CN104250746A - Low-temperature environmentally-friendly steel plate phosphatization technology - Google Patents
Low-temperature environmentally-friendly steel plate phosphatization technology Download PDFInfo
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- CN104250746A CN104250746A CN201310260021.2A CN201310260021A CN104250746A CN 104250746 A CN104250746 A CN 104250746A CN 201310260021 A CN201310260021 A CN 201310260021A CN 104250746 A CN104250746 A CN 104250746A
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Abstract
The invention discloses a low-temperature environmentally-friendly steel plate phosphatization technology. The phosphatization technology comprises the following steps: 1, alkali liquid deoiling: putting a steel plate in alkali wash water composed of 10-20g/L of industrial pure sodium hydroxide and 30-40g/L of industrial pure sodium carbonate, immersing at 60-70DEG C for 3-5min, and carrying out stirring flow in an alkali wash water tank by a stirring device; 2, water washing: flushing 2-3 times by using running water; 3, activating: activating through a conventional process; 4, water washing: flushing 2-3 times by using running water; 5, phosphatizing: dipping in a phosphatization liquid prepared in the invention for 10-30min, wherein the temperature and the pH value of the phosphatization liquid are 0-30DEG C and 1.5-3.5 respectively; 6, water washing: flushing 2-3 times by using running water; and 7, drying.
Description
Technical field
The present invention relates to technical field of surface, particularly relate to a kind of steel plate low-temperature environment-friendly phosphating process.
Background technology
Metal is before application, and general needs carries out pre-treatment in containing phosphatic solution, and form metal phosphate chemical conversion film, this technological process is referred to as phosphatization.Before application, the main purpose of phosphatization provides short-term inter process to protect to matrix metal, prevents metal to be corroded to a certain extent, and improve sticking power and the anti-corrosion capability of paint film layer.Along with the enhancing of people's environmental protection consciousness and the worsening shortages of the energy, Novel coating pre-treatment work technique is towards low temperature, less energy-consumption, low stain and hypotoxic future development.Although the phosphatization thickness that middle high temperature phosphorization liquid is formed, corrosion-resistant, cost is high, slag is many, complex process, and particularly energy consumption is large.And the use temperature of normal-temperature phosphorizing liquid is low, do not need the energy, long service life, bath maintenance is simple, and comprehensive cost is low.But the temperature of different metal bases to phosphatization has different requirements, usual same Phosphating Solution can not use at low temperature and middle high temperature range, brings restriction to the operation of phosphating process.And containing nickel salt in current most widely used Phosphating Solution, and adopt nitrite as promotor, nitrite in phosphatization working fluid is unstable in an acidic solution, need during each production to add the concentration to regulation, control indexes relative complex, will waste a large amount of short agents, also environmental pollution is more serious for the gas of generation.
Chinese patent CN1401820 discloses a kind of normal-temperature phosphorizing liquid, be made up of following substances in percentage by weight, phosphoric acid 2.0-4.0%, zinc oxide 0.4-0.6%, zinc nitrate 0.5-1.5%, nickelous nitrate 3.0-5.0%, manganous nitrate 2.0-4.0%, boron fluoric acid sodium 0.2-1.0%, sodium chlorate 2.0-3.0%, citric acid 0.5-2.0%, surplus is softening water.No matter this invention nickel salt, produce or use this Phosphating Solution, is all unfavorable for controlling Phosphating Solution performance perameter index.
Summary of the invention
The object of the invention is to propose a kind of steel plate low-temperature environment-friendly phosphating process, this technique can within the scope of 0-30 DEG C fast bonderizing surface of steel plate, and by the component of adjustment Phosphating Solution, make it not containing nitrite and nickel salt, and the phosphatize phosphate coat erosion resistance of preparation is high.
