Galvanic Anode Galvanic anode is also called 'sacrificial anode', is used to protect the hulls of ships, water heaters, pipelines, distribution systems, above-ground tanks, underground tanks, and refineries. The anodes in sacrificial anode cathodic protection systems must be periodically inspected and replaced when consumed.
Galvanic Anode
Galvanic anode is also called 'sacrificial anode', is used to protect the hulls of ships, water heaters, pipelines, distribution systems, above-ground tanks, underground tanks, and refineries. The anodes in sacrificial anode cathodic protection systems must be periodically inspected and replaced when consumed.
Classified by Usage:
1. Welding Type Sacrificial Anode for Ship Hull (Single Iron Foot)
2. Welding Type Sacrificial Anode for Ship Hull (Double Iron Foot)
3. Bolt Connection Type Sacrificial Anode for Ship Hull
4. Sacrificial Anode for Ballast Water Tank
5. Sacrificial Anode for Offshore Engineering Facilities
6. Sacrificial Anode for Harbor Engineering Facilities
7. Strip Shape Sacrificial Anode for Seawater Cooling System
8. Disc Shape Sacrificial Anode for Seawater Cooling System
9. Sacrificial Anode for Storage Tank
Classified by Shapes: Plates, Rods, Extruded Ribbon, Blocks
Classified by Main Material:
1.Magnesium Alloy Sacrificial Anode
Magnesium alloy sacrificial anode is suitable for the anti-corrosion protection of oil, gas, water supply and drainage pipelines in underground fresh water, underground cables, chemical industry, communication, harbor, ship, reservoir and other projects.
Chemical Composition
Grade |
Alloying Elements |
Impurity Elements (no greater than) |
|||||||
Al |
Zn |
Mn |
Mg |
Fe |
Cu |
Ni |
Si |
Ca |
|
MGAZ63B |
5.3-6.7 |
2.5-3.5 |
0.15-0.60 |
margin |
0.003 |
0.01 |
0.001 |
0.08 |
- |
MGAZ31B |
2.5-3.5 |
0.60-1.4 |
0.20-1.0 |
margin |
0.003 |
0.01 |
0.001 |
0.08 |
0.04 |
MGM1C |
≤0.01 |
- |
0.50-1.3 |
margin |
0.01 |
0.01 |
0.001 |
0.05 |
- |
MG |
≤0.02 |
≤0.03 |
≤0.01 |
≥99.9% |
0.005 |
0.004 |
0.001 |
0.01 |
- |
Electrochemical Performance
Grade |
Open Circuit Potential |
Closed Circuit Potential |
Actual Capacitance |
Current Efficiency |
-V,Cu/CuSO4 |
-V,Cu/CuSO4 |
-(A*h/kg) |
% |
|
MGAZ63B |
1.57-1.67 |
1.52-1.57 |
≥1210 |
≥55 |
MGAZ31B |
1.57-1.67 |
1.47-1.57 |
≥1210 |
≥55 |
MGM1C |
1.77-1.82 |
1.64-1.69 |
≥1100 |
≥50 |
Standard Specification for Magnesium Anode
Size |
Specification |
Weight (kg) |
Length*(upper bottom+lower bottom)*Height |
||
MG-22 |
700×(130+150)×125 |
22.00 |
MG-14 |
700×(120+100)×102 |
14.00 |
MG-11 |
700×(110+90)×88 |
11.00 |
MG-8 |
700×(95+75)×75 |
8.00 |
MG-4 |
350×(95+75)×75 |
4.00 |
MG-2 |
350×(55+60)×55 |
2.00 |
Note: size can also be produced according to customer’s requirements |
Chemical Composition
Alloy Type |
Zn |
In |
Cd |
Sn |
Mg |
Si |
Ti |
Impurity, ≤ |
Al |
||
Si |
Fe |
Cu |
|||||||||
Al-Zn-In-Sd |
2.5-4.5 |
0.018-0.050 |
0.005-0.020 |
- |
- |
- |
- |
0.10 |
0.15 |
0.01 |
margin |
Al-Zn-In-Sn |
2.2-5.2 |
0.020-0.045 |
- |
0.018-0.035 |
- |
- |
- |
0.10 |
0.15 |
0.01 |
margin |
Al-Zn-In-Si |
5.7-7.0 |
0.025-0.035 |
- |
- |
- |
0.10-0.15 |
- |
0.10 |
0.0-15 |
