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. 2

  • Miscellaneous Thoughts about Branch Activity

    pp. 43-44

    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.65.43

  • Preferential Dissolution Mechanism of α or γ phase in Crevice Corrosion of Duplex Stainless Steels

    pp. 45-50

    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.65.45

    Duplex stainless steels (DSS) possess a ferritic (α) phase matrix dispersed with austenitic (γ) phase precipitates. Due to the chemical compositional arrangement and the characteristic α/γ dual phase structure, DSS possess superior mechanical properties and corrosion resistance without sacrificing economic performance. In any case, even DSS suffer from crevice corrosion. Accordingly, the measure of crevice corrosion is of pragmatic importance. The modes of crevice corrosion on DSS were complex because of its preferential dissolution and distinguishable as some types from the outside to the center of the crevice: the passivity retention region, the region with preferential dissolutions of γ phase precipitates, and the region with preferential dissolution of the α phase matrix. It is described the study to elucidate the preferential dissolution mechanism of crevice corrosion on DSS, based on the in-situ observation of crevice corrosion dissolution behavior, and the analysis of dissolution behavior of DSS, α and γ phases in a simulated crevice solution.
  • Study on Corrosion Environment of the Copper Parts by Condensate Liquid of Diesel Engine Combustion Gasses

    pp. 59-66

    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.65.59

    A copper part (C1100), used in an EGR-equipped engine, got corroded. This copper part was directly contacting an iron part (S45C), for which the iron part should have been corroded before the copper one began being corroded, because iron is less noble than copper. However, it was found that the corrosion had taken place only on the copper part.
    In order to clarify the reason, we investigated the phenomenon for substances related to the corrosion and tried to identify how the environments became corrosive and what mechanisms caused the corrosion, using a chemical method.
    As the result, we came up with the conclusion that a solution consisting of sulfuric acid and nitric acid might probably have worked on the corrosion, by verifying that copper becomes more corrosive than iron in a place where nitric acid is present.
  • Solution pH and Specific Solution Volume to Specimen Surface Area on Corrosion Reactions and Hydrogen Absorption of Steel in Solutions Containing Thiocyanate Ion.

    pp. 67-74

    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.65.67

    An ammonium thiocyanate (NH4SCN) solution is widely used in hydrogen embrittlement evaluations of high-strength steel materials. It is known that an increase in the specific solution volume to the specimen surface area results in a severe evaluation in hydrogen embrittlement testing. The reason for that is explained in this paper based on the change in the solution pH induced by a cathodic reaction, which accompanies thiocyanate ion decomposition and governs hydrogen absorption. In addition, the pH dependence of the cathodic reaction governing hydrogen absorption is made clear by using a sodium thiocyanate solution containing a buffer solution to control the solution pH. It is shown that immersing steel specimens in the pH-controlled sodium thiocyanate solution achieves a higher hydrogen content compared with the level attained with the NH4SCN solution.

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