For reaching this object, the present invention by the following technical solutions:
A kind of steel plate low-temperature environment-friendly phosphating process, it is characterized in that, the Phosphating Solution that this technique adopts consists of: 85% phosphatase 11 5-19g/L, 68% nitric acid 4-6g/L, zinc oxide 17-19g/L, primary zinc phosphate 4-6g/L, iron nitrate 5-9g/L, nitrocalcite 1-2g/L, Trisodium Citrate 3-5g/L, tartrate 5-7g/L, polyoxyethylene glycol 1-2g/L, sodium chlorate 0.5-1.5g/L, oil of mirbane sodium sulfonate 2-4g/L, sodium carbonate 3-4g/L, hydrogen peroxide 1.5-2.5ml/L, thiocarbamide 3-5mg/L, surplus is water, described phosphating process is, by steel plate through following process:
1) alkali liquor oil removing: alkaline wash steel plate being put into the technical pure sodium hydroxide of 10-20g/L and the technical pure sodium carbonate composition of 30-40g/L, soaks 3-5 minute when temperature is 60-70 DEG C, adopts whipping appts to stir flowing in alkali cleaning liquid bath;
2) wash: rinse 2-3 time with the water of flowing;
3) activate: technique carries out activation treatment routinely;
4) wash: rinse 2-3 time with the water of flowing;
5) phosphatization: put into the Phosphating Solution with above-mentioned composition and flood 10-30 minute; The temperature of Phosphating Solution is 0-30 DEG C, and pH value is 1.5-3.5;
6) wash: rinse 2-3 time with the water of flowing;
7) dry.
The present invention has following beneficial effect:
(1) Phosphating Solution does not use nickel salt and nitrite, is conducive to environment protection;
(2) adopt low temperature phosphor, can use within the scope of 0-30 DEG C, spray and soaking technology can be adopted;
(3) Phosphating Solution is safeguarded simple, does not need to measure promotor index;
(4) save the use of material, promotor, not containing nitrite, does not have the waste of toxic gas generation and promotor.
Embodiment
Embodiment one
A kind of steel plate low-temperature environment-friendly phosphating process, it is characterized in that, the Phosphating Solution that this technique adopts consists of: 85% phosphatase 11 5g/L, 68% nitric acid 6g/L, zinc oxide 17g/L, primary zinc phosphate 6g/L, iron nitrate 5g/L, nitrocalcite 2g/L, Trisodium Citrate 3g/L, tartrate 7g/L, polyoxyethylene glycol 1g/L, sodium chlorate 1.5g/L, oil of mirbane sodium sulfonate 2g/L, sodium carbonate 4g/L, hydrogen peroxide 1.5ml/L, thiocarbamide 5mg/L, surplus is water
Described phosphating process is, by steel plate through following process:
1) alkali liquor oil removing: alkaline wash steel plate being put into the technical pure sodium hydroxide of 10g/L and the technical pure sodium carbonate composition of 40g/L, soaks 5 minutes, adopts whipping appts to stir flowing in alkali cleaning liquid bath when temperature is 60 DEG C;
2) wash: rinse 2 times with the water of flowing;
3) activate: technique carries out activation treatment routinely;
4) wash: rinse 2 times with the water of flowing;
5) phosphatization: put into the Phosphating Solution with above-mentioned composition and flood 10 minutes; The temperature of Phosphating Solution is 30 DEG C, and pH value is 1.5;
6) wash: rinse 2 times with the water of flowing;
7) dry.
Embodiment two
A kind of steel plate low-temperature environment-friendly phosphating process, it is characterized in that, the Phosphating Solution that this technique adopts consists of: 85% phosphatase 11 9g/L, 68% nitric acid 4g/L, zinc oxide 19g/L, primary zinc phosphate 4g/L, iron nitrate 9g/L, nitrocalcite 1g/L, Trisodium Citrate 5g/L, tartrate 5g/L, polyoxyethylene glycol 2g/L, sodium chlorate 0.5g/L, oil of mirbane sodium sulfonate 4g/L, sodium carbonate 3g/L, hydrogen peroxide 2.5ml/L, thiocarbamide 3mg/L, surplus is water
Described phosphating process is, by steel plate through following process:
1) alkali liquor oil removing: alkaline wash steel plate being put into the technical pure sodium hydroxide of 20g/L and the technical pure sodium carbonate composition of 30g/L, soaks 3 minutes, adopts whipping appts to stir flowing in alkali cleaning liquid bath when temperature is 70 DEG C;
2) wash: rinse 3 times with the water of flowing;
3) activate: technique carries out activation treatment routinely;
4) wash: rinse 3 times with the water of flowing;
5) phosphatization: put into the Phosphating Solution with above-mentioned composition and flood 30 minutes; The temperature of Phosphating Solution is 0 DEG C, and pH value is 3.5;
6) wash: rinse 2 times with the water of flowing;
7) dry.
