MMO Titanium Anode FAQ – Technical Support

Sep 21, 2026

MMO tubular anode

Q1: What is an MMO titanium anode and how does it work?

A: An MMO (Mixed Metal Oxide) titanium anode is a dimensionally stable anode (DSA) made from a high-purity titanium substrate (Grade 1 / TA1) coated with precious metal oxide catalysts such as RuO₂-IrO₂ (Ruthenium-Iridium) or IrO₂-Ta₂O₅ (Iridium-Tantalum).

At DINOER, we produce a full range of coated titanium anodes for six major sectors: cathodic protection, water treatment, metallurgy & surface treatment, chemical & organic synthesis, new energy, and diversified industrial applications.

The titanium base provides mechanical strength and corrosion resistance, while the micron-level oxide coating delivers low overpotential and high electrocatalytic activity. During electrolysis, the anode itself does not dissolve, which keeps the cell voltage stable and eliminates contamination of the electrolyte or final product.

MMO titanium mesh belt anode

Q2: How do I choose the right coating system for my application?

A: 

Coating selection depends on your electrolyte chemistry and the primary anode reaction (chlorine evolution vs. oxygen evolution). Based on our product range, the main systems are：

Quick guide:

• If your process generates chlorine (brine, seawater, chloride bath) → choose Ru-Ir.

• If your process generates oxygen in acidic or neutral media → choose Ir-Ta.

• For high-purity plating or fluoride-free critical processes → choose Pt-coated.

Using the wrong coating is the #1 cause of premature failure. Send us your electrolyte composition and we will recommend the optimal coating load (12–22 g/m²) and formulation.

MMO titanium mesh belt anode

Q3: What products do you offer for cathodic protection (CP)?

A: We supply a complete CP anode portfolio under our DINOER Sunrise Series, engineered for buried pipelines, storage tanks, marine structures, and reinforced concrete:

• Flexible MMO Anode (ELTA Series) – Conductive polymer flexible anode with MMO ribbon core; small diameter, high flexibility, ideal for complex pipeline networks and tank bottom grids. Design life up to 20–50 years.

• MMO Tubular Anode – For deep-well anode beds (depth ≥15 m) in high-resistivity soil; integrated with coke backfill and vent pipe.

• MMO Anode Ribbon / Titanium Conductor Bar – TA1 base with Ir-Ta or Ru-Ir coating; bend radius ≤40 mm; used in grid configurations for tank interiors, pipe internals, and water tanks.

• MMO Wire Anode – GR1 titanium wire with Ir-Ta coating; diameter customizable; output current precisely matched to small-to-medium CP beds.

• MMO Mesh Anode – One-piece punched titanium mesh, no welds; low resistance, uniform current distribution; perfect for tank bottom cathodic protection and concrete structures.

All CP anodes feature copper-titanium transition joints with IP68 waterproofing and comply with GB/T 33637-2025 and SY/T 0088-2016.

Ru-Ir mixed oxide coated anode

Q4: Can your titanium anodes be used for water treatment and disinfection?

A: Yes. Water treatment is one of our core application fields. Our MMO titanium anodes enable four key processes:

1. Electrolytic Disinfection – On-site generation of sodium hypochlorite or slightly acidic electrolyzed water using Ru-Ir coated titanium electrodes. No hazardous chemical storage required. Typical application: our *DNE-WI-1000B sodium hypochlorite generator (effective chlorine output: 1000 g/h, DC power consumption: 4.5 kW, salt consumption: 3.2 kg/h), widely used in municipal sewage, drinking water, hospitals, and food processing.

2. Industrial Wastewater Advanced Oxidation – Ir-Ta coated titanium anodes break down refractory organics (phenols, antibiotics, dyes) in chemical, pharmaceutical, and printing wastewater; reduces COD, ammonia nitrogen, and color while improving biodegradability.

3. Heavy Metal Removal – Electrochemical reduction and electro-flocculation of Cr⁶⁺, Ni²⁺, Cu²⁺, Pb²⁺ from electroplating and metallurgy wastewater.

4. Seawater Desalination Pretreatment – Kills microorganisms and prevents biofouling of RO membranes.

   
   

Sodium Hypochlorinite Electrolyzer

Q5: Do you supply anodes for new energy applications like hydrogen production?

A: Absolutely. We are actively supporting the green hydrogen and new energy sector with:

• PEM Electrolyzer Anodes – Ir-Ta coated titanium anodes engineered for proton exchange membrane water electrolysis. Extremely low oxygen evolution overpotential, stable in high-potential acidic environments, enabling lower cell voltage and higher energy conversion efficiency for large-scale green hydrogen plants.

• Functional Water Electrolysis – Small-pore MMO titanium anodes for hydrogen-rich water dispensers and acidic ionized water generators (no heavy metal leaching, stable output purity).

• New Energy Facility Water Treatment – Electro-oxidation electrodes for PV and hydrogen park circulating water, process wastewater, and RO pretreatment.

Beyond hydrogen, we also supply electrolytic copper foil anodes (Ru-Ir coated, gradient formulation for 7×24 continuous production) and lithium aluminum foil formation anodes (Ir-Ta / Ru-Ir titanium mesh for uniform oxidation film, low tank voltage).

Need a Custom Quote?

To specify the right MMO titanium anode, please share:

1. Application (CP / electrolysis / plating / wastewater / hydrogen)

2. Electrolyte (NaCl, H₂SO₄, plating bath, soil resistivity, etc.)

3. Target reaction (chlorine / oxygen evolution)

4. Current density (A/m² or A/dm²)

5. Temperature & pH

6. Anode shape & dimensions (plate, mesh, tube, wire, ribbon, custom)

7. Design life required

8. Quantity & destination port

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