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. 65 (2016), No. 7

  • Don't Corrode 2

    pp. 285-286

    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.65.285

    x

    Readers Who Read This Article Also Read

    1. Robust Adaptive Position/Force Control of Mobile Manipulators: Theory and Experiments SICE Journal of Control, Measurement, and System Integration Vol.4(2011), No.4
    2. A Connection Model between the Positioning Mechanism and Ultrasonic Measurement System via a Web Browser to Assess Acoustic Target Strength SICE Journal of Control, Measurement, and System Integration Vol.2(2009), No.5
    3. Design Method of Fault Detector for Injection Unit SICE Journal of Control, Measurement, and System Integration Vol.2(2009), No.2
  • Current Status and Recent Research Topics of Maintenance of Exiting Railway Structures (Especially Steel Bridges)

    pp. 287-291

    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.65.287

    More than 140 years have already passed since the opening of the first railway in Japan. During that period, a lot of railway structures were constructed. Many of them have been used for more than 100 years and are still in service. In many cases, it is necessary to continue to use those existing structures with appropriate maintenance because the replacement is difficult while in service.This paper firstly describes an outline of current status of the existing railway structures, especially steel bridges, and maintenance of them. Secondly, it introduces recent topics of research and development regarding the maintenance of the steel bridges, such as monitoring, renewal and seismic retrofit.
  • Corrosion Kinetics of Type 310 EHP Stainless Steel in Nitric Acid with Cr(VI)

    pp. 302-305

    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.65.302

    Corrosion kinetics of a stainless steel in nitric acid at elevated temperature has been investigated with special emphasis placed on its correlation with reduction rate of Cr (VI) in the solution. Extra High Purity (EHP) stainless steel, which is immune to intergranular corrosion in trans-passive potential range in nitric acid solution, has been employed to examine the dominant factor of corrosion rate. The results indicate that dissolution amount of the alloy agrees well with the stoichiometric value of dissolution based on the reduction amount of Cr (VI). This fact means that the dissolution kinetics of the stainless steel is simply dominated by reduction rate of Cr (VI) in the boiling nitric acid including Cr(VI). Reduction rate constant of Cr (VI) follows the identical Arrhenius equation including all the data with and without boiling, although oxidation rate constant of Cr (III) to Cr (VI) is strongly affected by boiling. A dominant factor of corrosion rate has been cleared based on the reduction rate constant of Cr (VI) and the oxidation rate constant of Cr (III).
  • The Geometric Characterization of Crevice Corrosion Part for Inside Crevice

    pp. 307-312

    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.65.307

    SUS304 stainless steels with the metal/glass crevice were tested potentiostatically in artificial seawater. The propagation behavior of crevice corrosion during the test was observed by the original apparatus. Geometric analysis of the crevice corrosion propagation behavior with time was carried out by using crevice corrosion shape parameters that were newly defined in this paper. The main results were as follows:
    1) The corrosion depth of initiation site was about 20μm, and the place of maximum corrosion depth was located near crevice edge in any applied potential. The maximum corrosion depth was deeper under the higher applied potential. The corrosion depth of the dark gray area was below about 5μm. From these results, crevice corrosion mainly occurred at the interface between passive area and corroded area until the tip of corrosion reached to the edge of crevice. This means the dark gray part was only the trace of corrosion with corrosion products.
    2)The shape of corrosion area changed to a quasi-elliptical shape from a apparently round one with crevice corrosion propagation. This tendency became stronger at higher potential and/or as the corrosion area got close to the crevice edge.
    3)The major axis length (a) was divided into two parts at the initiation site, aedge for the edge of crevice and amp for the center of crevice. aedge became large exponentially as higher applied potential and as approaching the edge of crevice. However, aedge became slightly small with time, and the potential dependence was small.
    4)It was considered that the expanding speed of the crevice corrosion was determined by the potential of the corrosion tip. The current density at the tip was larger as the tip close to the crevice edge by increasing of the potential of the tip. As the result of this phenomenon, the expanding speed was faster as the tip position close to the crevice edge.

Article Access Ranking

27 Sep. (Last 30 Days)

  1. Recent Progress of Instrumentation Technology for Process Automation in Steel Industry Tetsu-to-Hagané Vol.106(2020), No.9
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Accuracy Improvement of the XRD-Rietveld Method for the Quantification of Crystalline Phases in Iron Sintered Ores through the Correction of Micro-absorption Effects ISIJ International Advance Publication
  4. Melting Erosion Failure Mechanism of Tuyere in Blast Furnace ISIJ International Advance Publication
  5. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Advance Publication
  6. Potential Influences of Impurities on Properties of Recycled Carbon Steel ISIJ International Advance Publication
  7. Evaluation and Prediction of Blast Furnace Status Based on Big Data Platform of Ironmaking and Data Mining ISIJ International Advance Publication
  8. Optimization Analysis of Mechanical Performance of Copper Stave with Special-shaped Tubes in the Blast Furnace Bosh ISIJ International Advance Publication
  9. Mechanism of Corrosion Protection at Cut Edge of Zn-11%Al-3%Mg-0.2%Si Coated Steel Sheets ISIJ International Vol.60(2020), No.9
  10. Influence of Soil Particle Size, Covering Thickness, and pH on Soil Corrosion of Carbon Steel ISIJ International Advance Publication

Search Phrase Ranking

27 Sep. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. blast furnace productivity
  4. ultrasonic testing bar small diameter
  5. jeong-sik kim
  6. ultrasonic inclusion
  7. isij international
  8. 柳修介
  9. continuous casting of copper alloys
  10. tetsu