Product Overview
Aluminum ribbon anodes are extruded sacrificial anodes designed for cathodic protection in high-resistivity soils, fresh/brackish water, and specifically for annular spaces of cased pipeline crossings. By providing a continuous electrochemical potential along the pipeline, these anodes prevent stray current interference and internal casing shorts.
Our manufacturing lines utilize direct extrusion technology to bond high-purity aluminum-zinc-indium alloys tightly to a continuous galvanized steel core, ensuring consistent electrical continuity and mechanical durability during installation.
Key Features
Continuous Extrusion Core: Galvanized steel core wire embedded along the entire length provides mechanical strength and low electrical resistance.
High Electrochemical Efficiency: Alloy composition delivers steady current output and prevents premature surface passivation.
Flexible Geometry: Ribbon profile allows easy spooling, bending, and installation in restricted spaces such as pipeline casing annuli.
Traceable Metallurgy: Each production lot includes independent spectrographic analysis verifying trace element thresholds.
Technical Specifications
|
Parameter |
Specification Standard |
|
Alloy Type |
ASTM B843 / MIL-A-24779 (Al-Zn-In series) |
|
Core Material |
Galvanized Steel Wire (ASTM A641) |
|
Open Circuit Potential (OCP) |
-1.10 V to -1.15 V (vs. Cu/CuSO₄) |
|
Current Capacity |
≥ 1100 A·hr/kg |
|
Standard Ribbon Sizes |
3/4" × 1", 1" × 1 1/4" (Custom sizes available) |
|
Core Diameter |
3.2 mm (0.125") standard |
Materials & Available Options
| Alloy Composition | Indium (In): 0.016% - 0.040% Zinc (Zn): 2.00% - 6.00% Silicon (Si): ≤ 0.12% Copper (Cu): ≤ 0.006% Iron (Fe): ≤ 0.09% Aluminum (Al): Remainder |
| Packaging Lengths | Standard wooden reels of 100 lbs (45 kg) or 500 lbs (226 kg). |
| Surface Condition | Clean, oxide-free extruded finish ready for exothermic welding. |
Applications
Cased Pipeline Crossings: Installed in the annular space between carrier pipes and casing pipes to mitigate internal corrosion risks.
Underground Storage Tanks (USTs): Perimeter cathodic protection in high-resistivity soil backfill.
Marine Infrastructure: Sheet piles, bulkheads, and submerged structures in brackish or marine environments.
Customization Options
Cross-Sectional Dimensions: Tailored ribbon widths and thicknesses to meet specific casing clearance requirements.
Core Wire Material: Options for stainless steel core wires upon project request.
Coil Weight & Packaging: Customized reel lengths to match contractor handling equipment and minimize job-site waste.
Quality Control & Manufacturing Capabilities
Note for web layout: Recommend placing real factory shop-floor photos of direct-extrusion presses or optical emission spectrometers here.
Melting & Alloying: Induction melting furnaces equipped with direct-reading spectrometers verify chemical composition prior to casting.
Extrusion Monitoring: Hydraulic presses apply controlled pressure and cooling rates to guarantee uniform metallurgical grain structure and prevent core-metal separation.
Electrochemical Testing: Random sampling per production heat tested in accordance with ASTM G97 for current capacity and potential output.
Third-Party Inspection: Full cooperation with client-appointed inspection agencies (e.g., SGS, BV, TUV) for pre-shipment verification and testing.
Documentation: Mill Test Certificates (MTC) supplied with every shipment, referencing heat numbers and chemical analysis.
Packaging & Shipping
Reel Specifications: Wound securely on heavy-duty wooden spools or steel reels to prevent kinking or damage to the steel core.
Protection: Wrapped in moisture-resistant barrier film and secured on ISPM 15-compliant heat-treated wooden pallets.
Logistics Support: Export packaging certified for ocean container transport and air freight. Standard ex-works or FOB delivery terms available.
Frequently Asked Questions
Q: What is the primary advantage of aluminum ribbon anodes over magnesium ribbon anodes?
A: Aluminum ribbon anodes offer higher current capacity per unit weight and are cost-effective in environments with lower resistivity or specific chloride concentrations, whereas magnesium is typically reserved for high-resistivity dry soils.
Q: How is electrical connection made to the pipeline or test station?
A: Connection is established by stripping the aluminum to expose the internal steel core wire, then attaching a copper cable via thermite welding (cadwelding) or mechanical compression connectors.
Q: What standards do your aluminum ribbon alloy compositions follow?
A: Our production strictly adheres to ASTM B843 and MIL-A-24779 specifications. Spectrographic test results are included in the documentation package.
Q: Can the ribbon be easily bent around tight radii during casing installation?
A: Yes. The ductile aluminum extrusion combined with a central steel core allows the ribbon to be coiled and shaped on-site without cracking or core separation.
Q: What is the minimum order quantity (MOQ) for custom sizes?
A: MOQs vary based on cross-section dimensions and alloy type, typically starting at 500 lbs (227 kg) per production run. Contact our engineering team for exact run requirements.
Q: What lead time is standard for bulk orders?
A: Standard production lead times range from 2 to 4 weeks, depending on order volume and factory scheduling. Expedited manufacturing slots can be arranged for urgent project deadlines.
Request a Quote (RFQ)
To receive a formal quotation, please provide the following technical details:
Alloy Specification: (E.g., ASTM B843)
Dimensions: (Ribbon width × thickness, core diameter)
Total Quantity: (Total weight in lbs/kg or linear footage)
Destination Port / Job Site Zip Code:
Required Documentation: (E.g., MTC, third-party inspection requirements)
Submit inquiries directly to our engineering sales desk for response within 24 hours.
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