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首页> 外文期刊>ISIJ international >Effects of Alloying Elements on Hydrogen Entry to Low Alloy Steels under a Cyclic Corrosion Condition
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Effects of Alloying Elements on Hydrogen Entry to Low Alloy Steels under a Cyclic Corrosion Condition

机译：循环腐蚀条件下合金元素对低合金钢氢进入的影响

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摘要

Hydrogen entry in low alloy steels and effects of alloying elements were investigated using a hydrogen permeation technique under a simulated atmospheric corrosion condition and an acidic solution. In the base steel, the hydrogen permeation coefficient sensitively varied depending upon the wetting and drying processes in the cyclic corrosion condition. Additions of Mo, Cu and Ni to the base steel were effective for suppressing hydrogen entry under the cyclic corrosion condition. These elements were also effective in the acidic solution with an initial pH of 3.5. The mechanism of the beneficial effects of these elements was considered to be a change in hydrogen overpotential, which leads to a decrease in hydrogen surface coverage. S was also effective for suppressing hydrogen entry under the cyclic corrosion condition, although it drastically promoted hydrogen entry in the acidic solution. The detrimental effect in the acidic solution was considered to relate the production of H_2S, a catalytic promoter of hydrogen entry, accompanying with the chemical dissolution of soluble sulfide inclusions such as MnS. On the contrary, under the cyclic corrosion condition, dissolution of MnS inclusions would lead to an increase in pH because of the consumption of H~+ ions in the thin water layer on the steel surface, resulting in the suppression of hydrogen entry.
机译：在模拟的大气腐蚀条件和酸性溶液中，使用氢渗透技术研究了低合金钢中的氢进入和合金元素的影响。在基体钢中，氢的渗透系数根据循环腐蚀条件下的润湿和干燥过程而灵敏地变化。在基体钢中添加Mo，Cu和Ni可有效抑制循环腐蚀条件下的氢进入。这些元素在初始pH为3.5的酸性溶液中也有效。这些元素的有益作用机理被认为是氢超电势的变化，这导致氢表面覆盖率的降低。尽管S能大大促进氢在酸性溶液中的进入，但它在循环腐蚀条件下也能有效地抑制氢的进入。认为在酸性溶液中的有害作用与H_2S的产生有关，H_2S是氢进入的催化促进剂，并伴随着可溶性硫化物包裹体（如MnS）的化学溶解。相反，在循环腐蚀条件下，由于钢表面薄水层中的H〜+离子被消耗，MnS夹杂物的溶解会导致pH值升高，从而抑制了氢的进入。

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  • 来源
    《ISIJ international》 |2016年第3期|385-391|共7页
  • 作者

    Tomohiko OMURA; Hitoshi MATSUMOTO; Tatsuya HASEGAWA; Yusuke MIYAKOSHI;

  • 作者单位

    Steel Research Laboratory, Nippon Steel & Sumitomo Metal Corporation, 1-8 Fuso-cho, Amagasaki, 660-0891 Japan;

    Yawata Works, Nippon Steel & Sumitomo Metal Corporation, 1, Konomi-machi, Kokurakita-ku, Kitakyushu, 803-0803 Japan;

    Yawata Works, Nippon Steel & Sumitomo Metal Corporation, 1, Konomi-machi, Kokurakita-ku, Kitakyushu, 803-0803 Japan;

    Yawata Works, Nippon Steel & Sumitomo Metal Corporation, 1, Konomi-machi, Kokurakita-ku, Kitakyushu, 803-0803 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    alloying element; hydrogen permeation; cyclic corrosion;

    机译：合金元素氢渗透循环腐蚀;

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