Miscellaneous Application Anodes for Custom Marine & Steel Structure Protection
RELI SLEEVE manufactures miscellaneous application anodes for cathodic protection of steel structures operating in seawater and marine environments. These anodes are developed for specialized installation conditions where standard anode configurations may not be suitable.
CUSTOM ANODE SOLUTIONS
Product Introduction
Miscellaneous application anodes are sacrificial anodes developed for steel structures in seawater where the protection system requires a configuration different from conventional jacket, pipeline bracelet or hull anodes.
These anodes can be engineered around the installation arrangement, available space, structural geometry, electrical continuity and cathodic protection requirements of the asset. RELI SLEEVE has the manufacturing and technical capability to produce specialized anode shapes including cylindrical and spherical configurations.
The product category can also include retrofit anodes and anodes associated with monitoring systems where replacement, localized protection or specialized installation is required.
Key Features
Custom Geometry
Anodes can be manufactured in different shapes according to installation, structural geometry and approved project requirements.
Cylindrical Anodes
Cylindrical configurations can be developed for applications where a compact or specialized geometry is required.
Spherical Anodes
Spherical configurations can be considered for specialized marine structures and application-specific cathodic protection arrangements.
Retrofit Applications
Retrofit anodes can be designed for existing structures requiring additional or replacement cathodic protection.
Monitoring System Applications
Specialized anode arrangements can be manufactured for systems incorporating monitoring and inspection requirements.
Project-Specific Manufacturing
Dimensions, configuration and installation details can be developed according to approved client drawings and CP design.
Technical Specification
| Product Type | Miscellaneous / Custom Application Sacrificial Anode |
|---|---|
| Protection Method | Sacrificial Cathodic Protection |
| Primary Application | Steel Structures in Seawater and Marine Environments |
| Available Materials | Aluminium Alloy / Zinc Alloy, as applicable to the approved CP design |
| Available Shapes | Cylindrical, Spherical and Other Custom Configurations |
| Retrofit Configuration | Available for Existing Structures as per Project Requirement |
| Monitoring System Anodes | Application-Specific Configuration |
| Dimensions | As per Approved Engineering Drawing and CP Design |
| Installation | As per Structure, Anode Type and Approved Installation Procedure |
| Electrical Continuity | As Required by Cathodic Protection Design |
| Operating Environment | Seawater / Marine Environment |
| Design Life | As per Approved Cathodic Protection Design |
Grades & Standards
Chemical Composition
Aluminium and zinc anodes can be manufactured according to applicable alloy standards, approved project specifications and client requirements. The following compositions represent the available reference specifications.
Aluminium Anodes
| Element | Galvalum III (Eqv.) | DNV & ISO | Alanode |
|---|---|---|---|
| Zn | 2.0–6.5 | 2.5–5.75 | 0.50–5.00 |
| In | 0.01–0.02 | 0.016–0.04 | 0.005–0.05 |
| Si | 0.08–0.20 | 0.12 Max. | 0.10 Max. |
| Fe | 0.12 Max. | 0.09 Max. | 0.13 Max. |
| Cu | 0.006 Max. | 0.003 Max. | 0.01 Max. |
| Cd | 0.002 Max. | — | — |
| Others (Each) | 0.02 Max. | 0.02 Max. | 0.02 Max. |
| Others (Total) | 0.06 Max. | — | — |
| Al | Remainder | Remainder | Remainder |
Zinc Anodes
| Element | US Mill Spec | ASTM B148-II |
|---|---|---|
| Al | 0.10–0.50 | 0.005 Max. |
| Si | 0.125 Max. | — |
| Cd | 0.025–0.15 | 0.03 Max. |
| Fe | 0.005 Max. | 0.0014 Max. |
| Pb | 0.006 Max. | 0.003 Max. |
| Cu | 0.005 Max. | 0.002 Max. |
| Zn | Remainder | Remainder |
Final alloy chemistry is selected according to the applicable material specification, cathodic protection design and approved customer requirements.
Electrochemical Performance
Electrochemical performance depends on the selected alloy, operating environment and cathodic protection design. The following reference characteristics apply to aluminium anodes operating in seawater at 23°C.
| Operating Environment | Seawater at 23°C |
|---|---|
| Open Circuit Potential | More negative than -1.1 V w.r.t. Ag/AgCl |
| Closed Circuit Potential | More negative than -1.05 V w.r.t. Ag/AgCl Reference Electrode |
| Anode Capacity | 2550–2750 A.hr/Kg |
Applications
- Marine Steel Structures
- Offshore Structural Components
- Specialized Seawater Applications
- Retrofit Cathodic Protection Systems
- Existing Structures Requiring Anode Replacement
- Monitoring System Applications
- Custom Marine Installations
- Project-Specific Steel Structures
Product Advantages
Application Flexibility
Suitable for specialized cathodic protection requirements where standard anode geometries are unsuitable.
Custom Engineering
Configuration can be developed around project drawings, installation limitations and CP requirements.
Retrofit Capability
Suitable for selected existing structures requiring additional or replacement sacrificial anodes.
Multiple Geometries
Cylindrical, spherical and other application-specific shapes can be considered.
About RELI SLEEVE
Reliable Group Experience Since 1975
RELI SLEEVE is part of the Reliable Group, which has served the Oil & Gas, Petrochemical, Power, Water, Infrastructure and Process Industries for more than five decades. Beginning as a trading business supplying steel pipes, plates and industrial raw materials, the Group evolved into an international organization involved in trading, importing, manufacturing, exporting and engineering solutions.
The Group's flagship Reliable Pipes & Tubes Ltd. supplies stainless steel, carbon steel, alloy steel and special steel products including pipes, tubes, fittings, flanges, plates, coils, bars and industrial components. RELI SLEEVE was established as a specialized division for corrosion protection and internal coating solutions, serving Oil & Gas companies, EPC contractors and pipeline operators.
Building on this foundation, RELI SLEEVE has expanded into advanced anode products and cathodic protection systems. This development strengthens the Group's ability to provide broader pipeline integrity and asset protection solutions for customers in India and international markets.
Frequently Asked Questions
What are miscellaneous application anodes?
Miscellaneous application anodes are sacrificial anodes developed for specialized cathodic protection applications where a conventional anode configuration may not meet the installation or structural requirements.
What shapes can RELI SLEEVE manufacture?
RELI SLEEVE has the capability to manufacture different anode shapes, including cylindrical and spherical configurations, based on approved client requirements.
Are retrofit anodes available?
Yes. Retrofit anodes can be developed for suitable existing structures where additional or replacement cathodic protection is required.
Can these anodes be designed for monitoring systems?
Specialized anode configurations can be manufactured for applications incorporating monitoring requirements, subject to the approved project design.
Which materials are available?
Aluminium alloy and zinc alloy anodes can be considered depending on the seawater environment, cathodic protection design and applicable specification.
Can anodes be manufactured according to customer drawings?
Yes. Dimensions, geometry, installation arrangement and other project-specific requirements can be developed according to approved customer drawings and engineering specifications.
Where are miscellaneous application anodes used?
They can be used for specialized marine and seawater steel structures, retrofit protection systems, monitoring applications and other project-specific cathodic protection requirements.
Need a Special Anode Configuration?
Share your structure details, dimensions, installation requirements or approved drawing with RELI SLEEVE for a project-specific sacrificial anode solution.
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