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. 68 (2019), No. 7

  • An Education Case of Corrosion Science & Engineering in Mechanical Engineering Department

    pp. 161-161

    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.68.161

    x

    Readers Who Read This Article Also Read

    1. Study on Differential Aeration Cell Corrosion owing to Differential Flow Rate Zairyo-to-Kankyo Vol.40(1991), No.6
    2. Automatic Building Extraction Based on Analysis of Color Cluster Transactions of the Institute of Systems, Control and Information Engineers Vol.32(2019), No.9
    3. Adaptive Stepsize Rule for Consensus Optimization by Supervisory Control Architecture Transactions of the Institute of Systems, Control and Information Engineers Vol.32(2019), No.9
  • Corrosion Inhibition Mechanisms of Inhibitors in Acid Solutions Considered Based on the Hard and Soft Acids and Bases Principle

    pp. 162-168

    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.68.162

    Inhibition mechanisms of adsorption and precipitation inhibitors for metallic corrosion in acid solutions were discussed based on the hard and soft acids and bases principle. A markedly high inhibition efficiency of decamethyleneimine(CH210 NH was explained by the formation of a stable chemisorption bond between Fe surface(soft acid) and N atom of the imine(soft base) caused by strain in the ring. Inhibition of cationic electrostatic adsorption inhibitors, back-donation inhibitors, dibenzylsulfoxide, propargyl alcohol, bismuth ion and benzylthiocyanate were also discussed on the basis of the principle.
  • Investigation of Corrosion and Hydrogen Entry Behavior under Atmospheric Environment by Real-time Monitoring Techniques

    pp. 171-177

    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.68.171

    To develop high strength steel with high resistance to hydrogen embrittlement, it is necessary to clarify the mechanism of hydrogen entry into steel. Hydrogen entry is caused by corrosion reaction under atmospheric environment. However, the relationship between hydrogen entry and corrosion behavior, and the influence of environmental factors on the hydrogen entry such as temperature, relative humidity(RH) and salt deposition are not fully understood. In this study, simultaneous monitoring of both hydrogen entry and corrosion rate was employed to investigate the influence of environmental factors on hydrogen entry and corrosion behavior. The monitoring was conducted under the atmospheric exposure test.As a result, hydrogen entry and corrosion rate increased with increase of amount of salt deposition. Corrosion rate increased with increase of RH, whereas hydrogen entry had a maximum at medium RH. The mechanism of promotion of the hydrogen entry at medium RH range was assumed to be related to lowering pH due to hydrolysis of Fe3+ in high [Cl] environment.
  • Fundamental Study of Coating-type Sensor for Detection of Infrastructure Deterioration

    pp. 178-181

    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.68.178

    This paper presents a coating-type sensor for more efficient remote inspection of infrastructures that are large in scale and have complicated shapes. For crack detection, electromagnetic waves at around 0.2~2.0 GHz penetrated the coating sensor film, and we observed the reflected waves. Measurement and simulation results confirmed that the sensor detects cracks occurring in the coated films with lengths of about 15% on one side of the sensor.
  • Change in Electrochemical Impedance Spectrum of Coated Steel Plate by High Temperature・High Humidity-Cold Cycle test

    pp. 182-186

    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.68.182

    Painted steel panel uses for automotive body. Therefore, assessments of painted steel corrosion protecting life are important. Automotive body is exposed to various atmospheric environments. Atmospheric environmental factors (temperature, humidity, adhering salt type, etc.) are influenced on corrosion protecting life of the painted steel. In order to evaluate the corrosion protection performance in a short time, we study evaluation of coating film degradation using EIS (Electrochemical Impedance Spectroscopy). As a result, it was found that coating thickness, adhesion salt type and presence/absence of freezing process may contribute to degradation of corrosion protection performance.
  • Evaluation of Corrosion Properties of Steel with Zn-30mass% Al Thermal-Spray Coating Using Accelerated Atmospheric Exposure Test

    pp. 187-193

    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.68.187

    A four-year atmospheric exposure test was performed on steel with Zn-30mass%Al thermal-spray coating using the accelerated atmospheric exposure test, and atmospheric corrosion properties was evaluated. X-ray diffraction results showed that the corrosion products which formed on the coating film as a result of the accelerated atmospheric exposure test were the same as those which formed in a typical atmospheric exposure test. The amount of corrosion of the spray-coated film in the accelerated atmospheric exposure test was promoted by approximately 1.5 to 2.0 times compared to the atmospheric exposure test.

Article Access Ranking

16 Apr. (Last 30 Days)

  1. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  4. Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet ISIJ International Vol.61(2021), No.3
  5. Structural and Mechanical Characterizations of Top Dross in a Molten Zinc Bath ISIJ International Vol.61(2021), No.3
  6. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  7. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire ISIJ International Advance Publication
  8. Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification ISIJ International Vol.61(2021), No.3
  9. Prediction of Spatial Composition Distribution of Inclusions in the Continuous Casting Bloom of a Bearing Steel under Unsteady Casting ISIJ International Vol.61(2021), No.3
  10. Improvement in Reduction Behavior of Sintered Ores in a Blast Furnace through Injection of Reformed Coke Oven Gas Tetsu-to-Hagané Vol.107(2021), No.4

Search Phrase Ranking

16 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. tetsu-to-hagané
  4. blast furnace productivity
  5. slag
  6. blast furnace permeability
  7. continuous casting of electrical steel
  8. deoxygen in liquid iron
  9. electrical steel and continuous casting
  10. equilibrium of deoxygen in liquid iron