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首页> 外文期刊>ISIJ international >Galvanic Corrosion of a Zn/steel Couple in Aqueous NaCI
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Galvanic Corrosion of a Zn/steel Couple in Aqueous NaCI

机译：NaCl水溶液中锌/钢对的电偶腐蚀

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摘要

Galvanic corrosion of a model Zn/steel couple was investigated in aqueous NaCI solutions by measuring open circuit potentials (OCPs), potential and current distributions, and galvanic currents. The OCP transient of the Zn/steel couple was divided into two stages. The first stage consisted of sacrificial dissolution of zinc. At low concentrations of NaCI (0.01 mol/dm3), the cathodic reaction on the couple surface was an oxygen reduction reaction (ORR). With increasing concentrations of NaCI, the cathodic reaction at the steel surface changed from an ORR to the combination of an ORR and hydrogen evolution reaction (HER). In addition, the precipitation morphology of zinc corrosion products differed as a function of NaCI concentration, suggesting that the pH distribution on the couple surface depended on the relationship between the cathodic reactions and the hydrolysis of Zn~(2+). Furthermore, the findings demonstrated that both the ORR and HER were inhibited at the steel underlying precipitated zinc corrosion products. The second stage consisted of steel corrosion. The location of the onset of steel corrosion was related to the pH distribution just prior to the extinction of the galvanic action of zinc.
机译：在NaCl水溶液中，通过测量开路电势（OCP），电势和电流分布以及电电流，研究了模型Zn /钢对的电偶腐蚀。 Zn /钢对的OCP瞬变分为两个阶段。第一阶段包括锌的牺牲性溶解。在低浓度的NaCl（0.01 mol / dm3）下，偶合表面的阴极反应是氧还原反应（ORR）。随着NaCl浓度的增加，钢表面的阴极反应从ORR变为ORR和析氢反应（HER）的组合。此外，锌腐蚀产物的沉淀形态随NaCl浓度的变化而变化，这表明在偶合表面的pH分布取决于阴极反应与Zn〜（2+）水解之间的关系。此外，研究结果表明，在沉淀的锌腐蚀产物下的钢中，ORR和HER均被抑制。第二阶段是钢腐蚀。刚开始锌的电化学作用消失之前，钢腐蚀开始的位置与pH分布有关。

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  • 来源
    《ISIJ international》 |2011年第11期|p.1882-1889|共8页
  • 作者

    Eiji TADA; Hiroyuki KANEKO;

  • 作者单位

    Department of Materials Science and Engineering, Graduate School of Engineering and Resource Science, Akita University, 1-1 Tegata Gakuen-cho, Akita, 010-8502 Japan;

    Akita University, 1- 1 Tegata Gakuen-cho, Akita, 010-8502 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

    zinc; corrosion; galvanic corrosion; sacrificial anode; electrochemical; corrosion product; SVET;

    机译：锌腐蚀;电腐蚀牺牲阳极电化学腐蚀产物;SVET;

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