CN104250737A - Phosphatization technology for electrostatic spraying pre-treatment - Google Patents
Phosphatization technology for electrostatic spraying pre-treatment Download PDFInfo
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- CN104250737A CN104250737A CN201310264409.XA CN201310264409A CN104250737A CN 104250737 A CN104250737 A CN 104250737A CN 201310264409 A CN201310264409 A CN 201310264409A CN 104250737 A CN104250737 A CN 104250737A
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- Prior art keywords
- phosphatization
- phosphating solution
- workpiece
- phosphating
- treatment
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- 238000002203 pretreatment Methods 0.000 title claims abstract description 12
- 238000005516 engineering process Methods 0.000 title abstract description 8
- 238000007590 electrostatic spraying Methods 0.000 title abstract 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 12
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 12
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims abstract description 6
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 6
- 238000005488 sandblasting Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011787 zinc oxide Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 32
- 238000005507 spraying Methods 0.000 claims description 19
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 5
- 238000005238 degreasing Methods 0.000 claims description 5
- 235000011194 food seasoning agent Nutrition 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 238000005201 scrubbing Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 6
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 abstract 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 abstract 1
- 244000137852 Petrea volubilis Species 0.000 abstract 1
- 239000001099 ammonium carbonate Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 229960001484 edetic acid Drugs 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 9
- 239000010452 phosphate Substances 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 150000002696 manganese Chemical class 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a phosphatization technology for electrostatic spraying pre-treatment, a phosphatization liquid employed in the technology comprises the following components: 76-80g/L of 85% of phosphoric acid, 6-8g/L of 68% of nitric acid, 3-5g/L of zinc oxide, 2-4g/L of copper sulphate, 7-11g/L of citric acid, 3-5g/L of urotropine, 1-3g/L of ethylene diamine tetraacetic acid, 0.3-0.7g/L of OP-10, 5-8ml/L of hydrogen peroxide and the balance of water. A phosphatization technology comprises the following steps: 1)removing rust and stain: polishing by using sand paper or performing sand blasting to remove excessive rust shell and floating ash on workpieces; 2)removing oil of an organic solvent; 3)performing phosphatization treatment: preparing the above components to the phosphatization liquid, using ammonium bicarbonate to adjust the pH value of 2.0-3.0 of the phosphatization liquid, keeping the temperature of the phosphatization liquid at 10-35 DEG C, then immersing the workpiece in the phosphatization liquid for treating for 15-35 minutes, and then drying.
Description
Technical field
The present invention relates to surface treatment and technical field, particularly relates to a kind of electrostatic plastic spraying pre-treatment phosphating process.
Background technology
Electrostatic plastic spraying is that under electrostatic interaction, powder can be adsorbed in workpiece surface uniformly with electrostatic power spraying apparatus the surface of powder paint to workpiece, forms the coating of powdery; Powdery coating, through the solidification of high bake levelling, becomes the final coating of effect different (the different sorts effect of powder coating); Spraying effect physical strength, sticking power, corrosion-resistant, ageing-resistant etc. in be better than lacquer spraying technique, cost is also under the spraying paint of same effect.Therefore electrostatic plastics-spraying technology has been widely used in household electrical appliance, small household appliances, door and window, clothes hanger, the vehicles, freeway guardrail etc. field.The electrostatic plastics-spraying technology flow process of common metal material comprises greasy dirt, dust, the rusty stain of removing workpiece surface, and it is anticorrosive and can increase the phosphate coating of spray-on coating sticking power to generate one deck at workpiece surface.For adapting to the needs of electrostatic plastics-spraying technology, require that phosphatize phosphate coat has little insulation resistance as far as possible, its important channel makes phosphatize phosphate coat refinement fine and close, reduced thickness.
Traditional phosphating process, no matter high temperature, middle temperature or low temperature, mostly generally be the forms such as the zinc salt of phosphoric acid, manganese salt, calcium salt, and the common ground of these phosphate crystal conversion films is, increases of thickness heavy along with film, surface insulation resistance value increases.And having the resistance to corrosion of the phosphorization membrane of thin trend to be affected, this is that the parkerized anti-corrosion performance being widely used in electrostatic plastic spraying at present is generally all difficult to reach one of state-set standard major reason.For solving this kind of problem, the seventies Deutsches Reichs-Patent 2352659, in the zinc salt manganese system of phosphoric acid, often liter of cupric ion added containing 0.1-30 milligram plates enamelled coating to improve electrophoresis.And the traditional theory of China is thought and is not allowed cupric ion to exist in Phosphating Solution, existence depending on cupric ion can produce new uneven current potential with metal base surface in phosphatize phosphate coat, form new corrosion cell, therefore in production practice depending on there being the phosphatize phosphate coat of coppery or copper ions to be defective phosphatize phosphate coat.CN91104466.3 adds zinc nitrate, nickelous nitrate, cupric nitrate as oxidation promotor and improving agent in Phosphating Solution simultaneously, stepped a step, but etch resistant properties is desirable not enough to abolishing traditional understanding.
