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. 53 (2004), No. 2

  • Evaluation of Atmospheric Corrosion Resistance in Simulated Seaside Environment for Various Kinds of Stainless Steels with Different Surface Treatments

    pp. 69-75

    Bookmark

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

    Log in / Sign Up
    Typical austenitic, ferritic and duplex stainless steels with different surface treatments were put to laboratory simulated seaside environment corrosion testing. Tests were measurement of pitting potential in 3% NaCl solution at room temperature, and corrosion under MgCl2 deposit at 40°C and 50% relative humidity, which is an accelerated seaside environment. Kelvin probe was used to study the surface properties of materials. Pitting potential in 3% NaCl, and simulated seashore atmospheric corrosion testing gave adequate data for evaluating corrosion of stainless steels under chloride particles. Kelvin probe was useful in corrosion monitoring on whether stainless steel was attacked or not by chlorides.
  • Investigation of Mechanical Properties of Oxide Films Formed on Carbon Steel at High Temperature Corrosive Environments

    pp. 76-82

    Bookmark

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

    Log in / Sign Up
    The surface degradation of metals that occurs in high temperature corrosive environments has been severe problems of boiler materials in fuel combustion power plant systems. The damage to materials has been often accelerated by mechanical removal of oxide films formed on the material surface. It is therefore very important to investigate mechanical properties and adhesiveness of oxide films at practical high environments, in order to discuss life cycle assessment. Corrosion/oxidation tests were conducted at high temperature corrosive environments of wet air, water steam with hydrogen chloride to look into basic behavior of the corrosion/oxidation. Impact tests were performed on the surface of carbon steel covered with oxide films in the same environments to obtain mechanical properties and adhesiveness of the oxide films. It was found that the corrosive environments increased oxidation of carbon steel a little, and that decreased the fracture strength and other mechanical properties of the oxide films.
  • Effects of Cu on Corrosion Resistance of Duplex Stainless Steel with Lower Ni and Mo Contents

    pp. 83-87

    Bookmark

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

    Log in / Sign Up
    Corrosion resistance of duplex stainless steels containing 4%Ni-23%Cr-0.3%Mo-0.2%N and 0 to 2%Cu was investigated in aqueous chloride solutions. The addition of Cu showed no effect on the pitting potential, while it improved the crevice corrosion potential and the repassivation potential. The Cu alloying was effective on suppressing the pitting corrosion in boiling 25%NaCl solution with phosphoric acid, but was not effective in that with dichromate. The Cu addition was effective on improving the resistance to depassivation in acidic environments, while it increased the passive current density and the critical passivating current density.
  • Measurement of I-E Curve of Carbon Steel in Fresh Water

    pp. 88-94

    Bookmark

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

    Log in / Sign Up
    The electrochemical method to obtain the i-E curve of carbon steel in the fresh water has been developed. The electrochemical impedance spectra were measured during the measurement of potentiodynamic polarization curve. The precise solution resistance could be determined by the 3-D impedance plots, and the iR drop was compensated for the i-E curve. Furthermore, the variation of the solution resistance was monitored to discuss the variation of solution nature during the measurement of i-E curve. The Pd-H electrode was employed as a reference electrode, because the Pd-H electrode is stable in the aqueous solution and yields no contamination of the solution. Beside, the electrochemical cell in which the solution was impinged onto the working electrode was constructed in order to avoid the variation of the solution composition due to the working electrode reaction. The present method was applied to the measurement of i-E curve of carbon steel in the tap water, and the relationship between i-E curve and the corrosion mechanism of the carbon steel was discussed.

Article Access Ranking

19 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. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  4. Steam Reforming of Methane on Sponge Iron: Influence of Gas Composition on Reaction Rate ISIJ International Vol.61(2020), No.1
  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. 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
  8. Improvement in Reduction Behavior of Sintered Ores in a Blast Furnace through Injection of Reformed Coke Oven Gas Tetsu-to-Hagané Vol.107(2021), No.4
  9. Rapid Method to Measure Hydrogen Diffusion Coefficient in Metal Using a Multi-sine Wave Signal ISIJ International Vol.61(2021), No.4
  10. 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

Search Phrase Ranking

19 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. blast furnace permeability
  4. blast furnace productivity
  5. slag
  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