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Zairyo-to-Kankyo
Vol. 61 (2012), No. 6

Zairyo-to-Kankyo Vol. 61 (2012), No. 6

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

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28 Jan. (Last 30 Days)

Zairyo-to-Kankyo Vol. 61 (2012), No. 6

Let's Learn from Biodiversity

Kimio Ito

pp. 235-

DOI:

10.3323/jcorr.61.235

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Let's Learn from Biodiversity

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Ris

Hydrogen Absorption Behavior of Steel Bar for Prestressed Concrete in a Solution of Ammonium Thiocyanate

Tomoki Doshida, Kenichi Takai, Mikiyuki Ichiba

pp. 249-256

DOI:

10.3323/jcorr.61.249

Abstract

A solution of ammonium thiocyanate is used in the FIP (Fédération International de la Précontrainte) test as a hydrogen charging method. Though this method is comparatively simple, fracture time in the FIP test and hydrogen content often differ among various testing institutes. However, the detailed hydrogen absorption behavior in the solution is still not clear. In this context, the effects of existing states of hydrogen, oxide film on the specimen surface, specific solution volume to specimen surface area, immersion time and solution temperature on the hydrogen absorption behavior of a steel bar for reinforcing prestressed concrete were investigated by immersing it in the solution. The amount of absorbed hydrogen increased with immersion time, reached its maximum, and then decreased with increasing immersion time. A main factor of the decrease in the amount of absorbed hydrogen was corrosion products, including Fe, O and S, formed on the specimen surface, since the amount of absorbed hydrogen increased again as a result of merely polishing the surface. This indicates that corrosion products formed on immersing specimens in a solution of ammonium thiocyanate strongly affect hydrogen absorption behavior. Whereas, variation of the solution, such as increase in pH, during immersion also affects slightly hydrogen absorption behavior.

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Zairyo-to-Kankyo Vol. 61 (2012), No. 6

Keyword Ranking

electro-magnetic stirring

galvanizing

young's modulus of iron-based particle reinforced composites

mechanism of formation of microstructure in low-hardenabilin zone in weld heat affected zone',

pmsm

氧枪

12ni

1970, 56: 371

aging slag

galvalume

Zairyo-to-Kankyo Vol. 61 (2012), No. 6

Let's Learn from Biodiversity

Share it with SNS

Hydrogen Absorption Behavior of Steel Bar for Prestressed Concrete in a Solution of Ammonium Thiocyanate

Share it with SNS

Article Access Ranking

Perspectives on the Promising Pathways to Zero Carbon Emissions in the Steel Industry toward 2050

New Electromagnetic Flow Control System for Optimization of Molten Steel Flow in Continuous Casting Mold

Delayed Fracture Mechanism of 1700 MPa-Class Quenched and Tempered Bolt under Atmospheric Corrosion Environment

Processability and Microstructural Morphology of γ-Fe/Fe₂Nb Two-Phase Eutectic Alloy Manufactured by Laser Powder Bed Fusion

Effect of B on Surface Oxidation Behavior and Phosphatability of Si–Mn-added Cold-Rolled Steel Sheets

Morphology Control of Metallic Iron Formed by Hydrogen Reduction of Iron Oxide

Effect of Cu Addition on Mechanical Properties of Tempered Martensitic Steels: Retardation of Fatigue Crack Initiation by Cu Precipitation

Reducibility of iron ore sinter analogues under hydrogen-enriched and conventional blast furnace gas compositions

Preface to the Special Issue on "Effects of Cu and Other Tramp Elements on Steel Properties"

Connecting the Dots

Advanced Search

Zairyo-to-Kankyo Vol. 61 (2012), No. 6

Keyword Ranking

electro-magnetic stirring

galvanizing

young's modulus of iron-based particle reinforced composites

mechanism of formation of microstructure in low-hardenabilin zone in weld heat affected zone',

pmsm

氧枪

12ni

1970, 56: 371

aging slag

galvalume

Zairyo-to-Kankyo Vol. 61 (2012), No. 6

Let's Learn from Biodiversity

Share it with SNS

Hydrogen Absorption Behavior of Steel Bar for Prestressed Concrete in a Solution of Ammonium Thiocyanate

Share it with SNS

Article Access Ranking

Perspectives on the Promising Pathways to Zero Carbon Emissions in the Steel Industry toward 2050

New Electromagnetic Flow Control System for Optimization of Molten Steel Flow in Continuous Casting Mold

Delayed Fracture Mechanism of 1700 MPa-Class Quenched and Tempered Bolt under Atmospheric Corrosion Environment

Processability and Microstructural Morphology of γ-Fe/Fe2Nb Two-Phase Eutectic Alloy Manufactured by Laser Powder Bed Fusion

Effect of B on Surface Oxidation Behavior and Phosphatability of Si–Mn-added Cold-Rolled Steel Sheets

Morphology Control of Metallic Iron Formed by Hydrogen Reduction of Iron Oxide

Effect of Cu Addition on Mechanical Properties of Tempered Martensitic Steels: Retardation of Fatigue Crack Initiation by Cu Precipitation

Reducibility of iron ore sinter analogues under hydrogen-enriched and conventional blast furnace gas compositions

Preface to the Special Issue on "Effects of Cu and Other Tramp Elements on Steel Properties"

Connecting the Dots

Advanced Search

Processability and Microstructural Morphology of γ-Fe/Fe₂Nb Two-Phase Eutectic Alloy Manufactured by Laser Powder Bed Fusion