Cathodic Protection Prepacked Magnesium Anode, SacrificialMagnesium
Anode
It is made of recyclable materials or easily decomposable materials
and the content of harmful elements in the backfill is lower than
safety standards, which will not bring any pollution to the
surrounding.
The available cables type (insulation/sheath) are: PVC/PVC,
XLPE/PVC, HMWPE etc. with any required size.
| Backfill Element |
| Gypsum | 75% |
| Bentonite | 20% |
| Sodium Sulphate | 5% |
| Harmful Elements | |
| Cadmium (Cd) | ≤1ppm |
| Arsenicum (As) | ≤1ppm |
| Mercury (Hg) | ≤1ppm |
| Phosphorus (Pb) | ≤10ppm |
Magnesium anode is casted from high-purity magnesium and installed
in a backfill of 75 % gypsum, 20 % Bentonite and 5 % sodium
sulfate. This type of anode produces an open circuit potential of
1.65 - 1.70 volts, which is 20 - 30 % greater than conventional
magnesium anodes. This high driving voltage means greater
protection can be delivered from fewer anodes.
Typical Applications
High potential anodes can be used to protect most underground
buried metallic structures.
They are ideally suited for structures buried in soils with
resistivities in excess of 2000 ohm.cm or containing numerous
corrosion hot spots .
According to the electrochemical principle, cathodic current is
provided from the alloy anode material body through soil, water and
other electrolytes to the protected body such as the steel
structure, so that the protected steel structure is cathodicized to
achieve cathodic protection. As the current continues to flow, the
anode material is continuously consumed. This is the origin of the
name of the sacrificial anode.
Magnesium alloy is an ideal sacrificial anode material because of
its negative anode potential, large electricity generation per unit
mass and long service life. As an ideal sacrificial anode material,
magnesium alloy also has the following characteristics
(1) The specific gravity is small and the potential is relatively
negative
(2) High driving voltage to iron, low current efficiency
(3) Especially suitable for high resistivity medium. (For
resistivity greater than 100Ω·m, it is recommended to use a
strip-shaped magnesium anode)
Applicable environment
Magnesium alloy sacrificial anodes are suitable for corrosion
protection of oil, gas, water supply and drainage pipelines,
underground cables, chemicals, communications, harbors, ships, and
reservoir gates in soil and freshwater media.
Pre-packaged magnesium alloy sacrificial anode
Pre-packaged magnesium alloy sacrificial anode: abbreviated as
pre-packaged magnesium anode or set magnesium anode. In order to
meet the high-tempo and rate construction requirements of
engineering construction, it is assembled on the basis of the
previous single magnesium alloy sacrificial anode, supplemented
with set accessories. Make project construction more convenient and
faster.
1. Pre-packaged magnesium anode product composition: consists of 1
magnesium sacrificial anode ingot, 1 VV-10mm2 cable, 1 filling
material, 1 cotton bag, and 1 plastic woven bag. The bare anode is
first connected to the cable, and the connection part is sealed
with epoxy resin, and then filled in a cotton bag.
2. The function of the magnesium anode filler: it can improve the
environment around the anode and ensure stable and good current
efficiency; reduce the anode grounding resistance and increase the
anode output current; the anode corrosion products dissolve
uniformly and reduce the anode polarization rate; absorb the
surrounding soil moisture, Keep the surrounding area of the anode
moist for a long time; improve the current efficiency and extend
the life of the anode.
