...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Corrosion behavior and mechanism of Cr-Mo alloyed steel: Role of ferrite/bainite duplex microstructure
【24h】

Corrosion behavior and mechanism of Cr-Mo alloyed steel: Role of ferrite/bainite duplex microstructure

机译：CR-MO合金钢的腐蚀行为和机理：铁氧体/贝氏体双面微观结构的作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study presents a systematic investigation of the corrosion behavior and corrosion mechanism of a novel ultralow-carbon Cr-Mo alloyed ferrite/bainite duplex steel rebar. Electrochemical tests revealed the studied steel rebar to have satisfactory corrosion resistance in an NaCl medium, similar to 430 stainless steel and better than 403 stainless steel. The formation of a Cr-dominated bilayer-structured oxidation passive film endows the steel with excellent passivity. During long-term exposure, the Cr-Mo alloyed steel presented no tendency of pitting corrosion. Meanwhile, the formation of a Cr-Mo enriched rust layer inhibited penetration of the corrosive medium, efficiently delaying corrosion propagation in the steel matrix. Given its excellent anticorrosion performance, this novel alloyed steel rebar has great application potential in marine concrete structures. Electron probe microanalyzer, transmission electron microscope, and electron backscattered diffraction analysis of the rebar matrix revealed the bainite phase to have lower Cr-Mo content but more crystal defects than the ferrite phase, leading to the lower potential and higher corrosion tendency of the bainite phase. Microgalvanic corrosion between the bainite phase (anode) and ferrite phase (cathode) caused prior breakdown of the passive film on the bainite phase, stimulating corrosion initiation of this Cr-Mo alloyed duplex steel. (C) 2019 Elsevier B.V. All rights reserved.
机译：本研究提出了一种系统研究了新型超级碳CR-MO合金铁氧体/贝氏体双工钢钢筋的腐蚀行为和腐蚀机理。电化学试验揭示了研究的钢筋在NaCl培养基中具有令人满意的耐腐蚀性，类似于430不锈钢，优于403不锈钢。 CR-主导的双层结构氧化无源膜的形成赋予钢具有优异的纵向。在长期曝光期间，CR-MO合金钢呈现蚀腐蚀的趋势。同时，形成Cr-Mo富集的生锈层抑制腐蚀性介质的渗透，有效地延迟钢基质中的腐蚀繁殖。鉴于其优良的防腐性能，这部新颖的合金钢钢筋在海洋混凝土结构中具有很大的应用潜力。电子探针微分析仪，透射电子显微镜和电子背散射衍射分析的钢筋矩阵揭示了贝氏体相的Cr-Mo含量，但比铁氧体相更多的晶体缺陷，导致贝氏体相的较低潜力和更高的腐蚀趋势。贝氏体相（阳极）和铁素体相（阴极）之间的微血陀螺腐蚀引起的贝氏体相对被动膜的击穿，刺激该CR-MO合金双链钢的腐蚀引发。 （c）2019 Elsevier B.v.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号