Influence of Heat Treatment on Corrosion Resistance of High-Velocity Oxygen-Fuel Sprayed WC-17Co Coatings on 42CrMo Steel

被引：0
作者：
Wan-chang Sun
Pei Zhang
Feng Zhang
Chu-xu Dong
Ju-mei Zhang
Hui Cai
机构：
[1] Xi’an University of Science and Technology,College of Materials Science and Engineering
来源：
Journal of Materials Engineering and Performance | 2015年 / 24卷
关键词：
corrosion resistance; heat treatment; HVOF spraying coating; WC-Co;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The influence of heat treatment from 500 to 1100 °C on the 5 wt.% H2SO4 solution-induced corrosion resistance of high-velocity oxygen-fuel sprayed WC-17Co coatings on 42CrMo steel was investigated, by using x-ray diffractometer (XRD), scanning electron microscopy (SEM)-energy-dispersive spectrometer (EDS), and polarization curve methods. XRD analysis showed decrease in W2C phase intensity with recrystallization of amorphous Co and generation of new Co3W3C and Co6W6C phases with heat treatment. Porosity distribution did not follow a particular pattern; it initially increased and then decreased with increasing temperature. Corrosion resistance sequence of the as-sprayed and heat-treated coatings in 5 wt.% H2SO4 solution was C-5 > C-9 > C-A > C-7 > C-11. Furthermore, microstructure and phase structure of heat-treated coatings revealed the formation of different discontinuous plate-like oxide films on the surface of the heat-treated coatings which indicated the vital effect of binder structure on the corrosion resistance.
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页码：3218 / 3227
页数：9
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共 94 条
[11]  
Agrawal RD(2014)Effect of Spray Parameters on the Corrosion Behavior of HVOF Sprayed WC-Co-Cr Coatings Surf. Coat. Technol. 258 38-48
[12]  
Ding ZX(2015)Characterization of the W Int. J. Refract. Met. Hard Mater. 48 167-178
[13]  
Wan WC(2015)C Phase Formed During the High Velocity Oxygen Fuel Spraying of a WC-12Co Powder Surf. Coat. Technol. 264 175-186
[14]  
Zhao H(2015)Effects of the Dispersion Time on the Microstructure and Wear Resistance of WC/Co-CNTs HVOF Sprayed Coatings Surf. Coat. Technol. 262 123-133
[15]  
Liu J(2014)Effects of VC Additions on the Mechanical Properties of Bimodal WC-Co HVOF Thermal Sprayed Coatings Measured by Nanoindentation Opt. Laser Technol. 56 202-206
[16]  
Zhang TM(2012)Microstructural Characterization of HVOF/Plasma Thermal Spray of Micro/Nano WC-12%Co Powders Rare Met. Mater. Eng. 41 2005-2009
[17]  
Guilemany JM(2013)Protection of Carbon Steel Against Molten Aluminum Attack and High Temperature Corrosion Using High Velocity Oxygen-Fuel WC-Co Coatings Matéria 18 10-18
[18]  
Fernández J(2006)Surface Modification of Air Plasma Spraying WC-12% Co Cermet Coating by Laser Melting Technique J. Mater. Process. Technol. 174 305-311
[19]  
Delgado J(2010)Microstructure and Phase Analysis of WC-12Co Coatings Sprayed on Ti Surf. Eng. 26 407-412
[20]  
Benedetti AV(2009)Al J. Electrochem. Soc. 157 D154-D158
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