Aluminium Anodes by GESIT

Manufactured using high purity INALUM aluminium and compliant with DNV, ISO, BKI, NACE/AMPP standards or customable as per project specification.

Aluminium Anodes Overview

GESIT Aluminium Anodes are engineered for long-lasting (as per design life), high-efficiency cathodic protection (CP) in seawater and brackish water environments. Manufactured with high-purity aluminium and compliant with international standards (DNV, ISO, BS EN, NACE/AMPP or BKI), our anodes are trusted by offshore operators, marine contractors, shipping companies, EPC companies, and shipyards across various industries.

If your project requires reliable corrosion protection for offshore platforms, pipelines, jetty structures, or marine vessels, GESIT provides complete aluminium anode solutions—customizable to any specification.

Aluminium Anodes General Characteristic

In seawater and brackish environments, the commonly used sacrificial anodes are Aluminium Anodes and Zinc Anodes. The key characteristics of Aluminium Anodes are:

Significantly higher electrochemical capacity (≈2,500 Ah/kg vs. Zinc ≈720 Ah/kg), allowing lower net anode weight for the same protection current
Lower material density than Zinc.
Suitable for seawater, brackish water, and sea-mud / marine sediment environments
Not recommended for freshwater or soil due to insufficient driving potential

Applications of Aluminium Anode

Aluminium Anodes are used for corrosion protection in:

Offshore platforms (jacket, topside, subsea equipment)
Subsea pipelines & risers
Jetty pile, pontoon, and floating dock structures
Ship hull, rudder, propeller, ballast tank, and bow thruster
Seawater/brackish water storage tanks
Any submerged or buried steel structure in marine or offshore environments

GESIT Aluminium Anodes

Quality & Manufacturing Advantages

High-purity ingot (first-grade raw aluminium from INALUM).
Strict control of alloy chemistry and casting quality.
Low porosity, low impurity, mercury-free.
Available in custom shapes, dimensions, and insert configurations.
Supported by Supported by experienced and AMPP Certified Cathodic Protection engineers
High local content value (TKDN) for Indonesia – based project.

Chemical Composition of Aluminium Anodes Options

GESIT can supply Aluminium Anodes with the following alloy and performance options:

GESITAL Alloy — a high-performance aluminium alloy developed through GESIT’s in-house R&D
Industry-standard alloys (DNV, ISO, BS EN, NACE/AMPP, BKI).
Custom alloys tailored to project-specific requirements.

Engineering & Technical Support

GESIT provides comprehensive engineering and technical assistance:

Cathodic Protection system engineering design & calculation (offshore, subsea, marine).
Alloy selection & performance verification.
Custom dimensions, mounting systems & installation method guidance.
Project-specific documentation, drawings, and QA/QC reports.

1. Aluminium Bracelet Anode

Designed specifically for cylindrical structures such as subsea pipelines and jetty piles, Aluminium Bracelet Anodes ensure uniform current distribution and long stable service as per design life.

The anodes are fully customizable in weight, dimensions, and alloy (chemical composition & electrochemical performance) according to design calculations or project specifications provided by the client.

Aluminium Bracelet Anodes Shape:

Aluminium Bracelet Anode Square Ends Type (ABASET)
Aluminium Bracelet Anode Tapered Ends Type (ABATET)

Applications

ABASET is used for cylindrical offshore structures such as jetty piles, risers, dog legs, and submarine pipelines with concrete weight coating (CWC).
ABATET is used for submarine pipelines without concrete weight coating (CWC).
In seawater or sea mud environment.

Installation Method

For Submarine Pipelines:

Installed at coating yard.
CP cable connection to pipeline via thermite welding, T-tab or bolted system connection.

For Jetty/Steel Pipe Piles:

Installed on-site by certified diver
Extension core welded to pile, secured with GESIT U- or Y-Mounting Anti-Theft System

2. Aluminium Long Slender Anode (ALSA)

Aluminium Long Slender Anodes (ALSA) are aluminium slender anodes with a length of at least four times the radius (length ≥ 4 × radius). The anodes are used in a wide range of offshore, inshore, and internal tank applications.