ProMag Standard Potential Magnesium Anodes for Cathodic Protection by Farwest Corrosion

Provides Lower Driving Voltage for Low Resistance Soil

  • Description

    ProMag H-1 alloy, commonly known as standard potential magnesium, is an excellent choice for use in cathodic protection systems in average soil conditions. Typically, ProMag H-1 anodes produce a minimum open circuit potential of 1.52 volts with respect to CuCuSO4. Therefore, the driving potential of the H-1 cathodic protection anodes exceeds that of aluminum or zinc, but is still lower than a high potential magnesium anode.

    At Farwest Corrosion, we attach a copper lead wire (size, length and insulation type as specified) to the H-1 anode and seal the connection interface. If required, the H-1 anode will be packaged in a cloth bag with prepared backfill mixture of 75% gypsum, 20% bentonite and 5% sodium sulfate. The backfill mixture works to maintain moisture around the anode and lowers the anode to earth resistance. The packaged anodes are shipped on pallets in plastic bags that must be removed prior to installation.

    ProMag Anode pdf data sheet

  • ProMag Chemical
    Typical Chemical Analysis
       Aluminum    5.3 - 6.7%
       Zinc    2.5 - 3.5%
       Manganese    0.15 - 0.7%
       Silicon    0.10% max
       Copper    0.02% max
       Nickel    0.002% max
       Iron    0.003% max
       Others    0.30% max
       Magnesium    Remainder

  • ProMag Anode Dimensions

    Anode
    Size    		 Bare
    Weight    		 Packaged
    Weight    		 Bare Packaged
    A B C D E
    1S1* 1 10 1-1/2" 1-5/8" 9" 4" 12"
    3D3* 3 12 3-1/2" 3-1/2" 5-1/2" 6" 10"
    5D3* 5 16 3-1/2" 3-1/2" 9.5" 6" 14"
    9D3* 9 27 3-1/2" 3-1/2" 13.5" 6-1/2" 19"
    17D3* 17 45 4" 3-1/2" 25-1/2" 6-1/2" 29"
    20D2 20 70 2-3/4" 2-3/4" 56-3/4" 6-1/2" 62"
    32D5* 32 70 6" 5-3/4" 21" 8-1/2" 28"
    48D5* 48 105 5-3/4" 5-3/4" 30-1/2" 7-3/4" 38"
    60D4 60 126 4-1/2" 4-1/2" 60-1/2" 7" 64"
       
    * Standard inventory sizes. Other special anode configurations are available.
      Please contact Farwest for details.

     

    Notes:
       1. Packaged weights and dimensions are approximate and can vary slightly.
       2. Ingot weight may be + or - 2%.

  •  

    How to Order ProMag Anodes

    Please specify the following:

    • The ProMag H-1 anode of your choice. Please refer to the dimension and weight chart.
    • The quantity you require.
    • The lead wire gauge, stranding, length, and insulation type. Our standard wire is 10 ft #12 THHN solid wire.
    • If the anode is to be shipped bare or prepackaged in 75% gypsum, 20% bentonite and 5% sodium sulfate.
    • Any other special requirements.

    Should you have any questions concerning applications for the ProMag H-1 magnesium anode, Farwest's team of engineers can assist you in the proper anode selection.