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Effects of Ti addition on microstructure and the associated corrosion behavior of a 22Cr-5Ni duplex stainless steel
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-03-18 , DOI: 10.1002/maco.202012133 Jiantao Zhang 1, 2 , Xiaojun Hu 1 , Kuochih Chou 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-03-18 , DOI: 10.1002/maco.202012133 Jiantao Zhang 1, 2 , Xiaojun Hu 1 , Kuochih Chou 1
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The effects of Ti addition on microstructure and the associated electrochemical properties of 22Cr-5Ni duplex stainless steel were evaluated using X-ray diffraction, X-ray electron probe microanalysis, electron backscattered diffraction, scanning Kelvin probe force microscopy, scanning electron microscopy–energy-dispersive X-ray spectroscopy, electrochemical techniques, and X-ray photoelectron spectroscopy. The results indicated that the addition of a minor amount of Ti refined the grains, improved the pitting potential, and lowered passive current densities remarkably. However, excessive content could cause an imbalance of phase proportion of ferrite and austenite phases and precipitation of the coarse TiN particles. The films on the base and Ti-containing alloy have a similar chemical composition, but the addition of Ti enriched the chromium in the passive film. In particular, the ratio of Cr2O3 and Mo6+ increased, which helped to form a comparatively homogeneous and stable passive film on the duplex stainless steel.
中文翻译：
Ti添加对22Cr-5Ni双相不锈钢显微组织及腐蚀行为的影响
通过 X 射线衍射、X 射线电子探针微量分析、电子背散射衍射、扫描开尔文探针力显微镜、扫描电子显微镜-能量-色散 X 射线光谱、电化学技术和 X 射线光电子能谱。结果表明，微量Ti的加入细化了晶粒，提高了点蚀电位，显着降低了钝化电流密度。然而，含量过高会导致铁素体和奥氏体相的相比例不平衡以及粗大TiN颗粒的析出。基体和含钛合金上的薄膜具有相似的化学成分，但Ti的加入使钝化膜中的铬富集。特别是Cr的比例2 O 3和Mo 6+增加，有助于在双相不锈钢上形成比较均匀稳定的钝化膜。
更新日期：2021-03-18
中文翻译：
Ti添加对22Cr-5Ni双相不锈钢显微组织及腐蚀行为的影响
通过 X 射线衍射、X 射线电子探针微量分析、电子背散射衍射、扫描开尔文探针力显微镜、扫描电子显微镜-能量-色散 X 射线光谱、电化学技术和 X 射线光电子能谱。结果表明，微量Ti的加入细化了晶粒，提高了点蚀电位，显着降低了钝化电流密度。然而，含量过高会导致铁素体和奥氏体相的相比例不平衡以及粗大TiN颗粒的析出。基体和含钛合金上的薄膜具有相似的化学成分，但Ti的加入使钝化膜中的铬富集。特别是Cr的比例2 O 3和Mo 6+增加，有助于在双相不锈钢上形成比较均匀稳定的钝化膜。
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