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ID 20605
file
creator
Yasunaga, David T.
Shibutani, Toshihiro
Shinkai, Koichi
subject
erosion-corrosion
aluminum
peltier element
cathodic corrosion
NDC
Metal and mining engineering
abstract
A new type of jet-in-slit testing apparatus for a specimen, chilled with a peltier element, was developed to investigate corrosion on the heat transfer surface of an aluminum alloy heat exchanger, in contact with a liquefaction gas at cryogenic temperature and in flowing seawater. The specimen can be chilled, even under flowing conditions, using this apparatus. Corrosion tests and polarization measurements of a specimen chilled by a peltier element were carried out in flowing seawater at various temperatures. The effect of chilling a specimen was equivalent to the effect achieved for a test in solution at a lower temperature. The process was dependent on a passive film, formed on the surface of the aluminum alloy specimen, as evidenced by polarization measurements. The extent of corrosion damage increased with increasing temperature of the solution, and showed maximum damage at high temperature. At high temperatures, erosion-corrosion was found at the central part of the specimen, but the effect of flow was negligible at low temperature. Corrosion tests for a cathodically polarized specimen were conducted under flowing conditions. Corrosion damage was accelerated by cathodic polarization at lower temperatures.
journal title
Materials and Corrosion / Werkstoffe und Korrosion
volume
Volume 89
issue
Issue 5
start page
581
end page
590
date of issued
2007
publisher
Wiley-VCH Verlag GmbH
issn
0947-5117
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2007 John Wiley & Sons, Inc.
relation url
department
Graduate School of Engineering