Ru-Ir Coated Titanium Anode (MMO)

Product Overview

Engineers in the electrochemical industry often face the challenge of anode passivation and high energy consumption. Our Ruthenium-Iridium Coated Titanium Anode (commonly referred to as MMO or DSA anode) is engineered to solve these issues specifically for Chlorine Evolution Reactions (CER).

Unlike standard commercial electrodes, our anodes are manufactured using a rigorous thermal decomposition process. We sinter multiple layers of nano-scale Ruthenium-Iridium oxide onto an ASTM B265 Grade 1 pure titanium substrate. This creates a dimensionally stable anode with superior conductivity and corrosion resistance, optimized for brine, seawater, and chloride-containing systems.

Whether you are designing sodium hypochlorite generators, saltwater chlorinators, or cathodic protection systems, this anode delivers a low chlorine evolution overpotential (<1.13V vs SCE), which translates directly to reduced power consumption and lower operational costs.

Why Engineers Choose Our MMO Anodes:

• Validated Longevity: We don’t just promise long life; we prove it. Our anodes achieve >3000 hours in accelerated life tests (per NACE TM0108: 1mol/L H2SO4, 20,000 A/m²), ensuring minimal downtime for your facility.
• Nano-Scale Adhesion: Our proprietary coating process creates a dense, nano-grain oxide structure (10-40nm) that maximizes catalytic surface area and prevents the common issue of coating detachment.
• Precision Fabrication: With in-house laser cutting, we ensure tight tolerances (±0.1mm) for custom tabs, mounting holes, and complex geometries, ensuring a perfect fit for your electrolyzer cells.
• Sustainable Cost Reduction: Don’t scrap your used anodes. We offer a professional Anode Recoating Service that refurbishes your existing titanium substrates, saving you up to 70% compared to purchasing new units.

Key Technical Specifications

The following parameters represent our industrial standard. We strictly adhere to ASTM and NACE methods to ensure data accuracy.

Advanced Coating Technology & Quality Control

The reliability of a DSA anode lies in its microscopic structure. We employ a comprehensive quality control system to prevent premature failure.

• Nano-Grain Structure: Unlike coarse-grained coatings found in budget options, our refined nano-structure increases the active catalytic sites. This improves electrolysis efficiency and significantly enhances the physical bonding between the coating and the substrate.
• 18-22 Coating Cycles: We apply the precursor solution in 18 to 22 separate layers, with sintering after each layer. This builds a dense, uniform coating that resists erosion far better than standard 10-cycle processes.
• Rigorous Testing:
  • Adhesion: Tape test per ASTM D3359 to ensure the coating does not peel.
  • Thickness Verification: Every batch is tested using a handheld XRF spectrometer to guarantee the coating thickness meets your specifications (e.g., min 6μm).
  • Visual Inspection: 100% check to ensure uniform “mud-cracking” morphology without deep defects or contamination.

Typical Applications

• Sodium Hypochlorite Generators: Widely used in power plants for cooling water antifouling and municipal water disinfection. Our low-overpotential coating minimizes heat generation and maximizes chlorine yield.
• Saltwater Chlorinators (Pool & Spa): Ideal for electrolytic disinfection cells. Our anodes are compatible with Reverse Polarity (Self-Cleaning) systems, offering excellent resistance to scale buildup.
• Wastewater Treatment (Electrochlorination): Used for COD degradation and ammonia nitrogen removal in industrial effluent treatment plants.
• Cathodic Protection (ICCP): MMO coated titanium strips, tubes, or mesh used as impressed current anodes for protecting offshore platforms, rebar in concrete, and underground pipelines.

Anode Recoating Service (Save 70% Cost)

Titanium is a valuable metal that does not degrade easily. When your anode fails, it is usually just the oxide coating that is depleted—the titanium substrate is often still intact. Don’t scrap it—Recoat it!

We provide a specialized Titanium Anode Recoating Service for used anodes (even those from other manufacturers):

1. Assessment: We inspect the used anode to ensure the titanium substrate is structurally sound.
2. Surface Treatment: Sandblasting and acid etching remove the old coating and residual scale, creating a fresh, chemically active surface.
3. Recoating: We apply our high-performance Ru-Ir oxide coating using the same standard as our new products.
4. Result: You restore system performance at a fraction of the cost of buying new anodes.

Operation & Maintenance Guide

Pro Tips for Extending Anode Life:

• Watch the Fluoride: Ensure Fluoride ion (F⁻) content in the electrolyte is < 10ppm. Fluoride attacks the titanium substrate rapidly, causing the coating to peel off regardless of quality.
• Current Density Control: Operating above the recommended 2000 A/m² will exponentially shorten the coating life.
• Regular Cleaning: If operating in hard water, periodically clean calcium/magnesium scale using mild acid (e.g., 5% HCl). Avoid scratching the black coating surface with metal tools, as scratches can lead to substrate corrosion.

Frequently Asked Questions (FAQ)

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

A: Ru-Ir (Ruthenium-Iridium) is specifically designed for Chlorine Evolution environments (saltwater, brine, seawater). Ir-Ta (Iridium-Tantalum) is designed for Oxygen Evolution environments (sulfuric acid, plating). Using Ru-Ir in an oxygen evolution application will lead to rapid failure.

Q: Can you customize the anode shape based on my drawing?

A: Yes. We have in-house laser cutting and welding capabilities. Please send your CAD drawings (DWG/DXF/PDF), and we can fabricate custom plates, meshes, or tube assemblies with precise tab locations to fit your electrolyzer.

Q: Do you provide a Material Test Certificate (MTC)?

A: Yes, every shipment is accompanied by an MTC that lists the substrate grade, coating thickness test results, and batch traceability information.

Q: What is the MOQ (Minimum Order Quantity)?

A: We support 1 piece for sample testing or custom prototypes. We understand that maintenance projects often require specific quantities, not just bulk orders.