0.01 |
margin |
Al-Zn-In-Sn-Mg |
2.5-4.0 |
0.020-0.050 |
- |
0.025-0.075 |
0.50-1.00 |
- |
- |
0.10 |
0.15 |
0.01 |
margin |
Al-Zn-In-Mg-Ti |
4.0-7.0 |
0.020-0.050 |
- |
- |
0.50-1.50 |
- |
0.01-0.08 |
0.10 |
0.15 |
0.01 |
margin |
Electrochemical Properities
Type/Index/Performance |
Open Circuit Potential-V(SCE) |
Working Potential-V(SCE) |
Actual Capacitance(A.h/kg) |
Current Efficiency% |
Dissolution Status |
Ordinary Aluminum Alloy Sacrificial Anode |
1.10-1.18 |
1.05-1.12 |
≥2400 |
≥85 |
Corrosion products are easy to fall off, the surface dissolution is even |
High Efficiency Aluminum Alloy Sacrificial Anode |
1.10-1.18 |
1.05-1.15-2 |
≥2600 |
≥90 |
|
Highly Activated Aluminum Alloy Sacrificial Anode |
1.45-1.50 |
1.40-1.45 |
≥2080 |
≥70 |
Chemical Composition (%)
Chemical Element |
Al |
Cd |
Impurity Element |
Zn |
|||
Fe |
Cu |
Pb |
Si |
||||
Content |
0.3~0.6 |
0.05~0.12 |
≤0.005 |
≤0.005 |
≤0.006 |
≤0.125 |
margin |
Electrochemical Properties
Electrochemical Properties |
Open Circuit Potential V |
Working Potential V |
Actual Capacitance (Ah/kg) |
Consumption Rate (Ah/kg) |
Current Efficiency % |
Dissolution Performance |
In Sea Water (1mA/cm2) |
-1.09~-1.05 |
-1.05~-1.08 |
≥780 |
≤11.23 |
≥95 |
Surface dissolution is even, while the corrosion products are easy to fall off |
In Soil (0.03mA/cm2) |
≤-1.05 |
≤-1.03 |
≥530 |
≤17.25 |
≥65 |
Electrochemical Properities
Type/Index/Performance |
Open Circuit Potential-V(SCE) |
Working Potential-V(SCE) |
Actual Capacitance(A.h/kg) |
Current Efficiency% |
Dissolution Status |
Ordinary Aluminum Alloy Sacrificial Anode |
1.10-1.18 |
1.05-1.12 |
≥2400 |
≥85 |
Corrosion products are easy to fall off, the surface dissolution is even |
High Efficiency Aluminum Alloy Sacrificial Anode |
1.10-1.18 |
1.05-1.15-2 |
≥2600 |
≥90 |
|
Highly Activated Aluminum Alloy Sacrificial Anode |
1.45-1.50 |
1.40-1.45 |
≥2080 |
≥70 |
Chemical Composition
Product Name |
Chemical Element (%) |
Impurity Content (%) |
|||||
Si |
Cr |
Mn |
C |
Fe |
P |
S |
|
High Silicon Cast Iron |
14~16 |
- |
0.6~0.8 |
0.8~1.05 |
margin |
≤0.25 |
≤0.1 |
Ferrochrome Silicon |
14~16 |
4.0~4.5 |
0.6~0.8 |
0.8~1.05 |
margin |
≤0.25 |
≤0.1 |
Electrochemical Performance
Product Name |
Use Environment |
Working Current Density (A/m2) |
Consumption Rate (kg/A.a) |
High Silicon Cast Iron |
In seawater |
50 |
0.3~1.0 |
Ferrochrome Silicon |
In fresh water/soil |
10 |
0.05~0.2 |
Specifications and Sizes
Number |
Specification mm |
Weight kg |
Anode Cable |
|
Section mm2 |
Length mm |
|||
1 |
Φ50×1500 |
22 |
25 |
1000 |
2 |
Φ75×1200 |
40 |
25 |
1000 |
3 |
Φ75×1500 |
50 |
25 |
1000 |
4 |
Φ100×1500 |
90 |
25 |
1000 |
Electrochemical Properties
Performance /Type /Indicator |
Open circuit potential |
Working potential |
Actual capacity A·h/kg |
Current efficiency |
Dissolution condition |
Ordinary aluminum alloy anode |
1.10-1.18 |
1.05-1.12 |
≥2400 |
≥85 |
Corrosion products are easy to fall off and the surface dissolves evenly. |
High efficiency aluminum alloy anode |
1.10-1.18 |
1.05-1.12 |
≥2600 |
≥90 |
|
Highly activated aluminum alloy anode |
1.45-1.50 |
1.40-1.45 |
≥2080 |
≥70 |