Custom MMO Titanium Anodes for Electrolysis & Cathodic Protection
Ru-Ir and Ir-Ta mixed metal oxide coated titanium anodes engineered for chlorine evolution, oxygen evolution, cathodic protection, electrochlorination, water treatment, electrowinning, and industrial electrolysis projects.
Define the MMO Anode Design Basis First
Before selecting an MMO coating or anode form, define the target electrochemical duty, operating environment, electrical requirement and installation conditions.
These inputs establish the engineering basis for coating and geometry selection.
Coating and Form Should Be Selected Together: The same MMO coating can require different anode geometry, active area, electrical connection and inspection scope depending on the process or installation environment.
Target Reaction or Protection Duty
For electrolysis, identify the dominant anodic reaction. For cathodic protection, define the protected structure and required protection duty before selecting the MMO system.
Review: CER · OER · Cathodic Protection · Process ObjectiveElectrolyte or Installation Environment
Electrolyte chemistry or the CP installation environment should be reviewed because both coating direction and anode configuration depend on the actual service conditions.
Review: Chloride · pH · Acids / Sulfates · Soil · Seawater · ConcreteElectrical Duty
Current density, total current or required CP output should be defined against the effective active area, active length and system design.
Review: Current Density · Total Current · Linear Output · Active Area / LengthGeometry, Connection & Design Life
Installation space, anode form, electrical connection and design-life requirement should be reviewed together before the final geometry and coating specification are confirmed.
Review: Anode Form · Dimensions · Cable / Connection · Installation · Design LifeCoating Selection
Based on reaction type
Current Density Review
Matched to operating conditions
Batch Documentation
Records based on order requirements
Choose MMO Coating by Reaction & Service Environment
Start with the dominant anodic reaction for electrolysis applications and with the installation environment and current-output requirement for cathodic protection. Final coating selection depends on chemistry, electrical duty, temperature and operating conditions.
Ru-Ir MMO for Chlorine-Evolution Duty
Ru-Ir mixed-metal-oxide coatings are primarily reviewed when chlorine evolution is the intended anodic reaction in a defined chloride-containing electrolyte.
Ir-Based / Ir-Ta MMO for Oxygen-Evolution Duty
Ir-based and Ir-Ta MMO coatings are generally the more relevant starting point where oxygen evolution is the dominant anodic reaction and the electrolyte and electrical duty are clearly defined.
MMO Anodes for Impressed-Current Cathodic Protection
For ICCP systems, coating and anode form should be reviewed from the protected structure, installation environment, required current output, electrical connection and design-life basis rather than from CER or OER terminology alone.
Which MMO Direction Should You Review First?
| Project Direction | Starting Direction | Key Engineering Inputs |
|---|---|---|
| Chlorine Evolution | Ru-Ir MMO | Chloride · pH · Current Density · Temperature |
| Oxygen Evolution | Ir-Based / Ir-Ta MMO | Electrolyte · pH · Current Density · Temperature |
| Cathodic Protection | Environment-Specific MMO | Environment · Required Output · Form · Installation · Design Life |
Application Name Alone Does Not Define the MMO Coating
“Electrolysis,” “water treatment” or “cathodic protection” does not by itself define the final MMO coating. The dominant reaction, electrolyte or environment, electrical duty, temperature and operating conditions should be confirmed before the coating family is finalized.
Chloride Presence Does Not Automatically Mean Ru-Ir
The presence of chloride alone is not sufficient to define the coating family. The dominant anodic reaction and complete process chemistry should be reviewed before Ru-Ir or an OER-oriented coating is selected.
Help Me Select the MMO Coating
Send Electrolyte or CP Design Data
MMO Anode Types by Form
Choose the anode form according to current-distribution requirements, installation geometry, active area, environment and electrical connection. Each product form links to a dedicated page for detailed specifications and application data.
MMO Wire Anodes
Flexible or formed MMO wire anodes can be reviewed for distributed-current applications and installations where routing, active length and electrical termination must follow the structure or equipment geometry.
Wire Diameter · Active Length · Current Output · Cable / Connection · Environment
MMO Disc Anodes
Compact MMO disc anodes provide a defined active face for projects requiring localized current delivery, controlled mounting geometry or compact electrode installation.
