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Preparation and application of an environmentally friendly insulating coating solution for oriented silicon steel

A technology of oriented silicon steel and insulating coating, applied in coatings, anti-corrosion coatings, etc., can solve the problems of iron core processing easy to generate dust, pollute the environment, waste liquid treatment, pollute the environment, etc., to solve the problem of easy generation of small holes and powder , good appearance, smooth surface effect

Active Publication Date: 2019-01-01
上海迪升防腐新材料科技有限公司
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  • Claims
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Problems solved by technology

However, these chromium compounds all contain hexavalent Cr, which pollutes the environment and troublesome waste liquid treatment during coating. Furthermore, the hexavalent Cr is reduced to trivalent Cr during sintering. Although the degree of pollution is reduced, dust is likely to be generated during iron core processing. still pollute the environment

Method used

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  • Preparation and application of an environmentally friendly insulating coating solution for oriented silicon steel
  • Preparation and application of an environmentally friendly insulating coating solution for oriented silicon steel
  • Preparation and application of an environmentally friendly insulating coating solution for oriented silicon steel

Examples

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preparation example Construction

[0033] For example, the following preparation steps can be used to prepare the silica sol of the present invention: 120 to 180 parts of silicon powder (purity is 95%, particle size is 200 mesh) is soaked in hot water at 65 ° C for 2 hours to activate it to remove its surface The inert film was then dried to keep it at 65°C. Heat 50-80 parts of water glass (modulus 2.4), 3-6 parts of ammonia water (25% by weight) and 1000 parts of deionized water to 90°C under stirring, and then add dried 120-180 Part silicon powder, control the temperature to be constant, cool down after reacting for 5 hours. Use a vacuum filter to remove unreacted silicon powder, add 3 to 6 parts of γ-glycidyl etheroxypropyltrimethoxysilane (KH560) to modify the surface of the silica sol, and add sodium hydroxide to adjust the pH The value is 9-10, and the silica sol described in the present invention is obtained. Preferably, the silicon powder is 160 parts, the water glass is 60 parts, the ammonia water is...

Embodiment 1

[0047] The environmentally friendly insulating coating solution prepared according to the formula shown in Table 1 is used to coat the oriented silicon steel. After coating, the temperature is raised at 50°C / s, dried at 320°C for 20s, and then sintered at 850°C. The duration is 30 seconds, and finally an insulating coating of 2-3 μm can be formed on the surface of the grain-oriented silicon steel.

[0048] The specific preparation steps are as follows: according to the formula ratio in Table 1, the aluminum dihydrogen phosphate solution, the zinc dihydrogen phosphate solid and deionized water are first added to the reaction vessel and stirred, and the solid boric acid is added while stirring after the zinc dihydrogen phosphate solid is completely dissolved. After the boric acid is completely dissolved, add silica sol and stir evenly, then move the above homogeneous solution to a high-speed mixer, and uniformly disperse the fumed silica solid in it at a speed of 800 rpm to final...

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Abstract

The invention belongs to the technical field of preparation of silicon steel insulating coatings and particularly relates to preparation and application of an environment-friendly insulating coating solution for oriented silicon steel. Based on the total mass, the coating solution comprises the following components by mass percent: 23-26% of an aluminium dihydrogen phosphate solution, 13-17% of zinc dihydrogen phosphate, 5-6% of boric acid, 20-25% of silica sol, 3.5-4.5% of fumed silica and the balance of water. The oriented silicon steel is coated with the environment-friendly insulating coating solution and then subjected to baking and high-temperature sintering, so that a coating is formed, and the formed coating has high interlayer resistance, meets the demand on insulation performance, and has favorable adhesiveness, surface mechanical property and processability.

Description

technical field [0001] The invention belongs to the technical field of silicon steel insulating coating preparation, and in particular relates to the preparation and application of an environmentally friendly insulating coating solution for oriented silicon steel. Background technique [0002] Oriented silicon steel is mainly used in the manufacture of transformers, large motors and transformers in the power transmission and transformation industry. It is an indispensable and important soft magnetic material for electric power, electronics and military industries. The production process of grain-oriented silicon steel is complicated, and the process parameters of each process require precise control, and the production cycle is long. Therefore, the technical level of grain-oriented silicon steel production technology is an important symbol to measure the technical level of a country's special steel manufacturing. In the production process of oriented silicon steel, in order ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/25C09D5/08C09D7/61
CPCC09D1/00C09D5/08C09D7/61
Inventor 王晨辅伟强
Owner 上海迪升防腐新材料科技有限公司
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