CN103013195A - Semi-inorganic environment-friendly insulating paint for non-oriented silicon steel and coating preparation method thereof - Google Patents
Semi-inorganic environment-friendly insulating paint for non-oriented silicon steel and coating preparation method thereof Download PDFInfo
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- CN103013195A CN103013195A CN2012105507225A CN201210550722A CN103013195A CN 103013195 A CN103013195 A CN 103013195A CN 2012105507225 A CN2012105507225 A CN 2012105507225A CN 201210550722 A CN201210550722 A CN 201210550722A CN 103013195 A CN103013195 A CN 103013195A
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Abstract
The invention discloses a semi-inorganic environment-friendly insulating paint for non-oriented silicon steel and a coating preparation method thereof, and belongs to the technical field of non-oriented silicon steel paint. The semi-inorganic environment-protecting insulating paint for the non-oriented silicon steel is prepared by the following components by mass percent: 5-40% of aluminum dihydrogen phosphate, 0.5-10% of manganese dihydrogen phosphate, 1-12% of zinc dihydrogen phosphate, 0.5-1.5% of zinc oxide, 0.1-1% of magnesium oxide, 1.0-7% of boric acid, 5.0-27% of resin, 2.0-6.0% of organic solvent, 0.1-0.8% of other auxiliaries, and the balance of water. The paint is an environment-friendly paint free from chromium; at the same time, the coating is uniform in brightness, better in corrosion resistance than the ordinary phosphate coating, and good in insulation, adhesiveness, punching, weldability, heat resistance and corrosion resistance. In addition, the source of the semi-inorganic environment-friendly insulating paint for the non-oriented silicon steel is rich, so that the production cost is low, and the paint can be widely applied.
Description
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Technical field
The invention belongs to the silicon steel technical field of coatings, especially relate to the preparation method that a kind of non orientating silicon steel is used environmental protection insulation compound and coating thereof.
Background technology
Electrical steel is the extremely low silicon-iron soft magnetic alloy of a kind of carbon content, and it is mainly for the manufacture of electric motor, generator, transformer core and various telecommunication apparatus.Electrical steel coatings is divided into three major types at present: full-inorganic coating, half inorganic coating and organic coating.Total development trend is: full organic coating is eliminated gradually, and inorganic coating will progressively replace half inorganic coating.But because the conditionality of inorganic coating nature and each side, at present, electrical steel manufacturer uses more half inorganic coating that remains usually in the world.From the trend of present electrical steel coatings industry development, half inorganic phosphate salt coating becomes take kind with premium propertiess such as thermotolerances in the electrical steel coatings field with its good surface resistivity.
Half inorganic coating mainly is comprised of phosphoric acid salt, resin, inorganic fillers etc.This prescription takes full advantage of good water-fast, the insulation of the good welding property of mineral membrane and resistance toheat and organic membrane, shock resistance and adhesion property.But, in the welding processing process, can produce pore because resin volatilizees, minimum for the welding pore is down to, need in phosphoric acid salt, chromic salt insulation compound, add particle, but this powder phenomenon-tion can occur again in the punching course of processing.US Patent No. 4618377 disclosed a kind of be used for electrical steel form insulating coating inorganic/the organic coating composition, it comprises a kind of organic emulsion resin, carried out surface-treated organic resin particle with a kind of dispersion improving agent, and a kind of solution that contains at least a inorganic phosphate component.Surface treated resin particle is used to control the surfaceness of solidified coating, thereby improves its weldability.A shortcoming of this type coating is that resin particle is easy to efflorescence or peels off in the steel disc course of processing that applies.
So especially need now a kind of environment-friendly type semi-inorganic insulation coating for cold rolling non-oriented electrical steel of development to be used for overcoming to coat weak point.
Summary of the invention
The object of the invention is to overcome appeal not enough, a kind of resistant to elevated temperatures cold rolling non-orientation silicon steel insulation compound and coating production thereof are provided, this coating does not contain human body and the harmful chromic salt of environment, and in the situation that guarantee preferably interlamination resistance rate, reduce the content of free phosphorus acid group, and solved the poor problem of corrosion resistance coating by the interaction of itself and boric acid, aqueous epoxy resins.
