Improvement of corrosion resistance of twinning-induced plasticity steel by hot-dipping aluminum with subsequent thermal diffusion treatment

被引：18
|
作者：
Wang, Wen [1 ,2 ]
Wang, Dan [1 ]
Han, Fusheng [1 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 248卷
基金：
中国国家自然科学基金;
关键词：
TWIP steel; Intermetallic alloys and compounds; Hot-dipping aluminum; Corrosion; INTERMETALLIC PHASES; FE; AL; ALLOY; BEHAVIORS; INTERFACE; EVOLUTION; FE3AL; LAYER; WEAR;
D O I：
10.1016/j.matlet.2019.04.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fe-Al intermetallic layers were formed on the surface of twinning induced plasticity (TWIP) steel by hot-dipping aluminum (HDA) and subsequent thermal diffusion treatment (TDT). It was shown that the coating layer was composed of Al, FeAl3 and Fe2Al5 phases in the hot-dip state while only Fe3Al phase retained after subsequent TDT. It was found that, the corrosion resistance of TWIP steel had been significantly improved with a shift of 224 mV in the E-corr towards anodic direction and the j(corr) reduced from 26.1 mu A/cm(2) to 2.70 mu A/cm(2). Fe-Al intermetallics could lower the corrosion rate because the Al2O3 film formed during stable soak stage was slightly stable due to the higher aluminum content than matrix steel. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：60 / 64
页数：5
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