Iridium oxide electrode

Iridium oxide electrode

In electrochemical processes dominated by oxygen evolution, anode stability is the lifeline of your production. Our Iridium Oxide Electrode at Baoji City ShenAo Metal Materials Co., Ltd. is engineered for extended service life and high reliability under oxygen evolution conditions. Using pure titanium or the more corrosion-resistant niobium as the substrate, it features a dense iridium oxide catalytic coating. Iridium, noted among noble metals for its strong resistance to oxygen evolution corrosion, allows this electrode to maintain a very low wear rate even in strong acids and at high current densities. For operations that demand long-cycle stability and cannot afford frequent shutdowns, this is a product worth evaluating closely.

Technical Specifications

Why Choose Our Titanium Anodes?

• Exceptional Durability in Oxygen Evolution
  Iridium oxide exhibits a very low corrosion rate among noble metal oxides at oxygen evolution potentials. This means in your acidic water electrolysis, electroplating, or metal recovery lines, our electrode lasts significantly longer—typically 3-5 times the service life of ruthenium-based coated anodes. You no longer need to worry about frequent electrode replacements.
• Performance Integrity at High Current Densities
  When you need to push production at high current densities of 3,000–5,000 A/m², ordinary electrode coatings can fail rapidly. Our iridium oxide coating maintains stable oxygen evolution catalytic activity and structural integrity under these punishing conditions, enabling your line to sustain high-load operation.
• Niobium Substrate for Extreme Corrosion Resistance
  When the electrolyte contains fluoride ions or operates in high-temperature strong acid environments, even titanium substrates can suffer pitting corrosion. We offer a niobium substrate option, whose corrosion resistance far exceeds that of titanium, significantly reducing substrate failure risk and ensuring your core assets remain highly stable under extreme conditions.
• Custom Formulations for Precise Matching
  Pure iridium oxide is just the starting point. Our technical team can optimize the coating formulation by incorporating elements like tantalum or tin, tailored to your specific electrolyte composition. This identifies an ideal balance between oxygen evolution activity and long-term stability for your unique process.

Real-World Applications

• Acidic Water Electrolysis for Hydrogen Production: On the anode side of PEM electrolyzers, it withstands a highly acidic environment and vigorous oxygen evolution reaction, serving as a key component in hydrogen production.​​​​​​​
• Electroplating Industry: In processes requiring insoluble anodes such as hard chrome plating, zinc plating, and precious metal plating—especially in baths containing organic additives—it provides a stable operating potential.
• Metal Foil/Steel Strip Electroplating Lines: For electrolytic copper foil production and continuous electrolytic tinplate (ETP) lines, it delivers uniform current distribution and long-term dimensional stability.
• Advanced Oxidation for Wastewater Treatment: In treating industrial wastewater containing phenols, cyanides, or high COD levels, it generates hydroxyl radicals directly on the anode surface, efficiently degrading recalcitrant organic compounds.​​​​​​​
• Non-Ferrous Metal Electrowinning: In processes for electrolytic extraction of zinc, copper, nickel, and other metals from solutions, it replaces lead anodes, avoiding lead contamination and enhancing cathode product purity.

The ShenAo Advantage

17 A long time of Fabricating Excellence

Since 2008, we've specialized in valuable metal coated titanium anodes from our office in Baoji's "China Titanium Valley." Our develop bimetallic hazardous welding innovation and progressed coating forms provide items you can trust.

Customization for Your Correct Needs

Every generation line is diverse. We give custom fitted arrangements coordinating your particular current thickness necessities, electrolyte composition, and operational parameters. Whether you require little bunch testing or full-scale generation amounts, we convey on time.

Cost-Effective Lifecycle Management

When coating exhaustion happens, you do not dispose of the whole anode. Our proficient recoating benefit strips the ancient oxide layer, sandblasts the substrate, and reapplies new MMO coating. This expands resource life and decreases your add up to taken a toll of proprietorship considerably.

Frequently Asked Questions

Q: How do I choose between a titanium and niobium substrate?
A: The rule of thumb: if your electrolyte contains fluoride ions (even trace amounts) or requires long-term operation in concentrated sulfuric acid above 60°C, choose niobium. For conventional acidic, fluoride-free systems, titanium is fully competent and more economical. When in doubt, send us an electrolyte sample for analysis.

Q: What is the core difference between iridium oxide and ruthenium oxide coatings in oxygen evolution applications?
A: Simply put, ruthenium oxide has higher oxygen evolution catalytic activity (lower onset potential) but also corrodes relatively easily at that potential, leading to shorter life. Iridium oxide trades a bit of activity for significantly extended lifespan under oxygen evolution conditions. If longevity is your priority, iridium is the more suitable choice.

Q: What signs indicate coating depletion?
A: The most direct signal is a gradual, persistent increase in cell voltage. When the cell voltage rises 1.0-1.5V above the initial operating value, it usually indicates the coating is nearing its end of life. We recommend keeping a regular voltage monitoring log to predict the replacement window.

Q: Can you customize the anode shape to fit my existing cell structure?
A: Yes. Whether it's a custom-shaped plate to match existing mounting fixtures, or perforated tubes and woven meshes designed to optimize fluid distribution, we can fabricate to your drawings. Just provide the specifications, and we'll deliver a fully compatible product.

Q: Given the high cost of iridium, how do I determine an economical coating loading?
A: Loading directly determines both lifespan and cost. For continuous production lines where annual shutdowns for electrode replacement are extremely costly, we typically recommend a slightly higher loading to extend replacement intervals. For batch processes where replacement is less disruptive, standard loading is sufficiently economical. Discuss your production rhythm with our engineers, and we will provide a balanced recommendation.

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Contact Us

You need a partner who not only supplies products but also solves your challenges alongside you. Our team is ready to engage with your inquiries and provide a tailored solution. Share your specific needs or key requirements with us today, and let us help you efficiently transform your breakthroughs into commercial value.

Titanium Anode Manufacturer

Email: zh@baojiti.com.cn

WhatsApp: +86-15877696471 (updated)

Products: Titanium Anodes, MMO Titanium Anodes, DSA Coated Titanium Electrodes, Electrolysis Electrodes, Hydrogen Production Electrodes, Wastewater Treatment Titanium Anodes.