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1. Superior Electrochemical Capacity & Efficiency
Our Aluminum Sacrificial Anodes provide exceptional electrochemical capacity, typically reaching 2600 to 2800 Ah/kg. Compared to traditional zinc anodes (approx. 780 Ah/kg), aluminum provides over 3.5 times the current output per unit weight. This high efficiency means fewer anodes are required to achieve the same level of protection, reducing the total weight added to the vessel and significantly extending the service life of the system. This makes them the premier choice for long-life sacrificial anodes for ballast tanks and deep-sea infrastructure.
2. Lightweight Design & Cost-Efficiency
Aluminum alloys have a much lower density than zinc, resulting in a 60-70% weight reduction for the same volume of protection. This lightweight characteristic is a major advantage for corrosion protection for offshore platforms and large container ships, where minimizing parasitic weight is crucial for fuel efficiency and structural load management. Furthermore, the lower weight translates to significant savings in logistics, shipping, and underwater installation labor, providing a more cost-effective and manageable solution for large-scale maritime projects worldwide.
3. Advanced Al-Zn-In Alloy Stability
We utilize a precision-engineered Al-Zn-In alloy (Aluminum-Zinc-Indium) to ensure optimal performance. The addition of Indium acts as a critical activator, preventing the formation of a passive oxide film that can halt the sacrificial process. Our anodes maintain a stable driving voltage of approximately -1.10V (vs. Ag/AgCl), ensuring continuous and reliable protection even in varied salinities and temperatures. This technical edge guarantees uniform dissolution, providing consistent marine cathodic protection without localized pitting or premature failure of the anode itself.
4. Environmental Safety & Compliance
Safety and environmental compliance are core strengths of our high-efficiency aluminum anodes for ship hulls. Unlike some anti-corrosion treatments, our aluminum alloys are non-toxic and do not release heavy metal pollutants like cadmium. This makes them perfectly suited for sensitive marine ecosystems and internal environments such as ballast tanks and sea chests. Our products strictly comply with international standards, including U.S. Mil-Spec A-24779(SH) and DNV-RP-B401, ensuring that your operations meet global regulatory requirements while maintaining structural integrity.
The exterior of ship hulls is generally protected by organic coatings. However, anti-corrosion coatings on the bow, rudder and other areas are vulnerable to damage from mechanical operations such as anchoring. Preferential corrosion also tends to occur at riveted joints, welds and other connecting positions. Cathodic protection can significantly mitigate corrosion at these locations. Therefore, adopting sacrificial anodes to implement cathodic protection for ship hulls delivers superior anti-corrosion performance.
