A New Chromate-Free Insulating Coating on Silicon Steel

Shuang Hong Wang; Yong Feng Long; Shi Lu Zhao; Cheng Qiang An; Ke Ding

doi:10.4028/www.scientific.net/AMR.1004-1005.757

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1004-1005A New Chromate-Free Insulating Coating on Silicon...

A New Chromate-Free Insulating Coating on Silicon Steel

Abstract:

The water-based paint had been examined to prepare a new chromate-free insulating coating on silicon steels. The structure of the insulating coating was characterized by scanning electron microscopy, energy dispersive spectroscopy and infrared spectroscopy. Adhesion, high temperature annealing, and surface insulating resistance were measured. Corrosion resistance was investigated by neutral salt spray test and electrochemical test. Results exhibited that the insulating coating had excellent comprehensive performance. The adhesive level was 5B degree; the high temperature annealing test showed no coating degradation after heat treatment of 2 h at 450 °C in air or at 750 °C in nitrogen; the salt spray test showed the corrosion area was less than 2 % after the 12 h salt spray; when the coating thickness was 1.0-1.2 μm, the surface insulating resistance value was 380-420 Ω/mm².

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Periodical:

Advanced Materials Research (Volumes 1004-1005)

Pages:

757-762

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.757

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Online since:

August 2014

Authors:

Shuang Hong Wang*, Yong Feng Long, Shi Lu Zhao, Cheng Qiang An, Ke Ding

Keywords:

Chromate-Free Coating, Electrical Steel, Insulating Coating, Silicon Steel

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