SUS321不锈钢表面Cr/CrN涂层的制备与抗氧化及耐腐蚀研究
Research on Preparation,Oxidation Resistance and Corrosion Resistance of Cr/CrN Coating on SUS321 Stainless Steel Surface
张林嘉 1卢婷 2李恒 2李亚茹 3许海龙3
作者信息
- 1. 海军装备广州局贵阳军代室,贵州 贵阳 550018
- 2. 中国航发四川燃气涡轮研究院,四川 成都 610500
- 3. 西北工业大学,陕西 西安 710072
- 折叠
摘要
采用磁控溅射技术,在SUS321 不锈钢表面制备Cr/CrN涂层,利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)及分析天平等分别表征样品高温氧化及酸性盐雾腐蚀实验后的微结构及增重.结果表明,当磁控溅射气体分压比为PAr/PN2=3∶1 的涂层样品抗氧化性能及耐腐蚀性能最佳.在此基础上通过循环沉积制备了多层Cr/CrN涂层,6 周期涂层样品在600℃氧化200 h后的单位面积增重为3.599 g/m2,表面氧化膜致密,没有出现剥落现象;6 周期的涂层样品在酸性盐雾环境中能够保持480 h表面无变化,在放置500 h后边缘部位才开始出现轻微锈迹.固定磁控溅射气体分压比为PAr/PN2=3∶1 时,制备的6周期Cr/CrN多层膜涂层具有最佳的抗氧化及耐酸性盐雾腐蚀性能.
Abstract
Cr/CrN coatings were prepared on the surface of SUS321 stainless steel using magnetron sputtering technology.The microstructure and weight gain of samples after high-temperature oxidation and acidic salt spray corrosion experiments were characterized using scanning electron microscopy(SEM),X-ray diffraction(XRD)and analytical balance.The results show that the sample with a magnetron sputtering pressure ratio of PAr/PN2=3∶1 exhibits the best antioxidation and corrosion resistance.Based on this,multi-layer Cr/CrN coatings are prepared through cyclic deposition.The sample with 6-cycle coatings has a weight gain of 3.599 g/m2 after oxidation at 600℃for 200 h,with a dense surface oxide film and no peeling observed.In an acidic salt spray environment,the sample with a 6-cycle coating has no obvious oxidation for 480 h,and generates slight rust only at the edge after oxidation for 500 h.The 6-cycle Cr/CrN multilayer film coating prepared with a fixed magne tron sputtering pressure ratio of PAr/PN2=3∶1 exhibits the best antioxidation and resistance to acidic salt spray corrosion.
关键词
SUS321不锈钢/磁控溅射/Cr/CrN涂层/抗氧化性能/耐腐蚀性能Key words
SUS321 stainless steel/magnetron sputtering/Cr/CrN coating/antioxidation performance/corrosion resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据