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A kind of chrome-free insulating coating composition and its preparation method and grain-oriented silicon steel plate

A technology of insulating coating and composition, which is applied in the field of oriented silicon steel plate, chromium-free insulating coating composition and its preparation, can solve the problems that the comprehensive performance of the coating cannot be realized, and achieve excellent adhesion and excellent magnetic performance improvement effect , the effect of strong surface tension

Active Publication Date: 2018-04-03
WUHAN YUANRONG TECH CO LTD
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Problems solved by technology

However, no matter which of the above technologies is used, the overall performance of the coating cannot be achieved to achieve the performance equivalent to that of chromium-containing coatings.

Method used

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  • A kind of chrome-free insulating coating composition and its preparation method and grain-oriented silicon steel plate
  • A kind of chrome-free insulating coating composition and its preparation method and grain-oriented silicon steel plate
  • A kind of chrome-free insulating coating composition and its preparation method and grain-oriented silicon steel plate

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preparation example Construction

[0039] The present invention also provides a preparation method of the chrome-free insulating coating composition, comprising the steps of:

[0040] Add phosphate solution, boric acid and water, stir;

[0041] Add selenium dioxide and organic acid successively, stir;

[0042] Add metal oxide and / or metal hydroxide and molybdate, make pH be 1-5,

[0043] Add the silica sol and stir to obtain the chromium-free insulating coating composition.

[0044] The present invention also provides an oriented silicon steel sheet, which includes a substrate and a chromium-free insulating coating formed on the surface of the substrate, the chromium-free insulating coating is obtained by coating a chromium-free insulating coating composition on the surface of the substrate, The specific method is: coating the chrome-free insulating coating composition on the grain-oriented silicon steel sheet, drying the coated coating composition at a temperature of 350-500°C for 30s-80s, and then drying th...

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Abstract

A chromium-free insulation coating composition includes 100 parts by weight of a phosphate solution, 1-5 parts by weight of molybdate, 50-150 parts by weight of silica sol, 3-13 parts by weight of selenium dioxide, 1-10 parts by weight of metal oxide and / or metal hydroxide, 5-15 parts by weight of organic acid, 1-6 parts by weight of boric acid, and 100-300 parts by weight of water.

Description

technical field [0001] The invention belongs to the technical field of silicon steel, and in particular relates to a chromium-free insulating coating composition, a preparation method thereof, and an oriented silicon steel plate. Background technique [0002] As an important magnetic material, grain-oriented silicon steel has excellent properties of high magnetic induction and low iron loss, and is often widely used as the core material of power transformers. The insulating coating coated on the surface of oriented silicon steel not only has the functions of anti-rust, corrosion resistance and insulation, but also the tension generated on the surface can also reduce iron loss, reduce the magnetostriction coefficient, and reduce the energy consumption and noise of the transformer. Therefore, the insulating coating is an important part of grain-oriented silicon steel. [0003] However, the vast majority of insulating coating solutions currently in use contain chromate. After...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/42C23C22/73
CPCC09D5/084C08K3/22C09D1/00C09D7/67C23C24/10C23C26/00H01B3/08H01B19/02H01F1/18
Inventor 张刚高虎梁军
Owner WUHAN YUANRONG TECH CO LTD