Lida MMO Solid Rod Anodes by De Nora Tech

High Output Mixed Metal Oxide Rod Anodes for C.P. Applications

  • LIDA Rod Anodes are comprised of a titanium substrate with a mixed metal oxide (MMO) coating. The mixed metal oxide is a crystalline, electrically conductive coating that activates the titanium and enables it to function as an anode.

    The anode rods are provided in a standard 4 foot length, but the anodes may be custom made to virtually any length. The standard anode diameters include 1/8", 1/4", 1/2", and 3/4". Anode coatings are available in "Standard" or "XL" depending on your application or anode current and/or life requirements.

     

    At Farwest, we can custom fabricate an anode assembly to include the LIDA anode rod of your choice.  This includes adding a cable lead with connection encapsulation, customizing probe-type anodes and more.  Contact a Farwest representative to assist you with your fabrication questions.

    Applications

    • Water Tank Tnteriors
    • Process or Production Vessels
    • Water Condenser Boxes
    • Heat Exchangers
    • Water Intake Structures
    • Groundbed (in coke breeze)

    Features

    • High Current Output
    • Low Coating Wear Rate
    • Five Year Product Warranty
    • Available as Rod Anode Assemblies

    Benefits

    • Lower Cost per Ampere-Year
    • Constant Electrical Resistance

    Standard Anode Rod Sizes

    LIDA Rod Anodes are available in these standard sizes:

    • 1/8" x 4'
    • 1/4" x 4'
    • 1/2" x 4'
    • 3/4" x 4'

  •  

    Typical Rated Current Output for LIDA MMO Anode Rods

    Application Anode Dia.
    (inches)     		Design Life
    (years)     		Rated Current Output
    (Amps per linear inch)
      Freshwater 0.125
    0.25
    0.50
    0.75    		 10
    10
    10
    10    		 20
    20
    20
    20    		 0.067
    0.134
    0.268
    0.400    		 0.044
    0.088
    0.167
    0.270
      Seawater 0.125
    0.25
    0.50
    0.75    		 10
    10
    10
    10    		 20
    20
    20
    20    		 0.140
    0.280
    0.570
    0.840    		 0.123
    0.245
    0.490
    0.740
      Coke 0.125
    0.25
    0.50
    0.75    		 10
    10
    10
    10    		 20
    20
    20
    20    		 0.052
    0.103
    0.210
    0.310    		 0.035
    0.069
    0.140
    0.210
      Sand 0.125
    0.25
    0.50
    0.75    		 15
    15
    15
    15    		 30
    30
    30
    30    		 0.0167
    0.0033
    0.0067
    0.0100    		 0.00094
    0.0019
    0.00375
    0.00556


    Selection of the anode coating is based on operating environment.

     

    Anode Life Expectancy Data

    Due to the extremely low consumption rates and dimensional stability of mixed metal oxide anodes, the electrical resistance of De Nora Rod Anodes remains essentially constant with time. The high current density capacity of De Nora mixed metal oxide anodes has the added advantage of allowing high current overloads for initial polarization without causing harm to the anode.

      

      
     

  • Lida MMO anode rods are available in a number of custom impressed current assembly confiruations that include:

    • Probe anode assemblies for insertion into interiors of oil or other production vessels
    • For soil (with coke breeze) or water applications with a single lead wire
    • For soil applications where the rod is installed in a canister with coke breeze backfill

    Probe Anode Assemblies

    Probe anodes are typically for use in the interiors of oil or other production vessels.  Configurations vary depending on the performance requirements, fitting sizes, etc.  Contact a Farwest representative for assistance in an anode design.

     

    Conventional Style Assemblies

    Lida MMO anode rods can be made with a conventional cable lead for use in soil or water applications. Typically, the cable-to-anode connection is sealed in a water-tight assembly to protect the connection from failure due to physical stress or water intrusion.  However, these assemblies can be customized as required by specification or application.

    Contact a Farwest representative for design or application assistance.

  • Anode performance and life will vary depending on a number of factors including rod diameter, length, coating type and the environment or electrolyte the anodes will be utillized.  The following graphs will help you to understand the theoretical current output and life expectancy in various electrolytes.

    Example:  In graph number 1, a 1/4" diameter, 48" long, XL coated anode in free-flowing seawater is designed to provide 10 amps DC for approximately 22 years.  Compare that with graph 5 where the same anode in coke breeze backfill will only provide a little over 3 amps DC for the same time period.

    As you can see, anode performance will vary greatly depending on the application so it is important to understand this relationship when designing any anode.