Diameter · Active Surface · Mounting · Connection · Required Output
MMO Tubular Anodes
MMO tubular anodes provide cylindrical active geometry and can be engineered around active length, current output, cable connection and installation environment.
Diameter · Length · Active Length · Current Output · Cable · Installation
MMO Ribbon Anodes
MMO ribbon anodes provide a flat, distributed electrode geometry for projects where continuous current distribution and installation layout are key design inputs.
Ribbon Width · Thickness · Length · Linear Output · Connection · Installation Layout
MMO Rod Anodes
MMO rod anodes can be configured for compact or localized installations requiring a defined diameter, active length, connection and current-output basis.
Diameter · Length · Active Zone · Connection · Output Requirement
MMO Mesh Ribbon Anodes
MMO mesh ribbon provides an open distributed structure that can be reviewed where electrode coverage, installation geometry and current distribution are important project variables.
Mesh Geometry · Width · Active Area · Linear Output · Connection · Installation
MMO Canister Anodes
MMO canister assemblies combine the active anode with project-specific packaging, cable and installation features for defined cathodic-protection groundbed configurations.
Anode Element · Canister Geometry · Cable · Backfill / Installation Basis · Required Output
MMO Linear Anode Systems
Linear MMO systems are reviewed for distributed cathodic-protection projects where required current per unit length, installation route and total protected area must be considered together.
Linear Output · Total Length · Environment · Installation Geometry · Cable / Connection
Engineering Note
Form Does Not Define Performance by Itself
Wire, ribbon, tubular or canister geometry should be selected together with coating family, environment, effective active area, current output, installation method and connection design.
MMO Anodes by Form & Geometry
MMO anode geometry affects current distribution, surface area, electrolyte flow, installation method, and service performance. Hele Titanium can manufacture MMO coated titanium anodes in standard and custom forms.
MMO Mesh Anodes
High surface area, uniform current distribution, electrolysis cells, water treatment, and electrochemical reactors.
Mesh opening, thickness, coating area, frame, tab, and connection.
MMO Disc Anodes
Marine ICCP systems, ballast tanks, hull protection, compact CP assemblies, and localized current distribution.
Disc diameter, coating area, mounting stem, cable connection, current output, sealing method, and installation environment.
MMO Tubular Anodes
Cathodic protection, offshore systems, seawater applications, deepwell systems, and long-life current output.
Tube size, length, coating area, cable connection, end cap, and canister design.
MMO Ribbon Anodes
Reinforced concrete cathodic protection, tank bottoms, and distributed current applications.
Ribbon width, thickness, coating loading, spacing, and connection design.
MMO Rod Anodes
Compact cells, laboratory systems, electrolysis, and small electrochemical reactors.
Diameter, length, coating area, thread, cable, and mounting design.
MMO Wire / Coil Anodes
Small cells, compact electrolyzers, electrochemical testing, and custom assemblies.
Wire diameter, coil size, coating type, shape, and electrical connection.
Canistered MMO Anodes
Deepwell groundbeds, cathodic protection systems, and long-term underground installations.
Canister size, backfill, cable, current output, installation depth, and design life.
MMO Linear Anode
Distributed current output for pipelines, tank bottoms, reinforced concrete, buried structures, and long-distance ICCP systems.
Anode length, current output, cable connection, coke breeze backfill, installation depth, coating loading, and service life requirements.
What to Confirm Before an MMO Anode Is Specified
Regardless of anode form, every MMO project should define the coating direction, electrical duty, effective active area or length, service environment, connection, design-life basis and inspection requirements before quotation and production.
Coating Direction Must Match the Duty
The coating family should be confirmed from the target anodic reaction or cathodic-protection environment rather than selected from the term “MMO” alone. Ru-Ir, Ir-based / Ir-Ta and project-specific MMO systems serve different electrochemical duties.
Electrical Ratings Need a Defined Basis
Current density, total current and linear or per-anode output should be linked to the effective active geometry, coating requirement, service environment and operating conditions. A published current value should not be treated as universal across different MMO forms or applications.
