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Zairyo-to-Kankyo
Vol. 68 (2019), No. 12

Zairyo-to-Kankyo Vol. 68 (2019), No. 12

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

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Zairyo-to-Kankyo Vol. 68 (2019), No. 12

Difficulty in Troubleshooting

Kazuharu Sobue

pp. 331-332

DOI:

10.3323/jcorr.68.331

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Article Title

Difficulty in Troubleshooting

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Ris

Evaluation of Relationship between Corrosion Thickness Reduction and Propagation Mode of AE Wave

Takuya Kurihara, Takuma Kagami, Matsuo Takuma, Taro Kono, Naoto Nakasato

pp. 342-346

DOI:

10.3323/jcorr.68.342

Abstract

Corrosion loss evaluation method for steel structure was investigated by acoustic emission （AE） signals with characteristics of Lamb wave. Relationship between wavelet coefficient of S₀ mode of Lamb wave AE signals and AE source depth were evaluated. The amplitude of the S₀ mode becomes higher as the AE source become closer to the thickness center. Thus, the corrosion depth can be evaluated by the strength ratio of S₀ mode and A₀ mode of Lamb wave AE signals.

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Article Title

Evaluation of Relationship between Corrosion Thickness Reduction and Propagation Mode of AE Wave

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Observation of Pit Initiation and Growth of Stainless Steel under a Chloride Solution Droplet―Effect of S Content on Pit Initiation, Growth and Repassivation―

Azusa Ooi, Yaoki Ise, Eiji Tada, Atsushi Nishikata

pp. 347-354

DOI:

10.3323/jcorr.68.347

Abstract

A system that can stop pit growth automatically at any time after the pit initiation under a chloride solution droplet was developed. Using this system, atmospheric pitting corrosion of austenitic stainless steels with various sulfur （S） concentrations was investigated. It was confirmed that initiation site of pitting corrosion was manganese sulfide （MnS） inclusions under the droplets regardless of S concentrations. In addition, the growth behavior of the active dissolution area doesn't also depend on S concentrations. When these specimens were subjected to wet-dry cycle tests, probability of pitting corrosion increases with S concentrations due to increasing initiation site, and there is no clear difference in chloride concentrations for onset of the pitting corrosion. On the other hand, repassivation behavior is strongly depends on S concentrations.

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Article Title

Observation of Pit Initiation and Growth of Stainless Steel under a Chloride Solution Droplet―Effect of S Content on Pit Initiation, Growth and Repassivation―

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Ris

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Connecting the Dots

Zairyo-to-Kankyo Vol.74(2025), No.11

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Zairyo-to-Kankyo Vol. 68 (2019), No. 12

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. 68 (2019), No. 12

Difficulty in Troubleshooting

Share it with SNS

Evaluation of Relationship between Corrosion Thickness Reduction and Propagation Mode of AE Wave

Share it with SNS

Observation of Pit Initiation and Growth of Stainless Steel under a Chloride Solution Droplet―Effect of S Content on Pit Initiation, Growth and Repassivation―

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. 68 (2019), No. 12

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. 68 (2019), No. 12

Difficulty in Troubleshooting

Share it with SNS

Evaluation of Relationship between Corrosion Thickness Reduction and Propagation Mode of AE Wave

Share it with SNS

Observation of Pit Initiation and Growth of Stainless Steel under a Chloride Solution Droplet―Effect of S Content on Pit Initiation, Growth and Repassivation―

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