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Insulation coating coated on surface of oriented silicon steel strip

A technology of oriented silicon steel and insulating coatings, applied in anti-corrosion coatings, coatings, etc., can solve problems such as insufficient, and achieve the effect of good adhesion, good corrosion resistance, corrosion resistance or rust resistance.

Active Publication Date: 2012-07-11
无锡华精新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the oriented silicon steel strip is annealed at high temperature, a layer of insulating magnesium silicate (Mg 2 SiO 4 ) bottom layer, the surface has a certain insulation performance, and its interlayer resistance value is about 5 (Ω.cm 2 ), but this is not enough, especially for the iron core of large and medium-sized transformers and some high-frequency electrical appliances, 5(Ω.cm 2 ) interlayer resistance is far from enough, the surface of the steel strip must also be coated with insulating varnish, and through the baking of the subsequent process, the surface of the oriented silicon steel strip forms an insulating varnish film about 3 μm thick on each side, so that the layer of the oriented steel strip inter-resistance to achieve the required

Method used

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  • Insulation coating coated on surface of oriented silicon steel strip
  • Insulation coating coated on surface of oriented silicon steel strip
  • Insulation coating coated on surface of oriented silicon steel strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The following process technology and parameters are used:

[0059] 1. The formula components are: chromic anhydride (CrO 3 ), silica sol (SiO 2 .nH 2 O), aluminum dihydrogen phosphate [Al(H 2 PO 4 ) 3 ], water (H 2 O).

[0060] 2. The quality requirements of formula components are:

[0061] (1) Chromic anhydride (CrO 3 ):

[0062] Content: ≥99.5%

[0063] Chloride (Cl - ): ≤0.005%

[0064] Sulfate (SO 4 -2 ): ≤0.1%

[0065] Iron content≤0.005%

[0066] Water insoluble matter: ≤0.05%

[0067] Appearance: purple flake;

[0068] (2) Silica sol (SiO 2 .nH 2 O)

[0069] Content: 30±1.0%

[0070] Sodium oxide: less than 0.3%

[0071] Viscosity (25°C): less than 6.0CP;

[0072] Particle size: 10-20μm

[0073] Specific gravity (25°C): 1.201-1.210;

[0074] (3) Aluminum dihydrogen phosphate [Al(H 2 PO 4 ) 3 ]

[0075] Content: 50±1.0%

[0076] Phosphorus pentoxide (P 2 o 5 ): 33±1.0%

[0077] Aluminum oxide (Al 2 o 3 ): 8.5±0.5%

[0078] Ferric ...

Embodiment 2

[0101] The following process technology and parameters are used:

[0102] 1. The formula components are: chromic anhydride (CrO 3 ), silica sol (SiO 2 .nH 2 O), aluminum dihydrogen phosphate [Al(H 2 PO 4 ) 3 ], water (H 2 O).

[0103] 2. The quality requirements of formula components are:

[0104] (1) Chromic anhydride (CrO 3 ):

[0105] Content: ≥99.5%

[0106] Chloride (Cl - ): ≤0.005%

[0107] Sulfate (SO 4 -2 ): ≤0.1%

[0108] Iron content≤0.005%

[0109] Water insoluble matter: ≤0.05%

[0110] Appearance: purple flake;

[0111] (2) Silica sol (SiO 2 .nH 2 O)

[0112] Content: 30±1.0%

[0113] Sodium oxide: less than 0.3%

[0114] Viscosity (25°C): less than 6.0CP;

[0115] Particle size: 10-20μm

[0116] Specific gravity (25°C): 1.201-1.210;

[0117] (3) Aluminum dihydrogen phosphate [Al(H 2 PO 4 ) 3 ]

[0118] Content: 50±1.0%

[0119] Phosphorus pentoxide (P 2 o 5 ): 33±1.0%

[0120] Aluminum oxide (Al 2 o 3 ): 8.5±0.5%

[0121] Ferri...

Embodiment 3

[0143] The following process technology and parameters are used:

[0144] 1. The formula components are: chromic anhydride (CrO 3 ), silica sol (SiO 2 .nH 2 O), aluminum dihydrogen phosphate [Al(H 2 PO 4 ) 3 ], water (H 2 O).

[0145] 2. The quality requirements of formula components are:

[0146] (1) Chromic anhydride (CrO 3 ):

[0147] Content: ≥99.5%

[0148] Chloride (Cl - ): ≤0.005%

[0149] Sulfate (SO 4 -2 ): ≤0.1%

[0150] Iron content≤0.005%

[0151] Water insoluble matter: ≤0.05%

[0152] Appearance: purple flake;

[0153] (2) Silica sol (SiO 2 .nH 2 O)

[0154] Content: 30±1.0%

[0155] Sodium oxide: less than 0.3%

[0156] Viscosity (25°C): less than 6.0CP;

[0157] Particle size: 10-20μm

[0158] Specific gravity (25°C): 1.201-1.210;

[0159] (3) Aluminum dihydrogen phosphate [Al(H 2 PO 4 ) 3 ]

[0160] Content: 50±1.0%

[0161] Phosphorus pentoxide (P 2 o 5 ): 33±1.0%

[0162] Aluminum oxide (Al2 o 3 ): 8.5±0.5%

[0163] Ferric ...

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Abstract

The invention discloses an insulation coating coated on the surface of an oriented silicon steel strip, wherein the formula of the insulation coating contains the following components: 1 part of chromic anhydride, 5.5-6.5 parts of water, 11.5-12.5 parts of silicic acid aluminium dihydrogen and 13.5-14.5 parts of silica solutions, and the adding sequence of the formula is silicic acid aluminium dihydrogen, silica solutions, water and chromic anhydride. The insulation coating increases interlamination resistance of oriented silicon steel to be as large as 35-50 ohm / square centimeter and has good corrosion resistant effect, and a coating layer of the insulation coating cannot fall off after punching shearing or stress relief annealing and has good adhesiveness. The surface of the oriented silicon steel strip and transformer oil generate no chemical reaction so that the insulation coating is good in corrosion resistance or antirust performance.

Description

technical field [0001] The invention relates to a formula of an insulating paint coated on the surface of an oriented silicon steel strip, which is applied to the insulation of the surface of an oriented silicon steel strip and belongs to the technical field of functional magnetic materials. Background technique [0002] Oriented silicon steel strip is a new type of functional magnetic material. Because of its high resistance, the electric energy consumed on the iron core is small during operation; because its magnetization has strong directionality, the magnetic field in the desired direction High sensitivity, high utilization rate of iron core, high operating efficiency, cold-rolled oriented silicon steel strip is the most critical and important iron core material in electromagnetic directional conversion products such as transformers and transformers, the production technology level of cold-rolled oriented silicon steel strip, directly It is related to the upgrading of a ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08C09D7/12
Inventor 龚建达
Owner 无锡华精新材股份有限公司
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