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. 60 (2011), No. 6

  • Master's Course and Job Hunting

    pp. 275-276

    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.60.275

  • Development of Corrosion Protection Coatings Based on Impact/Deposition Phenomenon of Supersonic Particles

    pp. 277-280

    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.60.277

    A coating process is necessary to satisfy various requirements for corrosion protection. Based on clarification of the impact and deposition phenomenon of supersonic particle, the control mechanism of temperature and velocity of the in-flight particle was devised. The coating method (Warm Spray) was realized for active materials such as titanium, metallic glass, titanium oxide and plastic, which are highly corrosion-resistant while they are difficult to be deposited in the air.
  • Electrochemical Impedance Spectroscopy of Stainless Steels in Soy Sauce

    pp. 290-295

    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.60.290

    The characterization of passivation on austenitic and duplex stainless steels in soy sauce at 333 K were investigated by using electrochemical impedance spectroscopy (EIS). The soy sauce solution contained 18.4 mass% sodium chloride, 3.00 mass% organic acid, 6.80 mass% protein and 2.50 mass% ethyl alcohol at pH 4.9. These impedance spectra of stainless steels could been simulated the equivalent circuit model with four parameters, oxide capacitance, oxide resistance, charge-transfer reaction resistance and double layer capacitance. The thickness of passive films (reciprocal capacitance of films) were proportional to the resistance of films and charge transfer resistance.
  • The Phenomena of Calcium Carbonate Scale Adhesion on Various Material Surfaces

    pp. 296-303

    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.60.296

    The phenomena of scale formation of calcium carbonates on the solid plate surfaces (metals, glasses, plastics) in supersaturated solution was investigated at 25.0°C. Except for particular case, the most stable polymorph calcite was adhered and grown on the plate surface. The unstable polymorph vaterite was formed on some metal surfaces under the conditions that the metal plate was inserted in the solution just after the precipitation of CaCO3. The surface density of the number of calcite crystals on the plastic surfaces were very high compared with that on metal surfaces. Roughness of the plastic surface promotes the increase in the surface density of adhered crystals
  • Study of NH4HS Concentrating Mechanism in Air Cooled Heat Exchanger Tubes

    pp. 304-311

    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.60.304

    Highly concentrated NH4HS causes significant corrosion. In high pressure plants such as hydrodesulfurization units operated under NH4HS environments, leakage caused by corrosion could result in catastrophic disaster. Therefore, in the design phase, corrosion prevention techniques should be considered. In this study, based on the severe NH4HS corrosion observed selectively in the vapor phase inside air cooled heat exchanger tubes, the NH4HS concentrating model was developed to discern the difference in NH4HS concentration between the vapor phase and the liquid phase. We elucidated that NH4HS concentration in the condensed area in the vapor phase can be much higher than the liquid phase due to the difference of the heat transfer coefficient. This result quantitatively demonstrated the cause of corrosion observed in the air cooled heat exchanger tubes. In addition, this study indicated that the design of the air cooled heat exchanger tube where NH4HS corrosion shall be concerned should consider a flow regime, air temperature or predicted NH4HS concentration in the condensed area in the vapor phase.

Article Access Ranking

20 Apr. (Last 30 Days)

  1. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  4. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  5. Preface to the Special Issue on “Toward Suppression of Hydrogen Absorption and Hydrogen Embrittlement for Steels” ISIJ International Vol.61(2021), No.4
  6. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  7. Automatic Ultrasonic Testing of Non-metallic Inclusions Detectable with Size of Several Tens of Micrometers Using a Double Probe Technique along the Longitudinal Axis of a Small-diameter Bar ISIJ International Vol.61(2020), No.1
  8. Rapid Method to Measure Hydrogen Diffusion Coefficient in Metal Using a Multi-sine Wave Signal ISIJ International Vol.61(2021), No.4
  9. Method for Evaluating Hydrogen Embrittlement of High-Strength Steel Sheets Considering Press Formation and Hydrogen Existence State in Steel ISIJ International Vol.61(2021), No.4
  10. Effect of Rare Earth Ce on the Morphology and Distribution of Al2O3 Inclusions in High Strength IF Steel Containing Phosphorus during Continuous Casting and Rolling Process ISIJ International Vol.61(2021), No.3

Search Phrase Ranking

20 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. blast furnace permeability
  4. slag
  5. blast furnace productivity
  6. ultrasonic inclusion
  7. activity coefficient of ti in liquid iron
  8. continuous casting of electrical steel
  9. deoxygen in liquid iron
  10. electrical steel and continuous casting