Short-term exposure of low-alloyed steels in Qinghai Salt Lake atmosphere  

作　　者：LI QiaoXia WANG ZhenYao HAN Wei YU GuoCai HAN EnHou 

机构地区：[1]State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 China

出　　处：《Chinese Science Bulletin》2009年第19期3446-3452,共7页

基　　金：Supported by the National Natural Science foundation of China (Grant No. 50499331)

摘　　要：The rusts formed on carbon steel and weathering steel exposed in Qinghai Salt Lake atmosphere for 6 months were characterized by X-ray diffraction (XRD), infrared transmission spectroscopy (IRS), scanning electron microscopy (SEM), electron probe micro analyzer (EPMA) and electrochemical polarization techniques. The two kinds of steels showed the similar corrosion rate, corrosion product composition and electrochemical polarization behavior. Their rusts were mainly composed of β-FeOOH, Fe8(O,OH)16Cl1.3 and a little γ-FeOOH. Cl- played an important role during the corrosion process of low-alloyed steels. The alloyed elements Cr, Ni and Cu in weathering steel were detected in the rusts; however, they showed no remarkable protective ability.The rusts formed on carbon steel and weathering steel exposed in Qinghai Salt Lake atmosphere for 6 months were characterized by X-ray diffraction （XRD）, infrared transmission spectroscopy （iRS）, scanning electron microscopy （SEM）, electron probe micro analyzer （EPMA） and electrochemical po- larization techniques. The two kinds of steels showed the similar corrosion rate, corrosion product composition and electrochemical polarization behavior. Their rusts were mainly composed of β-FeOOH, Fe8（O,OH）16Cl1.3 and a little γ-FeOOH. Cl^- played an important role during the corrosion process of low-alloyed steels. The alloyed elements Cr, Ni and Cu in weathering steel were detected in the rusts; however, they showed no remarkable protective ability.

关 键 词：钢腐蚀 侵蚀 风化 金属腐蚀 

分 类 号：TG17[金属学及工艺—金属表面处理]