Electrochemical Hydrogen Permeation Test under Controlled Temperature and Humidity after Outdoor Exposure at Beijing, Chongqing and Okinawa

DOI Web Site Web Site 34 References

Bibliographic Information

Other Title
  • 北京，重慶および沖縄に室外暴露した試験片を用いた温湿度制御下の電気化学的水素透過試験
  • ペキン,ジュウケイ オヨビ オキナワ ニ シツガイ バクロ シタ シケンヘン オ モチイタ オン シツド セイギョ カ ノ デンキ カガクテキ スイソ トウカ シケン

Search this article

Abstract

<p>Electrochemical hydrogen permeation tests were carried out under controlled temperature and humidity using pure Fe sheet specimens outdoor-exposed at Beijing and Chongqing, China and Okinawa, Japan in order to understand the effect of environmental factors on hydrogen uptake behavior. The maximum hydrogen permeation current densities of the exposed specimens were in the order of Beijing > Chongqing >> Okinawa, while the order of the degree of corrosion of the specimens was Okinawa > Chongqing >> Beijing. X-ray fluorescence analysis showed that the surface concentrations of sulfur on the Beijing- and Chongqing-exposed specimens were higher than that of the Okinawa-exposed specimens, whereas chlorine concentrations of the Beijing and Okinawa-exposed specimens were higher than that of the Chongqing-exposed specimen. Nitrate concentrations of Beijing- and Chongqing-exposed specimens evaluated using nitrate test strips were obviously higher than that of the Okinawa-exposed specimens. It is suggested that air pollutants such as SO2 and NO2 and particulate matters containing inorganic acid ions, likely sulfate and nitrate ions, and possibly organic acids contribute to acidification of rust layer leading to the enhanced hydrogen entry.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 103 (2), 93-100, 2017

    The Iron and Steel Institute of Japan

References(34)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top