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Insulating coating, electrical steel material and preparation method of electrical steel material

A technology of insulating paint and electrical steel, applied in metal material coating process, coating, device for coating liquid on the surface, etc., can solve the problems of poor punching and shearing workability and adhesion, and achieve excellent heat resistance, insulation, etc. Excellent effect

Active Publication Date: 2014-06-18
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inorganic coating also has the defects of poor punching and shearing processability and adhesion

Method used

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  • Insulating coating, electrical steel material and preparation method of electrical steel material
  • Insulating coating, electrical steel material and preparation method of electrical steel material

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preparation example Construction

[0035] The present invention also provides a method for preparing an electrical steel material, the method comprising: attaching the above-mentioned insulating coating to the electrical steel substrate, and then curing the insulating coating, and the curing temperature is 150- 250°C.

[0036] According to the preparation method of the electrical steel material of the present invention, the curing temperature is further preferably 180-210°C.

[0037] According to the preparation method of the electrical steel material of the present invention, the amount of the insulating coating may be 5-15 grams, more preferably 7.5-12.5 grams per square meter of the surface of the electrical steel substrate.

[0038] According to the preparation method of the electrical steel material of the present invention, the curing time of the curing may be 10-60s, more preferably 25-40s.

[0039]According to the preparation method of the above electrical steel material provided by the present inventi...

Embodiment 1-18

[0046] According to the component contents listed in Table 1, the components were uniformly mixed under stirring conditions to obtain insulating coatings 1-18 respectively.

[0047] Table 1

[0048]

[0049] In embodiment 1-18, the specific selection of each component is as follows:

[0050] Among the embodiment 1-5, the dihydrogen phosphate is manganese dihydrogen phosphate, the oxidant is sodium molybdate, the gamma-aminopropyltriethoxysilane that the silane coupling agent selects, the chelating agent is calcium lignosulfonate, and the acid is Boric acid, the silicate is sodium silicate, relative to 100 parts by weight of water, the content of surfactant in the auxiliary agent is 0.05 parts by weight, the content of leveling agent is 0.10 parts by weight, and the content of defoamer is 0.10 parts by weight parts, the content of the dispersant is 0.15 parts by weight.

Embodiment 6

[0052] The insulating coating was prepared according to the method of Example 1, except that the chelating agent was replaced with water of equal weight to obtain insulating coating 6.

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Abstract

The invention provides an insulating coating. The insulating coating is obtained by mixing evenly a raw material mixture; the raw material mixture contains a dihydric phosphate, an oxidizing agent, a silane coupling agent, an acid, a water soluble silicate and water; the oxidizing agent is at least one of sodium perchlorate, potassium permanganate, hydrogen peroxide, sodium chlorate, sodium nitrite, zinc nitrate, sodium persulfate, sodium bromate, ammonium peroxydisulfate, sodium molybdate and cobalt nitrate. The invention also provides an electrical steel material. The invention also provides a preparation method of the electrical steel material. The invention further provides the electrical steel material obtained according to the preparation method of the electrical steel material. The insulating coating after curing has good heat resistance, insulativity, adhesiveness, corrosion resistance, punching and shearing processability and other properties.

Description

technical field [0001] The invention relates to an insulating paint, an electrical steel material and a preparation method of the electrical steel material. Background technique [0002] Electrical steel is mainly used as core material for electric motors and transformers. In order to reduce eddy current loss, it is necessary to attach an insulating coating to the surface of the steel plate. [0003] At present, most of the electrical steel coatings at home and abroad are insulating coatings containing chromium. Chromium is an element harmful to the human body and the environment. As the world pays more and more attention to environmental protection, its use is strictly restricted. [0004] In order to meet the requirements of environmental protection, especially to meet the requirements of the RoHS directive that must be met by the home appliance manufacturing industry, environmental protection insulating coatings for electrical steel are also being developed at home and a...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D7/12C09D5/25C23C22/10B05D3/02
Inventor 董学强郭太雄徐权尹曦杨学高袁萍陈永郭华潘焱许哲峰周一林蒋英箴张爱萍
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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