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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: 2010-03-03
艾宝魁
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  • 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

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] According to the following ratio, prepare the electrical steel insulating 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-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 a mixture of cerium nitrate and yttrium nitrate, The mass mixing ratio of the cerium nitrate and the yttrium nitrate is 7:3.

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

[0130] When preparing t...

Embodiment 2

[0148] Except for the following differences, the same as in Example 1, the electrical steel insulating paint of the present invention was prepared and coated on the 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 paint 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 the zirconium nitrate is 6:4.

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

Embodiment 3

[0168] Except for the following differences, the same as in Example 1, the electrical steel insulating paint of the present invention was prepared and coated on the 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] 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 this embodiment, the peroxide is selected from the complexes of sodium peroxide, magnesium peroxide and calcium peroxide, and the mass mixing ratio of the sodium peroxide to magnesium peroxide and calcium peroxide is 4:3: 3.

[0178] In this embodiment, when preparing the rare earth-contai...

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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 priceratio, strong market competitiveness and wide application prospects.

Description

technical field [0001] The present invention relates to the field of metal surface treatment, and more particularly, the present invention relates to an electrical steel insulating coating, 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 cores and various electrical components. The electrical steel insulating paint and the preparation method of the present invention have good insulation, Coating performance, higher interlayer resistance, and higher breakdown resistance, environmental protection performance, adhesion, etc. Background technique [0002] Ultra-low carbon ferrosilicon alloys with a silicon content of 0.5% to 4.5% are generally referred to as silicon steels, and ultra-low carbon steel plates with a silicon content of less than 0.5% are called low-carbon electrical steel plates, and the two are collectively referred t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12C09D5/25
Inventor 艾宝魁
Owner 艾宝魁
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