A kind of non orientating silicon steel is characterized in that with half inorganic environment-friendly insulation compound, and each material forms by the component configuration of following per-cent:
Aluminium dihydrogen phosphate 5.0 ~ 40%
Phosphate dihydrogen manganese 0.5 ~ 10%
Primary zinc phosphate 1 ~ 12%
Zinc oxide 0.5 ~ 1.5%
Magnesium oxide 0.1 ~ 1.0%
Boric acid 1.0 ~ 7%
Resin 5.0 ~ 27%
Organic solvent 2.0%-6.0%
Other auxiliary agents 0.1 ~ 0.8%
All the other are water
Wherein said biphosphate aluminum concentration is 50%, does not contain free phosphoric acid, and consumption calculates with dry weight;
Wherein said phosphate dihydrogen manganese does not contain free phosphoric acid, and consumption calculates with dry weight;
Wherein said primary zinc phosphate does not contain free phosphoric acid, and consumption calculates with dry weight;
Wherein said resin is a kind of in acrylic resin, silicone resin, Resins, epoxy, resol, the polyamide resin;
Wherein said organic solvent is a kind of in diethylene glycol monobutyl ether, ethylene glycol, glycerol, tetrahydrofuran (THF), the fatty alcohol-polyoxyethylene ether;
Wherein said auxiliary agent is one or several the mixture in wetting agent, flow agent, the defoamer.
A kind of non orientating silicon steel prepares the method for coating with half inorganic environment-friendly insulation compound, it is characterized in that:
(1), by adding water, make the density of above-mentioned coating be controlled at 1 ~ 1.2 g/cm
3And should be 0.5 ~ 12g/m at this coating coated weight of non orientating silicon steel surface coated
2
(2), dry 40 ~ 60 s of baking, temperature is controlled at 250 ~ 400 ℃, namely forming thickness is the silicon steel insulating coating layer of 0.5 ~ 5 μ m
Zinc oxide in the coating, magnesium oxide can be the technical grade powder raw material.Boric acid in the coating can increase compactness and the surface luster of coating, can also increase the formation ability of coating when low temperature and the thermotolerance during stress relieving.Above-mentioned organic solvent can improve masking liquid to the wettability of steel plate for having good water-miscible organic solvent, reduces the generation of longitudinal stripe and prevents defective in the coating, applies evenly thereby make, and masking liquid can well cover the whole width of steel plate.
The invention has the advantages that, this coating can arrive 800 ℃ for not chromate-containing environment-friendly coating, high temperature resistant processing.This figure layer surface-brightening is even, and erosion resistance is better than general phosphate coating, and has good insulativity, tack, punching, weldability, solidity to corrosion, thermotolerance.In addition, non orientating silicon steel half inorganic environment-friendly insulation compound raw material sources of the present invention are abundant, and cost is lower, has broad application prospects.
This environment-friendly type coating can provide good surface resistivity, the interlayer power loss is down to, good water resistant vapor absorption ability is arranged, the tack good with surface of steel plate can be provided, minimum in the die wear that from the process of steel plate punching lamination processed, causes, in the lamination punching course, do not produce excessive efflorescence or do not cause the accumulation of coating at pressing equipment, the processing of annealing and carbon drop can meet with stresses, and do not produce too much welding pore, can be when making iron core employed various pharmaceutical chemicalss and resin compatible.This patent selects dihydrogen phosphate as coated body to be, with organic resin as tackiness agent, do not contain solubility sexavalent chrome or chromic salt, coating solution use and the disposal process of the coating solution that gives up in can not produce the problem of potential safety hazard and environmental pollution aspect, the coating of acquisition has significant high temperature resistant anti-and resistance to corrosion.
Embodiment
Each component and the content thereof of embodiments of the invention and corresponding Comparative Examples are as shown in table 1, press table 1 preparation masking liquid of the present invention.