Ship hull sacrificial anodes are designed with hydrodynamic profiles to reduce water resistance, providing reliable corrosion protection for all types of vessels navigating global shipping routes, including oil tankers, bulk carriers, tugboats and more.
1. For Hull
(1) Single iron foot welded AH-(1~10)
(2) Double iron foot welded AH-(11~12)
(2) Bolted AH-(13~14)
Model | Anode Size (mm) | Iron Foot Size | Net Weight (kg) | Gross Weight (kg) | Service Life(Years) | |||
|---|---|---|---|---|---|---|---|---|
A*B*C | D | E | F | G | 100% Ballast Condition | |||
AH-1 | 800*140*60 | 900 | 45 | 4~6 | 8~10 | 15.4 | 17.0 | 7 |
AH-2 | 800*140*50 | 900 | 45 | 4~6 | 6~8 | 13.4 | 15.0 | 6 |
AH-3 | 800*140*40 | 900 | 45 | 4~6 | 5~6 | 10.5 | 12.0 | 5 |
AH-4 | 600*120*50 | 700 | 40 | 4~6 | 6~8 | 9.0 | 10.0 | 5 |
AH-5 | 400*120*50 | 460 | 35 | 4~6 | 6~8 | 5.8 | 6.5 | 4 |
AH-6 | 500*100*40 | 580 | 40 | 4~6 | 5~6 | 4.6 | 5.5 | 3 |
AH-7 | 400*100*40 | 460 | 30 | 3~4 | 5~6 | 4.1 | 4.5 | 3 |
AH-8 | 300*100*40 | 360 | 30 | 3~4 | 5~6 | 3.2 | 3.5 | 3 |
AH-9 | 250*100*40 | 300 | 30 | 3~4 | 5~6 | 2.2 | 2.5 | 3 |
AH-10 | 180*70*35 | 230 | 25 | 3~4 | 5~6 | 1.0 | 1.2 | 1 |
AH-11 | 300*150*50 | 360 | 30 | 4~5 | 5~6 | 5.0 | 5.8 | 5 |
AH-12 | 300*150*40 | 360 | 30 | 4~5 | 5~6 | 3.8 | 4.6 | 4 |
AH-13 | 300*150*50 | 250 | 50 | 3~4 | 8~10 | 5.4 | 5.8 | 5 |
AH-14 | 300*150*40 | 250 | 50 | 3~4 | 8~10 | 4.4 | 4.8 | 4 |
2. For Ballast Tank
Model | Anode Size (mm) | Iron Foot Size | Net Weight (kg) | Gross Weight (kg) | Service Life(Years) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
A*(B₁+B₂)*C | D | E | F | G | H | 50% Ballast Condition | 100% Ballast Condition | |||
AT-1 | 500*(115+135)*130 | 800 | 50 | 6 | 40 | 60 | 20.5 | 23.0 | 12 | 6 |
AT-2 | 1500*(65+75)*70 | 1800 | — | φ12 | 20 | 40 | 19.8 | 21.5 | 6 | 3 |
AT-3 | 500*(110+130)*120 | 800 | 50 | 6 | 40 | 60 | 18.0 | 20.0 | 11 | 5 |
AT-4 | 1000*(58.5+78.5)*68 | 1300 | — | φ12 | 20 | 40 | 12.0 | 13.2 | 5 | 2 |
AT-5 | 800*(56+74)*65 | 1100 | — | φ12 | 20 | 40 | 9.0 | 10.0 | 4 | 2 |
AT-6 | 1150*(48+54)*51 | 1450 | — | φ12 | 15 | 35 | 7.6 | 9.0 | 3 | 1 |
AT-7 | 250*(80+100)*85 | 310 | 25 | 4 | 6~8 | 0 | 4.8 | 5.0 | 5 | 2 |
AT-8 | 200*(70+90)*70 | 260 | 25 | 4 | 5~6 | 0 | 2.8 | 3.0 | 3 | 1 |
Notice:
(1) The steel core for AT-7, AT-8 is made of flat bar
(2) The steel core for AT-2, AT-4, AT-5, AT-6 is round bar
3. For Harbour & Offshore Engineering Projects
Model | Anode Size (mm) | Iron Foot Size | Net Weight (kg) | Gross Weight (kg) | Service Life(Years) | ||||
|---|---|---|---|---|---|---|---|---|---|
A*(B₁+B₂)* C | D | F | G | H | 50% Ballast Condition | 100% Ballast Condition | |||
Al-1 | 2300*(220+240)*230 | 2500 | 60 | 110 | 300 | 294.0 | 310.0 | 52 | 26 |
Al-2 | 1600*(200+210)*220 | 1800 | 60 | 90 | 300 | 181.0 | 190.0 | 45 | 20 |
Al-3 | 1500*(170+200)*180 | 1700 | 50 | 80 | 300 | 122.0 | 130.0 | 31 | 15 |
Al-4 | 900*(150+170)*160 | 1100 | 40 | 70 | 300 | 55.0 | 58.0 | 20 | 10 |
