摘要
基于动力用煤在燃烧过程中产生的硫氧化物对电厂锅炉“四管”所造成腐蚀的严峻现状,对新型高铬合金和NiCrFe-Cr3C2 2种电弧喷涂涂层在700 ℃下的高温腐蚀动力学规律进行了研究。并采用配有能谱分析仪的扫描电镜(SEM)以及X射线衍射仪(XRD)等检测设备对腐蚀产物的形貌和相组成等进行了分析。试验结果表明:新型高铬合金涂层具有更低的氧化速度,表现出较优异的抗高温腐蚀性能,其表面生成了连续的Cr2O3保护膜。
Hot corrosion is common phenomenon of the boiler pipes in power plants. It is also the main cause of the equipment damage. The corrosive dynamics rule of new high chromium alloy and NiCrFe-Cr3C2 arc-sprayed coating was studied at 700 ℃. The surface and section after corrosion were analyzed by SEM, EDX and XRD. The testing results showed that the corrosion resistance of new high chromium alloy arc-sprayed coating was excellent, and the Cr2O3 protecting film was formed on the surface of coating.
出处
《中国表面工程》
EI
CAS
CSCD
2003年第1期9-12,共4页
China Surface Engineering
关键词
高温腐蚀
电弧喷涂
腐蚀动力学
腐蚀形貌
corrosion in high emperature
arc spray
the corrosive dynamics curve
surface morphology of coating after corrosion
