Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electric steel insulating paint, and preparation method and coating method thereof

A technology of insulating coating and electrical steel, applied in the direction of coating, etc., can solve the problems of low proportion of inorganic components, safety and high price, environmental pollution, etc., to improve coating adhesion performance, improve machinery, improve coating insulation performance and The effect of heat resistance

Inactive Publication Date: 2012-08-22
艾宝魁
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, there are some problems in the chromium-free water-based coating liquid for silicon steel sheets used in domestic production: firstly, in the non-volatile composition of the coating liquid, the proportion of inorganic components is relatively small, generally accounting for 10-35% of the solid components
However, during the welding process, the volatilization of the resin can produce too many pores. In order to minimize the welding pores caused by the volatilization of the resin during this process, it is necessary to add particles to the phosphate and chromate insulating coatings. There will also be pulverization during the punching and shearing process
Moreover, since this type of coating contains soluble hexavalent chromium into chromate, there will be safe and expensive waste during the coating of the coating, the processing and use of the coated steel plate, and the disposal of the waste coating solution. Environmental Pollution Issues

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] According to the following proportions, prepare electrical steel insulation paint of the present invention:

[0120] Al(H 2 PO 4 ) 3 30%,

[0121] SiO 2 Colloid 1%,

[0122] h 3 PO 4 3%,

[0123] MgO 4%,

[0124] Contains rare earth nitrate additive 1%,

[0125] Silane coupling agent WD60 2%,

[0126] Silane coupling agent 26M 1%,

[0127] The rest is deionized water.

[0128] In this embodiment, the rare earth nitrate additive of the electrical steel insulating coating component is a solution of rare earth nitrate, boric acid, nitric acid and peroxide, and the rare earth nitrate is a mixture of cerium nitrate and yttrium nitrate, The mass mixing ratio of the cerium nitrate and yttrium nitrate is 7:3.

[0129] In this embodiment, the peroxide is selected from complexes of water peroxide and sodium peroxide, and the mass ratio of water peroxide and sodium peroxide is 8:2.

[0130] When preparing the rare eart...

Embodiment 2

[0148] Except the following difference, other is the same as embodiment 1, prepares electrical steel insulating paint of the present invention, and coats on electrical steel sheet:

[0149] Al(H 2 PO 4 ) 3 25%,

[0150] SiO 2 Colloid 1.5%,

[0151] h 3 PO 4 4%,

[0152] MgO 5%,

[0153] Rare earth nitrate additive 0.2%,

[0154] Silane coupling agent WD20 2%,

[0155] The rest is solvent water.

[0156] In this embodiment, the rare earth nitrate-containing additive of the electrical steel insulating coating component is a solution of rare earth nitrate, boric acid, nitric acid and peroxide, and the rare earth nitrate is a mixture of cerium nitrate and zirconium nitrate, The mass mixing ratio of the cerium nitrate and zirconium nitrate is 6:4.

[0157] In the present embodiment, the peroxide is selected from complexes of water peroxide, magnesium peroxide, and calcium peroxide, and the mass ratio of water peroxide, magnesium peroxide...

Embodiment 3

[0168] Except the following difference, other is the same as embodiment 1, prepares electrical steel insulating paint of the present invention, and coats on electrical steel sheet:

[0169] Al(H 2 PO 4 ) 3 40%,

[0170] SiO 2 Colloid 2%,

[0171] h 3 PO 4 5%,

[0172] MgO 1%,

[0173] Contains rare earth nitrate additive 0.4%,

[0174] Silane coupling agent 26M 4%,

[0175] The rest is solvent water.

[0176] In this embodiment, the rare earth nitrate-containing additive of the electrical steel insulating paint component is a solution of rare earth nitrate, boric acid, nitric acid and peroxide, and the rare earth nitrate is cerium nitrate.

[0177] In the present embodiment, the peroxide is selected from the complexes of sodium peroxide, magnesium peroxide, and calcium peroxide, and the mass ratio of the sodium peroxide, magnesium peroxide, and calcium peroxide is 4:3: 3.

[0178] In this embodiment, when preparing the rare e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
service temperatureaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an electric steel insulating paint, and a preparation method and a coating method thereof. The electric steel insulating paint is prepared from the following components by mass percent: 25-65% of aluminium dihydrogen phosphate, 0.5-3% of silica sol, 1-5% of phosphoric acid, 1-5% of magnesium oxide, 0.1-1% of nitrate additive containing rare earth, 1-5% of silane coupling agent and the balance water as a solvent. The thickness of the electric steel insulating paint is 0.3-8 mu m. The electric steel insulating paint has the advantages of favorable insulating property, favorable coating performance, high interface resistance, high breakdown resistance, high corrosion resistance, high adhesion property and the like. The environmental-protection insulating paint does not contain chromium, and thereby being clean and having no pollution. In addition, the electric steel insulating paint also has the advantages of rich material sources, low cost, high performance price ratio, strong market competitiveness and wide application prospects.

Description

technical field [0001] The invention relates to the field of metal surface treatment, more specifically, the invention relates to an insulating coating for electrical steel, a preparation method and a coating method thereof. The electrical steel insulating paint can be used to manufacture non-oriented or oriented silicon steel for various motors, transformers, ballast iron cores and various electrical components. The electrical steel insulating paint of the present invention and its preparation method have good insulation, Coating performance, high interlayer resistance, high breakdown resistance, environmental performance, adhesion, etc. Background technique [0002] The ultra-low carbon ferrosilicon alloy with a silicon content of 0.5% to 4.5% is commonly referred to as silicon steel, and the ultra-low carbon steel plate with a silicon content of less than 0.5% is called low-carbon electrical steel plate, and both are collectively referred to as electrical steel plate. El...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/12C09D5/25
Inventor 艾宝魁
Owner 艾宝魁
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com