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Study on hydrogen absorption mechanism into iron by laser speckle microscopy under electrochemical perturbation

Research Project

Project/Area Number 26289268
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Material processing/Microstructural control engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

TADA EIJI  東京工業大学, 物質理工学院, 准教授 (40302260)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Keywords水素脆化 / 遅れ破壊 / 水素吸収反応 / 水素透過電流 / 周波数特性 / 材料加工・処理 / 電気化学プロセス / 環境強度 / 高張力鋼 / 高張力綱
Outline of Final Research Achievements

In this study, hydrogen absorption into iron was investigated by the measurements of hydrogen permeation current responses induced by stimulating hydrogen evolution reaction with potential modulation. Hydrogen absorption efficiency of iron was evaluated as a function of electrode potential by using both DC and AC components of the current responses. The hydrogen absorption efficiency of iron increased with decreasing cathodic polarization. The results suggested that hydrogen absorption kinetics can be considered to be faster than diffusion of hydrogen atoms in iron and to be under a quasi-equilibrium condition.
Measurements of laser speckle patterns of iron surface with hydrogen permeation current was successfully done. The laser speckle patterns changed with the response of hydrogen permeation current, suggesting that surface distribution of hydrogen permeation current can be detected.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report

Research Products

(2 results)

All 2016 2015

All Journal Article Presentation

  • [Journal Article] Evaluation of Hydrogen Absorption into Iron by Alternating Current Responses in an Electrochemical Hydrogen Permeation Cell2016

    • Author(s)
      E. Tada, A. Nishikata
    • Journal Title

      ISIJ Int.

      Volume: 53 Issue: 3 Pages: 424-430

    • DOI

      10.2355/isijinternational.isijint-2015-414

      10.2355/isijinternational.ISIJINT-2015-414

    • NAID

      130005138516

    • ISSN
      0915-1559, 1347-5460
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Hydrogen permeation current responses of iron to potential modulation in an electrochemical hydrogen permeation cell2015

    • Author(s)
      E. Tada, A. Nishikata
    • Organizer
      2015 ISIJ Autumn meeting
    • Place of Presentation
      Kyushu University, Japan
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research

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Published: 2014-04-04   Modified: 2018-03-22  

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