Design Life Is Condition-Dependent
Design-life requirements should be reviewed together with coating requirement, electrical loading, environment, temperature, duty cycle and the calculation or validation method used for the project.
Define the Inspection Basis Before Production
Material traceability, coating-related records, dimensional inspection, electrical-interface checks and project-specific testing should follow the agreed drawing, purchase specification and inspection scope.
Numeric Limits Are Project-Defined
Current density, current output, coating loading and design life should not be treated as universal MMO values. They must be reviewed against the coating family, active geometry, environment, temperature, duty and project methodology.
Provide the coating direction if known, electrical duty, active geometry, environment, connection, design-life requirement and inspection scope for engineering review.
MMO Anodes by Electrolyte & Installation Environment
The appropriate MMO anode depends on both the electrochemical duty and the service environment. For electrolysis, start with the target anodic reaction; for cathodic protection, start with the protected structure, required current and installation conditions.
Electrochlorination & Chloride Electrolysis
Ru-Ir MMO anodes can be reviewed for electrochlorination, hypochlorite generation and chloride-electrolysis systems where chlorine evolution is the intended anodic reaction.
Review
Chloride Concentration · pH · Temperature · Current Density · Flow · Required Output
Starting Direction
Ru-Ir MMO
Oxygen-Evolution Electrolysis
Ir-based / Ir-Ta MMO coatings can be reviewed for oxygen-evolution duties where electrolyte chemistry, acidity, current density, temperature and contaminants are clearly defined.
Review
Electrolyte · pH · Acid / Sulfate Conditions · Current Density · Temperature · Contaminants
Starting Direction
IrO₂ / Ir-Ta MMO
Pipelines & Buried Structures
MMO anodes can be engineered for impressed-current cathodic-protection systems protecting buried pipelines and structures where soil conditions, current demand, installation geometry and electrical connection are defined.
Review
Soil Conditions · Resistivity · Current Requirement · Installation Spacing · Cable / Connection
Tank Bottoms & Groundbed Systems
Ribbon, mesh ribbon, linear, tubular or canister MMO systems can be reviewed according to tank geometry, groundbed configuration, required current distribution and project design basis.
Review
Protected Area · Current Requirement · Installation Layout · Soil / Backfill Conditions · Design Life
Marine & Offshore Structures
MMO anodes can be reviewed for marine and offshore cathodic-protection systems where seawater conditions, required current output, mounting arrangement and electrical interfaces are defined.
Review
Seawater Environment · Current Requirement · Mounting · Cable / Connection · Design Life
Concrete & Infrastructure CP
Distributed MMO anode systems can be reviewed for reinforced-concrete and infrastructure cathodic protection where electrode layout, current distribution and installation method are defined by the protection design.
Review
Structure Geometry · Current Distribution · Installation Method · Active Length / Area · Connection
Application Name Alone Is Not Enough
“Cathodic protection,” “electrolysis” or “water treatment” does not by itself define the final MMO coating or anode form. The dominant reaction, service environment, electrical duty and installation geometry should be confirmed first.
Separate Electrolysis Selection from CP Design
Electrolysis projects are primarily routed by the intended anodic reaction and electrolyte chemistry. Cathodic-protection projects require additional review of the protected structure, environment, current demand, installation layout and design-life basis.
Custom MMO Anodes Engineered from Your Project Data
HELE develops custom MMO titanium anodes from electrochemical process data, cathodic-protection design inputs, drawings or existing-anode information, with coating direction, active geometry, electrical connection and inspection scope defined for the project.
Process or Cathodic-Protection Design Basis
For electrolysis projects, start with the target anodic reaction and electrolyte. For cathodic protection, start with the protected structure, service environment and required current output.
Coating & Active Geometry
The MMO coating direction, effective active area or active length and electrical duty are reviewed together before the final anode configuration is confirmed.
Anode Form & Installation Geometry
Wire, disc, tubular, ribbon, rod, mesh ribbon, canister or linear configurations are reviewed against the equipment or installation layout, current-distribution requirement and available mounting space.
Electrical Connection & Drawing Review
Cable, conductor, weld, sealing and mounting interfaces are reviewed together with customer drawings or existing-anode data before the manufacturing specification is released.
