A kind of chromium-free insulating coating liquid and its preparation method and non-oriented silicon steel plate

An insulating coating and insulating coating technology, applied in the field of silicon steel, can solve the problems of increasing enterprise cost, polluting the environment, endangering human health, etc., and achieving the effects of easy coating, high insulation resistance and hardness, and excellent adhesion resistance

Active Publication Date: 2021-04-20
WUHAN YUANRONG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the discarded steel plates are not properly recycled, it will not only endanger human health but also seriously pollute the environment
If the hexavalent chromium in the coating is recovered, the cost of the enterprise will be greatly increased

Method used

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  • A kind of chromium-free insulating coating liquid and its preparation method and non-oriented silicon steel plate
  • A kind of chromium-free insulating coating liquid and its preparation method and non-oriented silicon steel plate
  • A kind of chromium-free insulating coating liquid and its preparation method and non-oriented silicon steel plate

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preparation example Construction

[0030] The present invention also provides a preparation method of the chromium-free insulating coating liquid, comprising the steps of:

[0031] Add aluminum dihydrogen phosphate solution and water, stir;

[0032] Add antimony fluoride solution and tartaric acid in turn, stir;

[0033] Add magnesium hydroxide and boric acid to make the pH 1-4,

[0034] Add acrylic acid emulsion and ethylene glycol and stir to obtain the chromium-free insulating coating solution.

[0035] The present invention also provides a non-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 solution on the surface of the substrate, specifically The method is: coating the chromium-free insulating coating solution on the non-oriented silicon steel sheet, drying and sintering the coated insulating coating solution at a temperatu...

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Abstract

The invention provides a chrome-free insulating coating liquid, a preparation method thereof and a non-oriented silicon steel plate. The chrome-free insulating coating solution comprises the following components: 300-500 parts by weight of phosphate solution, 8-15 parts by weight of tartaric acid, 8-20 parts by weight of magnesium hydroxide, 15-25 parts by weight of boric acid, and 100-400 parts by weight of acrylic acid emulsion parts, 8-15 parts by weight of ethylene glycol and 1-10 parts by weight of antimony trifluoride. The chromium-free insulating coating of the invention does not contain chromium compounds and toxic substances specified by RoHS, and is a green and environment-friendly insulating coating solution. The chromium-free insulating coating solution of the present invention exhibits excellent adhesion, corrosion resistance, film exudation resistance, excellent adhesion resistance, lubricity, punchability, weldability and other excellent performances when coated on steel plates.

Description

technical field [0001] The invention belongs to the technical field of silicon steel, and in particular relates to a chromium-free insulating coating liquid, a preparation method thereof and a non-oriented silicon steel plate. Background technique [0002] Non-oriented silicon steel is a ferrosilicon alloy with very low carbon content. In the steel plate after deformation and annealing, the grains are distributed in random orientation. The products are usually cold-rolled plates or strips with a nominal thickness of 0.35 and 0.5mm, mainly used in the manufacture of electric motors and generators. In order to reduce the eddy current loss of the electrical steel sheet, it is necessary to apply an insulating coating on the surface of the steel sheet. In addition, when manufacturing motors, household appliances and transformer cores, electrical steel sheets are continuously made into core-shaped blanks, a predetermined number of blanks are stacked together, and the edges of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D5/25C09D5/08C09D7/61C09D7/63B05D7/14
Inventor 张刚高虎梁军
Owner WUHAN YUANRONG TECH CO LTD
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