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Single-component chromium-free environment-friendly non-oriented electrical steel insulated surface treatment agent

A technology for oriented electrical steel and insulating surfaces, used in coatings, anti-corrosion coatings, polyurea/polyurethane coatings, etc., can solve problems such as performance gaps, avoid coating pitting, reduce porosity, and have good film-forming properties Effect

Inactive Publication Date: 2019-10-08
上海优梓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

Therefore, the new chromium-free environmental protection electrical steel surface treatment agent technology is developing rapidly, but there is still a certain gap between the performance and the chromate electrical steel coating solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: The present invention provides a technical solution: a single-component chrome-free, environmentally friendly, non-oriented electrical steel insulating surface treatment agent, the surface treatment agent is composed of the following proportions by weight: 40.0% water-based polyurethane resin, forming Membrane aid 5.0%, inorganic acid salt 3.0%, boric acid 0.6%, acidic corrosion inhibitor 4.0%, magnesium hydroxide 3.5%, organic solvent 1.0%, and the balance is water.

[0049] The preparation method of above-mentioned surface treatment agent, comprises the following steps:

[0050] S1: Degreasing and degreasing, the temperature of the degreasing agent is 30-40°C, and the concentration is 3%;

[0051] S2: After degreasing and degreasing the electrical steel in S1, rinse the electrical steel with deionized water at room temperature to remove the residual liquid, and let it stand and dry for later use;

[0052] S3: The preparation of organic-inorganic composite...

Embodiment 2

[0055] The invention provides a technical solution: a one-component chrome-free, environmentally friendly, non-oriented electrical steel insulation surface treatment agent, the surface treatment agent is composed of the following proportions by weight: 20.0% water-based polyurethane resin, 5.0% film-forming aid %, inorganic acid salt 5.0%, boric acid 0.5%, acid corrosion inhibitor 2.5%, magnesium hydroxide 5.0%, organic solvent 0.5%, and the balance is water.

[0056] The film-forming aid in this embodiment is a mixture of γ-glycidyloxypropyl trimethoxysilane and tetraalkoxy titanate, prepared according to a mass ratio of 1:3.

[0057] The inorganic acid salt in this example is a mixture of fluotitanic acid and ammonium zirconium carbonate, prepared according to a mass ratio of 4:1.

[0058] The acidic corrosion inhibitor in this embodiment is phytic acid.

[0059] The treatment agent of the present embodiment is stable and uniform, and the coating formed by the treatment age...

Embodiment 3

[0061] Embodiment 3: The present invention provides a technical solution: a single-component chrome-free, environmentally friendly, non-oriented electrical steel insulating surface treatment agent, the surface treatment agent is composed of the following proportions by weight: 30.0% water-based polyurethane resin, forming Membrane aid 2.5%, inorganic acid salt 3.0%, boric acid 1.0%, acidic corrosion inhibitor 5.0%, magnesium hydroxide 5.0%, organic solvent 0.8%, and the balance is water.

[0062] The film-forming aid in this embodiment is a mixture of γ-glycidyloxypropyltrimethoxysilane and tetra-n-propyl zirconate, prepared according to a mass ratio of 1:2.

[0063] The inorganic acid salt in this embodiment is a mixture of titanyl sulfate and fluorozirconic acid, prepared according to a mass ratio of 3:1.

[0064] The acidic corrosion inhibitor of the present embodiment is hydroxyethylidene diphosphoric acid

[0065] Embodiment 3 is identical with above-mentioned embodiment...

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Abstract

The invention discloses a single-component chromium-free environment-friendly non-oriented electrical steel insulated surface treatment agent which is composed of, by weight, 20.0-50.0% of waterbornepolyurethane resin, 1.0-10.0% of film forming aid, 1.0-5.0% of inorganic acid salt, 0.1-1.0% of boric acid, 1.0-5.0% of acidic corrosion inhibitor, 0.5-5.0% of magnesium hydroxide, 0.1-1.0% of organicsolvent and the balance of water. The treatment agent is free of chromium, so that the problems of hexavalent chromium heavy metal hidden danger and water pollution are avoided during use and waste liquid treatment; the treatment agent has excellent insulativity, corrosion resistance, adhesiveness, laminated weldability, punching performance, heat resistance and oil resistance, and performance ofa coating formed by the treatment agent is equivalent to that of a chromium-containing coating.

Description

technical field [0001] The invention relates to the related field of surface treatment agents for non-oriented electrical steel, in particular to a one-component, chromium-free, environment-friendly and non-oriented electrical steel insulating surface treatment agent. Background technique [0002] The surface of cold-rolled non-oriented electrical steel needs to be coated with an insulating coating to increase the electrical resistivity of the electrical steel, reduce the eddy current loss between the silicon steel sheets, and improve the corrosion resistance and punching properties of the electrical steel sheet. Traditional non-oriented electrical steel insulation treatment agents are mainly magnesium-based chromate two-component coatings, which must be used up within a short time after mixing, otherwise problems such as blackening and precipitation will occur. During the use of the coating, the hexavalent chromium is converted into a trivalent chromium coating by high-temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/61C09D7/63
CPCC08K2003/2224C09D5/08C09D7/61C09D7/63C09D175/04C08K3/22C08K5/5435C08K5/10C08K3/26C08K13/02
Inventor 万宗跃张泽芳
Owner 上海优梓新材料科技有限公司
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