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Environment-friendly insulating coating liquid as well as preparation method and application thereof

A technology of insulating coating and insulating coating, applied in the direction of coating, anti-corrosion coating, etc., can solve the problems affecting the comprehensive performance of insulating coating, and achieve the effect of excellent lamination coefficient, improved corrosion resistance and good sliding property

Inactive Publication Date: 2020-05-19
上海迪升防腐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above chromium-free environmental protection insulating coating liquid uses other substances instead of toxic chromic anhydride, but some organic substances are added to the coating liquid, which has certain defects in the process of high temperature curing, which affects the comprehensive performance of the insulating coating.

Method used

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  • Environment-friendly insulating coating liquid as well as preparation method and application thereof
  • Environment-friendly insulating coating liquid as well as preparation method and application thereof
  • Environment-friendly insulating coating liquid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Compared with Example 1 and Example 7, the addition of aluminum dihydrogen phosphate is too low, the coating is slightly peeled off, and the corrosion resistance is general. Compared with Example 8, the addition amount of aluminum dihydrogen phosphate is too high, and the local lamination coefficient of the coating is reduced. It can be seen from the examples that the addition of aluminum dihydrogen phosphate is between 30% and 35%, and the coating has excellent properties.

[0055] Comparing Comparative Example 1 with Example 7, due to the low silica sol, the coating density is poor, the corrosion resistance is general, and the part is not smooth. Compared with Example 8 in Comparative Example 2, the silica sol is too high, and the corrosion resistance of the coating is average. It can be seen from the examples that the addition of silica sol is between 20% and 28%, and the coating has excellent properties.

[0056] Compared with Example 3, Comparative Example 3 has ...

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PUM

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Abstract

The invention provides an environment-friendly insulating coating liquid as well as a preparation method and application thereof, wherein the environment-friendly insulating coating liquid is preparedfrom the following raw materials based on the total mass: a phosphate aqueous solution, silica sol, boric acid, a compound dispersion liquid formed by at least one of B and Al, a white carbon black dispersion liquid and water. The environment-friendly insulating coating liquid disclosed by the invention does not contain harmful metal element chromium, so that the pollution to the surrounding environment is small, and the environment-friendly benefit is good; no organic component is contained, coating gaps are reduced after high-temperature curing, and the corrosion resistance is improved; andthe formed insulating coating has excellent adhesiveness, smooth and compact appearance, excellent lamination coefficient, good sliding property, moisture absorption resistance, heat resistance, sheet adhesion resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to an environmentally friendly insulating coating liquid and its preparation method and application. Background technique [0002] Grain-oriented silicon steel is a kind of iron-silicon soft magnetic alloy with (110)[001]Gauss texture, which is mainly used to manufacture iron cores of generators, motors and transformers. In the production process, in order to prevent the bonding between grain-oriented silicon steel sheets during high-temperature annealing, it is necessary to coat MgO coating on the surface of silicon steel. When the temperature reaches 1000°C, MgO will combine with the SiO formed on the surface of the steel strip during the decarburization annealing process. 2 The film reacts to form a magnesium silicate underlayer. However, for medium and large transformers with laminated iron cores, the insulation resistance of the coating is not large enough. In order to furthe...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/25C09D5/08C09D7/61
CPCC09D1/00C09D5/00C09D5/08C09D7/61C09D7/70
Inventor 王晨吴忠阳
Owner 上海迪升防腐新材料科技有限公司
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