Zairyo-to-Kankyo
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 1881-9664
PRINT ISSN: 0917-0480

Zairyo-to-Kankyo Vol. 64 (2015), No. 11

  • Necessity of Corrosion Engineers and Difficulty in Keeping Them Up Social Infrastructure Industry

    pp. 481-482

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3323/jcorr.64.481

  • New Proposals on Evaluation of Environment- Induced Cracking Susceptibility and Mechanism for Metallic Materials

    pp. 483-487

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3323/jcorr.64.483

    In this paper, the criterion on evaluation of EIC (Environment- Induced Cracking) susceptibility for constant load method and a unified EIC mechanism, which are applied to various materials, are newly proposed. The criterion is determined on the basis of the results that the steady state elongation rate becomes the parameter for predicting time to failure and for evaluating the EIC susceptibility. To explain the EIC phenomena obtained experimentally for various materials, the unified EIC mechanism is proposed, by which the roles of three parameters (stress, material and environment) in EIC are more qualitatively explained.
  • Visualization of Microbiologically Influenced Corrosion by an In-situ Investigation Technique for Metal/Microbial Simultaneous Observation

    pp. 492-496

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3323/jcorr.64.492

    The feasibility of a newly developed biofilm observation technique, COCRM: Continuous-Optimizing Confocal Reflection Microscopy, to an investigation technique for metal/microbial simultaneous observation was examined. According to the COCRM investigation technique, the images of biofilm formation on the test specimen surface and the morphology of metal surface was clearly observed simultaneously. Moreover, continuous 15 h fixed-point in-situ metal/microbial simultaneous observation was performed, then the bacterial movements on the metal surface and the change of the metal surface depending on the time was clearly observed. From the results shown above, the feasibility and the possibility of COCRM to MIC research was confirmed.
  • Effect of Tantalum Addition on Crevice Corrosion of Super Duplex Stainless Steels

    pp. 497-500

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3323/jcorr.64.497

    The inclusion control is essential for the development of duplex stainless steels with high local corrosion resistance. In this study, the effect of the inclusion control by Ta addition on the crevice corrosion resistance of the super duplex stainless steels was investigated. The Ta-bearing super duplex stainless steels exhibited the higher crevice corrosion resistance compared to the super duplex stainless steels without Ta. In the super duplex stainless steels without Ta, the dissolution of MnS was observed after the crevice corrosion test, indicating that MnS acts as the initiation of the crevice corrosion. In the Ta-bearing super duplex stainless steels, part of MnS was modified to the (Ta, Mn)-oxysulfide which did not dissolve after the same crevice corrosion test as was conducted for the base alloy without Ta. This demonstrates that (Ta, Mn)-oxysulfide is electrochemically-stable. Thus, Ta addition to the super duplex stainless steel improved the crevice corrosion resistance because of a decrease of MnS which was modified to the electrochemically-stable Ta-containing inclusions.
  • Electrochemical Properties of Oxide Films Formed on Cold Worked Alloy600 and Alloy690 in Simulated PWR Primary Water Environments

    pp. 501-507

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3323/jcorr.64.501

    Passive films formed on Alloy 600 and Alloy 690 in the simulated primary water of pressurized water reactor were characterized by photo electrochemical current response focusing on the influence of the dissolved hydrogen and cold working. Some specimens were also analyzed by X-ray photoelectron spectroscopy using the hard X-ray generated by SPring-8.
    Passive films on both alloys consisted of the oxide layer of p-type semiconductor properties with band gap energy (Eb) of 3.5 eV and the hydroxide layer of n-type semiconductor with Eb of 2.3 eV. However, the content of Ni in the oxide layer which may induce p-type semiconductor property is negligible small. The passive films on Alloy 600 become thinner by dissolved hydrogen, and less protective by cold working. Whereas passive films on Alloy 690, which were more protective than that on Alloy 600, were rarely influenced by cold working and dissolved hydrogen.
  • Chemical State Analysis of Copper Corrosion Products Including Patina by Voltammetry

    pp. 508-513

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3323/jcorr.64.508

    The previously developed voltammetric method using a strongly alkaline electrolyte (6 M KOH + 1 M LiOH) as the supporting electrolyte was applied for simultaneous determination of copper corrosion products, including the oxides and patinas. The reduction peaks of these chemical species could be separated in the electrolyte. When the method was applied to samples with patina, the fast exchange reaction presumably occurred between SO42- or CO32- ions in patinas and OH ions in the electrolyte, so that the reduction peak of patina could be observed at potentials close to that of Cu(OH)2.

Article Access Ranking

18 Jan. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. In situ Observation of Reduction Behavior of Multicomponent Calcium Ferrites by XRD and XAFS Tetsu-to-Hagané Advance Publication
  3. In-Situ Observation Experimental Study on the Agglomeration and Dispersion of Particles at the Interface of High-temperature Melts ISIJ International Advance Publication
  4. Preface to the Diamond Jubilee Issue on “Selected Topics in Iron and Steel and Their Processing toward the New Steel Age” ISIJ International Vol.60(2020), No.12
  5. Development and Prospects of Refining Techniques in Steelmaking Process ISIJ International Vol.60(2020), No.12
  6. Effects of Residual Stress on Hydrogen Embrittlement of a Stretch-Formed Tempered Martensitic Steel Sheet ISIJ International Advance Publication
  7. Improved Hydrogen Embrittlement Resistance of Steel by Shot Peening and Subsequent Low-temperature Annealing ISIJ International Advance Publication
  8. Hydrogen Absorption Behavior and Absorbed Hydrogen Trapping Sites in Rolling Contact Fatigue ISIJ International Advance Publication
  9. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Vol.107(2021), No.1
  10. Determination of the Size Distribution of Nanoparticles Using Asymmetric Flow Field-flow Fractionation (AF4) Tetsu-to-Hagané Vol.107(2021), No.1

Search Phrase Ranking

18 Jan. (Last 30 Days)

  1. blast furnace
  2. 西山記念技術講座
  3. blast furnace permeability
  4. blast furnace productivity
  5. j. f. elliott
  6. blast furnace burden distribution
  7. bottom dross
  8. carbon-containing pellet
  9. cog blast furnace injection
  10. cr2o3 al2o3