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. 55 (2006), No. 12

  • Request for the Research of Corrosion Engineering

    pp. 525-525

    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.55.525

  • Corrosion of Painted Steel Railway Bridges and its Countermeasures

    pp. 526-531

    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.55.526

    In maintenance management of a painted steel railway bridge, appropriate corrosion prevention measures are needed. For establishing effective corrosion prevention measures, it is important to make clear classifications of coating degradation patterns. Accordingly we made a lot of observations on coating films of numerous bridges. The results of the observations showed that a coating degradation could be classified into some patterns, and that the coating degradation patterns (such as corrosion under coating, checking of coating, and peering of coating) were affected by construction environment and bridge ages.
  • Effect of Surface Hydrogen Contents on Hydrogen Embrittlement Properties of Stainless Steels

    pp. 537-543

    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.55.537

    Susceptibility to hydrogen embrittlement (HE) of austenitic stainless steels were investigated by Slow Strain Rate Testing (SSRT), both in gaseous hydrogen environment pressurized at 45 MPa and under electrochemical cathodic charging conditions. Test results were discussed based on estimated surface hydrogen contents of the unstressed steels into which hydrogen was charged under the same test conditions as SSRT. HE susceptibility of the steels in both gaseous hydrogen environments and electrochemical cathodic charging depended upon estimated surface hydrogen contents. Minimal of surface hydrogen content for HE were less than 10 ppm for 304L steel, and 100 ppm for 316L, respectively. The threshold value for 316L exceeded the content of hydrogen naturally absorbed from 45 MPa gaseous hydrogen environments, indicating that 316L has a sufficient resistance to hydrogen embrittlement in gaseous hydrogen environment pressurized at 45 MPa.
  • Formation of Nickel Hydroxide Thin Layer on the Surface of Nickel Electrode

    pp. 544-548

    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.55.544

    Transient of current in thin layer formation on nickel electrode was investigated during an anodic potential step in 0.1 M NaOH aqueous solution. The current was shown to have a time-dependency of i(t)=i0[1+(t/τ)]-1/2 which was derived from ionic migration under potential drop through the surface thin film. In the equation, the initial current, i0, and the time constant, τ, after the potential step were estimated from the slope and the intercept on the 1/i2 vs. t plot, respectively. From a plot of i02τ vs. φ, the oxide layer thickness at the potential, φ0, before the step and an average ionic mobility in the oxide film were calculated. The oxide layer was found to grow from the potential of 0.02 V vs. SCE and to saturate in thickness at 1.3 nm at the potential range between 0.2 and 0.4 V. The average mobility was estimated to be μ=9.9×10-20m2V-1s-1.
  • Passivation Behavior of Iron in Concentrated LiBr Solutions Containing Molybdate and Nitrate at Elevated Temperature

    pp. 549-553

    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.55.549

    Since the control of corrosion by the addition of inhibitors is one of the key technologies for the adsorption refrigeration systems, the passivation behavior of an iron electrode in the 17.3 mol/kg LiBr+0.1 mol/kg LiOH solution containing molybdate and nitrate has been investigated at 428 K through electrochemical measurements and film analysis by radio frequency grow discharge optical emission spectroscopy (rf-GDOES). The results indicated that molybdate worked as a principal inhibitor in the system; molybdate was able to passivate iron without causing any pitting. However, the oxidizing power of molybdate was not sufficient to form a passive film on iron rapidly enough. The process could be assisted by the addition of nitrate; iron was passivated very quickly when the solution contained both molybdate and nitrate. Cares should be paid to that nitrate of higher concentrations could cause pitting especially when the concentration of molybdate was relatively low. The oxide films formed on iron in the presence of molybdate and nitrate were much thinner than those formed with only molybdate.

Article Access Ranking

01 Dec. (Last 30 Days)

  1. Heat conduction through different slag layers in mold. Thermal conductivity measurement of commercial mold fluxes ISIJ International Advance Publication
  2. Deformation of Non-metallic Inclusions in Steel during Rolling Process: A Review ISIJ International Vol.62(2022), No.11
  3. Activity of Chromium Oxide in Calcium Silicate Bearing Molten Slag for Highly Clean Chromium Steel Refining Process ISIJ International Advance Publication
  4. Effects of basicity and Al2O3 content on the crystal structure of silico-ferrite of calcium and aluminum ISIJ International Advance Publication
  5. Behavior and kinetic mechanism analysis of dissolution of iron ore particles in HIsmelt process based on high-temperature confocal microscopy ISIJ International Advance Publication
  6. Corrections of the figure in the paper “Effect of Cerium and Magnesium Addition on Evolution and Particle Size of Inclusions in Al-killed Molten Steel” [ISIJ International, Vol. 62 (2022), No. 9, pp. 1852-1861] ISIJ International Vol.62(2022), No.11
  7. Dissolution of Chromium from Steelmaking Slag–Cr-containing Mineral Phases and Synthetic Slags– Tetsu-to-Hagané Vol.108(2022), No.11
  8. Effect of Molten Steel Composition on Inclusion Modification by Calcium Treatment in Al-Killed Tinplate Steel ISIJ International Advance Publication
  9. Characterization and Control of Secondary Phase Precipitation of Nb–V–Ti Microalloyed Steel during Continuous Casting Process ISIJ International Vol.62(2022), No.11
  10. Improvement of Sinter Productivity and Qualities by Placing Low Slag Green Pellet at Lower Layer of Sinter Packed Bed ISIJ International Vol.62(2022), No.11

Search Phrase Ranking

01 Dec. (Last 30 Days)

  1. blast furnace
  2. si-killed spring steel
  3. converter slag
  4. 高温変形抵抗
  5. 钢渣脱磷
  6. 5%nickel
  7. coatings hot formed steel
  8. free lime
  9. secondary cooling billet
  10. si killed spring steel wire rod