热轧碳钢SPHC在天津大气环境中的腐蚀行为  

Corrosion Behavior of Hot Rolled Carbon Steel SPHC in Tianjin Atmospheric Environment

作　　者：董艇舰 李柯 陈亚军[2] 宋肖肖 任凯旭 张超 DONG Tingjian;LI Ke;CHEN Yajun;SONG Xiaoxiao;REN Kaixu;ZHANG Chao(School of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;Sino-European Institute of Aviation Engineering,Civil Aviation University of China,Tianjin 300300,China;China Automotive Technology and Research Center Co.Ltd.,Tianjin 300162,China;Basic Experiment Center of Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学中欧航空工程师学院,天津300300 [3]中国汽车技术研究中心,天津300162 [4]中国民航大学基础实验中心,天津300300

出　　处：《电镀与精饰》2021年第11期7-12,共6页Plating & Finishing

基　　金：中央高校基本科研业务费项目中国民航大学专项资助(3122019112)。

摘　　要：针对热轧钢SPHC的大气腐蚀问题,通过在天津自然环境下开展为期1年的SPHC钢大气暴露试验,依托腐蚀动力学分析、锈层形貌观察、腐蚀产物成分分析、电化学测试等研究了SPHC钢在天津大气环境中的腐蚀行为。结果表明,在暴晒6个月时,SPHC钢的腐蚀速率开始下降,腐蚀产物主要为γ-FeOOH、α-FeOOH和Fe3O4,随着暴露时间的增加γ-FeOOH逐渐向更稳定的腐蚀产物转化,表面较为致密的腐蚀产物含量增多,同时锈层不断增厚形成了双层结构,对基体的保护性逐渐增强,整体耐蚀性不断提高。Aiming at the atmospheric corrosion problem of hot-rolled steel SPHC,a one-year atmospheric exposure test was carried out in Tianjin.Relying on corrosion kinetic analysis,rust layer morphology,corrosion product analysis and electrochemical test,the atmospheric corrosion behavior of SPHC steel in Tianjin was studied.The result shows that the corrosion rate of SPHC steel begins to decrease after 6 months of exposure.The corrosion products are mainlyγ-FeOOH,α-FeOOH and Fe3O4.As the exposure time increases,γ-FeOOH gradually transforms into more stable corrosion products,and the content of denser corrosion products on the surface increases.At the same time,the rust layer continues to thicken and form a double-layer structure,which gradually increases the protection of the substrate and the overall corrosion resistance.

关 键 词：热轧钢 大气腐蚀 试验研究 电化学 

分 类 号：TG172.3[金属学及工艺—金属表面处理]