Prepackaged Magnesium Anode (Circular Type)-SACRIFICIAL ANODES-YUXI Corrosion Control

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Prepackaged Magnesium Anode (Circular Type)

YUXI's prepackaged magnesium anode is mainly composed of a cast magnesium anode centrally packed in a permeable cotton bag or cardboard tube with highly hygroscopic backfill. Normally, it is firmly wrapped in a PE bag or paper outer lining (usually for shipping purposes) which should be removed prior to installation. The added backfill helps to decrease the resistance of the anode to the ground, retains moisture and allows for a better efficiency and homogeneous consumption of the anode, thus creating an efficient anode bed. They are generally applied in the sacrificial anode cathodic protection (SACP) system of onshore pipelines, underground storage tanks (USTs), external bottom of aboveground tanks, etc.

PRODUCT INTRODUCTION
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Quality Substrate Material

Our magnesium anode is casted from high-purity magnesium ingot and advanced technology. There are
two alloy types with different electro-potential as below:

◉ High Potential

High potential anode is manufactured from 99% pure magnesium, according to ASTM B843-M1C standard.

Element	Content (%)
Aluminum (Al)	0.010 max.
Manganese (Mn)	0.500 ~ 1.300
Zinc (Zn)	-
Silicon (Si)	0.050 max.
Copper (Cu)	0.020 max.
Iron (Fe)	0.030 max.
Nickel (Ni)	0.001 max.
Single Impurity	0.050 max.
Other Impurities	0.300 max.
Magnesium (Mg)	Remainder

◉ Standard Potential

Standard potential anode is manufactured in accordance with ASTM B843-AZ63B standard.

Element	Content (%)
Aluminum (Al)	5.300 ~ 6.700
Manganese (Mn)	0.150 ~ 0.700
Zinc (Zn)	2.500 ~3.500
Silicon (Si)	0.100 max.
Copper (Cu)	0.020 max.
Iron (Fe)	0.003 max.
Nickel (Ni)	0.002 max.
Single Impurity	0.050 max.
Other Impurities	0.300 max.
Magnesium (Mg)	Remainder

Different Electro-potential Options

◉ High Potential

The high driving voltage means greater protection can be delivered from fewer anodes. Its open circuit potential is as high as -1.7 volts, which is 20~30% greater than standard potential anodes. Therefore, it is capable to be used in dry or sandy areas where resistivities exceeding 2,000 Ω·cm, or for structures containing numerous corrosion hot-spots.

Technical Measurement	Performance
Open Circuit Voltage	1.70 ~ 1.75 Volts
Closed Circuit Voltage	1.58 ~ 1.62 Volts
Current Capacity	1100 A.h/kg (500 A.h/lbs)
Current Efficiency	50% min.

◉ Standard Potential

The zinc and aluminum elements lower the cost of the anode, but they also lower the driving potential. It is ideal for soil conditions where resistivity is under 20 Ω.m.

Technical Measurement	Performance
Open Circuit Voltage	1.50 ~ 1.55 Volts
Closed Circuit Voltage	1.45 ~ 1.50 Volts
Current Capacity	1230 A.h/kg (550 A.h/lbs)
Current Efficiency	55% min.

* The open/closed circuit voltage is with respect to a saturated calomel electrode.

Environment-friendly Backfill

Our backfill is prepared with the following naturally degradable and recyclable materials according to a certain weight ratio:
● Hydrated Gypsum: 75%
● Bentonite: 20%
● Sodium Sulphate: 5%

The content of harmful elements in the backfill is lower than industrial safety standards, which will not bring any pollution
to the surroundings.
● Cadmium(Cd): ≤ 1 ppm
● Arsenicum(As): ≤ 1 ppm
● Mercury(Hg) : ≤ 1 ppm
● Phosphorus(P): ≤ 10 ppm

Multiple Cable Options

Our standard lead cable is 10ft. AWG #12 Solid THHN/THWN. PVC/PVC, XLPE/PVC, HMWPE or TW cable can also be supplied with customized sizes, lengths and colours upon request. The cable can be connected by direct brazing, mechanical or welding to ensure high pull strength and low connection resistance.

Easy Installation

Prepackaged anode is appropriate for direct burial. It simplifies the on-site construction process for convenient and fast installation. The original operation at the construction site will be completed in the factory, which effectively ensure the construction and installation quality of the anode ground bed.

Prepackaged Magnesium Anodes Datasheet

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