Effect of porosity sealing treatments on the corrosion resistance of high-velocity oxy-fuel (HVOF)-sprayed Fe-based amorphous metallic coatings

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	Effect of porosity sealing treatments on the corrosion resistance of high-velocity oxy-fuel (HVOF)-sprayed Fe-based amorphous metallic coatings
	Y. Wang; S. L. Jiang; Y. G. Zheng; W. Ke; W. H. Sun; J. Q. Wang
	2011
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	206 期号:6 页码:1307-1318
摘要	High-velocity oxy-fuel-sprayed FeCrMoMnWBCSi amorphous metallic coatings were sealed with sodium orthosilicate (Na(3)SiO(4)), aluminium phosphate (AlPO(4)), and cerium salt sealants. The microstructure of the sealed coatings was characterised by scanning electron microscopy, energy dispersive spectrometer, and X-ray diffraction. Corrosion behaviour was examined using electrochemical methods of potentiodynamic polarisation, cyclic polarisation, electrochemical impedance spectroscopy, and Mott-Schottky tests. The results indicated that the uniform corrosion resistance of the three sealed coatings was enhanced greatly, and the passive current densities were decreased by one order of magnitude after the sealing treatments. The AlPO(4) sealant can penetrate the coatings by no less than 50 mu m and enhance their hardness, which exhibited a more uniform corrosion resistance, fairly good pitting corrosion resistance, and can be applied in long-term corrosive and/or abrasive environments. The cerium salt-sealed coating showed better pitting corrosion resistance but inferior corrosion resistance in the local regions of micro-cracks, which was practically used for temporary corrosion protection. The Na(3)SiO(4)-sealed coating showed better uniform corrosion resistance and inferior pitting corrosion resistance, which can be applied in short-term corrosion environments. The stability of the passive film affected the corrosion behaviour of the sealed coatings. The AlPO(4)-sealed coating performed better as a protective passive film during the long-term immersion test for a lower defect concentration and a more protective passive film. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[wang, y.; jiang, s. l.; zheng, y. g.; ke, w.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. [wang, y.] ne petr univ, dept mat sci & engn, daqing 163318, peoples r china. [sun, w. h.; wang, j. q.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;zheng, yg (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china;ygzheng@imr.ac.cn jqwang@imr.ac.cn
关键词	Metallic Coatings Sealing Treatment Corrosion Amorphous Structures Passivity Matrix Composites Aluminum-alloy Passive Films Protection Behavior Oxide Surface Acid Al Improvement
URL	查看原文
WOS记录号	WOS:000297825600038
引用统计	被引频次：119[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30755
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,S. L. Jiang,Y. G. Zheng,et al. Effect of porosity sealing treatments on the corrosion resistance of high-velocity oxy-fuel (HVOF)-sprayed Fe-based amorphous metallic coatings[J]. Surface & Coatings Technology,2011,206(6):1307-1318.
APA	Y. Wang,S. L. Jiang,Y. G. Zheng,W. Ke,W. H. Sun,&J. Q. Wang.(2011).Effect of porosity sealing treatments on the corrosion resistance of high-velocity oxy-fuel (HVOF)-sprayed Fe-based amorphous metallic coatings.Surface & Coatings Technology,206(6),1307-1318.
MLA	Y. Wang,et al."Effect of porosity sealing treatments on the corrosion resistance of high-velocity oxy-fuel (HVOF)-sprayed Fe-based amorphous metallic coatings".Surface & Coatings Technology 206.6(2011):1307-1318.

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