Abstract This work reports a morphological, mechanical, and corrosion resistance characterization of WC-12Co and WC-25Co coatings deposited by cold gas spray (CGS) onto AA 7075-T6 alloy. Cross-sectional images of the coatings revealed dense structures with low porosities. The coating thicknesses were 65 μm for WC-12Co and 118 μm for WC-25Co. XRD analysis showed that no fragile phases were formed in the coatings. SEM images and electrochemical results obtained after 700 h exposure to NaCl solution showed that WC-25Co exhibited better corrosion resistance performance. The WC-12Co and WC-25Co coatings withstood 1000 and 3000 h of salt fog spray test, respectively.

中文翻译：

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通过冷气喷涂沉积在 AA 7075-T6 上的 WC-Co 涂层的腐蚀行为

摘要 这项工作报告了通过冷气喷涂 (CGS) 沉积在 AA 7075-T6 合金上的 WC-12Co 和 WC-25Co 涂层的形态、机械和耐腐蚀性特征。涂层的横截面图像显示具有低孔隙率的致密结构。WC-12Co 的涂层厚度为 65 μm，WC-25Co 的涂层厚度为 118 μm。XRD分析表明涂层中没有形成脆性相。暴露于 NaCl 溶液 700 h 后获得的 SEM 图像和电化学结果表明 WC-25Co 表现出更好的耐腐蚀性能。WC-12Co 和 WC-25Co 涂层分别经受了 1000 和 3000 小时的盐雾喷雾试验。