超高强度不锈钢不同海域的海洋腐蚀规律研究  

Marine Corrosion Behavior of Ultra-high Strength Stainless Steel in Different Marine Regions

作　　者：王晓辉[1] 刘振宝[1] 梁剑雄[1] 陈佳豪 杨志勇[1] 赵文宇 田帅 WANG Xiaohui;LIU Zhenbao;LIANG Jianxiong;CHEN Jiahao;YANG Zhiyong;ZHAO Wenyu;TIAN Shuai(Special Steel Research Institute,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;Yantai Research Institute of Harbin Engineering University,Shandong Yantai 264000,China)

机构地区：[1]钢铁研究总院有限公司特殊钢研究院,北京100081 [2]哈尔滨工程大学烟台研究院,山东烟台264000

出　　处：《装备环境工程》2024年第12期103-111,共9页Equipment Environmental Engineering

摘　　要：目的研究Ferrium S53钢和USS122G钢在青岛和三亚2个海域大气和飞溅环境中的自然腐蚀规律。方法采用腐蚀速率、点腐蚀深度、超景深三维显微分析及三维原子探针等方法,对Ferrium S53钢和USS122G钢在上述2个海域大气和飞溅区的腐蚀规律进行研究。结果Ferrium S53钢和USS122G钢在青岛和三亚2个海域的大气和飞溅环境暴露1 a后,2个钢种在青岛海域大气区和飞溅区的年平均腐蚀速率和平均点腐蚀深度均小于三亚海域。USS122G钢在青岛和三亚2个海域的大气和飞溅环境中的年平均腐蚀速率和平均点腐蚀深度均小于Ferrium S53钢。结论短期内,USS122G钢在上述2个海域具有比Ferrium S53钢更好的耐蚀性能。Ferrium S53钢与USS122G钢的主要强化体系不同,前者为M2C型碳化物,后者为Laves金属间化合物,M2C型碳化物中的Cr元素富集更为严重,析出相周围贫Cr区中的Cr元素含量更低,导致Ferrium S53钢的耐腐蚀性能较差。The work aims to study the natural corrosion behavior of Ferrium S53 steel and USS122G steel in the atmospheric and splash zone environments of Qingdao and Sanya marine regions.The corrosion behavior of Ferrium S53 steel and USS122G steel in the atmospheric and splash zone environments of the two marine regions was investigated by methods such as corrosion rate measurement,pitting depth analysis,three-dimensional optical microscopy,and three-dimensional atom probe analysis.After 1 year of exposure in the atmospheric and splash zone environments of Qingdao and Sanya,the annual average corrosion rate and average pitting depth of the both steels in atmospheric and splash zone environments of Qingdao were lower than those in Sanya.The annual average corrosion rate and average pitting depth of USS122G steel were lower than those of Ferrium S53 steel in both atmospheric and splash zone environments of Qingdao and Sanya.In the short term,USS122G steel demonstrates better corrosion resistance than Ferrium S53 steel in the above-mentioned marine regions.The main strengthening mechanisms of Ferrium S53 steel and USS122G steel differ and the former is based on M2C carbides,while the latter is based on Laves phase intermetallic compounds.The Cr element is more heavily concentrated in the M2C carbides,leading to lower Cr content in the depletion zones around the precipitates,resulting in poorer corrosion resistance for Ferrium S53 steel.

关 键 词：超高强度不锈钢 海洋腐蚀 飞溅区 大气环境 点蚀 强化相 

分 类 号：TG172.5[金属学及工艺—金属表面处理]