Embodiment three
A kind of steel plate low-temperature environment-friendly phosphating process, it is characterized in that, the Phosphating Solution that this technique adopts consists of: 85% phosphatase 11 7g/L, 68% nitric acid 5g/L, zinc oxide 18g/L, primary zinc phosphate 5g/L, iron nitrate 7g/L, nitrocalcite 1.5g/L, Trisodium Citrate 4g/L, tartrate 6g/L, polyoxyethylene glycol 1.5g/L, sodium chlorate 1.0g/L, oil of mirbane sodium sulfonate 3g/L, sodium carbonate 3.5g/L, hydrogen peroxide 2ml/L, thiocarbamide 4mg/L, surplus is water
Described phosphating process is, by steel plate through following process:
1) alkali liquor oil removing: alkaline wash steel plate being put into the technical pure sodium hydroxide of 15g/L and the technical pure sodium carbonate composition of 35g/L, soaks 4 minutes, adopts whipping appts to stir flowing in alkali cleaning liquid bath when temperature is 65 DEG C;
2) wash: rinse 3 times with the water of flowing;
3) activate: technique carries out activation treatment routinely;
4) wash: rinse 3 times with the water of flowing;
5) phosphatization: put into the Phosphating Solution with above-mentioned composition and flood 20 minutes; The temperature of Phosphating Solution is 15 DEG C, and pH value is 2.5;
6) wash: rinse 3 times with the water of flowing;
7) dry.
Claims (1)
1. a steel plate low-temperature environment-friendly phosphating process, it is characterized in that, it is characterized in that, the Phosphating Solution that this technique adopts consists of: 85% phosphatase 11 5-19g/L, 68% nitric acid 4-6g/L, zinc oxide 17-19g/L, primary zinc phosphate 4-6g/L, iron nitrate 5-9g/L, nitrocalcite 1-2g/L, Trisodium Citrate 3-5g/L, tartrate 5-7g/L, polyoxyethylene glycol 1-2g/L, sodium chlorate 0.5-1.5g/L, oil of mirbane sodium sulfonate 2-4g/L, sodium carbonate 3-4g/L, hydrogen peroxide 1.5-2.5ml/L, thiocarbamide 3-5mg/L, surplus is water, and described phosphating process is, by steel plate through following process:
1) alkali liquor oil removing: alkaline wash steel plate being put into the technical pure sodium hydroxide of 10-20g/L and the technical pure sodium carbonate composition of 30-40g/L, soaks 3-5 minute when temperature is 60-70 DEG C, adopts whipping appts to stir flowing in alkali cleaning liquid bath;
2) wash: rinse 2-3 time with the water of flowing;
3) activate: technique carries out activation treatment routinely;
4) wash: rinse 2-3 time with the water of flowing;
5) phosphatization: put into the Phosphating Solution with above-mentioned composition and flood 10-30 minute; The temperature of Phosphating Solution is 0-30 DEG C, and pH value is 1.5-3.5;
6) wash: rinse 2-3 time with the water of flowing;
7) dry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310260021.2A CN104250746A (en) | 2013-06-26 | 2013-06-26 | Low-temperature environmentally-friendly steel plate phosphatization technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310260021.2A CN104250746A (en) | 2013-06-26 | 2013-06-26 | Low-temperature environmentally-friendly steel plate phosphatization technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929293A (en) * | 2015-06-03 | 2015-09-23 | 安徽鸿路钢结构(集团)股份有限公司 | Treatment method of galvanized bottom plate of floor support plate of steel bar truss |
| CN105463426A (en) * | 2015-12-31 | 2016-04-06 | 芜湖奕辰模具科技有限公司 | Steel plate phosphating method |
| CN110467867A (en) * | 2019-07-23 | 2019-11-19 | 北京易净星科技有限公司 | The method of derusting self-cleaning coat and preparation derusting self-cleaning coat |
| CN113500356A (en) * | 2021-07-13 | 2021-10-15 | 安徽长江紧固件有限责任公司 | Pretreatment process of acid-free high-strength anti-delayed fracture weather-resistant fastener |
-
2013
- 2013-06-26 CN CN201310260021.2A patent/CN104250746A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929293A (en) * | 2015-06-03 | 2015-09-23 | 安徽鸿路钢结构(集团)股份有限公司 | Treatment method of galvanized bottom plate of floor support plate of steel bar truss |
| CN105463426A (en) * | 2015-12-31 | 2016-04-06 | 芜湖奕辰模具科技有限公司 | Steel plate phosphating method |
| CN110467867A (en) * | 2019-07-23 | 2019-11-19 | 北京易净星科技有限公司 | The method of derusting self-cleaning coat and preparation derusting self-cleaning coat |
| CN113500356A (en) * | 2021-07-13 | 2021-10-15 | 安徽长江紧固件有限责任公司 | Pretreatment process of acid-free high-strength anti-delayed fracture weather-resistant fastener |
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Application publication date: 20141231 |