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. 50 (2001), No. 6

  • Combats against Corrosion in Chemical Plants in 20th Century and Future Problems

    pp. 256-263

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    It is reviewed the contribution of the corrosion engineering for the modern chemical process development in the 20th century through the struggle against corrosion in the chemicals production field and considered how to overcome the corrosion problem in this field.
  • Surface-Enhanced Raman Scattering Spectroscopy to Investigate Mechanism of Corrosion Inhibition

    pp. 264-270

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    Investigations on inhibition mechansims of copper corrosion in aqueous solutions by surface-enhanced Raman scattering (SERS) spectroscopy have been reviewed. SERS spectra of species adsorbed on the iron surface can be measured by using an activated silver electrode completely covered with a thin layer of electrodeposited iron. In-situ SERS studies on inhibition mechanisms of iron corrosion in acid solutions are described in this review.
  • Corrosion Resistance of Dissimilar Welds between Ferritic Stainless Steel with High Corrosion Resistance and Austenitic Stainless Steels

    pp. 273-278

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    Intergranular corrosion susceptibilities of the dissimilar welds between SUS 444 which is ferritic stainless steel with high corrosion resistance and austenitic stainless steels were investigated. Judging from the 10% oxalic acid etch test results, there are some cases where the welded joints between SUS 444 and SUS 304, SUS 316 have high intergranular corrosion susceptibilities, while the welded joints between SUS 444 and SUS 316L have low intergranular corrosion susceptibilities. Intergranular corrosion susceptibility of the welded joints between SUS 444 and SUS 316 decreases when over 30% martensite phase precipitated with the high penetration ratio of SUS 316. Intergranular corrosion of the dissimilar welds between high purity SUS 444 and austenitic stainless steels is caused by the formation of chromium depleted zone. The countermeasures for the intergranular corrosion of the dissimilar welds are that the martensite phase with high solubility of carbon and nitrogen is forced to precipitate by increasing the penetration ratio of SUS 316 or SUS 316L is applied for austenitic stainless steel.
  • Anti-fouling of Marine Organisms Adhesion by Zinc Anode

    pp. 279-284

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    The anode samples of rolled and casting zinc plate for use as an anti-fouling panel will be installed on the wall of cooling sea water conduits in coastal steam power station were tested to observe the anti-fouling effects and to find out the suitable anode current density. The results are as follows. The two zinc anodes did not permit easy growth of barnacles in varied current density, if they were succeeded to attach, the easy falling off together with corrosion products such as zinc hydroxides were proceeded. The suitable anode current density for anti-fouling on a long term basis is found to be less than 30mA/m2. The anti-fouling mechanism of zinc anodes depends primarily on the physical effect of the corrosion products film which is soft, fragile and unstable. And also biological effect, that is, a film formed by soft organisms such as attaching diatoms and Botylloides sp. on the corrosion products inhibited to growth of calcareous depositing organisms. In view of the fact that organisms adhered to the surface of the anodes were alive and fell off together with corrosion products, it is very unlikely that the anti-fouling effect is dependent on the zinc biocide.
  • Mechanism of Potential Ennoblement for Stainless Steel in Natural Seawater

    pp. 285-291

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    Potential ennoblement for stainless steel in natural seawater was analyzed. Open circuit potentials (OCPs) of platinum, gold, palladium, chromium, titanium and nickel ennobled in natural seawater as well as stainless steel, SUS 304 (18Cr-8Ni). Potential ennoblement is not a specific event to only stainless steel. Marine biofilm clearly caused potential ennoblement. Cathodic polarization curves for the ennobled stainless steel elucidated that there were two distinct reduction current increases. One is the limited diffusion current of dissolved oxygen reduction below -500mV vs. Ag/AgCl (KClsat). The other reduction current around 0mV vs. Ag/AgCl (KClsat) was considered to be hydrogen peroxide reduction current in acidic condition. Synergistic effect of hydrogen peroxide and low pH in artificial seawater carried out high OCP of stainless steel like that in natural seawater. Therefore, we concluded that synergistic effect of hydrogen peroxide production and low pH by marine microorganisms is possible cause for potential ennoblement in natural seawater.
  • Revision of pCl-pH Diagram of Zn-Cl--H2O System

    pp. 292-293

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up
    It is important for those concerned with zinc to know what corrosion form of zinc takes in various environments. A pCl-pH diagram for Zn-Cl--H2O system is usually used as an index of corrosion form of zinc in an arbitrary chloride environment.
    In this report, the mistake of Zn-Cl--H2O system pCl-pH diagram which had been widely used after 1950's was pointed out and revised. The drawing method which used the solubility product of the corrosion products of zinc in this was shown.

Article Access Ranking

12 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. Development Technology for Prevention of Macro-segregation in Casting of Steel Ingot by Insert Casting in Vacuum Atmosphere ISIJ International Advance Publication
  5. 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
  6. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire ISIJ International Advance Publication
  7. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  8. Structural and Mechanical Characterizations of Top Dross in a Molten Zinc Bath ISIJ International Vol.61(2021), No.3
  9. Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification ISIJ International Vol.61(2021), No.3
  10. Crystal Structure Analysis of Top Dross in Molten Zinc Bath by First Principles Calculation and Synchrotron X-ray Diffraction ISIJ International Vol.61(2021), No.3

Search Phrase Ranking

12 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. slag
  4. tetsu-to-hagané
  5. blast furnace productivity
  6. effects of coiling temperature on microstructure and precipitation behavior in
  7. fundamental study on rapid reduction of chromium ore in basic oxygen furnace
  8. iron phosphide (fe2p, fe3p)
  9. iron phosphide (fe2p, fe3p), formation energy
  10. k.sasai and y. mizukami: refractories (taikabutsu), 53 (2001), 56.