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Zairyo-to-Kankyo
Vol. 69 (2020), No. 1

Zairyo-to-Kankyo Vol. 69 (2020), No. 1

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

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Zairyo-to-Kankyo Vol. 69 (2020), No. 1

Joint Research Committee

Hiroshi Kawakami

pp. 1-2

DOI:

10.3323/jcorr.69.1

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Article Title

Joint Research Committee

Bibtex

Ris

Analysis on the Growth Mechanism of Corrosion Products of Copper Materials Containing Brass by Voltammetry

Shigeyoshi Nakayama, Aiko Tominaga, Hiroyuki Fujioka, Takenori Notoya, Toshiyuki Osakai

pp. 10-16

DOI:

10.3323/jcorr.69.10

Abstract

Corrosion products on the brass surface were characterized by voltammetry with a high alkaline electrolyte solution （6 M KOH＋1 M LiOH）. In addition to copper oxides （Cu₂O and CuO）, zinc oxide （ZnO） was also confirmed on corroded brass surfaces. Depending on corrosion conditions, the amounts of the respective oxides formed on brass surfaces were varied. In the corrosion test in which brass is immersed in a NaCl solution （by assuming dezincification corrosion）, Cu₂O was selectively formed, and then grew significantly in NaCl solution at the concentration of 0.1％ or less. However, when the concentration exceeded 1％, the formation of ZnO was newly confirmed. It was suggested that the formation and growth behaviors of the oxides on brass should be affected by the diffusion rate of zinc dependent on the concentration of NaCl solution.

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Analysis on the Growth Mechanism of Corrosion Products of Copper Materials Containing Brass by Voltammetry

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Effect of Deposits on Corrosion of Copper Tubes in a Circulating Cooling Water System

Hidefumi Yamanaka, Tomoyuki Nagai, Hidemasa Nonaka, Hiroaki Tsuchiya, Shinji Fujimoto

pp. 17-25

DOI:

10.3323/jcorr.69.17

Abstract

In the present study, possible effect of deposits on the corrosion of copper pipes in concentrated cooling water has been examined. It was considered that during the localized corrosion of copper pipes, the cathodic process took place on the intact sites of carbonaceous films, whereas the anodic process occurred on their defective sites. The deposits covering the defects of carbonaceous films significantly affected the corrosion of copper pipes. In particular, the presence of iron rust strongly enhanced the anodic reaction, resulting in severe corrosion. The enhanced anodic reaction was attributed to the suppressed formation of a protective oxide film most likely due to the lower pH of the areas located beneath the iron rust. It was suggested that the pretreatment to form a protective copper oxide film onto the copper pipe surface inhibited the corrosion process beneath the iron rust deposit.

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Effect of Deposits on Corrosion of Copper Tubes in a Circulating Cooling Water System

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Zairyo-to-Kankyo Vol. 69 (2020), No. 1

Keyword Ranking

hot dip aluminising

blast furnace

加炭

desulpherization caf2

olac

shear stress distribution

statistical features of complex systems

statistical features of complex systems kuninaka

ushio

トーピード

Zairyo-to-Kankyo Vol. 69 (2020), No. 1

Joint Research Committee

Share it with SNS

Analysis on the Growth Mechanism of Corrosion Products of Copper Materials Containing Brass by Voltammetry

Share it with SNS

Effect of Deposits on Corrosion of Copper Tubes in a Circulating Cooling Water System

Share it with SNS

Article Access Ranking

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

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

Effect of BN surface segregation on coatability in hot-dip galvanizing of B-added steel

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

Factors affecting generation of iron fines in cold sheet rolling of steel

Effect of Deoxidizer Addition Sequence on Cleanliness of Al-killed and S-containing Steel: Industrial Trials and Thermodynamic Analysis

First-principles estimation of effect of solute atoms on hydrogen penetration from (100) surface in alpha iron: a rudimentary study of inhibitor elements

Progress of Hot Metal Treatment Technology and Future Outlook

Surface Cracking in Hot Rolling Process of Cu Bearing Steel Bar

Integrated Steelworks that Reduce CO₂ Emissions by More Than 80% — Challenge for Carbon-Neutral Integrated Steelworks —

Advanced Search

Zairyo-to-Kankyo Vol. 69 (2020), No. 1

Keyword Ranking

hot dip aluminising

blast furnace

加炭

desulpherization caf2

olac

shear stress distribution

statistical features of complex systems

statistical features of complex systems kuninaka

ushio

トーピード

Zairyo-to-Kankyo Vol. 69 (2020), No. 1

Joint Research Committee

Share it with SNS

Analysis on the Growth Mechanism of Corrosion Products of Copper Materials Containing Brass by Voltammetry

Share it with SNS

Effect of Deposits on Corrosion of Copper Tubes in a Circulating Cooling Water System

Share it with SNS

Article Access Ranking

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

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

Effect of BN surface segregation on coatability in hot-dip galvanizing of B-added steel

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

Factors affecting generation of iron fines in cold sheet rolling of steel

Effect of Deoxidizer Addition Sequence on Cleanliness of Al-killed and S-containing Steel: Industrial Trials and Thermodynamic Analysis

First-principles estimation of effect of solute atoms on hydrogen penetration from (100) surface in alpha iron: a rudimentary study of inhibitor elements

Progress of Hot Metal Treatment Technology and Future Outlook

Surface Cracking in Hot Rolling Process of Cu Bearing Steel Bar

Integrated Steelworks that Reduce CO2 Emissions by More Than 80% — Challenge for Carbon-Neutral Integrated Steelworks —

Advanced Search

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

Integrated Steelworks that Reduce CO₂ Emissions by More Than 80% — Challenge for Carbon-Neutral Integrated Steelworks —