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Cleaning agent for surface coating films of non-oriented electrical steels and cleaning method

A technology of oriented electrical steel and surface coating, which is applied in the field of special material cleaning to achieve the effect of easy operation

Active Publication Date: 2014-06-04
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in order to detect the carbon content in the finished electrical steel product and other research purposes, it is necessary to clean off the environmental protection coating film on its surface. At present, there is no preparation and method for cleaning the chromium-free environmental protection coating film on the surface of electrical steel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Sodium hexametaphosphate 5%

[0027] Sodium Carbonate 10%

[0028] Sodium polyphosphate 13%

[0029] Caustic soda 20%

[0030] Polyoxyethylene Octylphenol Ether 2%

[0031] Tributyl Phosphate 0.2%

[0032] The rest is water.

[0033] According to the formula of the above weight percentage, stir evenly to obtain the cleaning preparation.

[0034] Pour the prepared cleaning agent into the cleaning tank, heat it to 80°C, put the electrical steel sheet coated with the coating film to be cleaned vertically into the cleaning agent, take it out after soaking for 35s, and quickly clean the electrical steel sheet under running water. Rinse the surface of the sheet. While rinsing, it can assist in wiping the surface. The coating film will fall off completely. In order to avoid rusting on the surface of the electrical steel with the coating film removed, the sample sheet with the peeled coating film should be placed in a container immediately. In the alcohol tray, dry it imm...

Embodiment 2

[0036] Sodium hexametaphosphate 3%

[0037] Sodium carbonate 7%

[0038] Sodium polyphosphate 10%

[0039] Caustic soda 15%

[0040] Polyoxyethylene Octylphenol Ether 1%

[0041] Tributyl Phosphate 0.1%

[0042] The rest is water.

[0043] The ingredients are formulated according to the above weight percentages, and the cleaning preparation is obtained by stirring evenly.

[0044] Pour the prepared cleaning agent into the cleaning tank, heat it to 90°C, put the coated electrical steel sheet to be cleaned vertically into the cleaning agent, take it out after soaking for 40s, and quickly clean the electrical steel sheet under running water. Rinse the surface of the sheet. While rinsing, it can assist in wiping the surface. The coating film will fall off completely. In order to avoid rusting on the surface of the electrical steel with the coating film removed, the sample sheet with the peeled coating film should be placed in a container immediately. In the alcohol tray, dry...

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PUM

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Abstract

The invention relates to a cleaning agent for surface coating films of non-oriented electrical steels, consisting of the following components by weight percentage: 2-10% of sodium hexametaphosphate, 3-15% of sodium carbonate, 8-20% of sodium polyphosphate; 10-30% of caustic soda, 1-3% of poly-oxylethyleneallkylphenyl ether, 0.1-0.3% of tributyl phosphate and the balance of water. Prepared preparation is poured into a cleaning groove and heated to 80-90 DEGC; electrical steel pieces with the coating films to be cleaned are vertically put into the cleaning agent, dipped for 30-50 s and then taken out; the surfaces of the electrical steel pieces are rapidly cleaned in the water and wiped by assisting while cleaning; and the coating films fall off fully. The cleaning agent is operated simply and high-efficiency and has no corrosion for the surfaces of the electrical steels so as to achieve the purpose of fully cleaning the surface coating films.

Description

technical field [0001] The invention relates to a cleaning agent for an environmentally friendly coating film on the surface of non-oriented electrical steel, belonging to the field of cleaning special materials. Background technique [0002] Cold-rolled non-oriented electrical steel is mainly used in various types of motors. When the motor operates at a certain frequency, the alternating magnetic field causes eddy current loss. In order to reduce the generation of eddy current loss, it is necessary to apply an insulating coating on the surface of the steel plate. The insulating coating not only has good insulation, adhesion, and corrosion resistance, but also needs it to meet the needs of motor users for processing and motor operation. There are some other properties such as punching, welding, adhesion, heat resistance, oil resistance and so on. [0003] The insulating coating is generally a semi-inorganic coating containing chromium. Such as WISCO's T4, T5 coating, Baost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/19
Inventor 胡志强光红兵苗晓赵建伟顾祥宇刘建红唐卫中常亚飞
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD