CN113718238A - Anticorrosive environment-friendly phosphating agent and preparation method thereof - Google Patents
Anticorrosive environment-friendly phosphating agent and preparation method thereof Download PDFInfo
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- CN113718238A CN113718238A CN202110864402.6A CN202110864402A CN113718238A CN 113718238 A CN113718238 A CN 113718238A CN 202110864402 A CN202110864402 A CN 202110864402A CN 113718238 A CN113718238 A CN 113718238A
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 36
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 36
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 19
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 18
- 229910021538 borax Inorganic materials 0.000 claims abstract description 18
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 18
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 18
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 18
- 239000011787 zinc oxide Substances 0.000 claims abstract description 18
- 239000008139 complexing agent Substances 0.000 claims abstract description 17
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 7
- YQUVCSBJEUQKSH-UHFFFAOYSA-N 3,4-dihydroxybenzoic acid Chemical group OC(=O)C1=CC=C(O)C(O)=C1 YQUVCSBJEUQKSH-UHFFFAOYSA-N 0.000 claims description 20
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 18
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 10
- MGJKQDOBUOMPEZ-UHFFFAOYSA-N N,N'-dimethylurea Chemical group CNC(=O)NC MGJKQDOBUOMPEZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000011975 tartaric acid Substances 0.000 claims description 6
- 235000002906 tartaric acid Nutrition 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 4
- 229940095064 tartrate Drugs 0.000 claims description 4
- 239000013078 crystal Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000013049 sediment Substances 0.000 abstract description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 5
- 230000032798 delamination Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010422 painting Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
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
- C23C22/07—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 phosphates
- C23C22/08—Orthophosphates
- C23C22/22—Orthophosphates containing alkaline earth metal cations
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- 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 discloses an anticorrosive environment-friendly phosphating agent and a preparation method thereof, and the phosphating agent comprises the following components in parts by mass per liter: 140-150 g of zinc oxide, 170-190 g of nitric acid, 110-130 g of phosphoric acid, 15-30 g of calcium nitrate, 1.5-2 g of sodium tetraborate, 3-4 g of stabilizer, 1-1.7 g of complexing agent, 2-4 g of assistant and the balance of water. The preparation method comprises the following steps: firstly, mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, when the temperature is reduced to be below 45 ℃, sequentially adding calcium nitrate and sodium tetraborate, sequentially adding the stabilizer, the complexing agent and the auxiliary agent, and finally adding the rest water. The invention has the technical effects that: the phosphating agent does not need to be analyzed and adjusted in the using process, and is simple and convenient to operate and applicable; and the phosphorization sediment can be reduced, the generated phosphorization film is uniform and compact, the crystal of the phosphorization film is columnar, and the corrosion resistance is higher.
Description
Technical Field
The invention belongs to the technical field of surface treatment, and particularly relates to a phosphating agent pretreated before painting and a preparation method of the phosphating agent.
Background
The metal matrix needs to be subjected to conversion film treatment on the surface in the aspects of coating, rust prevention, wear resistance, lubrication and the like, so that the metal surface characteristics are changed, the process requirements are met, the phosphating film has a certain thickness and microscopic gaps, the rust prevention, wear resistance and lubrication effects can be obtained through post-treatment, and the adhesive force of a paint film on the metal surface can be effectively increased due to the increase of the specific surface area of the surface of the metal matrix, so that the corrosion resistance of the metal is improved, and the service life of a product is prolonged.
At present, the surface of a metal workpiece is mostly chemically treated by a phosphating agent, so that a phosphate conversion film with a certain thickness, namely a phosphating film, is formed on the surface of the metal workpiece. But the phosphating agent in the market needs to control the acid ratio, the total acidity and the free acidity, and the accelerator needs to be added for frequent adjustment and analysis in the using process, so that a large amount of sediments can be generated in the process, irregular groove inversion is used for cleaning precipitates, the use is unstable and inconvenient, and the labor intensity is high.
Disclosure of Invention
Aiming at the problems of the existing phosphating agent, the invention aims to provide an anticorrosive environment-friendly phosphating agent which does not need to be analyzed and adjusted in the using process, can be normally produced and used by being prepared by water according to requirements and being heated to a specified temperature, and is simple and convenient to operate and applicable; and can reduce the phosphorization sediment. The invention also provides a preparation method of the phosphating agent.
In order to solve the technical problems, the invention provides an anticorrosive environment-friendly phosphating agent which comprises the following components in parts by mass per liter: 140-150 g of zinc oxide, 170-190 g of nitric acid, 110-130 g of phosphoric acid, 15-30 g of calcium nitrate, 1.5-2 g of sodium tetraborate, 3-4 g of stabilizer, 1-2 g of complexing agent, 2-4 g of assistant and the balance of water.
The stabilizer is protocatechuic acid. The stabilizer can stabilize acidity, and is favorable for stably controlling the acid ratio of the phosphating agent.
The complexing agent is a mixture of citric acid and tartaric acid or a mixture of citrate and tartrate. The complexing agent has the advantages of refining phosphorized crystal grains, improving the corrosion resistance of a phosphorized film and greatly reducing the generation of sediments.
The auxiliary agent is dimethyl urea or a derivative thereof. The assistant is adsorbed on the metal surface to diffuse the phosphorized crystal nucleus to four sides, which is favorable for forming columnar crystal.
The preparation method of the phosphating agent comprises the steps of firstly mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, then sequentially adding calcium nitrate and sodium tetraborate when the temperature is reduced to be below 45 ℃, then sequentially adding the stabilizing agent, the complexing agent and the auxiliary agent, adding a specified amount of material after adding one raw material and stirring to dissolve, and finally adding the rest water and stirring to obtain the phosphating agent.
The invention has the technical effects that:
because the phosphating agent has the stabilizer, the acid ratio and the acidity do not need to be analyzed and controlled in the using process when the phosphating agent is used in the phosphating part of a workpiece, so that the phosphating sediments are greatly reduced, and the adverse effect of the phosphating sediments on the environment is reduced; heavy metals such as nickel, copper and the like are not used, so that the method is safe and environment-friendly; and because the phosphating agent of the invention has the auxiliary agent, the generated phosphating film is uniform and compact, and the crystal of the phosphating film is columnar and has higher corrosion resistance.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a graph comparing the effect of low temperature phosphatizing agents on the surface of a workpiece in accordance with an embodiment of the present invention;
(A) example 1 phosphorus effect diagram;
(B) example 2 phosphorus effect diagram;
(C) example 3 phosphorus effect diagram;
(D) example 4 phosphorus effect diagram;
(E) and the phosphorization effect diagram of the existing low-temperature phosphorization agent.
Detailed Description
The invention is further illustrated by the following examples and figures:
example 1
The weight of each component is as follows according to 1 liter volume: 140g of zinc oxide, 175g of nitric acid, 110g of phosphoric acid, 15g of calcium nitrate, 2g of sodium tetraborate, 4g of a stabilizer (protocatechuic acid), 1g of a complexing agent (citric acid), 2g of an auxiliary agent (dimethyl urea), and the balance of water.
Firstly, mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, when the temperature is reduced to below 45 ℃, sequentially adding calcium nitrate and sodium tetraborate, then sequentially adding the stabilizing agent, the complexing agent and the auxiliary agent, adding a next specified amount of material after adding one raw material and stirring to dissolve, finally adding the rest water, continuously stirring for 1h, and filtering to obtain the phosphating agent.
Example 2
The weight of each component is as follows according to 1 liter volume: 150g of zinc oxide, 190g of nitric acid, 130g of phosphoric acid, 20g of calcium nitrate, 2g of sodium tetraborate, 4g of stabilizer (protocatechuic acid), 1.5g of complexing agent (tartaric acid), 4g of auxiliary agent (dimethyl urea) and the balance of water.
Firstly, mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, when the temperature is reduced to below 45 ℃, sequentially adding calcium nitrate and sodium tetraborate, then sequentially adding the stabilizing agent, the complexing agent and the auxiliary agent, adding a next specified amount of material after adding one raw material and stirring to dissolve, finally adding the rest water, continuously stirring for 1h, and filtering to obtain the phosphating agent.
Example 3
The weight of each component is as follows according to 1 liter volume: 140g of zinc oxide, 180g of nitric acid, 120 g of phosphoric acid, 30g of calcium nitrate, 2g of sodium tetraborate, 4g of a stabilizer (protocatechuic acid), 1.2 g of a complexing agent (a mixture of citric acid and tartaric acid), 3g of an auxiliary agent (dimethyl urea) and the balance of water.
