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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

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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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Article Title

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

blast furnace

thermo dynamics and kinetics of coal gasification in a liquid iron bath

improvement in mechanical properties of a high-strength hot-rolled automobile steel

effect of {110} < 229 >

isij international vol. 61 (2021)

k. sawada

machine learning

maruyama k, sawada k, koike j i. strengthening mechanisms of creep resistant tempered martensitic steel

possible relationship between energy dissipation and agitation in steel processing operations.

segeregation prevention orebedding

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

Wettability of CaS Against Molten Iron at 1873 K

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

Effects of High Magnetic Field on Microstructure and Mechanical Property of Medium Mn Steels Tempered at Low-Temperature after Deep Cryogenic Treatment

Progress in modelling microstructural evolution and changes of mechanical properties for hot rolled steels -the path from semi-empirical through machine learning to industrial foundation models

Ammonia as a Green Energy Carrier to Lower Blast Furnace CO₂ Emissions

日本鉄鋼協会第113回講演大会講演概要集(I) その4

Crater End Detection in Continuous Casting by Longitudinal and Shear Wave Hybrid Technique with High Sensitivity EMAT

Solidification Characteristics and TiC Formation Behaviour in Alloy 800H

High temperature zinc vapor confinement in snout by using wind curtain

日本鉄鋼協会第113回講演大会講演概要集(I) その2

Advanced Search

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

Keyword Ranking

blast furnace

thermo dynamics and kinetics of coal gasification in a liquid iron bath

improvement in mechanical properties of a high-strength hot-rolled automobile steel

effect of {110} < 229 >

isij international vol. 61 (2021)

k. sawada

machine learning

maruyama k, sawada k, koike j i. strengthening mechanisms of creep resistant tempered martensitic steel

possible relationship between energy dissipation and agitation in steel processing operations.

segeregation prevention orebedding

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

Wettability of CaS Against Molten Iron at 1873 K

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

Effects of High Magnetic Field on Microstructure and Mechanical Property of Medium Mn Steels Tempered at Low-Temperature after Deep Cryogenic Treatment

Progress in modelling microstructural evolution and changes of mechanical properties for hot rolled steels -the path from semi-empirical through machine learning to industrial foundation models

Ammonia as a Green Energy Carrier to Lower Blast Furnace CO2 Emissions

日本鉄鋼協会第113回講演大会 講演概要集(I) その4

Crater End Detection in Continuous Casting by Longitudinal and Shear Wave Hybrid Technique with High Sensitivity EMAT

Solidification Characteristics and TiC Formation Behaviour in Alloy 800H

High temperature zinc vapor confinement in snout by using wind curtain

日本鉄鋼協会第113回講演大会 講演概要集(I) その2

Advanced Search

Ammonia as a Green Energy Carrier to Lower Blast Furnace CO₂ Emissions

日本鉄鋼協会第113回講演大会講演概要集(I) その4

日本鉄鋼協会第113回講演大会講演概要集(I) その2