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

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isij international, vol. 45, no. 2

blast furnace

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ladle steel making

martensi deformation

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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

Growth, Removal, and Agglomeration of Various Type of Oxide Inclusions in Molten Steel

Copper removal of liquid steel containing 0.25 % carbon using Fe₂O₃-CaCl₂-SiO₂ flux

Finite Element Analysis of Bubble Growth and Particle Swelling during Coal Pyrolysis

Corrosion Behavior of Carbon Steel under Soil Drying Conditions

Cold Spot Joining of 980 MPa-class Ultra-high Strength Steel

Factors Affecting Generation of Iron Fines in Cold Sheet Rolling of Steel

Experimental Study on Heat Transfer Characteristics of a Moving Single-Nozzle Jet Impingement

Combination Effect of Premixing Conditions and Iron Ore Size Distribution in Sintered Ore Granulation Process with Intensive Mixer

Evaluation of Feature Selection Methods for Oxygen Supply Prediction in BOF Steelmaking

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

Keyword Ranking

abc123

isij international, vol. 45, no. 2

blast furnace

ctod

ferro-coke

tetsu-to-hagane

ladle steel making

martensi deformation

watanabe toru

ataru uchida

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

Growth, Removal, and Agglomeration of Various Type of Oxide Inclusions in Molten Steel

Copper removal of liquid steel containing 0.25 % carbon using Fe2O3-CaCl2-SiO2 flux

Finite Element Analysis of Bubble Growth and Particle Swelling during Coal Pyrolysis

Corrosion Behavior of Carbon Steel under Soil Drying Conditions

Cold Spot Joining of 980 MPa-class Ultra-high Strength Steel

Factors Affecting Generation of Iron Fines in Cold Sheet Rolling of Steel

Experimental Study on Heat Transfer Characteristics of a Moving Single-Nozzle Jet Impingement

Combination Effect of Premixing Conditions and Iron Ore Size Distribution in Sintered Ore Granulation Process with Intensive Mixer

Evaluation of Feature Selection Methods for Oxygen Supply Prediction in BOF Steelmaking

Advanced Search

Copper removal of liquid steel containing 0.25 % carbon using Fe₂O₃-CaCl₂-SiO₂ flux