- TOP
- Zairyo-to-Kankyo
- Vol. 69 (2020), No. 5
Zairyo-to-Kankyo Vol. 69 (2020), No. 5
Backnumber
-
Vol. 74 (2025)
-
Vol. 73 (2024)
-
Vol. 72 (2023)
-
Vol. 71 (2022)
-
Vol. 70 (2021)
-
Vol. 69 (2020)
-
Vol. 68 (2019)
-
Vol. 67 (2018)
-
Vol. 66 (2017)
-
Vol. 65 (2016)
-
Vol. 64 (2015)
-
Vol. 63 (2014)
-
Vol. 62 (2013)
-
Vol. 61 (2012)
-
Vol. 60 (2011)
-
Vol. 59 (2010)
-
Vol. 58 (2009)
-
Vol. 57 (2008)
-
Vol. 56 (2007)
-
Vol. 55 (2006)
-
Vol. 54 (2005)
-
Vol. 53 (2004)
-
Vol. 52 (2003)
-
Vol. 51 (2002)
-
Vol. 50 (2001)
-
Vol. 49 (2000)
-
Vol. 48 (1999)
-
Vol. 47 (1998)
-
Vol. 46 (1997)
-
Vol. 45 (1996)
-
Vol. 44 (1995)
-
Vol. 43 (1994)
-
Vol. 42 (1993)
-
Vol. 41 (1992)
-
Vol. 40 (1991)
Keyword Ranking
12 Jul. (Last 30 Days)
Zairyo-to-Kankyo Vol. 69 (2020), No. 5
Effect of Ligand Field on Cations Forming Complexes and the HSAB Principle
Kunitsugu Aramaki
pp. 137-139
DOI:
10.3323/jcorr.69.137Abstract
Effect of ligand field on cation forming complexes with precipitation inhibitors for metallic corrosion in aerated neutral solution are discussed based on the hard and soft acids and bases (HSAB) principle. The energy levels of three 3d orbitals, dxy, dxz and dyz in Fe3+, for example, decrease and two orbitals, dx2-y2 and dz2 increase markedly by approaching an effective ligand, :CN-, resulting in the formation of d2sp3 hybrid orbital. Contrary, less effective ligand like :NH3 provides sp3d2 hybrid orbital. Because chelating agents enhance the ligand field effect markedly, the d2sp3 hybrid orbital of Fe3+ can be provided for the formation of chelate compound, resulting in stable coordinate bonds between hard acid and hard base.
Initial Corrosion Behavior of Spheroidal Graphite Cast Iron in Atmospheric Environment
Ichiro Dote, Yuuki Kuwahara, Nobuhiro Kai, Shigenobu Kainuma
pp. 140-147
DOI:
10.3323/jcorr.69.140Abstract
This study focused on the differences in initial corrosion behavior of spheroidal graphite cast iron, carbon steel and weathering steel in atmospheric corrosive environment, the atmospheric exposure test and dry/wet cyclic test were conducted to examine the effect of graphite and Cu of spheroidal graphite cast iron on its initial corrosion behavior. After exposure to the atmosphere for two years, the mean corrosion depth of spheroidal graphite cast iron is smaller than that of carbon steel and similar to that of weathering steel, whereas the initial corrosion of spheroidal graphite cast iron progresses earlier than carbon steel and weathering steel, regardless of the temperature, humidity, and the amount of sea salt. From the initial corrosion test results in the wet-dry cyclic test, that Cu precipitation was observed at the corrosion origin of the spheroidal graphite cast iron, which is same as that in weathering steel. Based on the findings obtained in this study, a schematic diagram of the initial corrosion mechanism of spheroidal graphite cast iron was speculated.
Structure of Corrosion Product Formed on Carbon Steel Covered with NiSO4-added Resin Coating under Sulfuric Acid Mist Environment Containing Chloride
Shota Hayashida, Masamitsu Takahashi, Hiroshi Deguchi, Hiroaki Tsuchiya, Koushu Hanaki, Masato Yamashita, Shinji Fujimoto
pp. 148-153
DOI:
10.3323/jcorr.69.148Abstract
Corrosion resistance of carbon steel covered with resin coating containing nickel sulfate has been evaluated under chloride and sulfuric acid mist environment. The structure of corrosion products formed on steel surface was investigated by XRD and XAFS analyses using synchrotron radiation. Nickel sulfate promoted the formation of goethite and akaganeite. It was considered that this akaganeite was not tetragonal β-FeOOH but monoclinic akaganeite containing nickel.
Article Access Ranking
12 Jul. (Last 30 Days)
-
Perspectives on the Promising Pathways to Zero Carbon Emissions in the Steel Industry toward 2050
ISIJ International Vol.65(2025), No.2
-
Wettability of CaS Against Molten Iron at 1873 K
ISIJ International Vol.65(2025), No.2
-
Integrated Steelworks that Reduce CO2 Emissions by More Than 80% — Challenge for Carbon-Neutral Integrated Steelworks —
Tetsu-to-Hagané Advance Publication
-
Factors affecting generation of iron fines in cold sheet rolling of steel
ISIJ International Advance Publication
-
Effect of BN surface segregation on coatability in hot-dip galvanizing of B-added steel
ISIJ International Advance Publication
-
Effects of alloying-element addition on hydrogen diffusion and hydrogen absorption in Ni
ISIJ International Advance Publication
-
New Electromagnetic Flow Control System for Optimization of Molten Steel Flow in Continuous Casting Mold
ISIJ International Advance Publication
-
Micromechanical characterization of nano-bainite steel
ISIJ International Advance Publication
-
Experimental Study on Heat Transfer Characteristics of a Moving Single-Nozzle Jet Impingement
ISIJ International Advance Publication
-
Surface Cracking in Hot Rolling Process of Cu Bearing Steel Bar
Tetsu-to-Hagané Vol.111(2025), No.5
You can use this feature after you logged into the site.
Please click the button below.