Ruthenium iridium titanium anodes are currently one of the mainstream functional electrode materials in industrial electrolysis applications. The product uses pure titanium/titanium alloy as the substrate and forms a sintered layer of ruthenium-iridium mixed precious metal oxide coating on the titanium surface through a high-temperature thermal oxidation process. It is a core category of Dimensionally Stable Anodes (DSA). Its key advantages include the high strength, corrosion resistance, and excellent machinability of the titanium substrate, combined with the outstanding electrocatalytic activity, low overpotential, and strong resistance to electrolytic corrosion of the ruthenium-iridium coating.
1.Specification
General Shapes: Plate, Rod, Mesh, Tube or customization
Coating: The classical formula of Ru-Ir or customization
Electrochemical reaction: Chlorine evolution reaction
Internal Code: NAVI-1-003
Brand: NAVI Titanium®
Basic Material: Pure Titanium Gr1
Advanced fields of NAVI: Wastewater Treatment, Chlor-Alkali Industry, Hydrometallurgy etc.
2.Purchasing guide
(1)Process
NAVI Titanium(since 2008) can process according to your design drawings
(2)Free sample
NAVI Titanium supply free sample for general specifications
(3)Technology support
Professional one-for-one service, design free, welcome to contact us
Electrolysis Mechanism of Ruthenium-Iridium Titanium Anodes
The Ru-Ir coated titanium anode works through the synergistic effects of the titanium substrate, catalytic coating, and electrochemical reactions, enabling efficient chlorine generation and stable performance in chloride-containing electrolysis systems.
Titanium Substrate Support
Provides stable current conduction, protects the titanium base from electrolyte corrosion, and maintains long-term electrode stability.
Ru-Ir Coating Catalysis
Provides low chlorine evolution overpotential, accelerates chloride ion activation, reduces energy consumption, and improves electrolysis efficiency.
Electrochemical Reaction
Produces chlorine gas, which forms hypochlorous acid and hypochlorites for disinfection, sterilization, and pollutant oxidation.
Low-Chloride Conditions
Enables mild oxygen evolution reaction (OER), providing better adaptability in complex electrolysis environments.
Comparison of Ru-Ir, Ir-Ta, and Pt Coatings for Titanium Anodes
Common industrial anodes include four major types: ruthenium iridium titanium anodes, iridium-tantalum coated titanium anodes, platinum coated titanium anodes, and graphite anodes. These products differ significantly in applicable operating conditions, service life, and cost. The following table provides a clear comparison of key parameters to help with precise selection.
| Anode Type | Reaction | Key Advantages |
| Ru-Ir Coated Titanium Anode | CER | High chlorine efficiency, low energy consumption, cost-effective |
| Ir-Ta Coated Titanium Anode | OER | Strong acid resistance, high oxidation resistance, long service life |
| Platinum Coated Titanium Anode | OER/CER | Excellent catalytic performance and corrosion resistance |
Structure Selection
Different equipment structures require different anode designs. Common types of ruthenium iridium titanium anodes include mesh, plate, tube, basket, or customized.
Coating Thickness Selection
The service life of Ru-Ir coated titanium anodes is mainly determined by the combination of titanium substrate strength and precious metal coating loading.
Operating Condition
Light-duty operation
Standard industrial applications
High-salt and high-current applications
Recommended Substrate
Titanium mesh around 1.0 mm
Titanium mesh 1.0–1.5 mm/plate 2–3 mm
Thickened titanium plate/tube
Coating Loading
8–12 g/㎡
12–18 g/㎡
18–25 g/㎡
Expected Service Life
5–8 years
Over 8 years
Applications & Primary Benefits
Ru-Ir coated titanium anodes are widely used in chloride-based electrochemical processes. According to different operating environments and application requirements, suitable anode structures and coating solutions can be selected to achieve higher electrolysis efficiency, longer service life, and lower operating costs.
