What are the advantages and challenges of electrical steel insulation coating in practical applications?
What are the advantages and challenges of electrical steel insulation coating in practical applications?
The advantages of electrical steel insulation coating in practical applications are mainly reflected in the following aspects:
1. ** Improve electromagnetic performance ** : Electrical steel insulation coating can improve the interlayer resistance between electrical steel plates, thereby reducing the formation of eddy currents and improving the efficiency of equipment.
2. ** Reduce corrosion loss ** : During the production and transportation of steel plates, the insulating coating can reduce the loss caused by corrosion.
3. ** Environmental protection characteristics ** : Environmentally friendly insulation coating, such as phosphate coating, does not contain harmful substances such as hexavalent chromium, environmentally friendly, in line with the green development needs of modern manufacturing industry.
4. Excellent corrosion resistance ** : phosphate insulation environmental protection coating shows good corrosion resistance, by adding silane coupling agent and rare earth passivation agent, can further improve the corrosion resistance of the coating.
5. ** Improve coating performance ** : New environmental protection electrical steel insulation coating, such as GYI type, has excellent insulation performance and corrosion resistance, small wear to the mold during punching and shearing, and has excellent welding performance.
However, electrical steel insulation coatings also face some challenges in practical applications:
1. ** Environmental protection coating performance gap ** : Compared with chromate coating, there is a gap in the performance of some environmental protection coatings such as heat resistance, which needs to be further improved to achieve a wider range of applications.
2. ** Technical maturity ** : Although the technology of environmental protection coating products for electrical steel is maturing, it has not been fully promoted, partly because of the lack of mandatory policies and standards support.
3. ** Cost issues ** : The price difference between environmentally friendly coatings and chrome-containing coatings may affect the cost of downstream users, which limits the promotion of environmentally friendly coatings to a certain extent.
4. ** Industry consensus ** : coating production, electrical steel production and downstream motor production enterprises need to unified understanding and jointly promote environmentally friendly coating, at present, this consensus has not yet been fully formed.
5. ** Environmental protection standards ** : Although the release of the "Environmentally friendly insulation coating for non-oriented electrical steel" group standard provides a certain specification, it is still necessary to further develop national standards and even mandatory standards to promote the wide application of environmentally friendly coatings.
To sum up, the electrical steel insulation coating has obvious advantages in improving performance and environmental protection, but it still needs to overcome technical, cost and standard challenges in the promotion and application.