Firstly, mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, when the temperature is reduced to below 45 ℃, sequentially adding calcium nitrate and sodium tetraborate, then sequentially adding the stabilizing agent, the complexing agent and the auxiliary agent, adding a next specified amount of material after adding one raw material and stirring to dissolve, finally adding the rest water, continuously stirring for 1h, and filtering to obtain the phosphating agent.
Example 4
The weight of each component is as follows according to 1 liter volume: 145g of zinc oxide, 170g of nitric acid, 125g of phosphoric acid, 25g of calcium nitrate, 1.5g of sodium tetraborate, 3g of a stabilizer (protocatechuic acid), 1.7g of a complexing agent (a mixture of citrate and tartrate), 4g of an auxiliary agent (dimethyl urea) and the balance of water.
Firstly, mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, when the temperature is reduced to below 45 ℃, sequentially adding calcium nitrate and sodium tetraborate, then sequentially adding the stabilizing agent, the complexing agent and the auxiliary agent, adding a next specified amount of material after adding one raw material and stirring to dissolve, finally adding the rest water, continuously stirring for 1h, and filtering to obtain the phosphating agent.
Comparative testing of Performance test
1. Appearance of phosphating film
The phosphating agents of examples 1 to 4 and commercial low-temperature phosphating agents were diluted 5 times with water as they were, the surfaces of metal workpieces were treated according to the standard GB/T6807-2001, the quality of the phosphating films was examined, and the color, uniformity, crystal morphology, corrosion resistance and the like of the phosphating films were tested.
The phosphorization process parameters are as follows: the phosphating workpiece is made of Q235, the phosphating temperature is 35-45 ℃, and the phosphating time is 10-15 min. The phosphating effect of the workpiece surface is shown in figure 1.
As seen from fig. 1: after the stabilizer and the assistant are used, the phosphating film on the workpiece is uniform and compact and is columnar crystal, so that the adhesion of a paint film is facilitated, and the corrosion resistance of the paint film is greatly improved.
2. Stability of phosphating agent
The phosphating agents of examples 1 to 4 and commercially available low-temperature phosphating agents were placed in closed containers, and after 24 hours at 40 ℃, the solutions were observed for changes in appearance, delamination, clarity and transparency.
3. Corrosion resistance
The phosphating agents of examples 1 to 4 and commercially available low-temperature phosphating agents were diluted 5 times with water as they were, respectively subjected to phosphating treatment, and subjected to sealing treatment with the same type of sealing agent. The brine solution with the concentration of 3.5 percent is at the temperature of 20-25 ℃.
Remarking: and testing a saline-resistant phosphating sample, and sealing by using an LD-2711 aqueous sealant after phosphating.
The results of the performance comparison test are shown in table 1:
TABLE 1 test results
| Technical project | Appearance of phosphating film | Stability of phosphating agent | Salt water resistance |
| Example 1 | Middle gray, uniform and dense, columnar crystal | Clear, transparent, without delamination and turbidity | No rust spot for 3h and slight rust for 4h |
| Example 2 | Middle gray, uniform and dense, columnar crystal | Clear, transparent, without delamination and turbidity | No rust spot for 4h and slight rust for 5h |
| Example 3 | Middle gray, uniform and dense, columnar crystal | Clear, transparent, without delamination and turbidity | 5h no rust spot |
| Example 4 | Middle gray, uniform and dense, columnar crystal | Clear, transparent, without delamination and turbidity | No rust spot for 4h and slight rust for 5h |
| Commercial phosphating agent | Light gray, uniform and dense, flaky crystal | Turbidity, no demixing and little precipitation | Slight rust in 2h |
As seen from table 1: the phosphating agent prepared by the invention can greatly reduce the precipitation of phosphating slag in the use process, does not contain heavy metal ions such as nickel, copper and the like, and reduces the pollution to the environment. The components of the phosphating agent prepared by the invention are single components, can be used after being diluted by water, does not need to analyze and adjust the acid ratio and the acidity, does not generate the phenomena of layering, turbidity and the like after being stored for a long time, and ensures the effectiveness and the quality stability of the phosphating agent.
