高温防氧化涂层对Q235钢氧化铁皮形成过程的影响  

The influence of high-temperature anti-oxidation coating on the formation process of iron oxide scale on Q235 steel

作　　者：张嘉元 张贵杰 高华 ZHANG Jiayuan;ZHANG Guijie;GAO Hua(North China University of Technology School of Metallurgy and Energy,Tangshan 063210,Hebei,China;Tangshan Iron and Steel Co.,Ltd.,Tangshan 063210,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]唐山钢铁集团有限公司,河北唐山063210

出　　处：《金属加工（热加工）》2024年第9期78-83,共6页MW Metal Forming

摘　　要：为了探索高温防氧化涂层对氧化铁皮结构的具体影响过程,评估涂层对氧化铁皮形成的影响,深入研究其对钢材的整体氧化行为的影响,对比分析无涂层和有涂层处理后的Q235钢样品在高温条件下的氧化行为。研究结果显示:随时间延长,氧化程度加深。随温度升高,涂层的防护效果下降,在1200℃下所用磷酸盐涂层有明显的失效现象,磷酸盐涂层在高温下失效时,渗入氧化铁皮内部影响了氧化铁皮的致密性。经XRD分析,失效样品中高价态铁占比更高,样品被氧化得更完全。In order to explore the specific impact process of anti oxidation coatings on the structure of iron oxide scales,evaluate the influence of coatings on the formation of iron oxide scales,and conduct in-depth research on their impact on the overall oxidation behavior of steel,a comparative analysis was conducted on the oxidation behavior of Q235 steel samples without coatings and after coating treatment under high temperature conditions.The research results show that as time goes on,the degree of oxidation deepens.As the temperature increases,the protective effect of the coating decreases.The coating used at 1200℃shows obvious failure.When the coating fails at high temperature,infiltration into the iron oxide scale affects its density.According to XRD analysis,the proportion of high valence iron in the failed samples is higher,and the samples are more completely oxidized.

关 键 词：防氧化涂层 氧化铁皮 结构影响 烧损率 

分 类 号：TG174.4[金属学及工艺—金属表面处理]