- TOP
- Zairyo-to-Kankyo
- Vol. 62 (2013), No. 4
Zairyo-to-Kankyo Vol. 62 (2013), No. 4
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
20 Mar. (Last 30 Days)
Zairyo-to-Kankyo Vol. 62 (2013), No. 4
Effect of Trace Amounts of Salts on Properties of Passive Films Formed on SUS 304 Stainless Steel under Atmospheric Environment
Rock-Hoon Jung, Hiroaki Tsuchiya, Shinji Fujimoto
pp. 148-152
DOI:
10.3323/jcorr.62.148Abstract
Passive films formed on SUS304 stainless steel that were covered with thin water layer containing various kinds of salt and exposed to atmospheric corrosion environment of 90% relative humidity and 60℃ were characterized using X-ray photoelectron spectroscopy (XPS). Thickness and Cr content of passive films were affected by a minute amount of salts provided on the surface as a thin water layer. Thickness of the thin water layer on the surface of the steel seemed to be controlled by the equilibrium relative humidity of saturated solution of chlorides supplied on the specimen. Namely, the thickness of the thin water layer containing chloride with low equilibrium relative humidity was larger compared to that containing the chloride with higher equilibrium relative humidity. As a result, the selective dissolution of Fe is stimulated under the thicker water layer to be the more Cr containing passive films. Chlorides enhanced the formation of more Cr enriched passive films, but more concentrated chloride caused localized corrosion. In particular, passive films formed with the thin water layer containing suitable amount of sodium chloride occasionally exhibited high localized corrosion resistance. Sulfates also accelerated the selective dissolution of Fe and increased Cr content in passive films, resulting in stable growth of passive film without localized corrosion.
鉄筋表面の環境改善を考慮したコンクリート中鉄筋のカソード防食設計
Hiroyuki Kobayashi, Yoshikazu Akira, Toru Yamaji, Hidenori Hamada, Toru Wakabayashi, Noriyasu Mochizuki
pp. 153-160
DOI:
10.3323/jcorr.62.153Abstract
We investigated a cathodic protection design basis for reinforced concrete structures exposed to atmospheric conditions. If such structures in severely corrosive environments do not satisfy the relevant cathodic protection criteria, the situation can be remedied by supplying more current than the design value. However, as such energization results in rapid consumption of the water surrounding the anode, the voltage DC power supply may rise. Using electrochemical measurement and numerical simulation, we sought to clarify the effects resulting from environmental improvement of rebar surfaces using cathodic protection and devised a new design method. Then, via cathodic protection examination using concrete specimens affected by rebar corrosion, the validity of the new design method was determined. The approach was found to be suitable for economical and stable cathodic protection.
Article Access Ranking
20 Mar. (Last 30 Days)
-
Wettability of CaS Against Molten Iron at 1873 K
ISIJ International Vol.65(2025), No.2
-
Mineral Phase Ratio of MEBIOS sinter and its Reducibility under Blast Furnace Condition with High Hydrogen Concentration
ISIJ International Advance Publication
-
Surface defect detection of continuous casting slabs based on deep learning
ISIJ International Advance Publication
-
Analysis of Heat and Mass Transfer for Hydrogen-enriched Direct Reduction Process Based on DEM-CFD
ISIJ International Advance Publication
-
Analysis of Peritectic Solidification of Ag–Sn Alloys by Unidirectional Solidification Experiment
Tetsu-to-Hagané Advance Publication
-
Effect of Cu on Solidification Microstructure and Solidification Process in High Carbon High Speed Steel Type Cast Alloy
ISIJ International Advance Publication
-
Thermodynamic Calculation of Grain Boundary Composition in Ferritic Steels and Its Application for Controlling the Hall–Petch Coefficient
ISIJ International Advance Publication
-
Perspectives on the Promising Pathways to Zero Carbon Emissions in the Steel Industry toward 2050
ISIJ International Vol.65(2025), No.2
-
Process for Phosphorus Recovery from Phosphorus-concentrated Steelmaking Slag and Decreasing Slag Volume
Tetsu-to-Hagané Advance Publication
-
Microstructural analysis of slip mechanisms in friction-type joints using as-coated hot-dip galvanized steel and high-strength bolts
ISIJ International Advance Publication
You can use this feature after you logged into the site.
Please click the button below.