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Designing Cathodic Protection Systems for Marine Structures and Vehicles
ASTM Selected Technical Papers
Designing Cathodic Protection Systems for Marine Structures and Vehicles
By
HP Hack
HP Hack
1
Northrop Grumman Corporation
,
Annapolis, MD symposium chairman and editor
.
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ISBN-10:
0-8031-2623-9
ISBN:
978-0-8031-2623-7
No. of Pages:
118
DOI:
https://doi.org/10.1520/STP1370-EB
Publisher:
ASTM International
Publication date:
1999
eBook Chapter

The Slope Parameter Approach to Marine Cathodic Protection Design and its Application to Impressed Current Systems

By
WH Hartt
WH Hartt
1
Professor of Ocean Engineering and Director of the Center for Marine Materials
,
Florida Atlantic University
,
Boca Raton, Florida 33431
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Doi:
https://doi.org/10.1520/STP13350S
Page Count:
16
  • Published:
    1999

The recently developed slope parameter approach to design of galvanic anode cathodic protection (cp) systems for marine structures constitutes an advancement in this technology compared to current practice, primarily because the former is first principles based and the latter is an empirical algorithm. In this paper, the slope parameter approach is reviewed; and related applications for which it can be utilized, including 1) design of new and retrofit cp systems, 2) evaluation of potential survey data, and 3) cp system design for complex geometries, are mentioned. The design current density is identified as the single remaining parameter for which values must be projected solely by experience or experimentation. In addition, the slope parameter approach is applied to the results of impressed current cp experiments, and it is shown how parameters for this can be interrelated with those of galvanic anode cp. Advantages of this capability are identified and discussed.

Keywords:
cathodic protection, impressed current, galvanic anode, slope parameter, offshore structures, design, marine, seawater

References

1.
Davy
,
H.
,
Phil. Trans. Royal Soc. London
, Vol.
114
,
1824
, p.151.
2.
Davy
,
H.
,
Phil. Trans. Royal Soc. London
, Vol.
114
,
1824
, p.242.
3.
Davy
,
H.
,
Phil. Trans. Royal Soc.
London, Vol.
115
,
1825
, p.328.
4.
Dwight
,
H. B.
, “
Calculations of Resistance to Ground
,”
Electrical Engineering
, Vol.
55
,
1936
, pp. 1319–1328.
5.
Sunde
,
E. D.
,
Earth Conduction Effects in Transmission Systems
,
Dover Publications, Inc.
,
New York
,
1968
.
6.
McCoy
,
J. E.
, “
Corrosion Control by Cathodic Protection — Theoretical and Design Concepts for Marine Applications
,”
Transactions Institute of Marine Engineers
, Vol.
82
,
1970
, pp. 210–214.
7.
Cochran
,
J. C.
, “
A Correlation of Anode-to-Electrolyte Resistance Equations Used in Cathodic Protection
,” paper no. 169 presented at CORROSION/82, March 22–26, 1982,
Houston
.
8.
Strommen
,
R.
, “
Evaluation of Anode Resistance Formulas by Computer Analysis
,”
Materials Performance
, Vol.
24
(
3
),
1985
, pp. 9–15.
9.
Sunde
,
E. D.
,
Earth Conduction Effects in Transmission Systems
,
Dover Publications, Inc.
,
New York
,
1968
, p. 72.
10.
Cochran
,
J. C.
, “
Additional Anode-to-Electrolyte Resistance Equations Useful in Offshore Cathodic Protection
,” paper no. 254 presented at CORROSION/84, April 2–6, 1984,
New Orleans
.
11.
Cox
,
G. C.
, U.S. Patent 2,200,469,
14
05
1940
.
12.
Foster
,
T.
, and
Moores
,
V. G.
, “
Cathodic Protection Current Demand of Various Alloys in Seawater
,” paper no. 295 presented at CORROSION/86, March 17–21, 1986,
Houston
.
13.
Mollan
,
R.
 and
Anderson
,
T. R.
, “
Design of Cathodic Protection Systems
,” paper no. 286 presented at CORROSION/86, March 17–21, 1986,
Houston
.
14.
Fischer
,
K. P.
,
Sydberger
,
T.
, and
Lye
,
R.
, “
Field Testing of Deep Water Cathodic Protection on the Norwegian Continental Shelf
,” paper no. 67 presented at CORROSION/87, March 9–13, 1987,
San Francisco
.
15.
Evans
 
