304不锈钢表面磁控溅射制备Cr-C涂层的组织与耐高温电化学腐蚀性能  

Microstructure and High-Temperature Electrochemical Corrosion Resistance of Magnetron Sputtered Cr-C Coating on 304 Stainless Steel Surface

作　　者：戴汀 任延杰(指导)[1] 杜晨阳 陈荐 赵宇航 DAI Ting;REN Yanjie;DU Chenyang;CHEN Jian;ZHAO Yuhang(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China;R&D Center of Shenhua Zhuneng Resources Comprehensive Development,Ordos 010300,China)

机构地区：[1]长沙理工大学能源与动力工程学院,长沙410114 [2]神华准能资源综合开发有限公司研发中心,鄂尔多斯010300

出　　处：《机械工程材料》2021年第11期13-17,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51771034);湖南省自然科学基金资助项目(2020JJ4610)。

摘　　要：采用磁控溅射技术在304不锈钢集流体表面制备Cr-C涂层,研究了该涂层的微观形貌、物相组成以及在350℃熔融多硫化钠中的耐电化学腐蚀性能。结果表明:制备得到的Cr-C涂层均匀致密,由Cr3C2,Cr7C3和Cr相组成;在熔融多硫化钠中腐蚀120 h后,Cr-C涂层表面物相包括Cr3C2、Cr7C3、NaCrS2和Cr2S3;Cr-C涂层电阻随着腐蚀时间的延长而增大,腐蚀120 h时可达1454Ω·cm2,表明该涂层能够有效防止熔融多硫化钠扩散至304不锈钢基体表面,从而有效保护基体免受高温熔盐腐蚀。The Cr-C coating was deposited on the surface of 304 stainless steel current collector by magnetron sputtering technique.The microstructure,the phase composition and the electrochemical corrosion resistance in the molten sodium polysulfide at 350℃of the coating were studied.The results show that the prepared Cr-C coating was uniform and dense,and was composed of Cr3C2,Cr7C3 and Cr phases.After corrosion in the molten sodium polysulfide for 120 h,the phases of Cr3C2、Cr7C3,NaCrS2 and Cr2S3 were formed on surface of the Cr-C coating.The Cr-C coating resistance increased with corrosion time and reached 1454Ω·cm2 after corrosion for 120 h,indicating that the coating could effectively inhibit the diffusion of the molten sodium polysulfide to the surface of the 304 stainless steel substrate,thereby preventing the substrate from high temperature molten-salt corrosion effectively.

关 键 词：集流体 Cr-C涂层 电化学腐蚀行为 磁控溅射 

分 类 号：TG174.4[金属学及工艺—金属表面处理]