Note
Thesis (M.S.E.)--Florida Atlantic University, 1979.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
1979
Description
Constant deflection fatigue experiments performed on cathodically
protected, notched steel bars in natural sea
water produced stresses which caused short cracks to appear
soon after the beginning of testing . At stresses
above 22 ksi (152 MN/m^2), cracks grew continuously across
the bars. At stresses below 22 ksi (152 MN/m^2), and at
potentials of -1.20 volts , saturated calomel electrode SCE,
cracks did not grow, or arrested part way across the bar.
At potentials other than - 1.20 volts , SCE, stress levels
had to be less than 19 ksi (131 MN/m^2), before crack growth
could be arrested. Strain gage readings suggest calcareous
material may be forming on the fracture surfaces of cracks
in which growth was arrested. Examination of these surfaces shows a pattern of calcareous deposit and corrosion
product which suggests a potential gradient within the
crack electrolyte. A mathematical model is presented
which describes this potential gradient.
protected, notched steel bars in natural sea
water produced stresses which caused short cracks to appear
soon after the beginning of testing . At stresses
above 22 ksi (152 MN/m^2), cracks grew continuously across
the bars. At stresses below 22 ksi (152 MN/m^2), and at
potentials of -1.20 volts , saturated calomel electrode SCE,
cracks did not grow, or arrested part way across the bar.
At potentials other than - 1.20 volts , SCE, stress levels
had to be less than 19 ksi (131 MN/m^2), before crack growth
could be arrested. Strain gage readings suggest calcareous
material may be forming on the fracture surfaces of cracks
in which growth was arrested. Examination of these surfaces shows a pattern of calcareous deposit and corrosion
product which suggests a potential gradient within the
crack electrolyte. A mathematical model is presented
which describes this potential gradient.
Language
Type
Form
Extent
70 p.
Subject (Topical)
Identifier
13986
Additional Information
Thesis (M.S.E.)--Florida Atlantic University, 1979.
Date Backup
1979
Date Text
1979
Date Issued (EDTF)
1979
Extension
FAU
FAU
admin_unit="FAU01", ingest_id="ing1508", creator="staff:fcllz", creation_date="2007-07-19 01:55:50", modified_by="staff:fcllz", modification_date="2011-01-06 13:09:04"
IID
FADT13986
Issuance
monographic
Organizations
Attributed name: Florida Atlantic University
Person Preferred Name
MARTIN, PHILIP EDWARD
Graduate College
Physical Description
70 p.
application/pdf
Title Plain
INFLUENCE OF CATHODIC PROTECTION UPON CONSTANT DEFLECTION FATIGUE TESTS ON NOTCHED 1018 STEEL IN SEA WATER
Use and Reproduction
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Origin Information
1979
monographic
Boca Raton, Fla.
Florida Atlantic University
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
INFLUENCE OF CATHODIC PROTECTION UPON CONSTANT DEFLECTION FATIGUE TESTS ON NOTCHED 1018 STEEL IN SEA WATER
Other Title Info
THE
INFLUENCE OF CATHODIC PROTECTION UPON CONSTANT DEFLECTION FATIGUE TESTS ON NOTCHED 1018 STEEL IN SEA WATER