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PLATTLINE™
Zinc Ribbon
Anodes
for Cathodic Protection
The maintenance-free method for
underground
or underwater corrosion control
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Plattline
zinc ribbon anodes are ideal as a cathodic
protection system for coated pipe. They are simple to install.
Shown in this photograph is installation of Plattline on 387 miles of the Alyeska
Pipeline. |
Zinc
Ribbon Anodes for Cathodic
Corrosion Protection
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| Plattline™ zinc ribbon anodes provide a very simple, cost effective,
maintenance free method of corrosion control for buried or immersed metals such as iron,
steel, aluminum copper, etc. Zinc is especially useful for unattended applications; those
where other cathodic protection systems requiring monitoring and frequent maintenance or an
external power source are not possible.
Plattline zinc ribbon anodes are used in a variety
of applications: for cathodic protection
on buried pipelines, for A.C. mitigation on pipelines,
for sacrificial cathodic protection of secondary bottoms
on above-ground storage tanks, for A.C. mitigation grounding
mats, and for many other corrosion protection applications.
Plattline is an ideal primary or supplemental cathodic
protection system. It can also be used as a temporary system prior to the installation of
an impressed current system.
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Applications
- External areas of steel pipe,
especially in difficult environments such as below grade in rocky and mountainous terrain,
thawed zones in permafrost.
- Interior bottom areas of oil storage tanks where salt water
settles out.
- Exterior bottom of oil storage tanks.
- Interstitial spaces between old, corroded and new storage
tank bottoms.
- In the limited space between inner and outer casings of
wells of various kinds.
- For grounding steel tower footings of overhead power
systems.
- To provide cathodic protection as well as to dissipate
induced AC current on coated steel pipe.
- For personal safety as well as corrosion protection. To
ground valves and test stations of pipelines which are subject to induced AC current and
fault currents.
Electrochemical Properties of
Zinc Ribbon Anodes
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Plattline Type
I |
Plattline Type
II |
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Open
Circuit Potential (-V)* |
1.05
min |
1.10
min. |
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Closed
Circuit Potential (-V)* |
1.00
min. |
1.05
min. |
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Current
Capacity (amp-hrs/lb) |
372 |
372 |
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Galvanic
Efficiency (%) |
95 |
90 |
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Consumption-Actual
(lb/amp•yr) |
24.8 |
26.2 |
Features
High Current output to volume ratio.
Easily conforms to any cathode
length or configuration.
No special equipment is needed for
installation.
Will not cause or magnify stray
currents.
Generally used in soils of 2000
ohm-cm or less with prepared gypsum-clay backfill. However, Plattline can be used in soils
with higher resistivity on well coated pipelines with low current requirements.
Because Plattline is in a continuous
ribbon form, there is an even distribution of current density to the cathode.
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Product
Size |
Super |
Plus |
Standard |
Small |
Cross Section,
inches (mm) |
1" x 1
1/4"
(25.4 x 31.7) |
5/8" x
7/8"
(15.9 x 22.2) |
1/2" x
9/16"
(12.7 x 14.3) |
11/32" x
13/32"
(8.7 x 10.3) |
Weight, pounds/foot
(Kg/meter) |
2.4
(3.57) |
1.2
(1.78) |
0.6
(0.89) |
0.25
(0.37) |
Dia. of wire core
inches (mm) |
0.185
(4.70) |
0.135
(3.43) |
0.130
(3.30) |
0.115
(2.92) |
Standard coil length
Feet (mm) |
100 +10 -0
(30.5 +3 -0) |
200 +20 -0
(61 +6 -0) |
500 +30 -0
(152 +9 -0) |
1000 +50 -0
(305 +15 -0) |
Standard coil I.D.
inches (cm) |
36
(91) |
36
(91) |
12
(30.5) |
12
(30.5) |
| Packaging |
Steel-banded,
random-wound
open coils |
Wood reels |
Notes:
- All dimensions and weights are
nominal.
- Wire core is galvanized steel.
- Arctic" standard size has
nominal core diameter of .163" (4.14 mm).
- Longer coil sizes are available
on special order. Standard coil lengths of 1000' and 3600' are
also available.
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Alloys
- PLATTLINE I is
an alloyed zinc product and is generally used in sea water or brackish water. It meets the
chemical requirements of MIL-A-18001K and ASTM B418-88 Type 1. The Super and Plus sizes
are normally available from stock.
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