What Is the Role of MMO Titanium Anodes in Chlor-Alkali Electrolysis?
In chlor-alkali electrolysis, titanium anodes serve as the core electrochemical components responsible for chlorine evolution.
During the electrolysis process:
Anode Reaction:2Cl⁻ → Cl₂ + 2e⁻
The MMO coating acts as the active catalytic layer, enabling efficient chlorine evolution while protecting the titanium substrate from corrosion.
A high-performance anode directly affects:
- Cell voltage
- Energy consumption
- Chlorine production efficiency
- Electrode lifetime
- System operating stability
Why Chlor-Alkali Systems Require High-Performance Anodes
Chlor-alkali electrolysis places extremely demanding requirements on anodes. During continuous operation, the electrode is exposed to:
- High chloride concentration
- Strong oxidation environment
- High current density
- Long-term electrochemical stress
Therefore, the anode must achieve:
| Requirement | Engineering Purpose |
| High chlorine evolution activity | Reduce anode overpotential and improve energy efficiency |
| Excellent corrosion resistance | Maintain stable operation in brine environments |
| Uniform coating distribution | Ensure consistent electrochemical performance |
| Strong coating adhesion | Prevent premature coating degradation |
Ehisen optimizes MMO coating systems according to actual operating conditions to achieve reliable electrode performance.
Ru-Ir MMO Coating Technology
Active Electrochemical Layer for Chlorine Evolution
The MMO coating is the functional layer responsible for electrochemical reactions.
Ehisen Ru-Ir MMO coatings are based on mixed metal oxide catalysts, mainly consisting of:
- Ruthenium oxide (RuO₂)
- Iridium oxide (IrO₂)
- Other optimized oxide components
The combination of RuO₂ and IrO₂ provides:
High Chlorine Evolution Activity
Ru-based oxide components provide excellent catalytic activity for chlorine evolution.
Improved Coating Stability
Ir-based oxide components enhance corrosion resistance and support longer operating life.
Optimized Electrochemical Performance
The coating composition can be customized based on:
- Current density
- Electrolyte conditions
- Operating temperature
- Required service life
Titanium Substrate + MMO Coating Structure
Two Functional Components Working Together
A complete MMO titanium anode consists of two essential parts:
1,Titanium Substrate
- The titanium substrate provides:
- Mechanical strength
- Structural stability
- Electrical current transmission support
- Corrosion-resistant foundation
2,MMO Active Coating
- The MMO coating provides:
- Catalytic reaction sites
- Chlorine evolution activity
- Reduced electrochemical resistance
- Protection of the titanium substrate
MMO Coating Selection Guide
Selecting the Right Coating Based on Operating Conditions
Different electrochemical environments require different coating systems
| Application | Recommended Coating | Main Advantage |
| Standard chlor-alkali electrolysis | Ru-Ir MMO | High chlorine evolution activity |
| High current density operation | Optimized Ru-Ir MMO | Improved coating stability |
| Oxygen evolution environments | Ir-Ta MMO | Higher oxygen evolution resistance |
| Special lifetime requirements | Customized MMO | Optimized precious metal loading |
Customized MMO Titanium Anode Solutions
Designed According to Your Electrolysis System
Ehisen provides customized MMO titanium anodes based on:
Electrode Design
Titanium plate
Titanium mesh
Titanium rod
Custom electrode structures
Coating Configuration
Ru-Ir MMO coating
Ir-Ta MMO coating
Customized MMO systems
Operating Conditions
Current density
Electrolyte composition
Temperature
Required service life
Technical Parameters for Customization
To provide a suitable anode solution, please provide:
| Parameter |
|
| Titanium substrate | Gr1 / Gr2 |
| Electrode type | Plate / Mesh / Rod / Custom |
| Dimensions | Length × Width × Thickness |
| Coating system | Ru-Ir MMO / Ir-Ta MMO |
| Coating Side | Single side / Double side |
| Operating current | A |
| Current density |
|
| Electrolyte | Purified brine / Other |
| Operating Temperature | ℃ |
| Expected lifetime | Years |
Factors Affecting MMO Titanium Anode Lifetime
Key Parameters Influencing Electrode Durability
Current Density
Higher current density increases electrochemical stress and requires optimized coating design.
Brine Quality
Impurities in electrolyte may accelerate coating degradation.
Operating Temperature
Higher temperature conditions require improved coating stability.
Coating Loading
Proper precious metal loading helps balance performance and service life.
MMO Titanium Anode Manufacturing Process
Complete Production Capability from Titanium Material to Finished Electrode
Titanium Material Preparation
1
>>
Surface Treatment
2
>>
MMO Coating Application
3
>>
Thermal Treatment
4
>>
Quality Inspection
5
>>
Performance Testing
6
Why Choose Ehisen as Your Chlor-Alkali Anode Supplier?
Customized MMO Titanium Anode Manufacturer
Ehisen provides:
Engineering-Based Customization
Solutions designed according to your operating conditions.
Stable Manufacturing Capability
Controlled coating process and consistent production quality.
Application Support
Technical assistance from electrode selection to final production.
OEM Capability
Customized dimensions, structures and coating requirements available.
Frequently Asked Questions
What MMO coating is suitable for chlor-alkali electrolysis?
Ru-Ir MMO coatings are commonly used for chlor-alkali membrane cell applications due to their excellent chlorine evolution activity and stability in brine environments.
How do you customize titanium anodes for different chlor-alkali systems?
Customization is based on electrode dimensions, current density, electrolyte conditions, operating temperature and lifetime requirements.
What information is required for quotation?
Please provide:
- Electrode dimensions
- Quantity
- Titanium substrate specification
- Coating requirement
- Operating conditions
Why is titanium used for chlor-alkali anodes?
Titanium provides excellent corrosion resistance, mechanical strength and dimensional stability.
Request Your Custom MMO Titanium Anode Solution
Looking for a reliable MMO titanium anode manufacturer for your chlor-alkali equipment?
Ehisen provides customized solutions including:
✓ MMO coating selection
✓ Titanium electrode design
✓ OEM manufacturing
✓ Technical support
Contact Ehisen today to discuss your titanium anode requirements.
Our address
JNo. 369, Gaoya Industrial Park, Weibin District, Baoji City, Shaanxi Province, China 721013
Phone Number
86+18710841426
elowenyu@ehisen-anode.com
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