Summary of the invention
The object of the invention is to propose a kind of electrostatic plastic spraying pre-treatment phosphating process, this technique is by the adjustment to the component of Phosphating Solution, add appropriate cupric ion, and coordinate the adjustment of other components, make the phosphatize phosphate coat of generation thin and fine and close, there is good electroconductibility, and there is good corrosion resistance, be applicable to the pre-treatment demand of electrostatic plastic spraying.
For reaching this object, the present invention by the following technical solutions:
A kind of electrostatic plastic spraying pre-treatment phosphating process, consisting of of the Phosphating Solution that this technique adopts: 85% phosphoric acid 76-80g/L, 68% nitric acid 6-8g/L, zinc oxide 3-5g/L, copper sulfate 2-4g/L, citric acid 7-11g/L, urotropine 3-5g/L, ethylenediamine tetraacetic acid (EDTA) 1-3g/L, OP-100.3-0.7g/L, hydrogen peroxide 5-8ml/L, surplus is water; Described phosphating process is:
1) eliminate rust scrubbing: use sand papering or sandblasting to remove rust shell too much on workpiece and floating ash;
2) Solvent degreasing: by the 1st) workpiece clean gasoline or alcohol-pickled 3-5 minute after step process, then seasoning or dry up with pressurized air;
3) bonderizing: said components is prepared into Phosphating Solution, use bicarbonate of ammonia to regulate the pH value of Phosphating Solution to be 2.0-3.0, the temperature keeping Phosphating Solution is 10-35 DEG C, is then immersed in this Phosphating Solution by workpiece and processes 15-35 minute, then dry.
The present invention has following beneficial effect:
By the adjustment of the component to Phosphating Solution, add appropriate cupric ion, and coordinate the adjustment of other components, make the phosphatize phosphate coat of generation thin and fine and close, there is good electroconductibility, and there is good corrosion resistance.Compared with prior art, do not need heating when Phosphating Solution of the present invention uses, bonderizing can carry out under liquid temperature 10-35 DEG C of degree; Film forming speed is fast, adhere firmly, and resistance to corrosion is strong; Various Testing index is outstanding, more has salt spray resistance excellent especially; With low cost, easy to use, be applicable to the pre-treatment demand of electrostatic plastic spraying.
Embodiment
Embodiment one
A kind of electrostatic plastic spraying pre-treatment phosphating process, consisting of of the Phosphating Solution that this technique adopts: 85% phosphoric acid 76g/L, 68% nitric acid 8g/L, zinc oxide 3g/L, copper sulfate 4g/L, citric acid 7g/L, urotropine 5g/L, ethylenediamine tetraacetic acid (EDTA) 1g/L, OP-100.7g/L, hydrogen peroxide 5ml/L, surplus is water; Described phosphating process is:
1) eliminate rust scrubbing: use sand papering or sandblasting to remove rust shell too much on workpiece and floating ash;
2) Solvent degreasing: by the 1st) workpiece clean gasoline or alcohol-pickled 3 minutes after step process, then seasoning or dry up with pressurized air;
3) bonderizing: said components is prepared into Phosphating Solution, use bicarbonate of ammonia to regulate the pH value of Phosphating Solution to be 3.0, the temperature keeping Phosphating Solution is 10 DEG C, is then immersed in by workpiece in this Phosphating Solution and processes 35 minutes, then dry.
Embodiment two
A kind of electrostatic plastic spraying pre-treatment phosphating process, consisting of of the Phosphating Solution that this technique adopts: 85% phosphoric acid 80g/L, 68% nitric acid 6g/L, zinc oxide 5g/L, copper sulfate 2g/L, citric acid 11g/L, urotropine 3g/L, ethylenediamine tetraacetic acid (EDTA) 3g/L, OP-100.3g/L, hydrogen peroxide 8ml/L, surplus is water; Described phosphating process is:
1) eliminate rust scrubbing: use sand papering or sandblasting to remove rust shell too much on workpiece and floating ash;
2) Solvent degreasing: by the 1st) workpiece clean gasoline or alcohol-pickled 5 minutes after step process, then seasoning or dry up with pressurized air;
3) bonderizing: said components is prepared into Phosphating Solution, use bicarbonate of ammonia to regulate the pH value of Phosphating Solution to be 2.0, the temperature keeping Phosphating Solution is 35 DEG C, is then immersed in by workpiece in this Phosphating Solution and processes 15 minutes, then dry.
