热喷涂 WC-MoB-Co 金属陶瓷涂层的耐腐蚀性能研究

本文采用团聚烧结法制备了 WC-MoB-Co 金属陶瓷喷涂粉末， 使用超音速火焰喷涂技术在 316L 不锈钢基 材上制备了 WC-MoB-Co 涂层； 采用 SEM、 XRD 表征了 WC-MoB-Co 粉末和腐蚀前后涂层的微观形貌及物相组成； 测试了 WC-MoB-Co 涂层耐熔融锌铝腐蚀性能。 研究结果表明， 制备的 WC-MoB-Co 金属陶瓷复合粉末粒度集中、 流动性好、 松装密度高； WC-MoB-Co 涂层结合强度高、 孔隙率低； WC-MoB-Co 涂层具有良好的耐腐蚀性能， 随着腐蚀时间的延长， 涂层中的 WC 颗粒逐渐参与反应。

Corrosion Resistance of Thermal Sprayed WC-MoB-Co Cermet Coatings

In this paper, WC-MoB-Co cermet spray powders were prepared by agglomeration and sintering method, and WC-MoB-Co coatings were prepared on 316L stainless steel substrates by high-velocity oxygenfuel spraying technology. SEM and XRD were used to characterize the WC-MoB-Co powder and the microscopic morphology and phase composition of the coating before and after corrosion; the corrosion resistance of WCMoB-Co coating to molten zinc and aluminum were tested. The research results showed that the prepared WCMoB-Co cermet composite powder exhibited concentrated particle size, good fluidity and high bulk density. The WC-MoB-Co coating with high bonding strength and low porosity showed good corrosion resistance. With the prolongation of corrosion time, the WC particles in the coating gradually participated in the reaction.