高速电弧喷涂FePSiBNb纳米结构的涂层结构及电化学行为

doi:10.11896/j.issn.1005-023X.2018.12.007

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Abstract FePSiBNb nanostructure coating was fabricated on Q235 steel substrate by high velocity electrical arc spraying process. The microstructure of coating was characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometer and transmission electron microscope. The electrochemical behaviors in 3.5% (mass fraction) NaCl solution of the coatings were studied by the electrochemical test with different immerse time. The results indicate that the FePSiBNb coating consists of nanoscale α-Fe phase, and the average size of the α-Fe crystalline is about 26 nm.The porosity of the coating is 1.6%. With the immerse time increasing, the potential of the coating is increasing from -826 mV at 1 h to -728 mV at 72 h at first, and then it decreases to -936 mV at 168 h. The corrosive current of the coating has a variation from 7.235 μA/cm² at 1 h to 4.363 μA/cm² at 72 h, and then it increases to 23.05 μA/cm² at 168 h. Compared with the Q235 steel, the coating shows the better corrosion resistance.

Key words： high-speed arc spraying coatings microstructure corrosion resistance

Published: 20 July 2018

CLC number:

TG174.4

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	Articles by authors
	SUN Bo
	CHENG Jiangbo
	LIU Qi
	FENG Yuan
	LIANG Xiubing

Cite this article:

SUN Bo,CHENG Jiangbo,LIU Qi, et al. Structure and Electrochemical Behaviors of FePSiBNb Nanostructured Coatings Prepared by High-speed Arc Spraying[J]. Materials Reports, 2018, 32(12): 1978-1982.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.12.007 OR http://www.mater-rep.com/EN/Y2018/V32/I12/1978

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