摘要
C276哈氏合金无论在还原性介质中,还是在氧化性介质中,都表现出较好的耐腐蚀能力,但是C276材质并不具备足够的热稳定性。对某炼油厂催化裂化烟气系统断裂螺栓进行分析,结果表明:C276材质螺栓长期在高温烟气环境中服役,导致螺栓表面发生严重的氧化腐蚀,使得螺栓有效承载截面不断地减小,最终造成螺栓发生断裂。
C276 Hartz alloy shows good corrosion resistance in both reducing medium and oxidizing medium,however it does not have sufficient thermal stability.Through analysis on cracked fixed bolt in flue gas system of catalytic cracking unit in a refinery,it was found that the C276 bolt had long been used under high-temperature flue gas environment,resulting in severe oxidation corrosion on its surface,which continuously reduces effective section bearing capacity until it’s finally broken.
作者
孙亮
侯艳宏
李建
SUN Liang;HOU Yanhong;LI Jian(CNOOC Huizhou Petrochemicals Co.,Ltd.,Huizhou 516086,China;Environmental Corrosion Centre,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)
出处
《石油化工腐蚀与防护》
CAS
2022年第2期48-53,共6页
Corrosion & Protection In Petrochemical Industry
