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Study of the correlation between pitting corrosion and the component ratio of the dual phase in duplex stainless steel welds

机译：双相不锈钢焊缝中点蚀与双相成分比的相关性研究

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摘要

Three duplex stainless steel weldments were produced by changing the chromium element to study the correlation between the pitting corrosion characteristics and the component ratio of the dual phase. The pit morphologies showed that metastable pits were generated at a lower pitting resistance equivalent number (PREN) phase. The secondary austenite phases seemed to serve as a path for the corrosive environment regardless of the ferrite number (FN). There is some discrepancy between the measured values (pitting potential (E_p) through polarization test) and expected values (sequence ranked by PREN of weaker phase) in 1 mol l~(-1) NaCl solution at 60 ℃.
机译：通过改变铬元素来生产三种双相不锈钢焊件，以研究点蚀特性与双相成分比之间的关系。凹坑形态表明，亚稳凹坑是在较低的抗点蚀当量数（PREN）相下产生的。无论铁素体数（FN）如何，二次奥氏体相似乎都可作为腐蚀环境的路径。在60℃1 mol l〜（-1）NaCl溶液中，测量值（通过极化测试的点蚀电位（E_p））与预期值（以弱相的PREN排序）之间存在一些差异。

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  • 来源
    《Corrosion science》 |2013年第9期|396-407|共12页
  • 作者

    D.H. Kang; H.W. Lee;

  • 作者单位

    Technical Research Center, Hyundai Steel Co. Ltd., Dangjin-Cun, Chungnam 343-823, Republic of Korea;

    Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan 604-714, Republic of Korea;

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  • 正文语种 eng
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  • 关键词

    A. Stainless steel; B. Polarization; B.SEM; C. Pitting corrosion;

    机译：A.不锈钢;B.极化;扫描电镜C.点蚀;

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