Table 1: the content (percentage composition %) that the coating among the embodiment forms
| ? | Aluminium dihydrogen phosphate | Phosphate dihydrogen manganese | Primary zinc phosphate | Zinc oxide | Magnesium oxide | Boric acid | Resin | Organic solvent | Other auxiliary agents | Water |
| Embodiment 1 | 5.0 | 10 | 1.0 | 0.5 | 0.1 | 3.0 | 5.0 | 2.0 | 0.1 | Surplus |
| Embodiment 2 | 20 | 5.0 | 5.0 | 1.0 | 0.5 | 1.0 | 10 | 6.0 | 0.2 | Surplus |
| Embodiment 3 | 30 | 0.5 | 10 | 1.5 | 0.5 | 5.0 | 12 | 4.0 | 0.5 | Surplus |
| Embodiment 4 | 30 | 1.0 | 7.0 | 1.0 | 1.0 | 4.0 | 15 | 3.0 | 0.4 | Surplus |
| Embodiment 5 | 20 | 2.0 | 8.0 | 0.8 | 1.0 | 2.0 | 20 | 6.0 | 0.1 | Surplus |
| Embodiment 6 | 25 | 3.0 | 7.0 | 1.5 | 0.4 | 3.0 | 27 | 5.0 | 0.8 | Surplus |
| Embodiment 7 | 40 | 1.0 | 12 | 1.0 | 0.5 | 7.0 | 12 | 4.0 | 0.5 | Surplus |
Described in the embodiment 1 resin be silicone resin; Described organic solvent is ethylene glycol; Described other auxiliary agents are flow agent.
Described in the embodiment 2 resin be silicone resin; Described organic solvent is glycerol; Described other auxiliary agents are wetting agent.
Resin described in the embodiment 3 is Resins, epoxy; Described organic solvent is the mixture of diethylene glycol monobutyl ether, glycerol; Described other auxiliary agents are wetting agent, flow agent, defoamer.
Resin described in the embodiment 4 is Resins, epoxy; Described organic solvent is the mixture of diethylene glycol monobutyl ether, ethylene glycol; Described other auxiliary agents are wetting agent.
Resin described in the embodiment 5 is the mixture of Resins, epoxy, silicone resin; Described organic solvent is the mixture of diethylene glycol monobutyl ether, ethylene glycol, glycerol; Described other auxiliary agents are the mixture of wetting agent, defoamer.
Resin described in the embodiment 6 is the mixture of acrylic resin, Resins, epoxy, silicone resin; Described organic solvent is the mixture of ethylene glycol, glycerol; Described other auxiliary agents are flow agent, wetting agent.
Resin described in the embodiment 7 is Resins, epoxy; Described organic solvent is the mixture of diethylene glycol monobutyl ether, glycerol, fatty alcohol-polyoxyethylene ether, tetrahydrofuran (THF); Described other auxiliary agents are wetting agent, flow agent, defoamer.
The coating that makes by embodiments of the invention is coated in the thick non orientating silicon steel surface of 0.5mm, toasts 50s in 330 ℃ retort furnace, namely forms uniform insulating coating at surface of steel plate after the taking-up cooling.The performance index that record this coating are as shown in table 2:
Table 2: coating performance test
| ? | Interlamination resistance (Ω cm 2/ sheet) | Tack | Thermotolerance | Solidity to corrosion |
| Embodiment 1 | ＞20 | A | Without considerable change | ＜2 |
| Embodiment 2 | ＞20 | A | Without considerable change | ＜5 |
| Embodiment 3 | ＞20 | A | Without considerable change | ＜10 |
| Embodiment 4 | ＞20 | A | Without considerable change | ＜5 |
| Embodiment 5 | ＞20 | A | Without considerable change | ＜5 |
| Embodiment 6 | ＞20 | A | Without considerable change | ＜5 |
| Embodiment 7 | ＞20 | A | Without considerable change | ＜5 |
Annotate:
1 interlamination resistance: carry out according to the GB2522-2007 standard, recorded by the interlamination resistance instrument.
2 tacks: testing method is according to GB2522-2007, with sample around copper rod bending 180
oAfter pull straight, the cracking of observing coating with peel off situation, performance class is A, B, C, four ranks of D from high in the end.
