Environment-friendly insulating coating solution used for non-oriented silicon steel and preparation and application thereof
An insulating coating, oriented silicon steel technology, applied in the direction of metal material coating process, etc., can solve the problems of unsatisfactory coating corrosion resistance, poor substrate wettability, loss of coating characteristics, etc., and achieve good chemical resistance. Drug performance and anti-corrosion performance, solve the effect of moisture absorption and stickiness, and uniform appearance
Active Publication Date: 2012-05-02
上海迪升防腐新材料科技有限公司
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Problems solved by technology
This type of chromium-free coating does meet the requirements of environmental protection, but its disadvantage is that due to the lack of chromic anhydride in the coating, the wettability of the liquid to the substrate becomes poor, causing the coating to The appearance is not good; it also makes the corrosion resistance of the coating unsatisfactory, so only one or several properties can be better satisfied, and satisfactory results cannot be obtained in the comprehensive evaluation
However, after the silicon steel insulating coating is baked and dried at low temperature, there is still a high-temperature sintering process, so the organic matter in this type of non-oriented electrical steel coating will be carbonized at high temperature and lose the characteristics of the original coating.
Method used
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Embodiment 9
[0046] The aluminum dihydrogen phosphate solution used in Example 9 was prepared by reacting 35% by mass of 85% phosphoric acid, 6% aluminum hydroxide and 59% deionized water. The preparation method is as follows: dilute 85% phosphoric acid to a phosphoric acid solution with a mass fraction of 60%, add it to the reaction kettle, heat up to 90°C, add 6% aluminum hydroxide in batches, and stir for 1.5 hours. Keep the temperature constant, and add a corresponding amount of deionized water. After the solution is clarified, cool it down for later use.
[0047] The magnesium dihydrogen phosphate solution used in Example 9 was prepared by reacting 35% by mass of 85% phosphoric acid, 2% magnesium oxide and 63% deionized water. The preparation method is as follows: dilute 85% phosphoric acid to a phosphoric acid solution with a mass fraction of 60%, add it to the reaction kettle, heat up to 40°C, add 2% magnesium oxide in batches and stir for 1.5 hours, and keep the temperature during ...
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Abstract
The invention relates to an environment-friendly insulating coating solution used for non-oriented silicon steel and preparation and application thereof, in particular to a phosphate coating solution and preparation and application thereof, belonging to the technical field of preparation of a silicon steel insulating coating. Based on the total mass of the coating solution, the environment-friendly insulating coating solution used for non-oriented silicon steel comprises the components by the mass percentage of: 20 to 25 percent of aluminum dihydric phosphate solution, 10 to 15 percent of magnesium dihydrogen phosphate solution, 15 to 20 percent of ludox, 2 to 8 percent of boric acid and the balance of deionized water. The insulating coating prepared by using the environment-friendly insulating coating solution used for non-oriented silicon steel not only can guarantee that all the performances such as uniformity, insulating performance, adhesiveness, corrosion resistance, heat resistance, weldability and the like are excellent, but also totally solves the problem in environment protection caused by chromium.
Description
technical field [0001] The invention relates to an environmentally friendly insulating coating solution for non-oriented silicon steel and its preparation and application, in particular to a phosphate coating solution and its preparation and application, and belongs to the technical field of silicon steel insulating coating preparation. Background technique [0002] Non-oriented silicon steel is widely used as the iron core material of motors and transformers because of its uniform thickness, high dimensional accuracy, smooth surface, high filling factor and material magnetic properties. In order to reduce the eddy current loss of silicon steel, ensure that the silicon steel sheet has a high surface resistivity, minimize the power loss between layers, and at the same time protect the silicon steel sheet from erosion and corrosion of various corrosive media, it is necessary to coat the surface of the silicon steel with an insulating layer deal with. Since when manufacturing ...
Claims
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IPC IPC(8): C23C22/07
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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