Steel Science Portal

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. 57 (2008), No. 12

  • A Significance of Defense for ···

    Hachiro Imai

    pp. 513-513

    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.57.513

  • Role of Chemistry in Analysis on the Leakage Incident of Sodium from the Fast Breeder Reactor of “Monjyu”

    Masao Takahashi

    pp. 514-523

    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.57.514

    Abstract

    The chemical reactions of Na-Fe-O2-H2O system and their equilibrium constants (600∼1200 K) were expressed in terms of standard equilibrium O2 pressure P0 and standard potential E0. The results were graphically illustrated on the equilibrium daiagrams of log P(O2)(O2 partial pressure) vs. log(Na2O)(basicity) or E(potential) vs. log(O2−)(basicity). These daiagrams visually and comprehensively show the equilibrium relations in the reactions among molten Na with O2, H2O and Fe with their reaction products and give a useful information for analysis of the leakage incident of sodium from the fast breeder reactor of “Monjyu”.

  • Corrosion Behavior of Stainless Steel in Nitric Acid Solutions Including Neptunium

    Takafumi Motooka, Masahiro Yamamoto

    pp. 536-541

    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.57.536

    Abstract

    In order to investigate a corrosion behavior of stainless steel in the typical nuclear fuel reprocessing plant, corrosion tests using nitric acid solution with neptunium were conducted under atmospheric and the reduced pressure conditions in the laboratory where radioactive substance could be handled. An ultra low carbon type of SUS304ULC stainless steel was used. Obtained results were as follows: Under the reduced pressure condition, corrosion of the stainless steel was accelerated in the nitric acid solution with neptunium than in pure nitric acid solution. Under an atmospheric condition, the corrosion rate of the stainless steel increased with increase of neptunium content. The higher solution temperature enhanced the corrosion rate of the stainless steel in the nitric acid solution with neptunium. Thermodynamic data showed that Np(V) oxidized to Np(VI) by concentrated and elevated nitric acid solution. The corrosion potential of the stainless steel shifted to nobler direction in the nitric acid solution with neptunium. It is estimated that the electrochemical reaction of Np(VI)/Np(V) is reversible and the rate constant of the reaction has great values. And it is considered that the dominance of Np(VI) in nitric acid solution accelerated the corrosion rate of the stainless steel in the solutions with neptunium.

  • Development of Monitoring Method for Coating Condition inside Ballast Tank using Numerical Inverse Analysis

    Atsushi Nakayama, Kenji Amaya, Norio Yamamoto, Koji Terai

    pp. 542-547

    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.57.542

    Abstract

    We developed the quantitative monitoring method for coating condition inside a ballast tank. We proposed the coating condition is evaluated with the surface resistance. We developed the identification method to obtain the whole surface resistance from the differential potential induced by the impressed current from an optional anode inside a tank. We introduced differential potential measurement and inverse analysis to obtain the surface resistance representing the coating condition. The potential measurement and quantitative evaluation were conducted in the actual ship. The verification was performed and there was the good agreement between the proposed method and the preliminary visual inspection.
  • © 2008 Japan Society of Corrosion Engineering

Article Access Ranking

14 Jul. (Last 30 Days)

  1. Production and Technology of Iron and Steel in Japan during 2019 ISIJ International Vol.60(2020), No.6
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Numerical Simulation of Fluid Flow and Solidification in a Vertical Round Bloom Caster Using a Four-port SEN with Mold and Strand Electromagnetic Stirring ISIJ International Advance Publication
  4. Scheduling in Continuous Steelmaking Casting: A Systematic Review ISIJ International Vol.60(2020), No.6
  5. Numerical Simulation for the Influence of EMS Position on Fluid Flow and Inclusion Removal in a Slab Continuous Casting Mold ISIJ International Vol.60(2020), No.6
  6. From Iron Ore to Crude Steel: Mass Flows Associated with Lump, Pellet, Sinter and Scrap Iron Inputs ISIJ International Vol.60(2020), No.6
  7. Taguchi Orthogonal Test on Granule Properties and Porosity Distribution in Sintering Bed using High-resolution X-ray Computed Tomography ISIJ International Vol.60(2020), No.6
  8. Experimental Evaluation of Texture Change during Grain Growth in Electrical Steel Sheets and Its Prediction by Phase Field Simulation Tetsu-to-Hagané Vol.106(2020), No.7
  9. Tension Leveling Using Finite Element Analysis with Different Constitutive Relations ISIJ International Vol.60(2020), No.6
  10. Deoxidation of Electroslag Remelting (ESR) – A Review ISIJ International Vol.60(2020), No.6

Search Phrase Ranking

14 Jul. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. cao sio2 viscosity
  5. 17-7 ph
  6. hole expansion ratio
  7. big data
  8. cao
  9. cold formed bainitic steel
  10. digitalization