Ru-Ir Coated Titanium Anode Assembly

Product Overview

For engineers who work with sodium hypochlorite generators or saltwater chlorinators, it is always hard to find the right balance between anode life and energy efficiency. Our Ru-Ir Coated Titanium Anode Assembly solves this problem directly by using a “2-Anode-3-Cathode” structure that is precision-welded and a nano-scale coating that keeps the chlorine evolution potential low (<1.13V) over long operational cycles.

This Mixed Metal Oxide (MMO) electrode is made of ASTM B265 Grade 1 Titanium and is made to work in places with chloride ions, like brine or salt water. Our DSA (Dimensionally Stable Anode) technology keeps the electrode size the same during electrolysis, unlike regular graphite anodes. This helps keep the cell voltage steady and the product pure.

Why Choose Our Titanium Anode Assembly?

• High Chlorine Evolution Efficiency: Advanced Ru-Ir oxide formula minimizes overpotential, reducing energy consumption by up to 15%.
• Precision Assembly: CNC-machined and TIG-welded assembly with strict tolerance control (Gap tolerance ±0.5mm) to prevent short circuits and ensure uniform current distribution.
• Extended Service Life: Tested using Accelerated Life Tests (ALT) according to NACE TM0108 standards, providing a lifespan of 3-5 years, depending on the electrolyte and current density
• Circular Economy: We support Titanium Anode Recoating Service. When the coating is consumed, the titanium substrate can be recycled and recoated, saving up to 40% of replacement costs.

Key Technical Specifications

We provide both standard dimensions and custom fabrication services based on your technical drawings.

Note: Custom dimensions, shapes (Mesh/Plate/Tube), and reverse polarity designs are available upon request.

Manufacturing & Quality Assurance

We control the entire process from raw titanium sponge to the final coated assembly to ensure batch consistency and coating adhesion.

1. Substrate Pretreatment (The Foundation)

The adhesion of the MMO coating relies heavily on the substrate surface. We utilize a rigorous Sandblasting and Acid Etching process to create a rough, active surface structure on the Grade 1 Titanium. This increases the physical bonding area by 500% compared to smooth surfaces, preventing coating peeling (delamination).

2. Thermal Decomposition Coating (The Core)

We apply the precious metal solution (Ru/Ir) using a Brush Coating technique, followed by high-temperature sintering in a dedicated furnace. This process is repeated 12 to 20 times to achieve the required thickness and form a dense, nano-crystalline oxide layer.

3. Rigorous Testing

Before shipment, every batch undergoes strict inspection:

• Visual Inspection: Checking for uniform black color and no physical defects.
• XRF Thickness Test: Using X-Ray Fluorescence to verify Ru/Ir loading.
• Tape Test: Compliant with ASTM D3359 to ensure coating adhesion.
• Welding Check: All connection points are inspected for penetration and lack of oxidation colors.

Applications & Integration

This Ru-Ir coated titanium anode assembly is specifically engineered for Chlorine Evolution Reactions.

• Sodium Hypochlorite Generators: On-site generation of disinfectant for municipal water treatment and cooling tower disinfection.
• Swimming Pool Chlorinators: Replacement cells for residential and commercial salt water chlorination systems.
• Wastewater Treatment: Degradation of organic pollutants via electro-oxidation.
• Electro-winning: Metal recovery in chloride systems.

Operational Recommendations:

• Current Density: We recommend operating below 2000 A/m². While the Grade 1 titanium substrate can handle higher loads, maintaining this range significantly extends the MMO coating’s active life.
• Cleaning: Regular acid washing (e.g., dilute citric acid) is recommended to remove calcium/magnesium scale from the cathode surface. Avoid physical scratching of the anode coating.

Sustainable Service: Recoating (Refurbishment)

Don’t scrap your deactivated anodes—maximize their value.

Since the Grade 1 Titanium substrate often outlasts the active coating by decades, purchasing new assemblies every time is unnecessary. Our Recoating Service involves stripping the old coating via precision sandblasting and applying a fresh Ru-Ir layer. This process effectively restores catalytic performance to near-original levels at roughly 60% of the cost of a new replacement.

• Step 1: Assessment of substrate integrity.
• Step 2: Sandblasting to remove old coating.
• Step 3: Acid etching and fresh MMO coating application.
• Step 4: Final testing and delivery.

Frequently Asked Questions (FAQ)

Q: What is the difference between Ru-Ir and Ir-Ta coated anodes?

A: Ru-Ir (Ruthenium-Iridium) is optimized for Chlorine Evolution (salt water, brine). Ir-Ta (Iridium-Tantalum) is better suited for Oxygen Evolution (sulfuric acid, plating). Choosing the wrong coating significantly reduces service life.

Q: Can you customize the assembly based on my drawing?

A: Yes. We have in-house CNC machining and welding capabilities. We can fabricate complex assemblies like the “2-Anode-3-Cathode” structure shown, or any other plate/mesh configuration.

Q: Do you provide MTC (Material Test Certificates)?

A: Absolutely. Every shipment includes an MTC for the titanium substrate (verifying Grade 1 purity) and a coating inspection report.

Ready to Optimize Your Electrolysis Process?

Whether you need a custom-designed 2-Anode-3-Cathode assembly for a new project or want to recoat your existing titanium electrodes, our engineering team is here to help.