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Zairyo-to-Kankyo
Vol. 66 (2017), No. 2

Zairyo-to-Kankyo Vol. 66 (2017), No. 2

ONLINE ISSN:	1881-9664
PRINT ISSN:	0917-0480
Publisher:	Japan Society of Corrosion Engineering

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Vol. 72 (2023)
Vol. 71 (2022)
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Vol. 67 (2018)
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Vol. 66 (2017)
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29 May. (Last 30 Days)

Zairyo-to-Kankyo Vol. 66 (2017), No. 2

Getting over the Existing Image

Masayuki Sagara

pp. 47-48

DOI:

10.3323/jcorr.66.47

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Article Title

Getting over the Existing Image

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Development of Artificial Rainfall Equipment for Studying the Effect of Rain on the Corrosion Behaviors

Dara To, Tadashi Shinohara, Osamu Umezawa

pp. 58-61

DOI:

10.3323/jcorr.66.58

Abstract

Atmospheric corrosion is an electrochemical process which can only proceed in the presence of an electrolyte film. Rain is one of the main factors in initiating the time of wetness and transporting the chemical substance from the atmosphere to metal surface that guide to accelerate the corrosion attack. In this case study, an artificial rainfall equipment was developed with the aim of defining the behaviors of atmospheric corrosion which is affected by rain and chemical species. The Atmospheric Corrosion Monitoring （ACM） sensor which consists of a Fe-Ag couple was used to measure the corrosivity of the rainfall solution by finding the relation between the Corrosion Rate （CR） and the sensor output. The controllable precipitation rate and its distribution facilitate in investigating the effect of rainfall on the corrosion behaviors. The relation between the sensors output and CR enable to predict the corrosivity of the atmosphere. Thus, the developed artificial rainfall equipment is an essential and reliable tool for studying the corrosion behaviors under the effect of rain.

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Development of Artificial Rainfall Equipment for Studying the Effect of Rain on the Corrosion Behaviors

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Analysis of Water Chemistry Change Behavior of the Spent Fuel Pool Due to the Injection of Sea Water and/or Fresh Water to the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company

Masayoshi Ozawa, Masatsune Akashi

pp. 62-70

DOI:

10.3323/jcorr.66.62

Abstract

Concentration of SO₄^2－ and HCO₃^－ which affect to corrosion for carbon steels were estimated by analysis using pH, Cl^－ concentration and electrical conductivity κ, in the spent fuel pools （SFP） of Fukushima Daiichi Nuclear Power Station （1F） in which sea water and/or fresh water were injected. Electrical conductivity κ in the SFP of 1F Unit 1 in which fresh water was injected, were presumed accurately by analysis using observed Cl^－ concentration, concentration of SO₄^2－ and HCO₃^－ which were estimated. The pH measurements exceeded the estimate in 1F Units 2 and 3 where sea water was injected. Each of dissolution reaction of iron, dissociation of H₄N₂, and the production of ammonia by the decomposition of H₄N₂ has been evaluated as not the cause of the high pH by itself. It was estimated that the calcium ions from the concrete debris had been continuously supplied to water in SFP of the unit 3 during purification treatment period. It was evaluated that self-passivation conditions of carbon steel were achieved in the water chemistry after the purification process completed for the Fukushima Daiichi Nuclear Power Station of Units 2 to 4. In addition, it was evaluated that self-passivation of carbon steel was achieved in the environment of unit 1.

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Article Title

Analysis of Water Chemistry Change Behavior of the Spent Fuel Pool Due to the Injection of Sea Water and/or Fresh Water to the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company

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Ris

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Low Density Fe–Mn–Al–C Steels: Phase Structures, Mechanisms and Properties

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Optimization and Improvement of the Projection Welding of Nut Based on Regression Analysis

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Zairyo-to-Kankyo Vol. 66 (2017), No. 2

Search Phrase Ranking

welding

steel

tundish

osamu

powder injection

asahi higashiyama sogo ueno

carbon deposit

electromagnetic stirring

hydrogen trapping vc

isji

Zairyo-to-Kankyo Vol. 66 (2017), No. 2

Getting over the Existing Image

Share it with SNS

Development of Artificial Rainfall Equipment for Studying the Effect of Rain on the Corrosion Behaviors

Share it with SNS

Analysis of Water Chemistry Change Behavior of the Spent Fuel Pool Due to the Injection of Sea Water and/or Fresh Water to the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company

Share it with SNS

Article Access Ranking

Automatic Ultrasonic Testing of Non-metallic Inclusions Detectable with Size of Several Tens of Micrometers Using a Double Probe Technique along the Longitudinal Axis of a Small-diameter Bar

A three dimensional real-time heat transfer model for continuous casting blooms

Heterogeneous Chemical State of Carbon in Fe-C Binary Alloys

Effect of Parallel Granulation with Inclined Mixing of Limestone on Melt and Assimilation Behavior

日本鉄鋼協会第91回講演大会講演大要

Low Density Fe–Mn–Al–C Steels: Phase Structures, Mechanisms and Properties

Effects of Liquidus Temperature and Liquid Amount on the Fluidity of Bonding Phase and Strength of Sinter

Torque Model in Plate Rolling Process with Biting Impact Considered

Optimization and Improvement of the Projection Welding of Nut Based on Regression Analysis

Microwave-hydrogen synergistic reduction of vanadium titano-magnetite

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