Trustworthy Aluminum Bracelet Anode Manufacturer
Aluminum bracelet anodes (aluminum bracelet sacrificial anodes) are specifically designed for cathodic protection of subsea/offshore pipelines and cylindrical steel structures. Wstitanium supports semi-shell/segmented structures (supporting different pipe diameters and construction conditions) and offers a variety of aluminum alloy series [optional]. OEM customization is supported according to drawings (STP and PDF). Quality inspection reports are provided (chemical composition/dimensions/weight/appearance), and third-party testing [SGS/BV, etc.] is supported. Aluminum bracelet sacrificial anodes are supplied with steel cores and fasteners as a single unit, enabling rapid project delivery.
Custom Manufacturing
Wstitanium manufactures bracelet anods strictly according to the drawings (STP and PDF) you provide and the specified aluminum and its alloying elements.
Quality Inspection Report
Wstitanium supports third-party testing (SGS/BV, etc.) | Quality inspection reports: electrochemical performance/chemical elements/size/weight/appearance, etc.
MOQ=1
Sample orders and low-volume orders are available. Wstitanium supports the manufacturing of aluminum anodes with various alloy elements.
7*24 Rapid Response
We offer 24/7 inquiry and quotation services. Wstitanium will provide you with a competitive quote within 12 hours. We are available 24/7 to answer your questions.
Fast Turnover
Wstitanium has invested in in-house casting/extrusion factory and has strong die-making capabilities. The capacity to manufacture aluminum anods reaches 3,000 pieces / day.
Support DDP Shipping
Wstitanium supports DHL, FedEx, UPS, as well as air and sea freight. DDP (Delivered Duty Paid) is the preferred solution for customers from Europe and the United States.
What Is Aluminum Bracelet Anode?
Aluminum bracelet anodes are sacrificial anodes specifically designed for cylindrical tubular structures. They are semi-shell or segmented ring-shaped, composed of two or more arc-shaped components joined together to form a closed ring. With advantages such as 360° uniform current distribution, no external power supply required, easy installation, and suitability for complex working conditions in deep sea, tidal flats, and underground applications, bracelet aluminum alloy sacrificial anodes have become one of the preferred corrosion protection solutions for subsea pipelines, risers, steel piles, and storage tanks.
Wstitanium Manufactures Aluminum Bracelet Anodes
To meet the requirements of different pipe diameters, construction methods, and project standards, Wstitanium supports various aluminum bracelet anode structures and matching solutions. You could choose the appropriate structure based on the pipe’s outer diameter, installation window, transportation conditions, and ease of construction. Wstitanium manufactures a full range of aluminum sacrificial anodes strictly according to your drawings. They are used in seawater, marine mud, brackish water, saline soil, and more.
For Bracelet Structure
Half-shell Bracelet Anodes
The half-shell aluminum anode consists of two symmetrical semi-circular components that, when joined, form a complete ring. It is the most commonly used structure for subsea pipelines, suitable for pipe diameters from Φ76mm to Φ1220mm, and is easy to install.
- Φ36~Φ1220mm
Segmented Bracelet Anodes
The segmented bracelet aluminum anode consists of 3 to 6 arc-shaped segments, suitable for extra-large diameter pipes and irregular cylindrical structures. Its circumference can be flexibly adjusted, reducing transportation and installation difficulties. Current distribution is more uniform.
- Φ508~Φ2440mm
Custom Manufacturing Bracelets Anodes
Wstitanium manufactures custom aluminum bracelet anodes based on requirements such as pipe outer diameter (OD), environment (seawater/sea mud/brackish water), lifespan, alloy elements, installation, and whether underwater installation is required.
- Follow Your Drawings
For Bracelet Anode Installation
Bolted Bracelet Anode
Two- or multi-segment anodes are bolted to the pipe without welding. Installation, disassembly, and maintenance are convenient, making it the most commonly used type in engineering projects.
Welding Bracelet Anode
Anodes are welded to protected steel structure, providing a strong connection and stable conductivity. it is often used for permanent installations where subsequent disassembly is not required.
Hoop Bracelet Anode
Anodes are secured to the pipe using specialized clamps. This method offers the simplest installation, flexible pipe diameter compatibility, and suitability for quick and easy installation applications.
Wstitanium manufactures not only aluminum anode bodies (half-shell or segmented), but also steel cores/rings (materials: Q235/carbon steel/stainless steel/as needed, etc.). Matching fasteners (bolts/nuts/washers) and insulating coatings are also available.
For Application
For Marine Projects
- Oil and Gas Extraction Platforms
- Offshore Wind Power Platforms.
