Environmental-protection oriented silicon steel insulation layer
A technology of oriented silicon steel and insulating coatings, applied in coatings, epoxy resin coatings, etc., can solve the problems of moisture absorption and stickiness of phosphate coatings, chromium poisoning, etc., and achieve the effect of avoiding moisture absorption and stickiness
Active Publication Date: 2009-07-01
BAOSHAN IRON & STEEL CO LTD
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[0022] The examples in Table 1 use alkali metal titanates.
[0023] Table 1
[0024]
[0025] Note: In the above examples, the coated boards did not absorb moisture in a humid environment.
[0026] Table 2 gives examples of alkaline earth metal titanates.
[0027] Table 2
[0028]
[0029] Note: In the above examples, the coated boards did not absorb moisture in a humid environment.
[0030] Table 3 gives examples of other titanates
[0031] table 3
[0032]
[0033] Note: In the above examples, the coated boards did not absorb moisture in a humid environment.
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Abstract
Inorganic titanate aqueous suspension, there are metatitanate, M(II)TiO3, orthotitanate M(II)2TiO4 and double titanate M(I)2Ti2O5, wherein M is a metal, such as potassium, lithium, Sodium; there are also alkaline earth metals, such as barium, strontium, magnesium, calcium, and zinc, iron and aluminum; which account for 17.2-28.2% of the total coating volume; boric acid, which accounts for 0.17-13.9% of the total coating volume; epoxy The copolymer formed by the polymerization of ethane and propylene oxide, the dosage accounts for 0.012-0.115% of the whole coating; fillers, such as silica, alumina, mica, etc. The dosage accounts for 0-20% of the whole coating; the rest is water. The oriented silicon steel products produced by the environmental-friendly coating of the present invention do not contain chromium elements that are harmful to the environment and the human body. The products are environmentally-friendly products that can be exported to countries and regions such as the European Union, and can be applied to safety-related products such as children's toys. Products with higher requirements go up. And this coating does not have the problem of moisture absorption and stickiness.
Description
technical field [0001] The invention relates to an insulating coating for oriented silicon steel, in particular to an environment-friendly insulating coating. Background technique [0002] There is an insulating coating on the surface of grain-oriented silicon steel. Its function is to provide surface insulation and apply tensile stress to the steel plate to improve magnetic properties. [0003] Most of the insulating coatings now contain chromium. For example, in 1973, the insulating coating of Kawasaki Iron and Steel Co., Ltd. in Japan contained chromic acid to improve interlayer resistance and moisture absorption resistance. [0004] Japanese Laid-Open Patent Publication No. 48-39338 discloses an insulating coating capable of applying stress to steel plates, wherein 0.2 to 4.5% chromic acid is added to improve the wettability of the coating solution and to stabilize the free phosphoric acid in the phosphate. [0005] Chromic acid is a substance harmful to the environment...
Claims
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IPC IPC(8): C09D163/00C09D5/25
Inventor 黄昌国路林林沈侃毅
Owner BAOSHAN IRON & STEEL CO LTD