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. 66 (2017), No. 8

  • Work about Metallic Corrosion in the Telecommunication Company

    pp. 259-260

    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.66.259

  • Lean Duplex Stainless Steel for Resources Saving Society

    pp. 263-267

    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.66.263

    To improve price stability, stainless steel manufacturers have focused on developing new stainless steel reduced Ni and Mo content, known as rare metal. SUS821L1 and SUS323L, lean duplex stainless steels, were registered in the list of the JIS (Japanese Industrial Standards) in 2015. Corrosion resistance of SUS821L1 and SUS323L are almost equal to that of SUS304 and SUS316L respectively. SUS304 and SUS316L are known as major austenitic stainless steels. In addition, these lean duplex steels have strength equal to that of SUS329J3L or SUS329J4L, known as traditional duplex stainless steels. In this report, characteristic properties of these lean duplex stainless steels with that of SUS304 or SUS316L are described, and some suitable application examples are introduced.
  • Adsorption Behaviors of Adsorptive Anions and an Organic Cation Inhibitor on the Iron Surface in an Acid Solution

    pp. 268-272

    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.66.268

    In the previous studies, adsorption and corrosion inhibition of various anions and an organic cation inhibitor, tetrabutylammonium ion (C4H94N( TBA) on the Fe surface in deaerated 1 M HClO4 have been discussed based on the hard and soft acids and bases principle. The present investigation deals with adsorption behaviors of adsorptive anions, Cl-, I- and SH- and also the anions plus TBA on the Fe surface in 1 M HClO4. The values of the surface coverage, θ for the anions and/or TBA were obtained from the electric double layer capacitances determined by impedance measurements. TBA, which has no unshared electron pair, was adsorbed on the surface by electrostatic interaction. The anions which hold unshared electrons rather chemisorbed than electrostatically adsorbed on the surface by the formation of a stable soft acid and soft base interaction. The highest values of θ for I- and SH-, classified into soft bases, were observed at the potentials near the zero-charge potential, Epzc because the Fe surface at Epzc behaves the softest acid. TBA was adsorbed on the anion-chemisorbed Fe surface by electrostatic interaction, resulting in the high θ values.
  • Effect of the Precipitation of Cu and the Diameter of Cu Precipitates on the Early Stage Corrosion of the Ferritic Stainless Steel

    pp. 273-281

    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.66.273

    It is well known that precipitates on the surface of stainless steels would be initiation points of pitting corrosion. In this study, it was investigated that an effect of Cu precipitates with tens of nm diameter on early stage corrosion and pit initiation of stainless steel. The diameters of Cu precipitates in 18%Cr-3%Cu ferritic stainless steel were controlled by aging condition which are 500-700℃, 1-100h, and the diameters were 0-51nm in grain and 104-125nm at grain boundary. In pitting potential measurement, the Cu precipitates on the surface of specimens were dissolved below pitting potential. It was suggested that the holes formed by the dissolution of the Cu precipitates initiated pits at pitting potential. Pit density of the pitting potential measurement had correlation with number of corrosion point in cyclic corrosion test. The pit densities of specimens with intragranular Cu precipitates whose average diameters were more than 35 nm were larger than that of specimens with less than 35 nm diameter precipitates. Therefore, it was suggested that there is a critical diameter of Cu precipitates which can affect pit initiation.

Article Access Ranking

25 Jul. (Last 30 Days)

  1. Production and Technology of Iron and Steel in Japan during 2020 ISIJ International Vol.61(2021), No.6
  2. Formation and Evolution of Inclusions in High Chromium Steel ISIJ International Advance Publication
  3. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  4. Effect of Ore Type and Gangue Content on Carburization and Melting Behavior of Carbon-Iron Ore Composite ISIJ International Vol.61(2021), No.6
  5. Comprehensive Research about Critical Interaction Region Named Cohesive Zone in Series of Dissected Blast Furnaces ISIJ International Vol.61(2021), No.6
  6. Behavior of Jet from Nozzle Set on Side Wall of Lance ISIJ International Vol.61(2021), No.6
  7. Method for Simulating Gas Permeability of a Coke Bed Including Fines Based on 3D Imaging on the Coke Particle Morphology ISIJ International Vol.61(2021), No.6
  8. Hydrogen Effects on the Migration of Nanoscale Cavities in Iron ISIJ International Advance Publication
  9. Thermal Stability of Molten Slag in Blast Furnace Hearth ISIJ International Advance Publication
  10. Carbon Enrichment of Austenite during Ferrite-bainite Transformation in Low-alloy-steel Tetsu-to-Hagané Advance Publication

Search Phrase Ranking

25 Jul. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. 34crmo4 pressure vessel
  4. high hole expansion ratio
  5. 34crmo4
  6. blast furnace permeability
  7. carburization
  8. characteristics of high speed steel/ductile cast iron composite roll manufactured by electroslag remelting cladding
  9. frp cylinder using cr−mo steel liner for storing high pressure hydrogen gas
  10. gas carburization