中国激光, 2020, 47 (10): 1002001, 网络出版: 2020-10-09
激光熔覆制备铁基复合涂层及其耐热耐蚀性能 下载: 756次
Fe-Based Composite Coating Prepared by Laser Cladding and Its Heat and Corrosion Resistance
激光技术 激光熔覆 铁基涂层 耐蚀性 耐高温 laser technique laser cladding Fe-based coating corrosion resistance high-temperature resistance
摘要
为解决现有甲板防滑涂层在高温、高速气流冲蚀等特殊服役条件下的使用及防护问题,采用激光熔覆技术在Q235碳钢表面制备了316L不锈钢耐蚀底层和316L+(ZrO2-8%Y2O3)防滑面层。采用腐蚀电化学测试方法研究涂层在海洋环境中的腐蚀电化学行为,并结合能谱分析及电镜分析等现代分析测试技术,对腐蚀后涂层的微观组织及内部结构进行表征;此外,对比分析了涂层在不同温度(200,400,1000 ℃)下的耐热性能和微观组织。结果表明:该新型铁基复合涂层表现出了较好的耐蚀性,且其耐蚀性比碳钢基体高出了2个数量级;在1000 ℃高温下,涂层表面无明显的剥落、开裂现象,表现出了较好的耐高温性能。
Abstract
To solve the problems of the use and protection of existing deck anti-skid composite coatings under special service conditions such as high-temperature and high-speed air erosion, we prepared a 316L stainless steel corrosion-resistant bottom layer and 316L+(ZrO2-8%Y2O3) anti-skid top layer on a Q235 carbon steel surface using the laser cladding technology. Corrosion electrochemical analysis was carried out to investigate the corrosion electrochemical behavior of the coatings in a marine environment. Furthermore, the microstructure and the internal structure of the coatings were characterized via the modern analytical testing techniques, including X-ray diffraction and scanning electron microscopy. At different temperatures (200 ℃, 400 ℃, and 1000 ℃), the heat resistance and microstructures of the coatings were compared. The results show that the novel Fe-based composite coating exhibits good corrosion resistance, which is two orders of magnitude higher than that of the carbon steel matrix. At the high-temperature condition of 1000 ℃, there was no obvious peeling and cracks on the surface of the Fe-based coating, indicating good high-temperature resistance.
白杨, 王振华, 左娟娟, 姜秀杰, 张学卿. 激光熔覆制备铁基复合涂层及其耐热耐蚀性能[J]. 中国激光, 2020, 47(10): 1002001. Bai Yang, Wang Zhenhua, Zuo Juanjuan, Jiang Xiujie, Zhang Xueqing. Fe-Based Composite Coating Prepared by Laser Cladding and Its Heat and Corrosion Resistance[J]. Chinese Journal of Lasers, 2020, 47(10): 1002001.