添加Ce对2101双相不锈钢组织和耐蚀性的影响
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第一作者：龚伟
通讯作者：姜周华
合写作者：张理想,张蕾,王恩刚
发表刊物：国际钢铁研究
卷号：92
DOI码：10.1002/srin.202100003
刊物所在地：德国
摘要：2101 duplex stainless steel with low Ni content is developed to replace austenitic stainless steel in many corrosive environments. Herein, the effects of Ce addition on the microstructure and corrosion resistance of 2101 duplex stainless steel are studied. The electrochemical corrosion behavior of 2101 duplex stainless steel with Ce contents of 0, 0.005, and 0.020 wt% is studied in 3.5 wt% NaCl solution and 0.05 mol L-1 H2SO4 + 0.05 mol L-1 KSCN solution at 25℃. The situation is evaluated in 6 wt% FeCl3 solution at 35℃. The results show that with increasing Ce content, the proportion of α phase in 2101 duplex stainless steel decreases, whereas the proportion of γ phase increases. At 0.005 wt% Ce, the two-phase ratio is close to 1:1. Moreover, the partition coefficient (K) of elements gradually approaches 1 with increasing Ce, indicating a more uniform element distribution between the two phases. The electrochemical experiments in simulated seawater and acidic environments show that Ce addition gradually increases the corrosion potential and pitting resistance, leading to the formation of more stable passivation film.
项目来源：国家自然科学基金重点项目
关键字：duplex stainless steels, microstructures, pitting corrosion, rare earths
论文类型：SCI JCR Q2
学科门类：工学
文献类型：JCR 二区
一级学科：冶金工程
页面范围：1-9
ISSN号：1611-3683
是否译文：否