- Marine Aquaculture Platforms
- Military Facility Platforms
For Offshore Pipelines
- Oil and Gas Transportation Pipeline
- Natural Gas Subsea Pipeline
- Crude Oil Subsea Pipeline
- Subsea Cable Pipeline
For Shipbuilding
- Rudder Shaft
- Propeller Shaft
- Ballast Water Pipeline
- Subsea Valve Box & Subsea Cooling System
For Petrochemicals
- Chemical Fluid Transport Pipelines
- Storage Tank Annular Base
- Cooling Water Pipes
- List Item #1
For Aquaculture
- Breakwater Steel Pipe Piles
- Aquaculture Platform Columns
- Cage Aquaculture Support Frame
- Oxygen Equipment Ring Structure
For Ports and Terminals
- Gate Shafts
- Trestle Columns
- Wharf Steel Piles
- Mooring Bollards
For Cross-Sea Bridges
- Anchor Protection Sleeve
- Cross-Sea Bridge Piers
- Underwater Pipeline
- Steel Box Girder
For Offshore Wind Power
- Steel Pipe Piles
- Wind Turbine Foundation Piles
- wind Turbine Foundation Jackets
- Submarine Cable Protection Ducts
Advantages of Wstitanium.
Wstitanium-cast aluminum anodes are made with low-iron, high-purity alloys. They strictly adhere to international standards such as NACE, DNV, and ISO. The theoretical capacitance of these aluminum anodes can reach up to 2930 Ah/kg, which is 3 times that of zinc anodes (820 Ah/kg) and 1.3 times that of magnesium anodes (2207 Ah/kg). The actual current efficiency is 85%~95% (≥95% for high-purity aluminum anodes), significantly higher than zinc anodes (65%~75%) and magnesium anodes (50%~60%). For the same protection requirements, Sacrificial anode usage is reduced by 60%~70%, and the total lifecycle cost is reduced by 30%~50%.
Electrochemical Performance
Based on ISO 9351:2025 and DNV-RP-F103, the core performance indicators under seawater conditions at 25℃ are as follows:
- Open Circuit Potential: -1.05V~-1.18V vs Cu/CuSO₄
- Closed Circuit Potential: -1.05V~-1.10V vs Cu/CuSO₄
- Actual Capacitance: ≥2600Ah/kg (High-efficiency type ≥2800Ah/kg)
- Current Efficiency: ≥90% (Maximum ≥95%)
- Annual Consumption Rate: ≤3.4kg/A・Year
- Dissolution: No pitting corrosion, no intergranular corrosion.
Alloying Elements
The alloying elements in the aluminum bracelet anode directly determine its electrochemical performance. The core principles are: Zn regulates the potential, In disrupts the passivation film on the aluminum surface, and Si refines the grain size. Fe/Cu are harmful impurities. Excessive impurities can lead to accelerated anode self-corrosion and decreased current efficiency. Wstitanium’s aluminum anodes strictly adhere to the following alloying standards: Fe ≤ 0.10%, Cu ≤ 0.01%.
GALVALUM III (Al-Zn-In-Si)
| Element | Content (%) |
|---|---|
| Zinc (Zn) | 2.000 ~ 6.000 |
| Indium (In) | 0.010 ~ 0.020 |
| Silicon (Si) | 0.080 ~ 0.200 |
| Iron (Fe) | 0.130 max. |
| Copper (Cu) | 0.006 max. |
| Cadmium (Cd) | — |
| Other Impurities | 0.100 max. |
| Aluminum (Al) | Remainder |
DNV-RP-B401-2011 (Al-Zn-In)
| Element | Content (%) |
|---|---|
| Zinc (Zn) | 2.500 ~ 5.750 |
| Indium (In) | 0.015 ~ 0.040 |
| Silicon (Si) | 0.120 max. |
| Iron (Fe) | 0.090 max. |
| Copper (Cu) | 0.003 max. |
| Cadmium (Cd) | 0.002 max. |
| Other Impurities | 0.100 max. |
| Aluminum (Al) | Remainder |
GS EP COR 201 (Al-Zn-In)
| Element | Content (%) |
|---|---|
| Zinc (Zn) | 4.750 ~ 5.750 |
| Indium (In) | 0.015 ~ 0.020 |
| Silicon (Si) | 0.060 ~ 0.120 |
| Iron (Fe) | 0.120 max. |
| Copper (Cu) | 0.003 max. |
| Cadmium (Cd) | 0.002 max. |
| Other Impurities | 0.100 max. |
| Aluminum (Al) | Remainder |
Core Alloy Systems
The core alloy systems used by Wstitanium to manufacture aluminum anodes are Al-Zn-In, Al-Zn-In-Si, and Al-Zn-In-Mg-Ti.
