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WC基热喷涂涂层被广泛应用于各种工业领域以改善组件的机械强度及增强基材的耐磨损耐腐蚀性能。超音速火焰喷涂方法制备的涂层具有涂层密度高、结合强度高等特点,而且在喷涂过程中粒子速度高,粒子的沉积温度相对较低,因而具有较低的＂脱碳＂现象,被人们视为优异的涂层制备技术。通过与不同化学元素合金化的方法制备了多种类型的碳化钨金属陶瓷,以提高其在超音速火焰喷涂方法制备下的耐腐蚀和耐冲刷腐蚀性能,从而满足各种工业应用需求,如石油和天然气工业。本文通过对石油和天然气工业使用环境条件下的模拟,对三种类型的碳化钨硬质合金涂层的电偶序和耐冲刷腐蚀性以及三种不同的密封技术进行了比较。以期获得在特定应用条件下选择最优涂层的相关知识。“,”WC-based thermally sprayed coatings are now widely used in a range of industries to improve the mechanical strength of the components, but also enhance the resistance of the substrate to wear and corrosion. High velocity oxygen fuel thermal spraying has been accepted as a pre-eminent technology to deposit composite coatings with high density, superior bond strengths and relatively low decarburization due to the high particle velocities and relatively low particle temperatures induced in the deposition process. Many types of tungsten carbide/metal cermet coatings have been developed by alloying with different chemical elements, in an attempt to enhance corrosion and even erosion-corrosion resistance of coatings produced by HVOF for industrial applications, for example oil and gas industries. In this paper the galvanic series and the erosion-corrosion behaviour of three types of tungsten carbide coatings and three different sealing technologies in simulated oil and gas industry environments are compared. The ultimate goal is to have an understanding of how optimum choice of coating for a given application can be made for applications in the oil and gas industry.