耐候钢550GNH在模拟海洋大气环境中的腐蚀行为  

CORROSION BEHAVIOR OF WEATHERING STEEL 550GNH IN SIMULATED MARINE ATMOSPHERE

作　　者：张鹏 刘雨薇[3] 梅淑文[4] 顾天真 曹宏伟 王振尧 于程福[4] Zhang Peng;Liu Yuwei;Mei Shuwen;Gu Tianzhen;Cao Hongwei;Wang Zhenyao;Yu Chengfu(HBIS Group Technology Research Institute,Shijiazhuang 050023,Hebei;National Engineering Laboratory of Advanced Coating Technology for Materials,China Iron&Steel Research Institute Group,Beijing,100081;Institute of Metal Research,Chinese Academy of Science,Shenyang 110016,Liaoning;HBIS Group Tangsteel Co.,Tangshan 063000,Hebei)

机构地区：[1]河钢集团钢研总院,河北石家庄050023 [2]钢铁研究总院先进金属材料涂镀国家工程实验室,北京10081 [3]中国科学院金属研究所,辽宁沈阳110016 [4]河钢集团唐钢公司,河北唐山063000

出　　处：《河北冶金》2022年第5期18-23,共6页Hebei Metallurgy

摘　　要：以耐候钢550GNH为研究对象,采用腐蚀失重、宏观形貌、SEM、XRD及电化学阻抗等实验分析方法对其在模拟海洋大气环境中腐蚀行为进行了研究。结果表明:在该大气环境中,随腐蚀时间的延长,550GNH的腐蚀速率先增大,后减小;而极化电阻和电荷转移电阻则先减小,后增大;锈层组成随时间变化不大,主要为β-FeOOH,α-FeOOH,γ-FeOOH和Fe_(3)O_(4);锈层表面局部出现了颗粒状产物。The corrosion behavior of weathering steel 550GNH in simulated marine atmosphere was investigated by weight loss,macro morphology,SEM,XRD and electrochemical impedance spectroscopy.The result showed that the corrosion rate of 550GNH was first increased then decreased as corrosion time prolonged.The polarization resistance and charge transfer resistance decreased first and then increased with the corrosion time extended.The composition of the rust layer changed little with time,mainly containedβ-FeOOH,α-FeOOH,γ-FeOOH and Fe_(3)O_(4).The granular products began to appear locally on the surface of the rust layer.

关 键 词：耐候钢 550GNH 盐雾试验 腐蚀失重 电化学阻抗 

分 类 号：TG174.3[金属学及工艺—金属表面处理]