The phosphating agent is used for pretreatment before cathodic electrophoretic painting of workpieces, has stable and reliable quality, does not need to adjust acid ratio, total acidity and free acidity in the production and application process, only needs to be added according to a specified proportion and heated to meet the process requirement, directly performs phosphating according to specified time to obtain a high-quality pretreated phosphating film, and the phosphating film is naturally stored indoors for 3 months without rusting; the phosphatized product is directly subjected to cathodic electrophoretic painting, and the paint film adhesion is 0 grade.
Claims (9)
1. An anticorrosive environment-friendly phosphating agent is characterized in that: the weight of each component is as follows according to the volume of each liter: 140-150 g of zinc oxide, 170-190 g of nitric acid, 110-130 g of phosphoric acid, 15-30 g of calcium nitrate, 1.5-2 g of sodium tetraborate, 3-4 g of stabilizer, 1-2 g of complexing agent, 2-4 g of assistant and the balance of water.
2. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that: the stabilizer is protocatechuic acid.
3. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that: the complexing agent is a mixture of citric acid and tartaric acid or a mixture of citrate and tartrate.
4. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that: the auxiliary agent is dimethyl urea and derivatives thereof.
5. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that the mass of each component is as follows by 1 liter: 140g of zinc oxide, 175g of nitric acid, 110g of phosphoric acid, 15g of calcium nitrate, 2g of sodium tetraborate, 4g of protocatechuic acid, 1g of citric acid, 2g of dimethyl urea and the balance of water.
6. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that the mass of each component is as follows by 1 liter: 150g of zinc oxide, 190g of nitric acid, 130g of phosphoric acid, 20g of calcium nitrate, 2g of sodium tetraborate, 4g of protocatechuic acid, 1.5g of tartaric acid, 4g of dimethyl urea and the balance of water.
7. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that the mass of each component is as follows by 1 liter: 140g of zinc oxide, 180g of nitric acid, 120 g of phosphoric acid, 30g of calcium nitrate, 2g of sodium tetraborate, 4g of protocatechuic acid, 1.2 g of a mixture of citric acid and tartaric acid, 3g of dimethyl urea and the balance of water.
8. The corrosion-resistant environment-friendly phosphating agent as claimed in claim 1, which is characterized in that the mass of each component is as follows by 1 liter: 145g of zinc oxide, 170g of nitric acid, 125g of phosphoric acid, 25g of calcium nitrate, 1.5g of sodium tetraborate, 3g of protocatechuic acid, 1.7g of a mixture of citrate and tartrate, 4g of dimethyl urea and the balance of water.
9. A method for preparing the corrosion-resistant environment-friendly phosphating agent as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps: firstly, mixing zinc oxide into paste by using part of water, adding nitric acid and phosphoric acid into the paste, stirring and dissolving, when the temperature is reduced to below 45 ℃, sequentially adding calcium nitrate and sodium tetraborate, then sequentially adding the stabilizing agent, the complexing agent and the auxiliary agent, adding the next specified amount of material after adding one raw material and stirring to dissolve, and finally adding the rest water and stirring to obtain the phosphating agent.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4451301A (en) * | 1982-03-18 | 1984-05-29 | Chemische Werke Huels Ag | Organic phosphating solution for the phosphating of metallic surfaces |
| CN102121103A (en) * | 2010-01-11 | 2011-07-13 | 张华斌 | Low-temperature slag-free zinc bonderite as well as preparation method and applications thereof |
| CN102167968A (en) * | 2011-03-01 | 2011-08-31 | 无锡和荣科技有限公司 | Method for nuisanceless resourceful treatment of waste mortar from silicon chip cutting |
-
2021
- 2021-07-29 CN CN202110864402.6A patent/CN113718238A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4451301A (en) * | 1982-03-18 | 1984-05-29 | Chemische Werke Huels Ag | Organic phosphating solution for the phosphating of metallic surfaces |
| CN102121103A (en) * | 2010-01-11 | 2011-07-13 | 张华斌 | Low-temperature slag-free zinc bonderite as well as preparation method and applications thereof |
| CN102167968A (en) * | 2011-03-01 | 2011-08-31 | 无锡和荣科技有限公司 | Method for nuisanceless resourceful treatment of waste mortar from silicon chip cutting |
Non-Patent Citations (1)
| Title |
|---|
| 中国科学院兰州图书馆资料室: "《资料选编（金属的防腐与焊接）》", vol. 1, 中国科学院兰州图书馆资料室, pages: 159 * |
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