What is Electrical steel insulation coating
What is Electrical steel insulation coating
Electrical steel insulation coating is an important material used to improve the electromagnetic properties of electrical steel and reduce eddy current losses. Because of its non-toxic, harmless and environmentally friendly characteristics, the environmental protection insulation coating has gradually become a hot spot in research and application. Here are some details about electrical steel insulation coatings:
1. ** Phosphate insulation environmental protection coating ** : composed of dihydrogen phosphate salt, metal oxide, silica sol, etc., of which aluminum dihydrogen phosphate is an important material to form an insulating layer, with good adhesion and corrosion resistance.
2. ** Silane coupling agent and rare earth passivation agent ** : By adding silane coupling agent and rare earth passivation agent, the corrosion resistance of phosphate insulating environmental protection coating can be improved, where silane interacts with inorganic substances through dehydration condensation model, and rare earth conversion film improves corrosion resistance through cathode prohibition mechanism.
3. ** Coating performance test ** : The microscopic morphology, corrosion resistance, composition and structure of the coating are characterized by a variety of instruments, such as SEM, EDS, XRD, salt spray test, pencil hardness tester, etc., to ensure that the uniformity, adhesion and interlayer resistance of the coating meet the requirements.
4. ** Environmental protection insulation coating ** : There have been successful research and development of non-oriented electrical steel with phosphate insulation environmental protection coating, which has shown good results in improving the corrosion resistance and insulation properties of electrical steel.
5. ** Group standard "Environmentally Friendly Insulation coating of Non-oriented Electrical Steel" ** : The Chinese Society of Metals issued and implemented the first relevant group standards in China, aiming to promote the process of environmental protection of electrical steel coating, and provide the technical characteristics, inspection methods and rules of environmentally friendly insulation coating products.
6. The promotion of environmentally friendly coating ** : The application of environmentally friendly coating on the surface of electrical steel at home and abroad has become increasingly important, the European Union has fully adopted chromium-free environmentally friendly coating, and China is also actively promoting the full application of environmentally friendly coating to reduce environmental pollution and improve product quality.
Through these studies and the development of standards, the environmental protection and safety of electrical steel insulation coatings have been significantly improved, helping to promote the green development of the electrical steel industry.
