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Comparative study on tribocorrosion behavior of hydrogenated/hydrogen-free amorphous carbon coated WC-based cermet in 3.5 wt% NaCl solution
Corrosion Science ( IF 7.4 ) Pub Date : 2023-12-05 , DOI: 10.1016/j.corsci.2023.111738
Yingpeng Zhang , Hao Li , Li Cui , Wei Yang , Guanshui Ma , Rende Chen , Peng Guo , Peiling Ke , Aiying Wang

In this work, the tribocorrosion performance of hydrogenated and hydrogen-free diamond-like carbon (DLC) coated thermal sprayed WC-based cermet/carbide were investigated comparatively. The results showed that, regardless of hydrogen containing, both coatings demonstrated the improvement of anti-tribocorrosion capability of WC-based cermet in 3.5 wt% NaCl solution, by suppressing the corrosion of Ni-based binder phases. Particularly, the hydrogenated DLC coating presented the better tribocorrosion resistance under low load due to the high hardness and excellent corrosion resistance, but it suffered from the catastrophic delamination and protective degradation at heavy load arisen from the high brittleness and large residual stress. In contrast, the hydrogen-free DLC duplex coating exhibited a low COF of ∼0.06 under higher load (10 N) with long time friction (12 h), because of its gradually shearing characteristic. This work provides theoretical basis and design principles for DLC combinations with remarkable corrosion inhibition used in harsh marines.



中文翻译:


氢化/无氢非晶碳涂层WC基金属陶瓷在3.5 wt% NaCl溶液中摩擦腐蚀行为对比研究



在这项工作中,对氢化和无氢类金刚石碳(DLC)涂层热喷涂WC基金属陶瓷/硬质合金的摩擦腐蚀性能进行了比较研究。结果表明,无论含氢量如何,两种涂层都通过抑制镍基粘结相的腐蚀,提高了 WC 基金属陶瓷在 3.5 wt% NaCl 溶液中的耐摩擦腐蚀能力。特别是,氢化DLC涂层由于硬度高和优异的耐腐蚀性,在低载荷下表现出更好的耐摩擦腐蚀性能,但由于高脆性和大的残余应力,在重载荷下会出现灾难性的分层和防护性能退化。相比之下,无氢 DLC 双相涂层由于其逐渐剪切的特性,在较高负载 (10 N) 和长时间摩擦 (12 h) 下表现出 ∼0.06 的低 COF。该工作为恶劣船舶中使用的具有显着缓蚀作用的DLC组合提供了理论基础和设计原则。

更新日期:2023-12-05
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