Al-Zn-In-Si
- Weight: 5~200kg
- Pipe diameter: Φ76~Φ1220mm
- Installation: Bolts / Welding
Aluminum Anodes For Deep-Sea
- Weight: 50~1000kg
- Diameter: Φ508~Φ2440mm
- Steel core: Titanium alloy clad
Al-Zn-In-Mg-Ti
- Weight: 100~800kg
- Core: Q235 Galvanized Steel
- Service life ≥30 years
Pipe Diameter Compatibility Range
Wstitanium and industry-leading aluminum anode sizes cover everything from small pipes to large steel piles, conforming to ISO 9351:2025 dimensional tolerance requirements:
- Small: Φ76~Φ325mm (Civilian pipelines, small ship pipelines);
- Medium: Φ325~Φ1220mm (Submarine oil and gas pipelines, dock steel piles);
- Large: Φ1220~Φ2440mm (Bridge piers for cross-sea bridges, deep-sea jacket structures).
- Width: 50mm, 100mm, 200mm, 300mm, 500mm (customizable);
- Thickness: 25mm, 30mm, 35mm, 50mm, 80mm (customizable).
Single Weight
- Lightweight: 5~50kg (small structure, easy underwater installation)
- Standard: 50~200kg (general pipelines, steel piles);
- Heavy-duty: 200~800kg (large marine engineering, long-life design).
Dimensional Tolerances
- Inner Diameter Tolerance: ±1.5mm
- Length Tolerance: ±2.0mm;
- Thickness Tolerance: ±1.0mm;
- Straightness: ≤0.5mm/m.
Quality Inspection
Quality inspection follows ISO 9351:2025 and NACE SP0492-2016, and is divided into three categories: factory inspection, type inspection, and on-site inspection:
Chemical Element
- AAS, ICP-OES Testing
- Impurities: Fe ≤ 0.10%, Cu ≤ 0.01%
Dimensional Inspection
- Calipers, Measuring Tape
- Tolerances Meet Requirements
Core
- Material: Q235 / Stainless Steel
- Centered Position, No Offset;
Electrochemical Performance
- Open Circuit Potential: -1.05~-1.10V.
- Current Efficiency ≥90%
- Capacity: ≥2600Ah/kg
Mechanical Properties
- Hardness: HB≥60 (cast aluminum alloy)
- Salt Spray Test: No corrosion after 168h.
- 5kg Hammer Impact On Steel Core
On-Site Acceptance
- Drive voltage ≥ 0.25V
- Contact resistance: ≤0.1Ω
- Installation: No Loosening or Deformation.
FAQ
A1: ① Capacitance: Aluminum anodes have 3 times the capacity of zinc anodes, requiring less material; ② Weight: Aluminum anodes have only 1/3 the density of zinc anodes, making installation easier; ③ Lifespan: Aluminum anodes have a lifespan of 15-30 years, while zinc anodes last 8-15 years; ④ Environmental friendliness: Aluminum anode dissolution products are non-toxic, while zinc anodes pose a low risk of pollution; ⑤ Applicable environments: Aluminum anodes are suitable for seawater/saline water/saline soil.
A2: Q235 galvanized steel is preferred. The zinc plating prevents corrosion of the steel core. Titanium alloy is suitable for high-salt deep-sea environments. The steel core must be cast integrally with the anode, centered, to ensure reliable electrical connection.
A3: ISO 9351, NACE SP0492, DNVGL, ABS, GB/T 4948 certifications. Material reports, electrochemical performance reports, and third-party testing reports are provided, conforming to global marine engineering standards.
A4: MOQ can be customized, molds are supported. MOQ=1
The standard lead time is usually 15–30 days (depending on specifications, quantity, and customization).
Inspection reports (COC/COA), chemical element reports, dimensional/weight inspection records, packing lists, etc. SGS/BV/CCIC are supported.
We usually use wooden crates/pallets with moisture protection. Accessories are categorized and clearly labeled, with the outer box marked with item number, batch number, weight, and quantity. For long-distance sea freight and multiple loading/unloading scenarios, we can provide reinforced packaging according to your requirements to minimize transportation risks.
We support EXW/FOB/CIF/DDP, depending on the destination and logistics plan. You can specify the destination port/delivery address and your preferred terms in your inquiry, and we will provide feasible solutions and cost structure suggestions.
