摘要
针对生物质锅炉受热面存在的高温氯腐蚀问题,在12Cr1MoVG钢片表面制备先驱体陶瓷涂层,模拟生物质锅炉受热面积灰中的碱金属氯盐腐蚀,对涂层试样和钢片试样在400℃、450℃和500℃温度下进行KCl盐膜高温腐蚀实验。实验结果表明:在高温下,KCl对12Cr1MoVG钢的腐蚀速率随温度升高而增加,腐蚀后产物主要为Fe2O3;涂层试样能显著抵抗KCl腐蚀。对涂层进行SEM-EDS分析后发现涂层截面完整致密,与基材结合良好,内部检测不到氯元素,涂层起到了保护基材的作用。将先驱体陶瓷涂层技术应用于某台130 t/h有氯腐蚀问题的水冷振动炉排生物质锅炉,运行半年结果显示涂层仍存在,对受热面起到了明显的防护效果。
The work aims to solve high temperature chlorine corrosion in biomass boiler,a precursor ceramic coating was prepared on the surface of 12 Cr1 MoVG steel sheet.Both uncoated and coated samples were exposed in KCl atmosphere at 400℃,450℃and 500℃to simulate the high temperature corrosion in biomass boiler deposition.Experimental result indicated the corrsion speed of uncoated samples growing with temperature rise and the principal corrosion product was Fe2O3.The coated sample showed significant KCl resistance.SEM-EDS was conducted to characterize the coated samples.The cross section of coating was unbroken and compactly integrated well with metallic substrate.The coating protected the metal from corrosion because chlorine was not detected inside coating.The precursor ceramic coating was tested in the biomass boiler of water cooled oscillating grate with chlorine corrosion.After half a year,the test results showed that coating could separate the substrate and the disposition.The coating efficiently protected the heating surface.
作者
王晓东
邰召山
王杰
朱雁军
吕海洋
刘长瑞
张雁茹
王进卿
WANG Xiao-dong;TAI Zhao-shan;WANG Jie;ZHU Yan-jun;LV Hai-yang;LIU Chang-rui;ZHANG Yan-ru;WANG Jin-qing(National Energy Biological Power Generation Company(Group)co.LTD,Beijing 100052,China;Zhao Shan Technology Company,Beijing 100070,China;School of Metrological Technology and Engineering,China Jiliang University,Hangzhou 310018,China)
出处
《能源工程》
2020年第5期43-47,54,共6页
Energy Engineering
关键词
生物质锅炉
高温氯腐蚀
先驱体陶瓷涂层
应用效果
biomass boiler
high-temperature chlorine corrosion
precursor ceramic coating
application effect