4.For Harbour Structures
Model | Anode Size (mm) | Deformed Steel Stanchion Dimension | Flat Steel Stanchion Dimension | Net Weight (kg) | Gross Weight (kg) | Service Life(Years) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
A*(B₁+B₂)* C | D | F | G | D | F | G | H | 50% Ballast Condition | 100% Ballast Condition | |||
Al-5 | 1500*(148+178)*170 | 1800 | φ25 | 65 | 1800 | 50 | 8 | 65 | 114.0 | 120.0 | 30 | 15 |
Al-6 | 850*(180+220)*180 | 1100 | φ25 | 70 | 1100 | 60 | 8 | 70 | 80.0 | 85.0 | 28 | 14 |
Al-7 | 800*(200+280)*150 | 1050 | φ25 | 55 | 1050 | 60 | 8 | 55 | 76.0 | 80.0 | 27 | 13 |
Al-8 | 700*(160+220)*180 | 950 | φ22 | 70 | 950 | 60 | 8 | 70 | 68.5 | 72.5 | 27 | 13 |
Al-9 | 1250*(115+135)*130 | 1500 | φ18 | 45 | 1500 | 40 | 8 | 45 | 52.0 | 56.0 | 17 | 8 |
Al-10 | 1000*(115+135)*130 | 1250 | φ18 | 45 | 1250 | 40 | 8 | 45 | 42.6 | 46.0 | 16 | 8 |
Al-11 | 750*(115+135)*130 | 1000 | φ16 | 45 | 1000 | 40 | 6 | 45 | 33.0 | 35.0 | 14 | 7 |
Al-12 | 500*(115+135)*130 | 750 | φ16 | 45 | 750 | 40 | 4 | 45 | 22.0 | 23.0 | 12 | 6 |
5.For Oil Storage Tanks
Model | Anode Size (mm) | Iron Foot Size | Net Weight (kg) | Gross Weight (kg) | Service Life(Years) | |||
|---|---|---|---|---|---|---|---|---|
A*(B₁+B₂)*C | D | F | G | 50% Ballast Condition | 100% Ballast Condition | |||
AC-1 | 750*(115+135)*130 | 900 | φ16 | 8~10 | 32.0 | 35.0 | 14 | 7 |
AC-2 | 500*(115+135)*130 | 650 | φ16 | 8~10 | 22.0 | 23.0 | 12 | 6 |
AC-3 | 500*(105+135)*100 | 650 | φ16 | 8~10 | 15.0 | 16.0 | 9 | 4 |
AC-4 | 300*(105+135)*100 | 400 | φ16 | 8~10 | 9.7 | 10.0 | 7 | 3 |
For Sea Water Cooling System
(1) Long Strip AE-(1~10)
Model | Anode Size(mm) | Flat Iron Foot Size | Net Weight (kg) | Gross Weight (kg) | Service Life(Years) | ||||
|---|---|---|---|---|---|---|---|---|---|
A*(B₁+B₂)*C | D | E | F | G | 50% Ballast Condition | 100% Ballast Condition | |||
AE-1 | 1200*(200+280)*150 | 1400 | 70 | 10 | 8~10 | 112.0 | 120.0 | 32 | 16 |
AE-2 | 800*(200+280)*150 | 1000 | 60 | 8 | 8~10 | 76.2 | 80.0 | 27 | 12 |
AE-3 | 1000*(115+135)*130 | 1200 | 50 | 6 | 8~10 | 43.2 | 46.0 | 16 | 8 |
AE-4 | 500*(115+135)*130 | 620 | 50 | 6 | 8~10 | 21.5 | 23.0 | 12 | 6 |
AE-5 | 1000*(80+100)*80 | 1200 | 30 | 4 | 6~8 | 19.0 | 20.0 | 8 | 4 |
AE-6 | 500*(105+135)*100 | 620 | 40 | 4 | 8~10 | 15.2 | 16.0 | 9 | 4 |
AE-7 | 500*(80+100)*80 | 620 | 30 | 4 | 6~8 | 9.4 | 10.0 | 6 | 3 |
AE-8 | 400*(110+120)*50 | 500 | 35 | 3 | 5~6 | 6.4 | 7.0 | 4 | 2 |
AE-9 | 300*(140+160)*40 | 360 | 60 | 3 | 5~6 | 4.5 | 5.0 | 4 | 2 |
AE-10 | 200*(90+110)*40 | 250 | 30 | 3 | 5~6 | 2.8 | 3.0 | 2 | 1 |
(2)Disc-shaped AE-(11~16)
Model | Anode Size (mm) | Flat Iron Foot Size | Net Weight (kg) | Gross Weight (kg) | |||||
|---|---|---|---|---|---|---|---|---|---|
A*B | C | D | E | F | G | H | |||
AE-11 | φ300*60 | 40 | 80 | 50 | 12 | 6~8 | 4 | 11.3 | 11.5 |
AE-12 | φ360*40 | 50 | 100 | 70 | 14 | 5~6 | 4 | 8.8 | 9.0 |
AE-13 | φ300*40 | 40 | 80 | 50 | 12 | 5~6 | 4 | 7.3 | 7.5 |
AE-14 | φ200*50 | 35 | 75 | 45 | 10 | 5~6 | 4 | 3.8 | 4.0 |