3 thermotolerances: under the nitrogen atmosphere, 750 ℃ of lower thermal treatment 2h stress relieving.
4 solidity to corrosions: the NaCl aqueous solution; Room temperature; Spraying; 8 hours corrosion areas
Can find out from above the performance test results, non-oriented silicon steel insulating coating of the present invention has good insulativity, tack, thermotolerance and solidity to corrosion etc., the environment-friendly type coating of the present invention's development does not contain chromium, cleanliness without any pollution is a kind of good non orientating silicon steel with half inorganic environment-friendly insulating coating.
Claims (2)
1. a non orientating silicon steel is characterized in that with half inorganic environment-friendly insulation compound, and each material forms by the component configuration of following per-cent:
Aluminium dihydrogen phosphate 5.0 ~ 40%
Phosphate dihydrogen manganese 0.5 ~ 10%
Primary zinc phosphate 1 ~ 12%
Zinc oxide 0.5 ~ 1.5%
Magnesium oxide 0.1 ~ 1.0%
Boric acid 1.0 ~ 7%
Resin 5.0 ~ 27%
Organic solvent 2.0%-6.0%
Other auxiliary agents 0.1 ~ 0.8%
All the other are water
Wherein said biphosphate aluminum concentration is 50%, does not contain free phosphoric acid, and consumption calculates with dry weight;
Wherein said phosphate dihydrogen manganese does not contain free phosphoric acid, and consumption calculates with dry weight;
Wherein said primary zinc phosphate does not contain free phosphoric acid, and consumption calculates with dry weight;
Wherein said resin is a kind of in acrylic resin, silicone resin, Resins, epoxy, resol, the polyamide resin;
Wherein said organic solvent is a kind of in diethylene glycol monobutyl ether, ethylene glycol, glycerol, tetrahydrofuran (THF), the fatty alcohol-polyoxyethylene ether;
Wherein said auxiliary agent is one or several the mixture in wetting agent, flow agent, the defoamer.
2. method that adopts the described a kind of non orientating silicon steel of claim 1 to prepare coating with half inorganic environment-friendly insulation compound is characterized in that:
(1), by adding water, make the density of above-mentioned coating be controlled at 1 ~ 1.2 g/cm
3And should be 0.5 ~ 12g/m at this coating coated weight of non orientating silicon steel surface coated
2(2), dry 40 ~ 60 s of baking, temperature is controlled at 250 ~ 400 ℃, namely forming thickness is the silicon steel insulating coating layer of 0.5 ~ 5 μ m.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175681A (en) * | 2014-08-04 | 2014-12-03 | 太仓市武锋金属制品有限公司 | Novel cold-rolled silicon steel sheet |
| CN104368455A (en) * | 2014-12-16 | 2015-02-25 | 苏州华安矿业科技有限公司 | Ultrasonic impulse nozzle |
| CN104403513A (en) * | 2014-12-16 | 2015-03-11 | 苏州华安矿业科技有限公司 | Ultrasonic atomizing spray nozzle |
| CN104404502A (en) * | 2014-11-12 | 2015-03-11 | 武汉理工大学 | Phosphate based steel rebar anticorrosive coating |
| CN104559751A (en) * | 2015-01-10 | 2015-04-29 | 安徽省东瑞装饰材料有限公司 | Directly-sprayed-able high pressure device shell water-based paint and preparation method thereof |
| WO2018119986A1 (en) * | 2016-12-30 | 2018-07-05 | 黄响华 | Insulating coating material for use with silicon steel |
| CN109135385A (en) * | 2018-08-06 | 2019-01-04 | 上海大学 | The preparation method of linear resistance insulating coating |
| CN110240832A (en) * | 2019-03-07 | 2019-09-17 | 上海丰野表面处理剂有限公司 | A kind of non-orientation silicon steel chromium-free semi-organic insulating coated coating |