S.
, “
Use of Initial Current Density in Cathodic Protection Design
”,
Material Performance
,
02
1988
, Vol.
27
(
2
), pp. 9–11.
16.
Fischer
,
K. P.
 and
Finnegan
,
J. E.
, “
Cathodic Protection Behavior of Steel in Sea Water and the Protective Properties of the Calcareous Deposits
,” paper no. 582 presented at CORROSION/89, April 17–21, 1989,
New Orleans
.
17.
Schrieber
,
C. F.
 and
Reding
,
J.
, “
Application Methods for Rapid Polarization of Offshore Structures
,” paper no. 381 presented at CORROSION/90, April 23–27, 1990,
Las Vegas
.
18.
Wang
,
W.
,
Hartt
,
W. H.
, and
Chen
,
S.
, “
Sacrificial Anode Cathodic Polarization of Steel in Seawater
,”
Corrosion
, Vol.
52
,
1996
, pp. 419–427.
19.
Wolfson
,
S. L.
 and
Hartt
,
W. H.
, “
An Initial Investigation of Calcareous Deposits upon Cathodic Steel Surfaces in Seawater
,”
Corrosion
, Vol.
37
,
1981
, pp. 70–75.
20.
Hartt
,
W. H.
,
Culberson
,
C. H.
, and
Smith
,
S. W.
, “
Calcareous Deposits on Metal Surfaces in Seawater — A Critical Review
,”
Corrosion
, Vol.
40
,
1994
, pp. 609–618.
21.
Lin
,
S-H
 and
Dexter
,
S. C.
, “
Effects of Temperature and Magnesium Ions on Calcareous Deposition
,”
Corrosion
, Vol.
44
,
1988
, pp. 615–622.
22.
Finnegan
,
J. E.
 and
Fischer
,
K. P.
, “
Calcareous Deposits: Calcium and Magnesium Ion Concentrations
,” paper no. 581 presented at CORROSION/89, April 17–21, 1989,
New Orleans
.
23.
Luo
,
J. S.
,
Lee
,
R. U.
,
Chen
,
T. Y.
,
Hartt
,
W. H.
 and
Smith
,
S. W.
, “
Formation of Calcareous Deposits under Different Modes of Cathodic Polarization
,”
Corrosion
, Vol.
47
,
1991
, pp. 189–196.
24.
Mantel
,
K. E.
,
Hartt
,
W. H.
, and
Chen
,
T. Y.
, “
Substrate, Surface Finish, and Flow Rate Influences on Calcareous Deposit Structure
,”
Corrosion
, Vol.
48
,
1992
, pp. 489–500.
25.
Hartt
 
W. H.
,
Chen
,
S.
, and
Townley
,
D. W.
, “
Sacrificial Anode Cathodic Polarization of Steel in Sea Water — Part II: Design and Data Analysis
,”
Corrosion
, Vol.
54
,
1998
, pp. 317–322.
26.
Hartt
,
W. H.
 and
Chen
,
S.
, “
Sacrificial Anode Cathodic Polarization of Steel in Sea Water — Part II: Retrofit Cathodic Protection of Offshore Structures
,” accepted for publication in
Corrosion
.
27.
Townley
,
D. W.
, “
Unified Design Equation for Offshore Cathodic Protection
,” paper no. 97473 presented at CORROSION/97, March 9–14, 1997,
New Orleans
.
28.
Pierson
,
P.
 and
Hartt
,
W. H.
, “
Galvanic Anode Cathodic Polarization of Steel in Sea Water — Part IV: Conductor Arrays on Offshore Petroleum Production Platforms
,” accepted for publication in
Corrosion
.
29.
Kennelley
,
K. J.
 and
Mateer
,
M. W.
, “
Evaluation of the Performance of Bi-Metallic Anodes on Deep Water Production Platforms
,” paper no. 523 presented at CORROSION/93, March 8–12,1993,
New Orleans
.
30.
Hartt
,
W. H.
, “
Fatigue of Welded Structural Steel in Seawater
,” paper no. 3962, Proc. Offshore Technology Conference,
Society of Petroleum Engrs.
,
Richardson, TX
,
1980
, pp. 87–104.
31.
Bazzoni
,
B.
 and
Lazzari
,
L.
, “
A New Approach for Automatic Control and Monitoring of Cathodically Protected Reinforced Concrete Structures
,”
Materials Performance
, Vol.
31
(
12
),
1992
, pp. 13–18.
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