AE-15 | φ180*50 | 35 | 75 | 45 | 10 | 5~6 | 4 | 3.3 | 3.5 |
AE-16 | φ120*100 | 30 | 75 | 45 | 10 | 8~10 | 4 | 2.3 | 2.5 |
Bracelet Anode
Model | Anode Size(mm) | PL/mm | D/mm | ROD/mm | Net Weight (kg) | Gross Weight (kg) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
ID | OD | L | T | GAP | ||||||
SP-1 | 180 | 250 | 350 | 35 | 60 | 610*35*5 | 6 | φ9*211 | 17.6 | 21.8 |
SP-2 | 230 | 300 | 350 | 35 | 60 | 610*35*5 | 6 | φ9*290 | 22.7 | 27.3 |
SP-3 | 290 | 360 | 350 | 35 | 60 | 610*35*5 | 6 | φ9*384 | 28.9 | 33.8 |
SP-4 | 340 | 410 | 350 | 35 | 100 | 610*35*5 | 6 | φ9*422 | 31.4 | 36.5 |
SP-5 | 370 | 440 | 400 | 35 | 100 | 660*50*5 | 6 | φ9*470 | 39.2 | 46.3 |
SP-6 | 420 | 490 | 400 | 35 | 100 | 660*50*5 | 6 | φ9*548 | 45.1 | 52.5 |
SP-7 | 470 | 560 | 400 | 45 | 100 | 660*75*5 | 8 | φ9*633 | 67.1 | 77.4 |
SP-8 | 520 | 610 | 400 | 45 | 100 | 660*75*5 | 8 | φ9*711 | 74.7 | 85.3 |
1. For Hull
2. For Ballast Tank
3. For Harbour & Offshore Engineering Projects
4. For Harbour Structures
5. For Oil Storage Tanks
6. For Sea Water Cooling System
7. Bracelet Anode
Operating & Installation Guide for Aluminum Sacrificial Anodes
To ensure maximum cathodic protection, follow these essential steps:
1. Surface Preparation: Clean the mounting area on the steel structure to a bright metal finish.
2. Secure Attachment: Securely weld or bolt the aluminum sacrificial anode using the integrated steel inserts. Solid metal-to-metal contact is vital for low-resistance electrical current flow.
3. No Painting: Crucially, never paint the anode surface. Any coating will insulate the alloy and halt the sacrificial process.
4. Inspection: Periodically monitor consumption. Once the anode reaches 80% depletion, schedule a replacement to maintain continuous protection.
Q: Why should I choose aluminum anodes over traditional zinc anodes?
A: Aluminum anodes offer an electrochemical capacity of 2600–2800 Ah/kg, which is over 3.5 times higher than zinc. Additionally, aluminum is about 65% lighter for the same volume of protection. This means fewer anodes are needed, significantly reducing material costs, shipping weights, and the total displacement of your vessel.
Q: Will aluminum anodes become passive and stop working in seawater?
A: No. Our anodes are formulated with a precise Al-Zn-In (Indium) alloy. Indium serves as a critical activator that prevents the formation of a passive oxide layer on the surface. This ensures the anode remains electrochemically active and maintains a stable driving voltage throughout its entire service life, even in varying salinities.
Q: Are aluminum sacrificial anodes environmentally friendly?
A: Yes. Our specialized aluminum alloys are non-toxic and do not release harmful heavy metal pollutants like cadmium, which is sometimes found in traditional zinc anodes. They are safe for use in sensitive marine ecosystems, ballast tanks, and sea chests, ensuring your vessel complies with modern international environmental regulations.