| CN111944422A (en) * | 2020-08-24 | 2020-11-17 | 湖北武洲新材料科技有限公司 | Low-temperature fast-curing high-temperature-resistant non-oriented electrical steel environment-friendly C6-grade insulating paint |
| CN113831773A (en) * | 2021-11-11 | 2021-12-24 | 上海迪升防腐新材料科技有限公司 | Coating solution for non-oriented silicon steel and preparation method and application thereof |
| CN115109485A (en) * | 2022-06-15 | 2022-09-27 | 山西太钢不锈钢股份有限公司 | Water-soluble environment-friendly thickening type non-oriented silicon steel insulating coating liquid and preparation method thereof |
| CN116515350A (en) * | 2023-04-11 | 2023-08-01 | 首钢智新迁安电磁材料有限公司 | Non-oriented silicon steel and coating liquid and preparation method thereof, iron core and preparation method thereof |
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| CN101560342A (en) * | 2008-12-17 | 2009-10-21 | 马鞍山钢铁股份有限公司 | Non-oriented electric steel semi-organic phosphate insulating paint with good corrosion resistance |
| CN102634243A (en) * | 2012-04-11 | 2012-08-15 | 江阴市诺科科技有限公司 | Environment-friendly insulating paint for non-oriented silicon steel and preparation method of coating thereof |
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Patent Citations (2)
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| CN101560342A (en) * | 2008-12-17 | 2009-10-21 | 马鞍山钢铁股份有限公司 | Non-oriented electric steel semi-organic phosphate insulating paint with good corrosion resistance |
| CN102634243A (en) * | 2012-04-11 | 2012-08-15 | 江阴市诺科科技有限公司 | Environment-friendly insulating paint for non-oriented silicon steel and preparation method of coating thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175681A (en) * | 2014-08-04 | 2014-12-03 | 太仓市武锋金属制品有限公司 | Novel cold-rolled silicon steel sheet |
| CN104404502A (en) * | 2014-11-12 | 2015-03-11 | 武汉理工大学 | Phosphate based steel rebar anticorrosive coating |
| CN104368455A (en) * | 2014-12-16 | 2015-02-25 | 苏州华安矿业科技有限公司 | Ultrasonic impulse nozzle |
| CN104403513A (en) * | 2014-12-16 | 2015-03-11 | 苏州华安矿业科技有限公司 | Ultrasonic atomizing spray nozzle |
| CN104559751A (en) * | 2015-01-10 | 2015-04-29 | 安徽省东瑞装饰材料有限公司 | Directly-sprayed-able high pressure device shell water-based paint and preparation method thereof |
| WO2018119986A1 (en) * | 2016-12-30 | 2018-07-05 | 黄响华 | Insulating coating material for use with silicon steel |
| CN109135385A (en) * | 2018-08-06 | 2019-01-04 | 上海大学 | The preparation method of linear resistance insulating coating |
| CN110240832A (en) * | 2019-03-07 | 2019-09-17 | 上海丰野表面处理剂有限公司 | A kind of non-orientation silicon steel chromium-free semi-organic insulating coated coating |
| CN110240832B (en) * | 2019-03-07 | 2021-07-13 | 上海丰野表面处理剂有限公司 | Chromium-free semi-organic insulating coating paint for non-oriented silicon steel |
| CN111944422A (en) * | 2020-08-24 | 2020-11-17 | 湖北武洲新材料科技有限公司 | Low-temperature fast-curing high-temperature-resistant non-oriented electrical steel environment-friendly C6-grade insulating paint |
| CN113831773A (en) * | 2021-11-11 | 2021-12-24 | 上海迪升防腐新材料科技有限公司 | Coating solution for non-oriented silicon steel and preparation method and application thereof |
| CN115109485A (en) * | 2022-06-15 | 2022-09-27 | 山西太钢不锈钢股份有限公司 | Water-soluble environment-friendly thickening type non-oriented silicon steel insulating coating liquid and preparation method thereof |
| CN116515350A (en) * | 2023-04-11 | 2023-08-01 | 首钢智新迁安电磁材料有限公司 | Non-oriented silicon steel and coating liquid and preparation method thereof, iron core and preparation method thereof |
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Application publication date: 20130403 |