添加硼酸和钨酸铵对取向硅钢无铬绝缘涂层的影响

doi:10.11896/cldb.20080274

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Abstract The effects of boric acid and ammonium tungstate on the microstructure and properties of chromium-free insulating coatings for grain-oriented silicon steel were studied. It is shown that the wettability of coating solution can be significantly improved by the properly combined additions of boric acid and ammonium tungstate in the chromium-free phosphate coating solution. The coating surface becomes more compact and smooth, and the bonding quality between the insulating coating and the steel substrate is better. The best comprehensive properties can be obtained in the steel coated with the solution containing 2.0wt% boric acid and 0.5wt% ammonium tungstate. The lamination factor is 98.2%, the core loss P_17/50 is 1.155 W·kg^-1, the magnetic induction intensity B₈ is 1.876 T and the interlamination resistance is 19 366 Ω·mm². Furthermore, the improvements of the moisture resistance of coating and the corrosion resistance of grain-oriented silicon steel can also be observed.

Key words： grain-oriented silicon steel chromium-free insulating coating magnetic property moisture resistance corrosion resistance

Published: 25 November 2021 Online: 2021-12-13

CLC number:

TG174

Fund:Joint Research Fund for Industry and University of Fujian Province (2017H6016), the Natural Science Foundation of Fujian Province (2017J01477), the National Natural Science Foundation of China (51871057).

About author: Hao Yangreceived his bachelor's degrees in June 2018 from Fuzhou University Zhicheng College. He is currently pursuing his master's degree at School of Materials Science and Engineering, Fuzhou University under the supervision of Prof. Chen Wang. His research has focused on magnetic materials.
Chen Wang, professor of Fuzhou University, obtained his Ph.D. degree in materials science and engineering from Zhejiang University in 2006. His research inte-rests are rare-earth permanent magnets, high strength and high conductivity copper alloys. He has published more than 50 papers in domestic and international journal, and obtained 10 national invention patents.

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	YANG Hao
	WANG Cheng
	XIAO Xiaobo
	WANG Chen
	CHEN Junfeng
	WANG Bingshu
	ZHANG Weilin
	CUI Xigui

Cite this article:

YANG Hao,WANG Cheng,XIAO Xiaobo, et al. Effects of Boric Acid and Ammonium Tungstate Additions on the Chromium-free Insulating Coating of Grain-oriented Silicon Steel[J]. Materials Reports, 2021, 35(22): 22141-22145.

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http://www.mater-rep.com/EN/10.11896/cldb.20080274 OR http://www.mater-rep.com/EN/Y2021/V35/I22/22141

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