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. 59 (2010), No. 6

  • Actions to Activate JSCE

    pp. 211-211

    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.59.211

  • Advances in the Study of Passive Films on Stainless Steels: from Real to Artificial Passive Films and Now from Artificial to Real Passive Films

    pp. 212-218

    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.59.212

    Studies of passive films on stainless steels are reviewed from the viewpoint of developing new resources-saved stainless steels (green stainless steels). Starting from the overview of the results of in-situ analyses for the thickness and chemical composition of real passive films, there are describing some important findings obtained from the model experiments using artificial passive films and ion-beam-sputter deposited Fe-Cr thin films, which simulate real passive films and ideal stainless steels, respectively. Finally, recent studies on the pit initiation mechanism at sulfide inclusions and on the improvement of pitting resistance by removal of the inclusions from steel surface are introduced to demonstrate a possibility of developing green stainless steels.
  • Effect of Ta Addition on Crevice Corrosion Resistance for Ni Based Corrosion Resistant Alloys

    pp. 222-227

    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.59.222

    The effects of small amount of tantalum addition to a Ni-Cr-Mo alloy on crevice corrosion resistance in 25% NaCl at 107°C was investigated quantitatively by measuring the repassivation potentials for corrosion crevice (ER,CREV). Upon the results, tantalum was revealed to shift the repassivation potentials to the noble direction and the effect was much more than the chromium or molybdenum. For the tantalum free alloys, the crevice corrosion resistance was found to correlate closely with the Pitting Resistance Evaluivalent number (PRE=[%Cr]+3.3([%Mo]+0.5[%W])), however, the tantalum containing alloys were against the correlation. Consequently, PRE(Ta)(=[%Cr]+3.3([%Mo]+0.5[%W])+7.7[%Ta]) was induced by adding a term of [%Ta] to the PRE equation. With this PRE(Ta), the crevice corrosion resistance for the tantalum containing alloys can be estimated.
  • Improvement of Weathering Resistance for Developed Thermoplastic Polyester Powder Coating for Telecommunication Plant

    pp. 228-231

    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.59.228

    Corrosion is one of the most important problems, particularly in relation to outdoor telecommunication equipment. Some corrosion prevention techniques such as crevice corrosion prevention for stainless steel and protective coatings on galvanized steel have been developed. As regards the latter, we have already developed a duplex protection system that employs resin coating and a galvanizing technique. There has been a need for weathering resistance technology that can protect telecommunications plant materials against damage during long-term use. In this work we have tried to improve the performance under various weathering conditions, in particular under ultraviolet (UV) light, which can easily damage polymer materials. Some powder paints designed to protect against UV light were prepared, and their performances were evaluated both with accelerated UV testing (e.g. with a xenon arc device) and when subjected to natural sunlight outdoor exposure in Okinawa, which has the most severe UV light conditions in Japan. We found that the UV absorber clearly improved the resistance to UV weathering. In addition, we tested for corrosion resistance under severely corrosive conditions outdoors at a coastal location on Miyakejima Island, and found that no blistering, cracking or corrosion occurred at current exposure time.

Article Access Ranking

19 Jan. (Last 30 Days)

  1. Improving Blast Furnace Raceway Blockage Detection. Part 1: Classification of Blockage Events and Processing Framework ISIJ International Advance Publication
  2. A Review of the Chemistry, Structure and Formation Conditions of Silico-Ferrite of Calcium and Aluminum (‘SFCA’) Phases ISIJ International Vol.58(2018), No.12
  3. Hydrogen Embrittlement Susceptibility Evaluation of Tempered Martensitic Steels Showing Different Fracture Surface Morphologies Tetsu-to-Hagané Vol.105(2019), No.1
  4. Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface ISIJ International Advance Publication
  5. Fusion Zone Microstructural Evolution of Al-10% Si Coated Hot Stamping Steel during Laser Welding ISIJ International Vol.59(2019), No.1
  6. Effect of Annealing Time on Oxides Phases and Morphology along Oxidized Depth of Fe-3%Si Steel during Decarburization ISIJ International Vol.59(2019), No.1
  7. Improving Blast Furnace Raceway Blockage Detection. Part 2: Signal Processing of Hot Blast Pressure Data ISIJ International Advance Publication
  8. Effects of Sulfur and Titanium Interaction in Molten Pig Iron on Erosion of Carbon Brick ISIJ International Vol.59(2019), No.1
  9. Numerical Simulation of Decarburization Kinetics for Fe-3%Si Steel during Annealing ISIJ International Advance Publication
  10. Improving Blast Furnace Raceway Blockage Detection. Part 3: Visual Detection Based on Tuyere Camera Images ISIJ International Advance Publication

Search Phrase Ranking

19 Jan. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. 鉄と鋼
  5. laser welder
  6. titanium
  7. activity feo
  8. argon steel
  9. continous annealing
  10. eaf operation