CN104250765A - Phosphating solution for cathode electrophoretic coating pretreatment - Google Patents
Phosphating solution for cathode electrophoretic coating pretreatment Download PDFInfo
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- CN104250765A CN104250765A CN201310269042.0A CN201310269042A CN104250765A CN 104250765 A CN104250765 A CN 104250765A CN 201310269042 A CN201310269042 A CN 201310269042A CN 104250765 A CN104250765 A CN 104250765A
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- phosphating solution
- phosphating
- cathode electro
- coating
- zinc oxide
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Abstract
The invention discloses a phosphating solution for cathode electrophoretic coating pretreatment, and the phosphating solution comprises 33-37g / L of zinc oxide, 123-127g / L of 85% phosphoric acid, 12-14g / L of nickel sulfate, 6-8g / L of manganese carbonate, 5-7g / L of potassium chlorate, 2-4g / L of potassium fluoride, 9-11g / L of hydroxylamine sulfate, 4-6g/ L of m-nitrobenzenesulfonic acid, 17-19g / L of sodium citrate, 3-5g / L of sodium polyphosphate, 0.5-1.5g / L of triethanolamine, 1-2g / L of phytic acid, 0.2-0.6g / L of pentaerythritol octahydrogen tetraphosphate and the balance of water.
Description
Technical field
The present invention relates to technical field of surface, particularly relate to a kind of Phosphating Solution as cathode electro-coating pre-treatment.
Background technology
Phosphatization, as one of the core technology of Coating Pretreatment, is worldwide generally used and has the history of last 100 years.Current maximum phosphorization technology is Zinc phosphating technology, and the phosphatize phosphate coat main component of formation is zinc phosphate, i.e. Zn
3(PO
4)
24H
2o, is called for short [H] film.But along with Domestic Large Painting Workshop generally adopts cathode electro-coating technique, traditional Zinc phosphating technology can not meet the requirement of cathode electro-coating, because cathode electro-coating requires that phosphatize phosphate coat has good alkali resistance, electroconductibility, solidity to corrosion and sticking power, and the alkali resistance of traditional zinc phosphating film is poor, be not suitable with the requirement of cathode electro-coating.For improving the matching capacity problem of phosphatize phosphate coat and cathode electro-coating, way general is both at home and abroad: 1, adopt low zinc phosphating process technology.Namely reduce the Zn content of traditional Zinc phosphating solution, improve [P] film (Zn in phosphatize phosphate coat
2fe (PO
4)
24H
2o) content, thus the alkali resistance strengthening phosphatize phosphate coat; 2, glomerocryst phosphorization technology is adopted.Namely in traditional Phosphating Solution, a certain amount of Ni is added
2+, Mn
2+, Cu
2+, Ca
2+, Co
2+, Sn
2+etc. heavy metal ion, make these heavy metal ion participate in film forming directly, form mixing phosphatize phosphate coat crystal habit, change original intergranular district, and then improve the P film content of phosphatize phosphate coat, optimize the matching capacity with cathode electro-coating; 3, preferred Phosphating Accelerant and additive, reduces phosphatization temperature, improves phosphatization speed, reduce phosphating dregs, the crystallization of refinement phosphatization, improves stability and the work-ing life of Phosphating Solution.
The subject matter that the ternary Zn-Ni-Mn phosphorizing solution that current cathode electro-coating uses exists has: working temperature is high, and phosphating dregs is many; Composition proportion is complicated, and narrow ranges of process parameters is wayward; Nickel in Phosphating Solution, Fe content are high, and cost is higher, and the market competitiveness is poor, and nickel manganese is all poisonous heavy metal, is unfavorable for environment protection; Phosphatization speed is slow, is not suitable with the operation of application automatic production line.Chinese patent CN1221043A " zinc-nickel manganese three component system medium temperature phosphating solution " is although composition is simple, and film forming is better, less demanding to promotor, but the concentration of Phosphating Solution is large, and cost is high, and working temperature is between 55 DEG C ~ 65 DEG C, be not suitable with the requirement of low temperature phosphor, the film uniformity of formation is poor.Chinese patent CN1361309A " medium-temperature phosphorizing liquid for automobile painting " is in fact also ternary Zn-Ni-Mn phosphorizing solution, and working temperature does not meet the requirement of low temperature phosphor, and Phosphating Solution concentration is high, and the market competitiveness is poor.Chinese patent CN1401820A " normal-temperature phosphorizing liquid " is although can realize normal temperature phosphating, and film formation time is long, and phosphating dregs is many, is unsuitable for cathode electro-coating automated job.
Summary of the invention
The object of the invention is to propose a kind of Phosphating Solution as cathode electro-coating pre-treatment, this Phosphating Solution, by the adjustment to component, overcomes above-mentioned defect of the prior art, thus adapts to the demand of cathode electro-coating.
For reaching this object, the present invention by the following technical solutions:
As a Phosphating Solution for cathode electro-coating pre-treatment, this Phosphating Solution consists of: zinc oxide
33-37g/L, 85% phosphatase 11 23-127g/L, single nickel salt 12-14g/L, manganous carbonate 6-8g/L, Potcrate 5-7g/L, Potassium monofluoride 2-4g/L, oxammonium sulfate 9-11g/L, m-nitrobenzene sulfonic acid 4-6g/L, Trisodium Citrate 17-19g/L, sodium polyphosphate 3-5g/L, trolamine 0.5-1.5g/L, phytic acid 1-2g/L, pentaerythritol phosphate 0.2-0.6g/L, surplus is water.
