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. 64 (2015), No. 8

  • Challenge to the Uncertain Future

    pp. 341-341

    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.64.341

  • Present Status of Various Analytical Techniques for Characterizing the Composition and Structure of Material Surfaces

    pp. 342-347

    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.64.342

    Advanced surface analytical methods are outlined, and they are used to obtain new information on the surface phenomena of materials surfaces. For instance, angle-resolved X-ray photoelectron spectroscopy is used for analyzing the surface segregation of chromium and nitrogen on stainless steels and the native oxidation of their surfaces. X-ray absorption spectroscopy using synchrotron radiation is utilized for analyzing the chemical state and local structure of Fe in green rust.
  • In Situ Observation Techniques of Protective Oxide Layer

    pp. 348-352

    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.64.348

    In situ analyzing techniques for investigating a surface and interface change during corrosion and oxidation of metals by using Raman scattering spectroscopy (Raman), X-ray diffraction (XRD) and X-ray photoemission spectroscopy (XPS) are present. The Raman spectra revealed that a crystal structure and distribution of corrosion products varied during corrosion progress at elevated temperature and high pressure electrolyte. Time dependent XRD measurments made clear the behavior of the electrochemical reduction of a rust and the iso thermal transformation of a scale on a steel. It was demonstrated that XPS was capable of the in-situ measurments for initial stage of high temperature oxidation.
  • Corrosion Behavior inside Crevice of Stainless Steels under Cyclic Corrosion Test

    pp. 358-365

    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.64.358

    Cyclic corrosion tests, consisting of NaCl solution spraying, drying, and wetting process, were conducted using a crevice-structured spot-weld specimen of SUS436L in order to clarify the relation between corrosion behavior and amount of chloride accumulated into the crevice. The main component of chlorides accumulated into the crevice was sodium chloride coming from sprayed NaCl solution, although far less amount of metallic chlorides was also contained. The chloride content in the crevice depended on the concentration of spraying NaCl solution. When the concentration of spraying NaCl solution was 0.86 kmol・m-3, the amount of chloride reached about 20 mmol・m-2 and the maximum corrosion depth in the crevice increased as cycle number increased. When the amount of chloride reached about 20 mmol・m-2, the total amount of iron and chromium ions reached about 0.5 mmol・m-2 in the crevice. It is considered that pH in the crevice reached under depassivation pH of SUS436L, when the total amount of iron and chromium ions were 0.5 mmol・m-2. It is necessary that chloride which contains specific amount of metallic chlorides accumulate into the crevice for corrosion to proceed in the depth direction.
    x

    Readers Who Read This Article Also Read

    1. Diffusion Behavior of D2O in the Film on Fe Oxidized at High Temperature in Air Zairyo-to-Kankyo Vol.64(2015), No.5
    2. Corrosion Rate for Silver Exposed to Indoor Atmosphere Zairyo-to-Kankyo Vol.64(2015), No.1
  • Dissolution Behavior of Duplex Stainless Steels in Crevice Corrosion Growth Step

    pp. 366-372

    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.64.366

    The objective of this study is to clarify dissolution behavior of duplex stainless steels in crevice corrosion growth step. Crevice corrosion grew on the duplex stainless steels by holding potential at various values. After a certain period, dissolution behavior of the crevice corrosion was analyzed based on observation of corroded area. Change in crevice corrosion dissolution behavior with time was also investigated by means of in-situ observation. Four types of dissolution regions could be observed in the corrosion area from outside toward inside direction, i.e., tip of the corroded area toward initiation point, in a crevice; they were passive region, the preferential dissolution region of γ phase, α phase and γ phase dissolution region, and the preferential dissolution region of α phase. The crevice corrosion which maintained that four dissolution regions grew toward the edge of the crevice. This dissolution behavior was given at all the potential where crevice corrosion occurred.

Article Access Ranking

16 Jan. (Last 30 Days)

  1. 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
  2. Improving Blast Furnace Raceway Blockage Detection. Part 1: Classification of Blockage Events and Processing Framework ISIJ International Advance Publication
  3. Phase Transformation Behavior of Oxide Scale on Plain Carbon Steel Containing 0.4 wt.% Cr during Continuous Cooling ISIJ International Vol.58(2018), No.12
  4. Hydrogen Embrittlement Susceptibility Evaluation of Tempered Martensitic Steels Showing Different Fracture Surface Morphologies Tetsu-to-Hagané Vol.105(2019), No.1
  5. Improvement of Sinter Productivity by Control of Magnetite Ore Segregation in Sintering Bed ISIJ International Vol.58(2018), No.12
  6. Gasification and Migration of Phosphorus from High-phosphorus Iron Ore during Carbothermal Reduction ISIJ International Vol.58(2018), No.12
  7. Effect of TiO2 and MnO on Viscosity of Blast Furnace Slag and Thermodynamic Analysis ISIJ International Vol.58(2018), No.12
  8. Effect of Coke Size on Reducing Agent Ratio (RAR) in Blast Furnace ISIJ International Vol.58(2018), No.12
  9. High Temperature Thermal Diffusivity Measurement for FeO Scale by Electrical-Optical Hybrid Pulse-Heating Method ISIJ International Vol.58(2018), No.12
  10. Improving Blast Furnace Raceway Blockage Detection. Part 3: Visual Detection Based on Tuyere Camera Images ISIJ International Advance Publication

Search Phrase Ranking

16 Jan. (Last 30 Days)

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