34 DECEMBER 2016 MATERIALS PERFORMANCE NACE INTERNATIONAL: VOL. 55, NO. 12
identical galvanized foundations in the
same soil environment depends on their
age and the quality of the remaining galva-
nized coating.
Highly distributed anodes improve the
performance of a CP system, but the higher
construction costs should be considered.
References
1 "Management of Transmission Line Struc-
ture Foundations," Electric Power Research
Institute, Report 1013783, 2007.
2 IEEE Standard 691-2001, "IEEE Guide for
Transmission Structure Foundation Design
and Testing" (New York, NY: IEEE, 2001).
3 NACE SP0169, "Control of External Corro-
sion on Underground or Submerged Metallic
Piping Systems" (Houston, TX: NACE Inter-
national).
4 ASTM G187, " Standard Test Method for
Measurement of Soil Resistivity Using the
Tw o-Electrode S oi l B ox Method" ( West
Conshohocken, PA: ASTM International).
5 AASHTO T288, "Standard Method of Test for
Determining Minimum Laboratory Soil Re-
sistivity" (Washington, DC: AASHTO).
6 ASTM G57, "Standard Test Method for Field
Measurement of Soil Resistivity Using the
Wenner Four-Electrode Method" (West Con-
shohocken, PA: ASTM).
7 NACE CP3 Course Manual, "Cathodic Pro-
tection Technologist" (Houston, TX: NACE,
2014).
8 V. E. Perez, "Soil Corrosion Behavior of Hot-
Dipped Galvanized Steel in Infrastructure
Applications" (Ph.D. thesis, University of
British Columbia, 2014).
9 ASTM B843, "Standard Specification for
Magnesium Alloy Anodes for Cathodic Pro-
tection" (West Conshohocken, PA: ASTM).
P. TAHERI, a member of NACE International
and ASME, is the director of engineering
at Matergenics Engineering, Ltd. He has a
Ph.D. in mechanical engineering and is an
expert in testing, characterization, and
modeling of electrochemical systems
including CP systems and battery storage
systems. His industrial experience includes
corrosion inspection and corrosion risk
mitigation in power and telecom utility
structures, with emphasize on risk analysis
and field surveys.
M. ZAMANZADEH (Dr. Zee), FNACE, has
over 30 years of experience in failure
analysis, corrosion risk assessment/
management, materials selection, CP, and
coatings. He has worked in the oil and gas
and electric power utility industries
throughout his career and has resolved/
provided a wide range of materials and
corrosion engineering solutions for these
industries. He holds four certifications
from NACE International that include
Materials Selection and Design Specialist,
C o r ro s i o n S p e c i a l i s t , a n d C o a t i n g
Specialist. He is the author of over 60
technical papers and currently holds 34
patents in materials, some of which are
being produced by major manufacturers.
Editor's note: Learn more about cathodic
protection for steel structures buried in soil in
this new Materials Performance quarterly
special feature, "The Science Behind It." Now
that you've read the MP article about protect-
ing underground steel grillage power transmis-
sion tower foundations, explore the science
behind the corrosion problem , w hich is
pre sent ed in th e se rel at ed C O R RO S I O N
articles:
W.J. Schwerdtfeger, O.N. McDorman, "Potential
and Current Requirements for the Ca-
tho dic P rot e ction of St e el in S oi l s,"
Corrosion 8, 11 (1952): pp. 391-399. http://
corrosionjournal .org/doi/abs/10.5006/
0010-9312-8.11.391
A.W. Peabody, "Use of Magnesium for Cathodic
Protection of Pipe Lines in High Resistivity
Soil," Corrosion 15, 9 (1959): pp. 65-70.
http : / / c or ro si onj o u r n al . org / d o i / ab s /
10.5006/0010-9312-15.9.65
M.T. Walsh, A.A. Sagüés, "Steel Corrosion in
Submerged Concrete Structures—Part 1:
Field Observations and Corrosion Distri-
bution Modeling," Corrosion 72, 4 (2016):
pp. 518-533. http://corrosionjournal.org/
doi/abs/10.5006/1945
M. Purcar, B. Van den Bossche, L. Bortels,
J. Deconinck, P. Wesselius, "Numerical 3-D
Simulation of a Cathodic Protection Sys-
tem for a Buried Pipe Segment Surrounded
by a Load Relieving U-Shaped Vault,"
Corrosion 59, 11 (2003): pp. 1,019-1,028.
http : / / c or ro si onj o u r n al . org / d o i / ab s /
10.5006/1.3277520
M.E. Orazem, J.M. Esteban, K.J. Kennelley,
R .M. Degerstedt, "Mathematical Models
for Cathodic Protection of an Under -
ground Pipeline with Coating Holidays:
Pa r t 1 —T h e o r e t i c a l D e v e l o p m e n t ,"
Corrosion 53, 4 (1997): pp. 264-272. http://
corrosionjournal .org/doi/abs/10.5006/
1.3280467
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