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Magnesium Anodes
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MAGNESIUM SACRIFICAL ANODES
Magnesium anodes are employed in many sacrificial anode systems, due to their light weight and high output ratings. They are an economical choice for underwater or underground applications, especially in environments with high electrical resistance. EDOPEC magnesium anodes come in a full array of shapes and sizes to fit any cathodic protection application. The underground anodes may be ordered bare or packaged, depending on your project specifications.
EDOPEC magnesium anodes are available for the following applications:
• Pipelines
• Underground tanks
• Condensers
• Heat exchangers
• Ship hulls
• Soil
• Piers & Pilings
Chemical Composition
EDOPEC Magnesium anodes are available in Hi- potential and standard grades(H-1 Grade, Grade II, Grade III) with the chemical composition as following:
|
MAGNESIUM CHEMICAL COMPOSITION |
||||
|
Element |
EDO-XXLB –HPMG Hi-Potential |
EDO-XXLB-H1MG-H-1 Grade |
EDO-XXLB-H2MG Grade II |
EDO-XXLB-H2-MG Grade III |
|
Al |
0.010% max |
5.0 - 7.0% |
5.3 - 6.7% |
5.3 - 6.7% |
|
Mn |
0.50 - 1.30% |
0.15% min |
0.15% min |
0.15% min |
|
Zn |
0.05% max |
2.0 - 4.0% |
2.5 - 3.5% |
2.5 - 3.5% |
|
Si |
0.05% max |
0.30% max |
0.30% max |
0.10% max |
|
Cu |
0.02% max |
0.1% max |
0.05% max |
0.02% max |
|
Ni |
0.001% max |
0.003% max |
0.003% max |
0.002% max |
|
Fe |
0.001% max |
0.001% max |
0.001% max |
0.001% max |
|
Other |
0.05% each |
0.30% max |
0.30% max |
0.30% max |
|
or 0.30% total |
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|
Magnesium |
Remainder |
Remainder |
Remainder |
Remainder |
High potential magnesium anodes are used to protect buried metallic structures found in a range of soil resistivity's.
High Potential anodes cast from high-purity magnesium, produce an open circuit potential of 1.70 volts, which is 20.3 percent greater than conventional magnesium anodes. This high driving voltage means greater protection can be delivered from fewer anodes. Efficiency of the anode is enhanced even further when installed in a backfill of 75% gypsum, 20% bentonite, and 5% sodium sulfate. This special mixture lowers anode-to- earth resistance, and allows electrical current to flow more easily to the targeted structure.
MAGNESIUM ANODES DIMENSIONS
For low current requirement applications such as gas distribution risers, drive-in magnesium anodes are an economical choice. Anodes are manufactured from extruded magnesium rods, fitted with a special steel driving cap.
Pre-packaged Magnesium Anodes
EDOPEC's magnesium anodes come in a full array of shapes and sizes to fit any cathodic protection application. The underground anodes may be ordered bare or packaged, depending on your project specifications. Magnesium anodes for buried pipelines, casings, tanks and similar structures are supplied packaged in a cotton bag containing backfill. The backfill powder reduces the soil resistivity surrounding the anodes and improves the anode performance.
Standard backfill composition
|
Powdered Gypsum |
: 75% |
|
Granular Bentonite |
: 20% |
|
Sodium Sulphate |
: 5% |
Chemical Composition of High Potential Mg Anode
|
Element |
Content, wt% |
|
Aluminum |
Max 0.01 |
|
Manganese |
0.5 – 1.3 |
|
Zinc |
- |
|
Silicon |
Max 0.05 |
|
Copper |
Max 0.02 |
|
Nickel |
Max 0.001 |
|
Iron |
Max 0.0013 |
|
Other total |
Max 0.30 |
|
Magnesium |
Reminder |
Electrochemical Properties
|
Type |
High Potential |
|
OCP (V vs. Ag/AgCl) |
- 1.70 |
|
Max Current Capacity |
1100 Ah/Kg |
Typical dimensions and Size
|
Bare |
Packaged |
Bare |
Packaged |
|||
|
A |
B |
C |
D |
E |
||
|
17 |
40 |
100 mm |
100 mm |
540 mm |
180 mm |
740 mm |
|
Cable type |
1×10 sqr mm XLPE/PVC |
|
Cable length |
3 Meter |
Cable Connection Properties
|
Cable connection Tensile Strength |
>100 kgf |
|
Cable Connection Electrical Resistance |
<0.01ohm |
Please see the more detail Here is this link. and file Datasheets
