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. 56 (2007), No. 1

  • Sensitive Response to Social Demands

    Jun'ichi Sakai

    pp. 1-1

    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.56.1

  • Recent Topics of Cycle Chemistry in Fossil Power Plant

    Takayuki Mizuno

    pp. 2-6

    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.56.2

    Abstract

    With the aim of having management support for cycle chemistry program, many utilities have been performing EPRI benchmarking process, which assesses the benefit of cycle chemistry monetarily. Some utilities reported movement toward world class in cycle chemistry and reduction of the loss due to the cycle chemistry significantly. As improved cycle chemistry, AVT without N2H4 and equilibrium phosphate treatment were prevailed in U.S.A, etc..

  • Comparative XPS Study of Silver and Copper Surfaces Exposed to Flowing Air Containing Low Concentration of Sulfur Dioxide

    Masamitsu Watanabe, Hiroshi Ando, Takao Handa, Toshihiro Ichino, Nobuo Kuwaki

    pp. 10-15

    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.56.10

    Abstract

    Sulfur dioxide (SO2) is a typical gas affecting the atmospheric corrosion of metals, particularly outdoors. Although many studies have investigated the effect of SO2 on the atmospheric corrosion of silver and copper, little is known about the early stage of their corrosion behavior. In this study we analyzed the chemical state of sulfur on silver and copper plates exposed to flowing air containing low concentrations (18 and 148 ppb) of SO2 using X-ray photoelectron spectroscopy (XPS). The shapes of the spectra were the same for both concentrations, indicating that the chemical state of the analyzed elements did not depend on the SO2 concentration. There was a difference in the chemical state of the sulfur between the silver and copper. Three peaks were observed in the S 2p XPS spectra for the silver originating from bisulfite, S2O52-, S2O32-, and S2-. The bisulfite resulted from SO2 dissolution into the surface electrolyte, and the others resulted from the reduction of sulfurous acid. In contrast, only bisulfite was observed in the S 2p XPS spectra for the copper. It also originated from the dissolution of SO2 into the surface electrolyte. The difference in the chemical state of the sulfur between the silver and copper is attributed to the presence of native oxides on the surface, which may have impeded the reduction of bisulfite.

  • Effect of Cold Work and Heat Treatment on Transpassive Corrosion of Fe-18Cr-14Ni Alloys Containing Controlled Level of Impurities

    Masami Mayuzumi, Kenji Kako, Johji Ohta

    pp. 16-21

    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.56.16

    Abstract

    Effects of solution annealing condition, homogenizing, cold or hot rolling, aging, and the combination of cold rolling and aging were investigated on the corrosion resistance of Fe-18%Cr-14%Ni-0.5%Si-1.0%Mn alloys containing 100 ppm of C, P and S in concentrated boiling nitric acid. It was found that the corrosion resistance of Fe-18%Cr-14%Ni-0.5%Si-1.0%Mn alloys was remarkably degraded by the combined effect of 30% cold rolling and aging at 973 K, although neither cold rolling nor aging showed much influence on the corrosion resistance of the alloys. It was suggested that the degradation of corrosion property was induced by P segregation to grain boundaries of the alloys from the investigations into the micro-structural change and the impurity effect.
    It was also shown that Fe-18%Cr-14%Ni-0.5%Si-1.0%Mn alloys had superior corrosion resistance to SUS 304 L stainless steel in boiling 5 kmol/m3 nitric acid containing highly oxidizing ions.

  • Stress Corrosion Cracking Susceptibility of Various Solution Annealed Austenitic Stainless Steels in High Temperature Water

    Jiro Kuniya, Shigeki Kasahara, Hideya Anzai, Haruo Fujimori

    pp. 22-28

    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.56.22

    Abstract

    Stress corrosion cracking (SCC) susceptibility of various solution annealed, non-sensitized, austenitic stainless steels was examined in high temperature water using creviced bent beam (CBB) and creviced uniaxial constant load (UCL) tests. The following results were obtained in this study.
    (1) 304, 304L, 316L, 316NG and 347NG were susceptible to SCC under the crevice and high applied stress conditions.
    (2) Deformation induced martensite is not necessary but accelerating factor for SCC in various solution annealed austenitic stainless steels.
    (3) CBB test and creviced UCL test give different results on the effect of cold work on the SCC susceptibility in various solution annealed austenitic stainless steels because of the difference in strain under their test conditions.
  • © 2007 Japan Society of Corrosion Engineering

Article Access Ranking

25 Feb. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Recovery of Phosphorus from Modified Steelmaking Slag with High P2O5 Content via Leaching and Precipitation Tetsu-to-Hagané Vol.107(2021), No.2
  3. Time-resolved and in-situ Observation of Semisolid Deformation in Al–Cu Alloys with Equiaxed and Columnar Grain Structures by Using a Combination Technique of 4D-CT and 3DXRD ISIJ International Advance Publication
  4. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Vol.107(2021), No.1
  5. Effect of Varied Oxygen Levels on the Oxidation of a Magnetite Pellet Bed during Pot Furnace Induration ISIJ International Advance Publication
  6. Iron Ore Sintering in Milli-Pot: Comparison to Pilot Scale and Identification of Maximum Resistance to Air Flow ISIJ International Advance Publication
  7. Improvement of Bragg-edge Neutron Transmission Imaging for Evaluating the Crystalline Phase Volume Fraction in Steel Composed of Ferrite and Austenite ISIJ International Advance Publication
  8. Influence of Initial Crystal Orientation and Carbon Content on Rolling Texture in 3 mass % Si steel Tetsu-to-Hagané Advance Publication
  9. Effects of Iron Ores on the Combustion Behavior of Coke and NOx Emission during Sintering Process ISIJ International Advance Publication
  10. Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets ISIJ International Vol.61(2021), No.2

Search Phrase Ranking

25 Feb. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. lme rsw
  4. 西山記念技術講座
  5. a practical approach to enhance wear resistance of bearings in molten zinc
  6. blast furnace coal tar injection
  7. blast furnace productivity
  8. lme
  9. sinter pot for temperature measurement of the top layer during and after the ignition
  10. spa-h