Steel Science Portal

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. 67 (2018), No. 4

  • JSCE Materials and Environments 2018

    Kazuhiko Noda

    pp. 135-136

    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.67.135

  • Ⅲ. Advanced Electrochemical Methods for Corrosion Study―Kelvin Method―

    Eiji Tada

    pp. 145-149

    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.67.145

    Abstract

    In this paper, Kelvin method, which can be utilized to measure a contact potential difference between two dissimilar metals, is introduced. A basic principle of Kelvin method for the measurements of the contact potential differences is described. Some measured results in some corrosion systems are also explained.

  • Ⅲ. Advanced Electrochemical Methods for Corrosion Study―ACM Type Corrosion Sensor―

    Shin-ichi Motoda

    pp. 150-155

    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.67.150

    Abstract

    Corrosion behavior under thin water film like atmospheric corrosion is different from underwater environment. Conventional electrochemical techniques can not be applied to such corrosion in a non-submerged environment, and galvanic couples have been applied conventionally. These are commonly referenced as ACM. The authors have tried to evaluate the corrosion of each environment mainly by applying the ACM type corrosion sensors consisting of Fe/Ag couples, exposing them to various environment. In this paper, the electrochemical properties of the ACM sensor were discussed.

  • Ⅲ. Advanced Electrochemical Methods for Corrosion Study―Electrochemical Quartz Crystal Microbalance―

    Yu Sugawara

    pp. 156-161

    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.67.156

    Abstract

    Electrochemical quartz crystal microbalance （EQCM） is a method to determine a mass change related to electrode reactions by measuring a change in the resonance frequency of the quartz. Because the EQCM can detect a nano-scale mass change, it is a powerful tool for analysis of electrode reactions. This article provides an introduction of the EQCM principle, applications of the EQCM to corrosion studies, and problems for measurements.

  • Improvement of Solubility of Corrosion Inhibitor by Sulfite and its Influence on Iron Passivation in Absorption Refrigeration Systems

    Hanami Tezuka, Shogo Tsukazawa, Hitoshi Yashiro, Hidenori Inabe, Yoichi Hirata, Kazuki Hatoya, Takashi Hishinuma

    pp. 164-167

    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.67.164

    Abstract

    In absorption refrigeration systems, molybdate is used as a key inhibitor against corrosion of steel, although it is liable to precipitate because of its limited solubility in a concentrated LiBr solution. In this research, the use of sulfite is proposed as a precipitation inhibitor for molybdate and its effect on the passivation of iron is examined. The effect of the stronger passivator of nitrate on the actions of sulfite is also investigated. The results show that sulfite decreases the amount of corrosion of iron and promotes the formation of the oxide layer （MoO2, Fe3O4） on the surface of iron irrespective of presence of nitrate. Thus, sulfite is concluded as an effective additive in an absorption refrigerator for better control of molybdate concentration and corrosion of iron.

  • Effect of Humidity and Oxygen Concentration on Stress Corrosion Cracking of Phosphorous Deoxidized Copper Tube

    Masahiro Sakai, Masato Kumagai, Akira Osaka, Tomoyoshi Irie, Hiroshi Yakuwa

    pp. 168-171

    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.67.168

    Abstract

    C-ring stress corrosion tests under three conditions were carried out to investigate the effect of humidity and oxygen concentration on stress corrosion cracking of phosphorous deoxidized copper tubes. Three conditions were high humidity, low humidity and low oxygen conditions. The relative humidity and oxygen concentration were 100％ and about 20％ respectively in the high humidity condition. The air in the container with desiccant agent stored at a relative humidity of 90 to 95％ in the low humidity condition. In the low oxygen condition, the air in the container was replaced by the nitrogen gas and kept the concentration of oxygen less than 5％ during the exposure test. Although stress corrosion cracks occurred in the specimens exposed under both high humidity and low oxygen conditions, the time to occurrence of SCC under the low oxygen condition was longer than that under the high humidity condition. No SCC and intergranular corrosion developed in the specimen exposed under the low humidity condition for one week. It was found that lowering the humidity has an inhibitive effect on the SCC of the phosphorous deoxidized copper tube.

