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材料と環境
Vol. 58 (2009), No. 10

材料と環境 Vol. 58 (2009), No. 10

オンライン版ISSN:	1881-9664
冊子版ISSN:	0917-0480
発行機関:	Japan Society of Corrosion Engineering

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キーワードランキング

02 Apr. (Last 30 Days)

材料と環境 Vol. 58 (2009), No. 10

情報ハブとしての腐食防食協会

安住和久

pp. 345-345

DOI:

10.3323/jcorr.58.345

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情報ハブとしての腐食防食協会

Bibtex

Ris

高温におけるCr及びCr酸化物とNaClとの反応

平出信彦, 宗野達久, 梶村治彦

pp. 348-355

DOI:

10.3323/jcorr.58.348

抄録

Reaction of Cr and Cr₂O₃ with NaCl were investigated in air at 673-973 K. In the presence of NaCl, mass gain of Cr was remarkably accelerated. Na₂CrO₄ and Cl₂ were produced during heating Cr₂O₃ with NaCl. Na₂CrO₄, Cl₂, CrCl₂, CrCl₃, and Cr₂O₃ were produced when Cr was heated with NaCl. Na₂CrO₄ and Cl₂ were produced by the reaction of Cr with NaCl and O₂. CrCl₂ and CrCl₃ were produced by the reaction of Cr with Cl₂. Na₂CrO₄, CrCl₂ and CrCl₃ accelerated the oxidation of Cr.

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高温におけるCr及びCr酸化物とNaClとの反応

Bibtex

Ris

コンクリート中への尿酸添加による鋼管材料のコンクリート/土壌系マクロセル腐食抑制手法の検討

中山紀夫, 朝倉祝治

pp. 356-362

DOI:

10.3323/jcorr.58.356

抄録

Severe localized corrosion of steel pipes, buried in concrete/soil systems (known as macro-cell corrosion), is induced by cathodic reactions on those steel surfaces that are located in the concrete, accompanied by anodic reactions (i.e., corrosion) on those surfaces that are located in the soil. The addition of cathodic inhibitors to the concrete, in the form of cement admixtures, is therefore expected to be an effective means of suppressing this phenomenon. Concrete test specimens (ordinary Portland cement; water/cement ratio: 61%), containing uric acid as the inhibitor have been formulated and the inhibitory effect of uric acid on the macro-cell corrosion has been examined by the measurement, over 862 days, of the currents flowing between the steel (SGP) pipes embedded in the concrete test specimens and those buried in soil. Dry mixing of 10% uric acid by weight was shown to decrease the currents, which indicates that macro-cell corrosion can be effectively controlled by uric acid. Addition of 0.3 or 3% uric acid was ineffective. This tendency was also supported by the results of weight-loss measurements of steel pipes buried in soil. The inhibitory effect becomes more predominant as the measurement time increases (inhibition efficiencies: 64% for 0-862 days, 78-91% for 297-862 days).

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コンクリート中への尿酸添加による鋼管材料のコンクリート/土壌系マクロセル腐食抑制手法の検討

Bibtex

Ris

論文アクセスランキング

02 Apr. (Last 30 Days)

Wettability of CaS Against Molten Iron at 1873 K

ISIJ International Vol.65(2025), No.2
Ag–Sn合金の一方向凝固実験による包晶凝固の解析

鉄と鋼早期公開
Perspectives on the Promising Pathways to Zero Carbon Emissions in the Steel Industry toward 2050

ISIJ International Vol.65(2025), No.2
Thermodynamic Calculation of Grain Boundary Composition in Ferritic Steels and Its Application for Controlling the Hall–Petch Coefficient

ISIJ International 早期公開
Hydrogen-induced vacancy formation process in austenitic stainless steel 304

ISIJ International 早期公開
STEM-EDSおよび3DAPによる多成分系カルシウムフェライトの還元組織観察

鉄と鋼早期公開
Effects of interface anisotropy on the solidification morphology of zinc alloys and development of data assimilation for their estimation

ISIJ International 早期公開
Chemical State Evolution of Iron Ore Sinter Investigated by Wide-Area Imaging XAFS

ISIJ International 早期公開
PREFACE

MATERIALS TRANSACTIONS Vol.54(2013), No.6
Bend Failure Mechanism of Zinc Coated Advanced High Strength Steel

ISIJ International Vol.58(2018), No.8

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材料と環境 Vol. 58 (2009), No. 10

キーワードランキング

blast furnace

ferrocoke

high-strength steel alloys

isij international

slag/metal reactions in steelmaking

tramp elements

trip steel martensitic transformation

bend

continuous casting slab

crystallization

材料と環境 Vol. 58 (2009), No. 10

情報ハブとしての腐食防食協会

SNSによる共有

高温におけるCr及びCr酸化物とNaClとの反応

SNSによる共有

コンクリート中への尿酸添加による鋼管材料のコンクリート/土壌系マクロセル腐食抑制手法の検討

SNSによる共有

論文アクセスランキング

Wettability of CaS Against Molten Iron at 1873 K

Ag–Sn合金の一方向凝固実験による包晶凝固の解析

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

Thermodynamic Calculation of Grain Boundary Composition in Ferritic Steels and Its Application for Controlling the Hall–Petch Coefficient

Hydrogen-induced vacancy formation process in austenitic stainless steel 304

STEM-EDSおよび3DAPによる多成分系カルシウムフェライトの還元組織観察

Effects of interface anisotropy on the solidification morphology of zinc alloys and development of data assimilation for their estimation

Chemical State Evolution of Iron Ore Sinter Investigated by Wide-Area Imaging XAFS

PREFACE

Bend Failure Mechanism of Zinc Coated Advanced High Strength Steel

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