Titanium Mesh Anode for Membrane Chlor-Alkali Process

​​​​​​​Titanium Mesh Anode for Membrane Chlor-Alkali Process

In membrane chlor-alkali electrolyzers, the chlorine evolution catalytic activity and structural design of the anode have a critical influence on electrolysis energy consumption, chlorine gas purity, and ion-exchange membrane service life. Our Titanium Mesh Anode for Membrane Chlor-Alkali Process at Baoji City ShenAo Metal Materials Co., Ltd. is designed specifically for efficient and stable operation in conjunction with perfluorosulfonic acid or perfluorocarboxylic acid membrane electrolyzers. It uses Grade 1 or Grade 2 pure titanium expanded mesh as the substrate, with a ruthenium-iridium mixed metal oxide catalytic coating on the surface. The mesh structure provides favorable flow and gas venting channels for the saturated brine within the anode compartment, enabling chlorine bubbles to rapidly detach from the anode surface and enter the gas-liquid separation zone, reducing the loss of effective reaction area caused by bubble coverage. The ruthenium component imparts a very low chlorine evolution overpotential to the coating in saturated brine, while the introduction of the iridium component enhances the structural stability of the coating during the oxygen evolution side reaction at high current densities. This anode is suitable for various types of membrane chlor-alkali electrolyzers, serving as a reliable electrode solution for achieving low cell voltage, high current efficiency, and long-cycle stable operation.

This product is for B2B Industrial Use Only. Operators should follow relevant chemical safety protocols and chlor-alkali electrolysis operation standards.

Technical Specifications

Why Choose Our Titanium Anodes?

• Expanded Mesh Structure Optimized for Bubble Management and Mass Transfer Efficiency
  The expanded mesh anode features an open area ratio of 30%–50%, providing favorable flow and venting channels for saturated brine and chlorine bubbles within the anode compartment. Chlorine bubbles can rapidly pass through the mesh openings into the gas-liquid separation zone after formation, reducing bubble attachment time and coverage area on the anode surface. During high current density operation, this effectively reduces the additional ohmic voltage drop and uneven current distribution caused by the bubble effect. The mesh structure also facilitates the replenishment of fresh brine to the electrode surface, alleviating concentration polarization at high current densities.
• Long-Term Stability in High-Temperature Saturated Brine Environments
  The anode compartment of membrane electrolyzers presents a highly corrosive environment where high-temperature (80–90°C) saturated brine and wet chlorine gas coexist, placing stringent demands on the chemical stability of the anode coating and the mechanical strength of the substrate. Our ruthenium-iridium coating forms a sound metallurgical bond with the titanium expanded mesh substrate, maintaining stable chlorine evolution catalytic activity and structural integrity during long-term high-temperature operation. The protective film formed by self-passivation of the titanium substrate in the brine environment further enhances the electrode's corrosion resistance, ensuring long-cycle safe operation of the electrolyzer.
• Very Low Chlorine Evolution Overpotential for Reduced DC Power Consumption
  The ruthenium-iridium coating exhibits a very low chlorine evolution overpotential in saturated brine systems, enabling efficient chlorine evolution at low cell voltage even at industrial-grade current densities of 4,000–6,000 A/m². For large-scale chlor-alkali plants with annual capacities of hundreds of thousands of tons of caustic soda, the DC power savings from every 0.1V reduction in cell voltage can be noteworthy over long-term operation, directly improving the comprehensive energy consumption indicators of chlor-alkali production.
• Proven Solutions Compatible with Mainstream Membrane Electrolyzers
  We can provide matched titanium mesh anode dimensions, mesh specifications, and conductive connection methods based on the anode compartment design parameters of mainstream membrane electrolyzers from manufacturers such as Asahi Kasei, Asahi Glass, De Nora, and Bluestar. The diamond or round hole structure of the expanded mesh can be customized according to customer requirements, and the bus bar connection interface adopts standard designs matched to the electrolyzer bus bars, enabling convenient replacement and seamless compatibility with existing chlor-alkali production lines.

Real-World Applications

• Chlor-Alkali Industrial Production: Used as anode assemblies in membrane-process caustic soda production units, covering brine electrolysis for chlorine gas and caustic soda production in large-scale chlor-alkali enterprises, providing efficient chlorine evolution electrodes for electrolyzers with annual capacities of tens to hundreds of thousands of tons of caustic soda.
• Chlorate and Perchlorate Production: Used for the electrolytic production of halogen chemicals such as sodium chlorate, potassium chlorate, and perchlorates, covering deep electrolytic oxidation processes of brine, providing stable chlorine and oxygen evolution catalytic activity in chloride-containing systems.
• Seawater Electrolysis for Chlorine Generation: Used as anode assemblies in large-scale seawater electrolysis chlorine generation units, covering online chlorination equipment for coastal power plant cooling water antifouling and ship ballast water treatment systems.
• Chlor-Alkali Equipment Manufacturing and Maintenance: Used for OEM anode supply to chlor-alkali electrolyzer manufacturers, as well as anode replacement and upgrading of existing chlor-alkali plants, providing customized titanium mesh anode manufacturing and recoating services.

The ShenAo Advantage

18 Years 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: What are the requirements for mesh specifications of titanium mesh anodes in membrane electrolyzers?
A: Mesh specifications directly influence bubble detachment efficiency and current distribution uniformity. The short pitch and long pitch of diamond expanded mesh determine the open area ratio and mesh surface thickness, with open area ratios typically controlled between 30% and 50% to balance bubble management and effective reaction area. Different electrolyzer manufacturers have their own design standards for mesh specifications. We can customize matched mesh parameters according to your electrolyzer model and design requirements.

Q: How is the ruthenium-to-iridium ratio in the coating determined?
A: It primarily depends on the operating current density and brine quality of the electrolyzer. Higher current density and a greater proportion of the oxygen evolution side reaction necessitate an appropriately increased iridium content to enhance coating durability. Impurity ion content such as calcium, magnesium, and iron in the brine also affects coating life, and high-quality purified brine is conducive to extending the anode service cycle. You can provide the operating parameters and brine quality indicators of your electrolyzer, and our engineers will recommend a suitable ratio solution.

Q: What is the recoating interval for titanium mesh anodes?
A: Under normal brine quality and current density conditions, the service life of ruthenium-iridium coated titanium mesh anodes can typically reach 8–15 years. When the coating reaches the end of its service life, the titanium mesh substrate usually retains good structural integrity and can be recoated after chemical stripping of the old coating, restoring performance to new anode levels. The recoating interval and number of recoating cycles depend on the degree of substrate corrosion. We can assess the feasibility of recoating after incoming inspection of used anodes.

Q: What installation precautions should be observed when replacing titanium mesh anodes?
A: During installation, ensure that the anode mesh surface is flat and free of distortion, maintaining the design-specified gap from the ion-exchange membrane. The bus bar contact surfaces should be clean and flat, with bolt tightening torques applied according to the electrolyzer manufacturer's recommended values. During initial energization, the current should be gradually increased to the rated value according to operating procedures to avoid current shock damage to the coating. We can provide installation technical guidance and on-site service support.

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.