  • Evaluation of Corrosion Rate and Diffusible Hydrogen Content of High Tensile Steel under Loading with Corrosion Environment

    Gaku Kitahara, Aya Tsuji, Takashi Asada, Tomohiro Suzuki, Keitaro Horikawa, Hidetoshi Kobayashi

    pp. 172-178

    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.67.172

    Abstract

    Corrosion rate and diffusible hydrogen content of high tensile steel under constant load testing （CLT） in pH2 corrosive solution were investigated using electrochemical impedance spectroscopy （EIS） and thermal desorption spectroscopy （TDS）. Rp－1 which is an index of corrosion rate increased as stress increased, which was correlated with the result of corrosion weight loss. This considered to be due to an increase in active nascent surfaces with increasing stress. Diffusible hydrogen content increased with stress, in particular by plastic deformation. The latter was more affected by the effect of corrosion rate and diffusible hydrogen content on stress. In other words, we have concluded that diffusible hydrogen content which related to hydrogen embrittlement was more affected by defects in steels by deformation than hydrogen entry from surface corrosion reaction in corrosion environment.

  • A Corrosion Example of Aluminum in Organic Solvent

    Matsuho Miyasaka

    pp. 179-184

    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.67.179

    Abstract

    An example of Al corrosion in organic solvent is shown here. Severe Al corrosion occurred in a short time in Polypropylene Glycol Monobutyl Ether （PGME） including about 2％ of N-Phenyl-1-Naphtylamine at a temperature of 110℃. An investigation showed that the corrosive medium of Al was PGME itself, the principal component of the solvent. Al is replaced with H of OH group, a component of PGME, to form an organic Al compound, dissolving in PGME, while H separated from PGME changed into hydrogen gas. Here we show the corrosion status, the procedure and results of the investigation, and the results of the corrosion reproduction test.
  • © 2018 Japan Society of Corrosion Engineering

Article Access Ranking

25 Feb. (Last 30 Days)

  1. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  2. Recovery of Phosphorus from Modified Steelmaking Slag with High P2O5 Content via Leaching and Precipitation Tetsu-to-Hagané Vol.107(2021), No.2
  3. Time-resolved and in-situ Observation of Semisolid Deformation in Al–Cu Alloys with Equiaxed and Columnar Grain Structures by Using a Combination Technique of 4D-CT and 3DXRD ISIJ International Advance Publication
  4. Review on the High-Temperature Thermophysical Properties of Continuous Casting Mold Fluxes for Highly Alloyed Steels Tetsu-to-Hagané Vol.107(2021), No.1
  5. Effect of Varied Oxygen Levels on the Oxidation of a Magnetite Pellet Bed during Pot Furnace Induration ISIJ International Advance Publication
  6. Iron Ore Sintering in Milli-Pot: Comparison to Pilot Scale and Identification of Maximum Resistance to Air Flow ISIJ International Advance Publication
  7. Improvement of Bragg-edge Neutron Transmission Imaging for Evaluating the Crystalline Phase Volume Fraction in Steel Composed of Ferrite and Austenite ISIJ International Advance Publication
  8. Influence of Initial Crystal Orientation and Carbon Content on Rolling Texture in 3 mass % Si steel Tetsu-to-Hagané Advance Publication
  9. Effects of Iron Ores on the Combustion Behavior of Coke and NOx Emission during Sintering Process ISIJ International Advance Publication
  10. Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets ISIJ International Vol.61(2021), No.2

Search Phrase Ranking

25 Feb. (Last 30 Days)

  1. blast furnace
  2. blast furnace permeability
  3. lme rsw
  4. 西山記念技術講座
  5. a practical approach to enhance wear resistance of bearings in molten zinc
  6. blast furnace coal tar injection
  7. blast furnace productivity
  8. lme
  9. sinter pot for temperature measurement of the top layer during and after the ignition
  10. spa-h