N80钢表面离心自蔓延合成铝化物陶瓷涂层的组织及耐冲蚀性能  

Microstructure and erosion resistance of aluminide ceramic coating prepared by centrifugal self-propagating high-temperature synthesis

作　　者：李宁 韩凤兰[1] 丁坤飞 杨涛 张磊 LI Ning;HAN Fenglan;DING Kunfei;YANG Tao;ZHANG Lei(School of Material Science&Engineering,North Minzu University,Yinchuan 750021,China;Ningxia Yineng Solid Waste Resource Development Co.,Ltd.,Yinchuan 750499,China;Yinchuan Industrial Technology Research Institute,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]宁夏亿能固体废弃物资源化开发有限公司,宁夏银川750499 [3]银川产业技术研究院,宁夏银川750002

出　　处：《电镀与涂饰》2022年第18期1285-1289,共5页Electroplating & Finishing

基　　金：宁夏回族自治区重点研发计划项目(2020BDE13031)。

摘　　要：针对N80钢管在服役过程中抗冲刷及耐腐蚀性能不足的问题,采用高温自蔓延合成技术(SHS)在N80钢管内壁制备了碳化硅颗粒增强的铝化物陶瓷涂层,分析了涂层的形成机制,研究了N80钢及陶瓷涂层在不同NaCl质量分数的浆料中的冲刷腐蚀行为,采用扫描电镜(SEM)及X射线衍射仪(XRD)分析了涂层和冲刷腐蚀产物的组织结构与相组成。结果表明:陶瓷涂层结构均匀连续,由AlO和少量的SiC颗粒构成。在冲刷腐蚀中,随着浆料中NaCl质量分数的增大,N80钢的腐蚀逐渐加快,并在NaCl质量分数超过6.0%后出现点蚀现象,但陶瓷涂层未发生显著变化,表明该涂层的制备可有效提高N80钢管的抗冲刷腐蚀性能。Aiming at the insufficient erosion and corrosion resistance of N80 steel pipeline in service,a SiC particle reinforced aluminide ceramic coating was prepared on the inner wall of N80 steel pipeline by self-propagating hightemperature synthesis(SHS).The mechanism of coating formation was analyzed.The erosion behaviors of N80 steel and the ceramic coating were studied in slurries with different mass fractions of NaCl.The microstructure and phase constitution of the ceramic coating and erosion products were analyzed by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results showed that the ceramic coating was uniform,continuous,and composed of AlOand a small amount of SiC particles.The corrosion rate of N80 steel was increased with the increasing of NaCl mass fraction in slurry,and pitting corrosion occurred on N80 steel surface when the mass fraction of NaCl was higher than 6.0%,while the corrosion rate of the ceramic coating was slightly changed,indicating that the erosion resistance of N80 steel could be improved effectively by applying the ceramic coating on it.

关 键 词：自蔓延高温合成技术 铝化物 碳化硅 陶瓷涂层 冲刷腐蚀 点蚀 

分 类 号：TG174.44[金属学及工艺—金属表面处理]