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Preparation and properties of inorganic-organic insulation coating for high silicon steel
Pages: 1-5
Year: Issue:  1
Journal: Materials Science and Technology

Keyword:  high silicon steelinsulation coatingenvironment friendly coatingchromium-freeinorganicorganic coating;
Abstract: To reduce eddy current loss between the core lamination of high silicon steel,a kind of chromiumfree environment friendly inorganic-organic insulation coating was prepared by Al( H2PO4)3,St-BA emulsion,glycerol and H2 O. The oxide film of decarburization annealed high silicon sheet,the microstructure and defects of the coating were analyzed by X-ray photoelectron spectroscopy( XPS),scanning electron microscope( SEM)and energy dispersive spectroscopy( EDS). The effects of coating weight on the adhesiveness,hardness and insulating properties were studied. The results show that the phosphate inorganic-organic insulation coating for non-oriented silicon steel can also be suitable for high silicon steel. The uniformity of the insulating coating depends on the surface flatness of high silicon steel,the surface quality of coating roll and the controlling coating speed. The surface roughness and thickness of oxide film of high silicon steel have influences on the adhesiveness of insulating coating. This coating has good adhesion and insulating properties when the coating weight per side is0.8 ~ 1.2 g / m2,the interlamination resistance reaches above 5 Ω·cm2/ piece.
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