Embodiment three
A kind of electrostatic plastic spraying pre-treatment phosphating process, consisting of of the Phosphating Solution that this technique adopts: 85% phosphoric acid 78g/L, 68% nitric acid 7g/L, zinc oxide 4g/L, copper sulfate 3g/L, citric acid 9g/L, urotropine 4g/L, ethylenediamine tetraacetic acid (EDTA) 2g/L, OP-100.5g/L, hydrogen peroxide 7ml/L, surplus is water; Described phosphating process is:
1) eliminate rust scrubbing: use sand papering or sandblasting to remove rust shell too much on workpiece and floating ash;
2) Solvent degreasing: by the 1st) workpiece clean gasoline or alcohol-pickled 4 minutes after step process, then seasoning or dry up with pressurized air;
3) bonderizing: said components is prepared into Phosphating Solution, use bicarbonate of ammonia to regulate the pH value of Phosphating Solution to be 2.5, the temperature keeping Phosphating Solution is 25 DEG C, is then immersed in by workpiece in this Phosphating Solution and processes 20 minutes, then dry.
Claims (1)
1. an electrostatic plastic spraying pre-treatment phosphating process, it is characterized in that, consisting of of the Phosphating Solution that this technique adopts: 85% phosphoric acid 76-80g/L, 68% nitric acid 6-8g/L, zinc oxide 3-5g/L, copper sulfate 2-4g/L, citric acid 7-11g/L, urotropine 3-5g/L, ethylenediamine tetraacetic acid (EDTA) 1-3g/L, OP-100.3-0.7g/L, hydrogen peroxide 5-8ml/L, surplus is water; Described phosphating process is:
1) eliminate rust scrubbing: use sand papering or sandblasting to remove rust shell too much on workpiece and floating ash;
2) Solvent degreasing: by the 1st) workpiece clean gasoline or alcohol-pickled 3-5 minute after step process, then seasoning or dry up with pressurized air;
3) bonderizing: said components is prepared into Phosphating Solution, use bicarbonate of ammonia to regulate the pH value of Phosphating Solution to be 2.0-3.0, the temperature keeping Phosphating Solution is 10-35 DEG C, is then immersed in this Phosphating Solution by workpiece and processes 15-35 minute, then dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264409.XA CN104250737A (en) | 2013-06-26 | 2013-06-26 | Phosphatization technology for electrostatic spraying pre-treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264409.XA CN104250737A (en) | 2013-06-26 | 2013-06-26 | Phosphatization technology for electrostatic spraying pre-treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104250737A true CN104250737A (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310264409.XA Pending CN104250737A (en) | 2013-06-26 | 2013-06-26 | Phosphatization technology for electrostatic spraying pre-treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104250737A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593761A (en) * | 2015-01-14 | 2015-05-06 | 中国科学院金属研究所 | Surface antibacterial passivation solution for medical stainless steel with biosafety and passivation process |
| CN113600464A (en) * | 2021-08-25 | 2021-11-05 | 上海琥森五金机械有限公司 | Energy-saving and environment-friendly plastic spraying process |
| CN118213334A (en) * | 2024-05-21 | 2024-06-18 | 华羿微电子股份有限公司 | A power device and a pretreatment method for reducing welding voids of the power device |
-
2013
- 2013-06-26 CN CN201310264409.XA patent/CN104250737A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104593761A (en) * | 2015-01-14 | 2015-05-06 | 中国科学院金属研究所 | Surface antibacterial passivation solution for medical stainless steel with biosafety and passivation process |
| CN113600464A (en) * | 2021-08-25 | 2021-11-05 | 上海琥森五金机械有限公司 | Energy-saving and environment-friendly plastic spraying process |
| CN118213334A (en) * | 2024-05-21 | 2024-06-18 | 华羿微电子股份有限公司 | A power device and a pretreatment method for reducing welding voids of the power device |
| CN118213334B (en) * | 2024-05-21 | 2024-09-17 | 华羿微电子股份有限公司 | A power device and a pretreatment method for reducing welding voids of the power device |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20141231 |