MMO titanium anode (metal oxide anodes) are composite corrosion protection materials based on a titanium metal substrate. They achieve highly efficient electrochemical protection by forming a rare metal oxide coating on the surface of industrial-grade pure titanium. The substrate utilizes high-purity Grade 1/Grade 2 titanium plates (0.5-3mm thick). After sandblasting for surface roughening, an iridium-based (IrO₂-Ta₂O₅) or ruthenium-based (RuO₂-TiO₂) oxide coating is applied in three layers via the sol-gel method, ultimately forming an active layer 20-50μm thick. This structure endows MMO titanium anode with three core characteristics: high-efficiency energy conversion (anode polarization voltage controlled within 200 mV, with electrical energy conversion efficiency reaching 95–98%), long-term protective mechanisms (theoretical service life extending to 20–25 years), and intelligent morphological adaptability (operating temperature range expanded to −40°C to 120°C). When selecting MMO titanium anode, prioritize coating type compatibility with the operating medium—iridium-based coatings suit oxygen evolution environments (e.g., sulfuric acid media), while ruthenium-based coatings suit chlorine evolution environments (e.g., hydrochloric acid or chloride solutions). The 2025 technological iteration focuses on intelligent sensing capabilities, with some high-end MMO titanium anodes integrating micro-sensors to monitor real-time temperature changes (accuracy ±0.5°C), coating wear (resolution 0.1μm), and potential fluctuations (sampling rate 100Hz).
The global MMO titanium anode supply chain is led by manufacturers specializing in electrochemical technology and coating processes. Aoke Cathodic Protection (China) offers a full range of MMO titanium anode. Its deep well anode tubes (Φ50mm×6000mm), paired with coke filler chambers, extend the protection radius to 150 meters in desert pipeline applications. E-Lade Technology (Xi'an, China), with over 30 years of R&D experience, supplies customized MMO anode to over 60 countries worldwide. Its patented coating technology significantly enhances electrode durability. Baoji Zhiming Special Metals (China) specializes in ruthenium-iridium coated titanium electrode plates for electrolytic disinfection and water treatment applications. Henan Huayun Innovation Technology (China) supplies tubular and strip MMO titanium anodes, specializing in cathodic protection projects. De Nora (Italy) DSA anode, a global leader in electrochemical solutions, offers MMO titanium anode for chlor-alkali industries, electrolytic hydrogen production, and marine ballast water treatment. Metallurgical Products Company (USA) manufactures high-current-density MMO titanium anode primarily for cathodic protection of oil and gas pipelines in North America. Permascand (Sweden) focuses on environmental applications, holding significant market share for its MMO titanium anode in industrial wastewater treatment. Magneto Special Anodes (Netherlands) provides customized titanium MMO anode solutions for electroplating and electrometallurgy. Indian Platinum Private Limited (India) is a major South Asian supplier offering outstanding cost-performance ratios. Coral Products Limited (UK) specializes in MMO titanium anode for marine engineering, with its deep-sea enhanced products rated for 10MPa pressure and suitable for depths up to 3000 meters.
Below is a comparison of key parameters and prices for five mainstream titanium MMO anode models in the 2025 international market, sourced from industry procurement catalogs and technical white papers:
| Product Model | Application Scenario | Coating Type | Current Density (A/m²) | Operating Temperature (°C) | Service Life (Years) | Reference Price (USD) |
|---|---|---|---|---|---|---|
| ANO-IC-100 | Electroplating, Electrolytic Coloring | Iridium-Tantalum Oxide | 12000 | ≤60 | 5-7 | 450-600 |
| ANO-RC-200 | Seawater electrolysis, disinfection chlorine generation | Ruthenium-iridium oxide | 2000 | ≤60 | 8-10 | 520-700 |
| ANO-DP-300 | Deep-sea cathodic protection, offshore platforms | Five-layer gradient iridium coating | 5000 | -40~120 | 35 | 2200-3500 |
| ANO-FLEX-150 | Flexible cathodic protection for pipelines and storage tanks | Mixed oxides | 1500 | -30~80 | 40 | 85-120/m |
| ANO-TUBE-50 | Chlor-alkali industry, high-concentration hydrochloric acid electrolysis | Platinum coating | 5000 | ≤80 | 10-12 | 800-1200 |
The deep-sea grade ANO-DP-300 model carries a higher price point, but its 35-year design life and 10MPa pressure rating deliver lifecycle cost advantages for offshore projects. Flexible anodes ANO-FLEX-150 are priced per meter and require backfill material during installation to optimize current distribution.
The recycling value of discarded MMO titanium anode lies primarily in the titanium substrate and precious metal coating. The titanium substrate (TA1 or TA2 industrial pure titanium) can be re-polished and recoated after removing surface oxide layers via electrolytic stripping or thermal decomposition, theoretically enabling infinite regeneration. Precious metals in the coating (iridium, ruthenium, platinum) require high-temperature smelting or chemical leaching for recovery. Platinum coated titanium anodes offer the highest recycling economics, yielding 1-5 grams of platinum per kilogram of spent electrode. In practice, manufacturer E-Lade Technology offers a trade-in program where customers receive a 15% discount on new orders by returning used MMO titanium anode. The 2025 EU Circular Technology Standard mandates that titanium MMO anode manufacturers must declare precious metal recovery rates. Leading companies have already achieved an iridium recovery rate of 85%. For discarded MMO titanium anodes replaced at engineering sites, it is recommended to prioritize returning them to the original manufacturer for processing to avoid environmental risks and resource waste associated with independent disposal.
Language