Replacing an Existing MMO Anode?
Send the existing drawing or clear photos together with dimensions, active area or length, cable and connection details, operating environment, current requirement and available service history. The replacement specification should be reviewed before the existing design is copied directly.
Coating, Form & Electrical Duty Should Be Reviewed Together
The same physical anode form can require a different coating direction, active geometry, current-output basis or connection design when the reaction, environment or installation conditions change.
Workflow
Start an MMO Engineering Review
MMO Anode Manufacturing, Inspection & Verification
Material traceability, coating-process records, dimensional inspection, electrical-interface checks and project-specific verification are managed against the confirmed MMO anode specification and agreed inspection scope.
Titanium Substrate & Traceability
Titanium material identification and available heat or lot records are reviewed against the confirmed substrate specification before coating and fabrication.
Review: Material Grade · Heat / Lot · Surface Condition · Product Identification
MMO Coating & Batch Control
The MMO coating process is controlled according to the confirmed coating family, active area or length, project requirement and applicable production records.
Review: Coating Family · Active Zone · Project Requirement · Batch Identification
Geometry, Connection & Assembly
Finished dimensions, active coating boundaries, cable or conductor interfaces, welds, seals and mounting features are inspected against the approved drawing.
Review: Dimensions · Active Area / Length · Cable · Weld · Seal · Mounting
Project-Specific Verification
XRF, electrochemical measurements, accelerated testing or other verification methods can be included where technically applicable and specified.
Review: Method · Sample · Measurement Location · Acceptance Criteria
XRF Verification
XRF can support coating-composition checks when an appropriate calibrated method is used. It does not by itself verify adhesion, full coating uniformity, electrochemical performance or service life.
Accelerated Testing
ALT results should state the test conditions and evaluation basis. Accelerated-test data should not be treated as a direct field-life guarantee.
Inspection & Project Records
Documentation can be provided according to the agreed inspection scope. Availability depends on the agreed PO / inspection requirements.
- Material Records
- Coating / Batch Records
- Dimensional Inspection
- XRF / Test Reports
- Electrical / Connection Records
- Third-Party Inspection Support
Find the Right MMO Anode Direction
Use the application and service environment as a starting point, then confirm the coating, anode form and electrical requirements with project data.
| Application / Environment | Starting Direction | Typical Form Direction |
|---|---|---|
| Chlorine Evolution | Ru-Ir MMO | Plate · Mesh · Tube · Custom |
| Oxygen Evolution | Ir-based / Ir-Ta MMO | Plate · Mesh · Tube · Custom |
| Buried Pipelines | CP Engineering Review | Wire · Linear · Tubular |
| Tank Bottoms / Groundbeds | CP Engineering Review | Ribbon · Mesh Ribbon · Linear · Canister |
| Marine / Offshore | CP Engineering Review | Tubular · Rod · Wire · Custom |
| Concrete / Infrastructure | CP Engineering Review | Ribbon · Mesh Ribbon · Linear |
Note: This matrix is a starting point only. Final selection depends on the reaction or environment, current requirement, geometry, connection and design-life basis.
MMO Titanium Anode FAQs
What is an MMO titanium anode?
How do I choose between Ru-Ir and Ir-Ta MMO coatings?
Which MMO anode form should I choose?
Can MMO anodes be used for cathodic protection?
How should MMO current density or output be specified?
What determines MMO anode design life?
What information do you need for a quotation?
Inside Our MMO Anode Manufacturing & Quality System
See how we prepare titanium substrates, apply MMO coatings, verify coated anodes, and document every project as a direct titanium anode manufacturer.
Get Your Custom MMO Anode Solution
Tell us your application, electrolyte chemistry, operating temperature, pH, target reaction, current density, anode form, quantity, and drawing requirements. Our engineering team will recommend the most suitable MMO titanium anode solution for your process.
- Ru-Ir & Ir-Ta MMO Coating Review
- Custom Mesh, Plate, Tube, Rod & Ribbon Anodes
- XRF, ALT, MTC & Traceability Support
- Engineering Review & Export Documentation