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首页> 外文期刊>International Journal of Refractory Metals & Hard Materials >Microstructure and corrosion resistance of the brazed WC composite coatings in aerated acidic chloride media
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Microstructure and corrosion resistance of the brazed WC composite coatings in aerated acidic chloride media

机译:充气酸性氯化物介质中钎焊WC复合涂层的组织和耐蚀性

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The paper presents the corrosion behavior of the brazed WC composite coatings by using a combination of weight loss method and electrochemical polarization measurement The brazed WC composite coatings have lower corrosion current densities compared with the 316L stainless steel and show a superior corrosion-resistance property. A further decrease of corrosion current densities is observed for the brazed WC composite coatings with the extending of etching time. The X-ray diffusion (XRD) analysis shows that WC, 7-Ni solid solution and 7-Ni + Ni_3B eutectic solution were presented in the coating surface. The surface morphology observation and composition analysis were conducted by scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) spectroscopy. The insoluble oxidation products were deposited on the corroded coating surface.
机译:结合重量损失法和电化学极化测量方法,给出了钎焊WC复合涂层的腐蚀行为。与316L不锈钢相比,钎焊WC复合涂层的腐蚀电流密度较低,并且具有优异的耐腐蚀性。随着蚀刻时间的延长,观察到钎焊WC复合涂层的腐蚀电流密度进一步降低。 X射线扩散(XRD)分析表明,涂层表面存在WC,7-Ni固溶体和7-Ni + Ni_3B共晶溶液。通过具有能量色散X射线(EDX)光谱的扫描电子显微镜(SEM)进行表面形态观察和组成分析。不溶的氧化产物沉积在腐蚀的涂层表面上。

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