| Application Field | Primary Application | Key Benefits |
|---|---|---|
| Water Treatment & Disinfection | Used for swimming pool disinfection, municipal water treatment, wastewater sterilization, and circulating water systems to generate active chlorine through electrolysis. | High chlorine evolution efficiency, low energy consumption, stable operation, and reduced chemical usage. |
| Sodium Hypochlorite Generators | Applied in saltwater electrolysis systems for on-site production of sodium hypochlorite disinfectant in industrial and commercial applications. | Excellent chlorine generation performance, continuous operation capability, and long electrode service life. |
| Seawater Treatment & Desalination | Used in seawater electrolysis, marine corrosion protection, and seawater disinfection systems under high chloride concentration environments. | Superior salt corrosion resistance, stable catalytic activity, and reliable performance in harsh conditions. |
| Industrial Circulating Water Treatment | Applied in power plants, petrochemical facilities, and industrial cooling systems for algae control, biofouling prevention, and water quality maintenance. | Effective microorganism control, reduced chemical additives, and improved system efficiency. |
| Chlor-Alkali & Industrial Electrolysis | Used in chloride electrolysis processes requiring high current density and long-term continuous operation. | High current load capacity, excellent electrochemical stability, and extended operating lifetime. |
| Aquaculture & Marine Systems | Used for water disinfection and microbial control in aquaculture tanks and marine equipment. | Safe sterilization, stable chlorine production, and easy integration into automatic systems. |
How We Customize Ru-Ir Coated Titanium Anodes for Your Application
Every electrochemical application has its own operating conditions. Instead of providing standard solutions, we design and manufacture titanium anodes based on your specific process requirements, including coating formulation, service life, electrode structure, and installation method.
Coating Composition (Ru:Ir Ratio)
The Ru-Ir ratio is customized based on electrolyte composition, chloride concentration, pH, and reaction requirements to ensure stable catalytic performance.
PGM Loading & Service Life
Coating loading and thickness are optimized according to operating conditions, balancing electrode lifetime and cost efficiency.
Electrode Geometry & Active Area
Anode dimensions are designed for current density, reaction area, and installation space to achieve uniform current distribution and efficient operation.
Custom Terminals & Connections
We provide customized studs, flanges, and busbars to ensure reliable connections, lower energy loss, and easy system integration.
Quality Inspection Standards
Surface Inspection
The coating surface should be uniform, dense, and well bonded, with no visible defects such as cracks, peeling, or pinholes. The titanium substrate should be free from deformation and surface damage to ensure stable electrochemical performance and service life.
Material Inspection
The substrate should use TA1/TA2 pure titanium with reliable corrosion resistance and mechanical strength. Material certificates should be provided, and the Ru-Ir coating composition should meet the specified technical requirements.
Performance Testing
The anode should demonstrate stable electrolysis performance, consistent current output, and low voltage fluctuation during operation. Electrochemical test data should be available to verify product quality and performance.
Service Life and Maintenance Recommendations
The service life of ruthenium iridium titanium anode depends on operating conditions, including current density, chloride concentration, electrolyte temperature, pH value, and coating loading. Under suitable conditions, MMO titanium anodes can provide stable catalytic performance for years with proper operation and maintenance.
Current Density Control: Excessive current density accelerates Ru-Ir coating consumption and may shorten electrode lifetime. Operating within the recommended range helps maintain catalytic activity.
Chloride Concentration Management: Ru-Ir coatings are commonly used in chloride-containing electrolytes. However, excessive chloride concentration or harsh oxidation conditions can increase coating wear and affect long-term stability.
Electrolyte Temperature & pH: High temperature, extreme pH conditions, and impurities can accelerate coating degradation. Maintaining stable electrolyte conditions helps extend service life.
Coating Surface Protection: The catalytic coating is the active layer of the anode. Avoid mechanical impact, scratching, or improper cleaning methods that may damage the coating.
Purchasing Guide
To provide an accurate quotation and recommend the most suitable titanium anode solution, please prepare the following technical information before sending your inquiry. Learn more purchasing guide here to understand how NAVI Titanium delivers application-specific solutions.
Application Details
- Electrochemical process and application
- pH range
- Operating temperature
- Required current density
- Operating voltage or cell voltage
- Expected service life
Anode Specifications
- Coating thickness
- Active coating area
- Overall dimensions and geometry
- Connection type and installation method
- Technical drawings, samples, or reference photos
Quality & Delivery Requirements
- Required testing standards or inspection requirements
- Documentation requirements (test reports, material certificates, etc.)
- Required quantity
- Target delivery time
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