Microstructure and corrosion resistance of the brazed WC composite coatings in aerated acidic chloride media

Zhang, Da Quan; Liu, Tao; Joo, Hyung Goun; Gao, Lin; Lee, Kang Yong

doi:10.1016/j.ijrmhm.2012.06.006

Cited by 12 publications

(7 citation statements)

References 18 publications

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“…The Ni base filler alloy are infiltration brazed into the substrate in a vacuum furnace at 1050-1100uC. 13 After brazing, the WC-Ni composite coatings sample was obtained and used for further test.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…12 We have revealed the galvanic corrosion couplings of WC/Ni exist in the brazed WC–Ni composite coatings. 13, The corrosion dissolution mechanism of the brazed WC–Ni composite coatings is still unclear and worthy of further research. In this paper, we investigated the electrochemical potentiodynamic polarization behaviours of the brazed WC–Ni composite coatings in 3%NaCl solution.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and anodic dissolution mechanism of brazed WC–Ni composite coatings

Gao

Zhou

Zhang

et al. 2013

Corrosion Engineering, Science and Technology

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WC-Ni composite coatings were prepared on the mild steel substrates by high temperature sinter brazing. Potentiodynamic polarisation was performed on the coated sample immersed in 3%NaCl solution. Two limited current plateaus appear in the anodic polarisation curve. The first limited current plateau is attributed to the formation of Ni and Cr oxide, while the second corresponding to W oxide. The surface morphology observation and composition analysis after anodic polarisation were investigated by the scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) spectroscopy. The elemental concentrations in the immersion solution were studied with inductively coupled plasma (ICP) spectroscopy. It shows that the selective dissolution of Ni base binder alloy as well as the electrochemical dissolution of WC exists during the anodic polarisation process.

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Section: Experimental Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and anodic dissolution mechanism of brazed WC–Ni composite coatings

Gao

Zhou

Zhang

et al. 2013

Corrosion Engineering, Science and Technology

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“…Lu et al (2003) studied the abrasive wear resistance of vacuum brazed WC-Ni cermet coatings. Erosion and corrosion behaviors of WC-Ni vacuum brazed coatings were studied in our previous research, respectively (Zhang et al, 2012;. Hence, in this research, the principal objective is to examine the combined erosion and corrosion behavior of WC-Ni vacuum brazed coating.…”

Section: Introductionmentioning

confidence: 97%

The combined erosion and corrosion resistance of WC-Ni vacuum brazed coating

Joo

Lee

Luo

et al. 2017

ACMM

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Purpose The purpose of this paper is to investigate the combined erosion and corrosion behavior of WC-Ni vacuum brazed coating. Design/methodology/approach Al2O3 particles and 10 wt% NaCl solution are used to evaluate erosion and corrosion resistance of WC-Ni vacuum brazed coating. Combined test of erosion and corrosion is also conducted. The microstructure of each specimen is characterized by the scanning electron microscopy. The chemical composition was determined by energy-dispersive X-ray spectroscopy. Findings WC-Ni vacuum brazed coating layer is effective protective coating under combined erosion and corrosion environment. The weight loss of coating layer is more reduced as the cumulative test time. Originality/value WC-Ni vacuum brazed coatings are investigated to check characteristic of the combined erosion and corrosion environment. WC-Ni vacuum brazed coatings are kind of diffusion coating that attract attention because of the resistance of superb impact and corrosion in comparison with other coatings. Some previous researches reported the properties of vacuum brazed WC material. Erosion and corrosion behaviors of WC-Ni vacuum brazed coatings were studied in our previous research, respectively. Hence, in this research, the principal objective is to examine the combined erosion and corrosion behavior of WC-Ni vacuum brazed coating.

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“…However, it suffers from issues of interface defects [7] and the high decay heat of tantalum [8,9]. Alternatively, coatings such as tungsten carbide and chromium carbide have been generally adopted to protect the substrate from corrosion under harsh environments in engineering and industrial fields [10][11][12][13][14][15]. In the conventional preparation of cemented carbides, cobalt as binder phase is commonly introduced to densify the particles, which is known as a poorly resistant element to corrosion [16].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Erosion–Corrosion Resistance of Tungsten by Carburizing Using Spark Plasma Sintering Technique

et al. 2020

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The biggest obstacle for the application of tungsten as the target materials in the spallation neutron source is its serious corrosion in the coolant of flowing water. For this reason, W–Cr–C clad tungsten was developed by tungsten carburizing in a spark plasma sintering device, with superior corrosion resistance in the static immersion and electrochemical corrosion test. This work focused on its erosion and corrosion performance in a flowing water system, based upon test parameters simulated under the service conditions. W–Cr–C clad tungsten showed superior corrosion resistance to that of bare tungsten due to the corrosion form changing from the intergranular corrosion of bare tungsten to pitting corrosion of W–Cr–C coating. The corrosion rate of tungsten was as high as tenfold that of the coated sample at 20 °C, and at most fourfold at 60 °C after testing for 360 h. Effects of water velocity and temperature on pitting and intergranular corrosion were investigated in detail and their corresponding corrosion mechanisms were analyzed and discussed.

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Microstructure and corrosion resistance of the brazed WC composite coatings in aerated acidic chloride media

Cited by 12 publications

References 18 publications

Microstructure and anodic dissolution mechanism of brazed WC–Ni composite coatings

Microstructure and anodic dissolution mechanism of brazed WC–Ni composite coatings

The combined erosion and corrosion resistance of WC-Ni vacuum brazed coating

Enhanced Erosion–Corrosion Resistance of Tungsten by Carburizing Using Spark Plasma Sintering Technique

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