Menu
Search
Filters
Close
Menu

07243 Localized Corrosion Susceptibility of Cu-Ni Alloys in Chloride Containing Environments

Picture for 07243 Localized Corrosion Susceptibility of Cu-Ni Alloys in Chloride Containing Environments
Available for download
Product Number: 51300-07243-SG
ISBN: 07243 2007 CP
Author: Marta Andrea Jakab, Narasi Sridhar, and Andrzej M. Anderko
Publication Date: 2007
$0.00
$20.00
$20.00
Under alkaline conditions, copper-nickel alloys are covered by passive oxide films containing Cu and Ni oxides. In chloride ion containing environments, they are therefore susceptible to localized corrosion. In this paper, the susceptibility of selected Cu-Ni alloys (UNS C70600, UNS C71500 and UNS N04400) to localized corrosion was investigated by measuring the crevice stabilization and repassivation potentials (Ecrev and Ercrev, respectively) in alkaline sodium chloride solutions. Correlations between environmental variables, such as chloride ion concentration, pH and temperature and Ecrev, as well as Ercrev were established. It was found that: (i) Ecrev and Ercrev decrease with increasing chloride ion concentration; (ii) there is a linear relationship between Ecrev and Ercrev and the logarithm of chloride ion concentration; (iii) Ercrev does not depend on the solution pH; (iv) there is a complex relationship between Ecrev and Ercrev and the alloy composition as well as the temperature. The electrochemical properties of the selected alloys were also investigated in synthetic seawater with and without the presence of free chlorine. It was found that the pitting and repassivation potentials in synthetic seawater are strongly dependent on the alloy composition. The presence of free chlorine did not significantly affect the cathodic reaction kinetics. It, however, increased the corrosion potential and changed the corrosion morphology.
Under alkaline conditions, copper-nickel alloys are covered by passive oxide films containing Cu and Ni oxides. In chloride ion containing environments, they are therefore susceptible to localized corrosion. In this paper, the susceptibility of selected Cu-Ni alloys (UNS C70600, UNS C71500 and UNS N04400) to localized corrosion was investigated by measuring the crevice stabilization and repassivation potentials (Ecrev and Ercrev, respectively) in alkaline sodium chloride solutions. Correlations between environmental variables, such as chloride ion concentration, pH and temperature and Ecrev, as well as Ercrev were established. It was found that: (i) Ecrev and Ercrev decrease with increasing chloride ion concentration; (ii) there is a linear relationship between Ecrev and Ercrev and the logarithm of chloride ion concentration; (iii) Ercrev does not depend on the solution pH; (iv) there is a complex relationship between Ecrev and Ercrev and the alloy composition as well as the temperature. The electrochemical properties of the selected alloys were also investigated in synthetic seawater with and without the presence of free chlorine. It was found that the pitting and repassivation potentials in synthetic seawater are strongly dependent on the alloy composition. The presence of free chlorine did not significantly affect the cathodic reaction kinetics. It, however, increased the corrosion potential and changed the corrosion morphology.
Product tags
Also Purchased
Picture for 07261 Electrochemical Behavior of Copper-Nickel Alloy CUNI 90/10 in Chlorinated Seawater under Stagn
Available for download

07261 Electrochemical Behavior of Copper-Nickel Alloy CUNI 90/10 in Chlorinated Seawater under Stagnating Conditions

Product Number: 51300-07261-SG
ISBN: 07261 2007 CP
Author: Wilhelm Schleich, Ralf Feser, and Werner Siedlarek
Publication Date: 2007
$20.00
Picture for Effect of chlorination on corrosion of 90-10 Cu-Ni alloy for ballast water system
Available for download

51318-11418-Effect of chlorination on corrosion of 90-10 Cu-Ni alloy for ballast water system

Product Number: 51318-11418-SG
Author: Geunsu Jung / Byoung Young Yoon / Jae Kwang Lee / Chae-Seon Lim
Publication Date: 2018
$20.00

Biofouling and corrosion issues were investigated with experimental methods. 90-10 Cu-Ni samples were prepared and immersed in bottled seawater with various chlorination levels for up to 6 months.
Picture for 00642 ELECTROCHEMICAL BEHAVIOR OF SUPER STAINLESS
Available for download

00642 ELECTROCHEMICAL BEHAVIOR OF SUPER STAINLESS STEEL, TITANIUM AND CU-10%NI ALLOYS IN BRACKISH WATER

Product Number: 51300-00642-SG
ISBN: 00642 2000 CP
Author: M. F. de Romero, O. T. de Rincon, Z. Duque, P. Bohorquez, M. Espinoza
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support