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Non-oriented electrical steel chromium-free insulation paint

A technology of oriented electrical steel and insulating coatings, applied in the direction of fireproof coatings, coatings, etc., can solve the problems of lower interlayer resistance, poor corrosion resistance of pure phosphate, and affect product performance, and achieve good interlayer resistance and corrosion resistance Effect

Active Publication Date: 2008-09-03
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

According to the current application status of electrical steel insulating coatings, the coating needs to be cured at high temperature, and electrical steel products need to be annealed at high temperature. The biggest problem is that the interlayer resistance is greatly reduced after high temperature annealing, which seriously affects the performance of related products
The use of phosphate as a film-forming agent for insulating coatings has been reported, but pure phosphate has relatively poor corrosion resistance and is prone to hydrolysis

Method used

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  • Non-oriented electrical steel chromium-free insulation paint
  • Non-oriented electrical steel chromium-free insulation paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix the aqueous solution containing 1 part of aluminum phosphate and 0.1 part of styrene-acrylic mixed emulsion evenly, then add 0.005 parts of ammonium molybdate and paint additives, stir thoroughly, adjust the viscosity to the level required by the customer, and stir for half an hour.

Embodiment 2

[0027] Mix the aqueous solution containing 1 part of magnesium phosphate and 0.5 part of styrene emulsion evenly, then add 0.01 part of sodium molybdate and paint additives, stir thoroughly, adjust the viscosity to the level required by the customer, and stir for half an hour.

Embodiment 3

[0029] Mix the aqueous solution containing 1 part of calcium phosphate and 1 part of polystyrene emulsion evenly, then add 0.015 parts of zinc molybdate and paint additives, stir well, adjust the viscosity to the level required by the customer, and stir for half an hour.

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Abstract

The invention discloses a kind of non oriented electrical steel non chrome insulating coating, comprising metal phosphate, organic resin, molybdenate, wherein the weight ratio of the metal phosphate, organic resin and molybdenate is: 1:0.1-2:0.0005-0.2. The coating does not come off after annealing at 750 degree with good interface resistance and corrosion resistance when the environmental protection is ensured.

Description

technical field [0001] The invention belongs to non-oriented electrical steel insulating coatings, in particular to a chrome-free environment-friendly insulating coating used in non-oriented electrical steel coatings. Background technique [0002] So far, there have been many technologies and coating formulations for forming an insulating layer on electrical steel sheets, mainly including inorganic, organic and semi-inorganic. The earliest coatings were mainly chromates and phosphates to form an inorganic film on electrical steel sheets. Although the inorganic film is excellent in heat resistance, it is poor in water resistance, impact resistance, and adhesion. In order to solve the above problems, a hybrid coating formulation containing two main components of organic and inorganic components - semi-inorganic coating has been gradually developed. This type of formulation makes full use of the good welding performance and heat resistance of the inorganic film and the excelle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D5/18
Inventor 裴陈新孔祥华朱涛张东升沈新玉何业东骆小刚徐金梧董梅胡柯朱文清占云高
Owner MAANSHAN IRON & STEEL CO LTD
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