Wire Anodes

 

LIDA^® wire anodes are copper titanium wire with a mixed metal oxide coating. The mixed metal oxide is a crystalline, electricallyconductive coating that activates the titanium and enables it to function as an anode.

LIDA^® wire anodes are manufactured in two diameters, 1.5 millimeter and 3.0 millimeter.

When applied on titanium the coating has an extremely low consumption rate measured in terms of milligrams per year. As a result of this low consumption rate, the wire diameter remains nearly constant during the life of the anode.

The low consumption rate of the mixed metal oxide coating at the recommended operating current densities result in projected anode lifetimes from 15 to 20 years. Longer or shorter lifetimes may be obtained by varying the current output per foot per wire.

Resistivity Versus Length — Proper current distribution is an important factor in the design and proper use of an anode wire for each application. For example, if a wire voltage drop of 10% or less is desired fo rproper current distribution in 1000 ohm-cm
water, anode segments of 45 feet should not be exceeded between electrical connections to a header cable with the 1.5 mm diameter wire. By comparison,use of the 3.0 mm diameter wire will permit theuse of 110-foot segments, while still allowing the desired 10%voltage drop.

As with all electrical conductors, the operating temperature of the wire effects the resistance. The table below, shows this effect by assuming the wire will operate at the temperature of the surrounding electrolyte. The change in resistivity also changes the maximum ampacity of the wire.

Anode Coating — The coating used on wire is suitable for most cathodic protection applications, but output varies with application.

LIDA^® mixed metal oxide coating demonstrates a very high chemical stability, even in environments with very low pH values.

Unlike other impressed current anodes, the LIDA® coating is not affected by the generation of chlorine.

Lead Wire Connection — A typical connection between the LIDA® wire anode and a header cable, have been used successfully in canistered anodes since 1987.

APPLICATIONS

• Canistered Anodes
• Continuous Horizontal Groundbeds
• Discontinuous Horizontal Groundbeds
• Shallow Vertical Groundbeds
• Deep Anode Groundbeds
• Above Ground Storage Tanks
• Underground Storage Tanks
• Natural Water
• Electrical Cable Shielding
• Water Storage Tanks
• Water Treatment Equipment

Savings — In many cases, LIDA^® mixed metal oxide wire anodes offer savings over competitive anodes on an installed cost basis. This is possible by balancing the high current density capability of mixed metal oxide coatings and the ability to tailor to desired lifetimes.

Flexibility of Use — LIDA^® wire anodes can be used in a wide variety of cathodic protection applications. Their lightweight and malleability allow forming to complex configurations. The copper core provides high conductivity resulting in better current distribution along the entire length of the wire.

Dimensions

Nom-Wire		Diameter	Tolerance	Titanium		Copper		Active Surface Area		Weight
Size		(mm)	(inches)	%	%	%	%	ft2/ft	m2/m	lbs/ft	g/m
(mm)	(inches)			By Wt	By Vol	By Wt	By Vol	of Length	of Length
1.5	0.062	+0.15 -0.0	+0.007 -0.0000	36.1	52.7	63.9	47.3	0.017	5.1E-03	0.009	13.7
3.0	0.118	+0.28 -0.00	0.010 -0.000	17.1	29.0	82.9	71.0	0.033	1.0E-02	0.042	62.5

Wire Size

Wire Size mm	1.5	3.0
Electrical RES.ohm/m@25°C	0.0174	0.003
Electrical RES.ohm/m@70°C	0.0204	0.0035
Max. Wire Amperage @25°C, Amps	21	36
Max. Wire Amperage @70°C, Amps	7	12

 

Maximum Current for Various LIDA® Wire Anodes (life in years)
LIDA Wire Anode in Coke	LIDA Wire Anode in Sea Water
LIDA Wire Anode in Sand	LIDA Wire Anode in Fresh Water
LIDA® Wire Anode, with titanium non copper cored, 1.5 and 3 mm diameters, is available on request.

Click here for a print friendly PDF version.

LIDA® is a U.S. registered trademark of ELTECH Systems Corporation. LIDA® is a registered
trademark worldwide of Oronzio de Nora SA licensed exclusively to the De Nora Elettrodi Network.

LIDA TSA™ a trademark of ELTECH Systems Corporation and De Nora Elettrodi Network.
All information, recommendations and suggestions appearing herein concerning the
use of our products are based upon tests and data believed to be reliable. However, it is
the user’s responsibility to determine the suitability for his own use of the products
described herein. Since the actual use by others is beyond our control, no guarantee,
expressed or implied, is made by De Nora Elettrodi Network Companies as to the effects
of such use or the results to be obtained, nor does De Nora Elettrodi Network Companies
assume any liability arising out of the use by others of the products referred to herein. In
addition, the information herein is not to be construed as absolutely complete since additional information may be necessary or desirable when particular circumstances exist or because
of applicable laws or government regulations. Nothing herein contained is to be construed
as a recommendation to infringe any patent.