Morphological evidence for a pitting mechanism in dilute aluminum alloys
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Authors
Perkins, Arthur Jeffery
Cummings, J. R.
Graham, Kenneth J. (Kenneth Judson)
Subjects
pitting
aluminum alloys
corrosion products
scanning electron microscopy
aluminum alloys
corrosion products
scanning electron microscopy
Advisors
Date of Issue
1978-06
Date
1978-06
Publisher
Monterey, California. Naval Postgraduate School
Language
eng
Abstract
In the course of an investigation of the seawater corrosion behavior of several dilute aluminum alloys, direct microscopic evidence of pitting phenomena was obtained. Observations, obtained by scanning electron microscopy after galvanic corrosion exposures, illustrate a pitting mechanism involving the extrusion of columns of corrosion product from pits by the action of hydrogen gas generated inside the pits. The macroscopic dissolution patterns of the various alloys and their respective microscopi dissolution morphologies are also described. The observations support the classical model for pitting of aluminum originally presented by Edeleanu and Evans. (Author)
Type
Technical Report
Description
Series/Report No
Department
Identifiers
NPS Report Number
NPS-69PS-78-005
Sponsors
supported by the Office of Naval Research,
Naval Ship Systems Command, Metallurgy Program Office, Code 471, Arlington, VA
Funder
N00014-78-WR-80105
Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.