Q235B储罐腐蚀失效分析  

Analysis on Corrosion Failure of Q235B Storage Tank

作　　者：张玉福[1,2,3] 宋文明[1,2,3] 卢雪梅[2,3] 马颖[1] 郝远[1] 杨贵荣[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]甘肃蓝科石化高新装备股份有限公司,甘肃兰州730070 [3]机械工业兰州石油化工设备检测所有限公司,甘肃兰州730070

出　　处：《热加工工艺》2015年第20期238-240,共3页Hot Working Technology

摘　　要：通过化学分析、金相、扫描电镜(SEM)以及EDS分析等手段对储罐底板表面宏观形貌、腐蚀形貌与化学成分进行综合的分析。结果表明,储罐底板的化学成分满足标准要求,主要组织组成相为铁素体+珠光体,腐蚀区域呈溃疡状片状腐蚀,腐蚀产物相对致密,主要成分为氧化物,这主要是由于水中夹杂物和沉积物堆积在储罐底板而引起的腐蚀。The optical microscope, scan electric microscope, chemical analysis method and energy analysis were used to investigate the microstructure, corrosion appearance and chemical composition of oil storage tank. The results show that the chemical composition of storage tank meet the standard requirement. The main phase is ferrite and pearlite. There is ulcer form corrosion in the corrosion area. The corrosion products are compact, and the oxide is the main phase in the corrosion products. The main cause of the corrosion results from the deposit of inclusions on the bottom of baseboard of storage tank.

关 键 词：储罐 晶间腐蚀 局部腐蚀 

分 类 号：TG179[金属学及工艺—金属表面处理]