Preferably, this Phosphating Solution consists of: zinc oxide 35g/L, 85% phosphatase 11 25g/L, single nickel salt 13g/L, manganous carbonate 7g/L, Potcrate 6g/L, Potassium monofluoride 3g/L, oxammonium sulfate 10g/L, m-nitrobenzene sulfonic acid 5g/L, Trisodium Citrate 18g/L, sodium polyphosphate 4g/L, trolamine 1.0g/L, phytic acid 1.5g/L, pentaerythritol phosphate 0.4g/L, surplus is water.
The invention has the beneficial effects as follows:
1) the current ternary Zn-Ni-Mn phosphorizing solution working temperature of the low ratio of this Phosphating Solution working temperature 55 DEG C ~ 65 DEG C reduces 30 DEG C, has saved the energy and resource, has reduced production cost.
2) this Phosphating Solution sediment is few, good stability, long service life.
3) this phosphatize phosphate coat is evenly complete, thin and fine and close, solidity to corrosion and sticking power excellent.The alkali resistance of this phosphatize phosphate coat and excellent corrosion resistance.
4) Phosphating Solution concentration of the present invention is low, and film forming speed is fast, and raw material is cheaply easy to get, and has excellent cost performance.
Embodiment
Embodiment one
As a Phosphating Solution for cathode electro-coating pre-treatment, this Phosphating Solution consists of: zinc oxide 33g/L, 85% phosphatase 11 27g/L, single nickel salt 12g/L, manganous carbonate 8g/L, Potcrate 5g/L, Potassium monofluoride 4g/L, oxammonium sulfate 9g/L, m-nitrobenzene sulfonic acid 6g/L, Trisodium Citrate 17g/L, sodium polyphosphate 5g/L, trolamine 0.5g/L, phytic acid 2g/L, pentaerythritol phosphate 0.2g/L, surplus is water.
Embodiment two
As a Phosphating Solution for cathode electro-coating pre-treatment, this Phosphating Solution consists of: zinc oxide 37g/L, 85% phosphatase 11 23g/L, single nickel salt 14g/L, manganous carbonate 6g/L, Potcrate 7g/L, Potassium monofluoride 2g/L, oxammonium sulfate 11g/L, m-nitrobenzene sulfonic acid 4g/L, Trisodium Citrate 19g/L, sodium polyphosphate 3g/L, trolamine 1.5g/L, phytic acid 1g/L, pentaerythritol phosphate 0.6g/L, surplus is water.
Embodiment three
As a Phosphating Solution for cathode electro-coating pre-treatment, this Phosphating Solution consists of: zinc oxide 35g/L, 85% phosphatase 11 25g/L, single nickel salt 13g/L, manganous carbonate 7g/L, Potcrate 6g/L, Potassium monofluoride 3g/L, oxammonium sulfate 10g/L, m-nitrobenzene sulfonic acid 5g/L, Trisodium Citrate 18g/L, sodium polyphosphate 4g/L, trolamine 1.0g/L, phytic acid 1.5g/L, pentaerythritol phosphate 0.4g/L, surplus is water.
Claims (2)
1. as a Phosphating Solution for cathode electro-coating pre-treatment, it is characterized in that, this Phosphating Solution consists of: zinc oxide 33-37g/L, 85% phosphatase 11 23-127g/L, single nickel salt 12-14g/L, manganous carbonate 6-8g/L, Potcrate 5-7g/L, Potassium monofluoride 2-4g/L, oxammonium sulfate 9-11g/L, m-nitrobenzene sulfonic acid 4-6g/L, Trisodium Citrate 17-19g/L, sodium polyphosphate 3-5g/L, trolamine 0.5-1.5g/L, phytic acid 1-2g/L, pentaerythritol phosphate 0.2-0.6g/L, surplus is water.
2. a kind of Phosphating Solution as cathode electro-coating pre-treatment as claimed in claim 1, it is characterized in that, this Phosphating Solution consists of: zinc oxide 35g/L, 85% phosphatase 11 25g/L, single nickel salt 13g/L, manganous carbonate 7g/L, Potcrate 6g/L, Potassium monofluoride 3g/L, oxammonium sulfate 10g/L, m-nitrobenzene sulfonic acid 5g/L, Trisodium Citrate 18g/L, sodium polyphosphate 4g/L, trolamine 1.0g/L, phytic acid 1.5g/L, pentaerythritol phosphate 0.4g/L, surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310269042.0A CN104250765A (en) | 2013-06-28 | 2013-06-28 | Phosphating solution for cathode electrophoretic coating pretreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310269042.0A CN104250765A (en) | 2013-06-28 | 2013-06-28 | Phosphating solution for cathode electrophoretic coating pretreatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104250765A true CN104250765A (en) | 2014-12-31 |
Family
ID=52186006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310269042.0A Pending CN104250765A (en) | 2013-06-28 | 2013-06-28 | Phosphating solution for cathode electrophoretic coating pretreatment |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115651742A (en) * | 2022-10-25 | 2023-01-31 | 常州大学 | Phosphating reaction type diamond wire drawing oil and preparation method and application thereof |
-
2013
- 2013-06-28 CN CN201310269042.0A patent/CN104250765A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115651742A (en) * | 2022-10-25 | 2023-01-31 | 常州大学 | Phosphating reaction type diamond wire drawing oil and preparation method and application thereof |
| CN115651742B (en) * | 2022-10-25 | 2023-11-14 | 常州大学 | Phosphating reaction type diamond wire drawing oil and preparation method and application thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141231 |