You need JavaScript to view this

Influence of surface condition on the corrosion resistance of copper alloy condenser tubes in sea water

Journal Article:

Abstract

Investigation was made on the influence of various surface conditions of aluminum brass tube. The corrosion behavior of aluminum brass tube, with nine kinds of surface conditions, was studied in stagnant 0.1N NaHCo/sub 3/ solution and flowing sea water (natural, Fe/sup + +/ containing and S/sup - -/ containing water). Surface treatments investigated contained bright annealing, special annealing to form carbon film, hot oxidizing and pickling. Anodic polarization measurements in 0.1N NaHCO/sub 3/ solution showed that the oxidized surface was superior and that the pickled surface was inferior. However, relation between these characteristics and corrosion resistance in sea water has not been established. Electrochemical characteristics in flowing sea water were dependent on the surface conditions in the very beginning of immersion time; nobler corrosion potential for the surface with carbon film, higher polarization resistance for the bright annealed and the oxidized surface, and faster decrease of polarization resistance in S/sup - -/ containing sea water for the pickled surface. However, these differences disappeared in the immersion time of only 2 to 7 days. It was revealed, by the statistical analysis on the corrosion depth in corrosion test in flowing sea water and in jet impingement test, that the corrosion behavior  More>>
Publication Date:
Jul 01, 1979
Product Type:
Journal Article
Reference Number:
EDB-80-011616
Resource Relation:
Journal Name: Sumitomo Light Met. Tech. Rep.; (Japan); Journal Volume: 20:3/4
Subject:
36 MATERIALS SCIENCE; 20 FOSSIL-FUELED POWER PLANTS; BRASS; CORROSION RESISTANCE; COPPER ALLOYS; NICKEL ALLOYS; SEAWATER; CORROSIVE EFFECTS; STEAM CONDENSERS; CORROSION; TUBES; COOLING; POWER PLANTS; SURFACES; ALLOYS; CHEMICAL REACTIONS; CONDENSERS; COPPER BASE ALLOYS; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; VAPOR CONDENSERS; WATER; ZINC ALLOYS; 360105* - Metals & Alloys- Corrosion & Erosion; 200104 - Fossil-Fueled Power Plants- Components
OSTI ID:
5848424
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: SKEGA
Submitting Site:
TIC
Size:
Pages: 32-40
Announcement Date:
Jan 01, 1980

Journal Article:

Citation Formats

Sato, S, Nagata, K, and Yamauchi, S. Influence of surface condition on the corrosion resistance of copper alloy condenser tubes in sea water. Japan: N. p., 1979. Web.
Sato, S, Nagata, K, & Yamauchi, S. Influence of surface condition on the corrosion resistance of copper alloy condenser tubes in sea water. Japan.
Sato, S, Nagata, K, and Yamauchi, S. 1979. "Influence of surface condition on the corrosion resistance of copper alloy condenser tubes in sea water." Japan.
@misc{etde_5848424,
title = {Influence of surface condition on the corrosion resistance of copper alloy condenser tubes in sea water}
author = {Sato, S, Nagata, K, and Yamauchi, S}
abstractNote = {Investigation was made on the influence of various surface conditions of aluminum brass tube. The corrosion behavior of aluminum brass tube, with nine kinds of surface conditions, was studied in stagnant 0.1N NaHCo/sub 3/ solution and flowing sea water (natural, Fe/sup + +/ containing and S/sup - -/ containing water). Surface treatments investigated contained bright annealing, special annealing to form carbon film, hot oxidizing and pickling. Anodic polarization measurements in 0.1N NaHCO/sub 3/ solution showed that the oxidized surface was superior and that the pickled surface was inferior. However, relation between these characteristics and corrosion resistance in sea water has not been established. Electrochemical characteristics in flowing sea water were dependent on the surface conditions in the very beginning of immersion time; nobler corrosion potential for the surface with carbon film, higher polarization resistance for the bright annealed and the oxidized surface, and faster decrease of polarization resistance in S/sup - -/ containing sea water for the pickled surface. However, these differences disappeared in the immersion time of only 2 to 7 days. It was revealed, by the statistical analysis on the corrosion depth in corrosion test in flowing sea water and in jet impingement test, that the corrosion behavior was not influenced by surface conditions, but was significantly influenced by quality of sea water and sponge ball cleaning. Sulfide ion of 0.05 ppm caused severe pitting corrosion, and sponge ball cleaning of 5 chances a week caused erosion corrosion. From above results, it was concluded that surface conditions of aluminum brass were not important to sea water corrosion, and that quality of sea water and operating condition such as sponge ball cleaning were more significant.}
journal = {Sumitomo Light Met. Tech. Rep.; (Japan)}
volume = {20:3/4}
journal type = {AC}
place = {Japan}
year = {1979}
month = {Jul}
}