treatment of and aluminium alloy non-chromium passivation treatment fluid thereof |
| CN107338429A (en) * | 2017-07-22 | 2017-11-10 | 温州裕辉新材料科技有限公司 | High anti-corrosion trivalent chromium Zincing passivation agent and preparation method thereof |
| CN109468626A (en) * | 2018-12-20 | 2019-03-15 | 中建三局第建设工程有限责任公司 | A kind of aluminum alloy mould plate surface layer passivating solution and preparation method thereof and passivation process |
Non-Patent Citations (2)
| Title |
|---|
| 上海市电镀协会组编: "《实用电镀技术指南》", 31 December 2019, 上海科学普及出版社 * |
| 中国汽车工程学会防腐蚀老化分会: "《汽车紧固件实用技术手册》", 30 November 2018, 中国质检出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142055A (en) * | 2022-07-09 | 2022-10-04 | 重庆理工大学 | Hydrophobic chemical conversion film forming liquid and aluminum alloy surface treatment method |
| CN115142055B (en) * | 2022-07-09 | 2024-02-23 | 重庆理工大学 | Hydrophobic chemical conversion film forming liquid and aluminum alloy surface treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109468626B (en) | Aluminum alloy template surface layer passivation solution and preparation method and passivation treatment process thereof | |
| CN101597758B (en) | Low chromium anticorrosive chemical conversion treating fluid on surface of constructive aluminium profile and use method thereof | |
| CN103741129B (en) | The high anti-corrosion blue-white deactivator of zinc coating trivalent chromium | |
| CN101876071B (en) | Environmentally-friendly black chrome-silver-free zinc-plating passivation solution and preparation method thereof | |
| CN105779983B (en) | A kind of Chrome-free color passivation solution | |
| CN1986883A (en) | Environment friendly no-chromium conversion treating solution | |
| CA2383621C (en) | Non-chromated oxide coating for aluminum substrates | |
| CN111809172A (en) | Passivation solution for aluminum alloy template surface layer | |
| CN102011118A (en) | Trivalent chromium passivating agent for zinc and zinc alloy coatings | |
| CN111040633B (en) | Spraying quick-setting waterproof coating for marine corrosion prevention and preparation and construction method thereof | |
| JPH01283386A (en) | Metal surface treatment composition and formation of protective film | |
| CN113122833B (en) | Aluminum alloy passivation method | |
| CN101608073B (en) | Composition containing silica sol and preparation method thereof | |
| CN108998784A (en) | Treatment agent and method for quickly generating rust layer on surface of weathering resistant steel without chloride ions | |
| CN111394688A (en) | Trivalent chromium passivation solution for powder zinc impregnation process | |
| CN113088952A (en) | Trivalent chromium passivator for galvanized material and preparation method and use method thereof | |
| CN109628919A (en) | The preparation of surface of steel plate passivating film and drying process | |
| CN108707887A (en) | Admiro trivalent chromium black passivation solution and preparation method thereof | |
| CN108456884A (en) | A kind of pre-treating method of magnesium alloy chromium-free conversion film homogenization | |
| CN101525748B (en) | Clean rare-earth salt passive film | |
| TWI500813B (en) | Process for forming corrosion protection layers on metal surfaces | |
| CN114752925A (en) | Formula of trivalent chromium color zinc passivator with strong antirust performance | |
| CN104342691A (en) | Zinc-coated steel plate surface passivation technology | |
| KR101655426B1 (en) | TRIVALENT CHROMATE COMPOSITION FOR RUST-PROOFING OF Zn-Ni BASED ALLOY AND METHOD FOR PREPARING THE SAME | |
| CN103205742A (en) | Chromate-free passivator for zinc coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201023 |
|
| RJ01 | Rejection of invention patent application after publication |