Magnesium Sacrificial Anode for Underground Pipeline , against corrosion
Packaged Anodesare prepack ineither bags orcardboardcartons in lowresistivity,quick wetting, prepared back fill consisting of 75%hydratredgypsum,20% bentonite, and 5%sodium sulphate.Connecting Wire: Standard10 feet of solid or stranded#12 AWG Copper LeadWire.
Anode Type Alloying element Inclusion(max)
Al Zn Mn Mg Fe Cu Ni Si Other Imp.
MGAZ63B 5.3-6.7 2.5-3.5 0.15-0.60 Bal. 0.003 0.01 0.001 0.08 - 0.30
MGAZ31B 2.7-3.5 0.6-1.3 0.2-1.0 Bal. 0.03 0.01 0.001 0.08 0.05 0.30
MGMIC 0.01(max) - 0.5-1.3 Bal. 0.01 0.01 0.001 0.05 0.05 0.30
Anode Type Open-circuit-V(Cu/CuSO4) Current efficiency%
(Cu/CuSO4) Generating current amount
MGAZ63B 1.57-1.67 ≥ 55 ≥ 1210
MGAZ31B 1.57-1.67 ≥ 55 ≥ 1210
MGMIC 1.77-1.82 ≥ 50 ≥ 1100
Chemical compositions of cast magnesium anodes:
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
1) Magnesium Casting Anode
Grade: AZ63, AZ31, MGM1C
Main application: Sacrificed magnesium anode suitable applies in the fields of anticorrosion. Such as: Oil, gas, water transmission in underground or fresh water, underground cable, chemical, communication, bay, watercraft and reservoir strobe.
2) Magnesium extruded anodes
Grade: AZ63, AZ31, MGM1C
Main application: Water heaere, water container, pre-polarization of steel structure in seawater, gas pipe, anticorrosion of steel and iron structure where high resistant and electrolyte (soil and water) existed.
3) Ribbon Anode
Main application: Ribbon anodes are used for the cathodic protections of sleeved pipings, tanks and pipe networks ad grounding grids guarding against heavyy current interfereence. And temporaly cahodic protection of pipings.
4) Aluminum Anode
Type: AL-Zn-In-CD AL-Zn-In-Sn Al-Zn-In-Si
Main Application: Aluminum anodes are suitable for the cathodic protection for such metal structures as ships, machinery, offshore engineering, harbor facilities, and pipings and cables in an ooze corrosion environment.
5) Zinc Anode
Main Application: Zinc anodes are sitable for the cathodic protection for ships machinery, offshore engineering and harbor facilities in seawater and fresh seawater andd for pipes and cables embeded in soil with cower resistivity.
6) High Silicon cast iron anode
Type: High silicon cast iron Cr-containing silicon iron
Main Application: It is widely aplied to the impressed current cathodic protection of oil drilling platform at sea. Bried pipings anad cables under ground.
Above bare Mg anodes could be supplied after being prepackaged. The bare Mg anodes will be assembled with cable and sealed with epoxy resin, and packaged in cotton bag.
As the prepackaged anodes are buried under the ground, if there is any harmful element in the backfill of prepackaged anodes, this element will leak to the earth and groundwater when the anode is used, which will pollute the environment.
CORRTECH prepackaged anodes are 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 with cable size: 6mmsq, 10mmsq, 16mmsq.
Composition of Backfill
Anhydrous Sodium Sulphate: 5%
Harmful elements in backfill:
CD (max) As (max) Hg (max) Pb (max)
1ppm 1ppm 1ppm 10ppm
Usage: Magnesium Sacrificial Anode has a very wide protection in vessels, ports constructions, ocean projects, underground cables, gas and water supply systems, drainage lines, chemicals, telecommunications, water boiler, heat exchanger, vapourater, etc.
Al-Zn-In alloy sacrifical anode is applied for the cathodic protction of vessel, mechanic equipment, Ballast Tank, tank inner, seashore facility, seabed pipeline, dock steel peg, ocean platform and cable ect. Which applied for the seawater as the medium.
NOTE: If there is no the size which you need, please give us your Drawing and the size of the anode, we will make the anode by your information.
July 7, 2016
Below are the results from the electrochemical evaluation of the cast 9D3 magnesium anode. The heat number is 31502101-004 with a P.O. # HB. The testing was done in accordance with ASTM G-97 (Laboratory Evaluation of Magnesium Sacrificial Anode Test specimens for Underground Applications ).
Closed / Open Circuit Potential -volts SCE Current Capacity
Sample # 24 hour 7-day 14-day amp/hrs/lb % Efficiency
|- 1||1.54||1.58||1.58 / 1.74||546 54.6|
|- 2||1.55||1.58||1.58 / 1.74||551 55.1|
|- 3||1.55||1.58||1.58 / 1.74||542 54.2|
|- 4||1.54||1.58||1.58 / 1.74||549 54.9|
|- 5||1.55||1.58||1.58 / 1.74||540 54.0|
|Control HP||1.55||1.56||1.56 / 1.70||524 52.4|