Quality Substrate Material
The bare magnesium anode is casted from high-purity magnesium and has two alloy types available with varying electrode potential (relative to a Cu/CuSO4 reference electrode).
1. Standard Magnesium Alloy Anode
The standard potential(H1) anode is manufactured in accordance with ASTM B843 – AZ63B standard, containing 90% Magnesium, 6% Aluminum and 3% Zinc. The zinc and aluminum elements are used to lower the cost of the anode, however, they do also lower the driving potential to about -1.55 volts (relative to a Cu/CuSO4 reference electrode). This product is ideal for soil conditions where resistivity is under 20 Ω.m.
2. High Potential Magnesium Alloy Anode
The high potential anode is manufactured from 99% pure magnesium, according to ASTM B843 – M1C standard. It has higher open circuit voltage and driving potential than standard potential anode, with its open circuit potential being as high as -1.7 volts. The high driving voltage means greater protection can be provided by fewer anodes. Therefore, this anode is able to be used in a higher soil resistivity environment.
Environment-friendly Backfill
The added backfill helps to decrease the electrical resistance of the anode to the ground as well as retain moisture which allows for better efficiency and homogeneous consumption of the anode, thus creating an efficient anode bed. Our backfill is prepared with naturally degradable and recyclable materials in the following weight ratio*:
- Hydrated Gypsum: 75%
- Bentonite: 20%
- Sodium Sulphate: 5%
The content of harmful elements in the backfill is below the industrial safety standards, meaning it will not introduce any pollution to the surrounding environment.
- Cadmium ≤ 1 ppm
- Arsenicum ≤ 1 ppm
- Mercury ≤ 1 ppm
- Phosphorus ≤ 10 ppm
* Other specialized mixture compositions are available upon request.
Easy Installation
The prepackaged magnesium anode is appropriate for direct burial. This simplifies the on-site construction process, as some processes which traditionally took place on site (such as backfilling) are carried out in the factory prior to delivery, making for a convenient and fast installation. This helps to ensure the construction and installation quality of the anode ground bed remain consistent.
Multiple Cable Options
Our standard lead cable is 10ft. AWG #12 Solid THHN/THWN. Other options include PVC/PVC, XLPE/PVC, HMWPE or TW, which can be supplied in custom sizes, lengths and colors upon request. The cable can be connected by direct brazing, mechanical fastening or welding to ensure high pull strength and low connection resistance.
Customized Configurations
We have developed a wide range of prepackaged magnesium anodes for various soil applications. Drawing from over 50 years production experience, Jennings Anodes have the capability to fully customize anode shape, size and service life to meet your desired specification upon request.
| Item No. | Anode Dimensions ( W x H x L ) | Insert Dimensions | Prepackaged Size | Weight | ||||
| High Potential | Standard Potential | Wc | T | Diameter | Length | Bare | Prepackaged | |
| JA-MG-5D3 | 3.5” x 3.7” x 7.5” (89 x 95 x 190 mm) | 3.5” x 3.7” x 7.1” (89 x 95 x 180 mm) | 0.6” (14 mm) | 0.06” (1.5 mm) | 6.3″ (160 mm) | 11.8″ (300 mm) | 5 lbs (2.3 kg) | 19.8 lbs (9 kg) |
| JA-MG-9D3 | 3.5” x 3.7” x 13.6” (89 x 95 x 345 mm) | 3.5” x 3.7” x 12.8” (89 x 95 x 325 mm) | 0.6” (14 mm) | 0.06” (1.5 mm) | 6.3″ (160 mm) | 21.7″ (550 mm) | 9 lbs (4.1 kg) | 35 lbs (16 kg) |
| JA-MG-17D3 | 3.5” x 3.7” x 25.4” (89 x 95 x 645 mm) | 3.5” x 3.7” x 24.0” (89 x 95 x 610 mm) | 0.6” (14 mm) | 0.06” (1.5 mm) | 6.3″ (160 mm) | 30.7″ (780 mm) | 17 lbs (7.7 kg) | 48.5 lbs (22 kg) |
| JA-MG-20D2 | 2.8” x 3.0” x 60.0” (70 x 76 x 1524 mm) | 2.8” x 3.0” x 58.9” (70 x 76 x 1495 mm) | 0.6” (14 mm) | 0.06” (1.5 mm) | 5.5″ (140 mm) | 65″ (1650 mm) | 20 lbs (9.1 kg) | 83.8 lbs (38 kg) |
| JA-MG-32D5 | 5.5” x 5.7” x 19.6” (140 x 146 x 498 mm) | 5.5” x 5.7” x 18.6” (140 x 146 x 472 mm) | 0.8” (20 mm) | 0.08” (2 mm) | 7.9” (200 mm) | 26.8” (680 mm) | 32 lbs (14.5 kg) | 66.1 lbs (30 kg) |
| JA-MG-48D5 | 5.5” x 5.7” x 29.5” (140 x 146 x 750 mm) | 5.5” x 5.7” x 28.0” (140 x 146 x 710 mm) | 0.8” (20 mm) | 0.08” (2 mm) | 8.1” (205 mm) | 37.8” (960 mm) | 48 lbs (21.8 kg) | 99.2 lbs (45 kg) |
| JA-MG-60D4 | 4.4” x 4.4” x 60.0” (112 x 112 x 1524 mm) | 4.5” x 4.5” x 58.5” (114 x 114 x 1485 mm) | 0.8” (20 mm) | 0.12” (3 mm) | 7.5″ (190 mm) | 65″ (1650 mm) | 60 lbs (27.3 kg) | 150 lbs (68 kg) |