Chemical compositions of Magnesium Anode
| Element | Anode type |
| High Potential | AZ63B(HIA) | AZ63C(HIB) | AZ63D(HIC) | AZ31 |
| Mg | Bal | Bal | Bal | Bal | Bal |
| Al | <0.01 | 5.30-6.70 | 5.30-6.70 | 5.0-7.0 | 2.70-3.50 |
| Zn | - | 2.50-3.50 | 2.50-3.50 | 2.0-4.0 | 0.70-1.70 |
| Mn | 0.50-1.30 | 0.15-0.70 | 0.15-0.70 | 0.15-0.70 | 0.15-0.60 |
| Si(max) | 0.05 | 0.10 | 0.30 | 0.30 | 0.05 |
| Cu(max) | 0.02 | 0.02 | 0.05 | 0.10 | 0.01 |
| Ni(max) | 0.001 | 0.002 | 0.003 | 0.003 | 0.003 |
| Fe(max) | 0.03 | 0.005 | 0.005 | 0.005 | 0.005 |
| Other Imp.(max) | Each | 0.05 | - | - | - | - |
| Total | 0.30 | 0.30 | 0.30 | 0.30 | 0.30 |
Electrochemical Properties
TYPE
ITEM | Open Voltage
(-V,SCE) | Close Voltage
(-V,SCE) | Actual Capacity
(A.h/LB) | Efficiency
% |
| High Potential | 1.70-1.78 | 1.50-1.60 | >500 | >50 |
| AZ63 | 1.50-1.55 | 1.45-1.50 | >550 | >55 |
| AZ31 | 1.50-1.55 | 1.45-1.50 | >550 | >55 |
Specification of Magnesium Anodes
| Type | Weight
Kg(ib) | Dimension mm(inch) |
| A | B | C |
| D type | 9D2 | 4.082(9) | 69.9(2 3/4) | 549.3(21 5/8) | 76.2(3) |
| 14D2 | 6.350(14) | 69.9(2 3/4) | 850.9(33 1/2) | 76.2(3) |
| 20D2 | 9.072(20) | 69.9(2 3/4) | 1212.9(47 3/4) | 76.2(3) |
| 9D3 | 4.082(9) | 88.9(3 1/2) | 352.4(13 7/8) | 95.3(3 3/4) |
| 17D3 | 7.711(17) | 88.9(3 1/2) | 641.4(25 1/4) | 95.3(3 3/4) |
| 32D5 | 14.515(32) | 139.7(5 1/2) | 504.8(19 7/8) | 146.1(5 3/4) |
| 48D5 | 21.772(48) | 139.7(5 1/2) | 765.2(30 1/8) | 146.1(5 3/4) |
| 60D4 | 27.216(60) | 114.3(4 1/2) | 114.3(4 1/2) | 1460.5(57 1/2) |
C type | Type | Diameter
(mm) | Length(mm) | Weight(Kg) |
| | High potential | AZ63 | |
| C25 | 75 | 336 | 325 | 2.56 |
| C36 | 114 | 202 | 193 | 3.7 |
| C41 | 114 | 230 | 220 | 4.2 |
| C77 | 114 | 431 | 412 | 7.8 |
| C100 | 114 | 560 | 536 | 10.2 |
| C145 | 146 | 494 | 472 | 14.7 |
| C227 | 178 | 520 | 497 | 22.9 |
| C274 | 114 | 1528 | 1462 | 28.2 |
S type | Type | Weight
Kg(lb) | Dimension mm(inch) |
| | A | B | C | L |
| 3S3 | 1.4(3) | 3 4/5(96.5) | 3(76.2) | 3(76.2) | 4.7(119.4) |
| 5S3 | 2.3(5) | 3 4/5(96.5) | 3(76.2) | 3(76.2) | 7.7(195.6) |
| 9S2 | 4.1(9) | 2 4/5(71.1) | 2(50.8) | 2(50.8) | 28(711.2) |
| 9S3 | 4.1(9) | 3 4/5(96.5) | 3(76.2) | 3(76.2) | 13.6(345.4) |
| 17S2 | 7.7(17) | 2 4/5(71.1) | 2(50.8) | 2(50.8) | 52.5(1333.5) |
| 17S3 | 7.7(17) | 3 4/5(96.5) | 3(76.2) | 3(76.2) | 25.6(650.2) |
| 17S4 | 7.7(17) | 4(101.6) | 3 1/5(81.3) | 4(101.6) | 18(457.2) |
| 20S2 | 9.1(20) | 2 4/5(71.1) | 2(50.8) | 2(50.8) | 62(1574.8) |
| 32S3 | 14.5(32) | 3 4/5(96.5) | 3(76.2) | 3(76.2) | 47(1193.8) |
| 32S5 | 14.5(32) | 5(127.0) | 4 1/5(106.7) | 5(127.0) | 21.2(538.5) |
| 40S3 | 18.1(40) | 3 4/5(96.5) | 3(76.2) | 3(76.2) | 60(1524.0) |
| 48S5 | 21.8(48) | 5(127.0) | 4 1/5(106.7) | 5(127.0) | 31.5(800.1) |
| 60S4 | 27.2(60) | 4(101.6) | 3 1/5(81.3) | 4(101.6) | 62(1574.8) |
Contact us for pricing :
Ms. Vivian Jiang
-----------------------------------------------
China Hunan High Broad New Material Co.Ltd.
70 Chezhan North Road,Changsha, China 410100
Tel:+86-731-85717705 Fax:+86-731-85716569
Mobile/Whatsapp: +86-139-7488-3816
Email: vivian@hbnewmaterial.com
Skype: vivian.jjy
