Chlorine gas is a critical industrial chemical used in water treatment, pulp bleaching, and disinfection. Titanium electrodes, specifically coated with mixed metal oxides (MMO), have revolutionized chlorine generation by offering unmatched durability, efficiency, and cost savings.
How Titanium Electrodes Enable Chlorine Generation
1. Material And Coating
Titanium Substrate: Grade 1 or 2 titanium (99.5% purity) provides a lightweight yet robust base. Its passive oxide layer resists corrosion in chloride-rich environments, even at high temperatures (up to 80°C).
MMO Coating: A thin (1–5 μm) layer of ruthenium (Ru), iridium (Ir), and titanium (Ti) oxides is applied via thermal decomposition. This coating:
Lowers the overpotential for chlorine evolution (200–300 mV), reducing energy consumption by 15–20% compared to graphite electrodes.
Selectively promotes chloride oxidation 2Cl- → Cl2 + 2e- over oxygen evolution 2H2O → O2 + 4H+ + 4e-, ensuring high chlorine purity (>99%)
2. Electrochemical Process
In a typical electrolytic cell:
Anode Reaction: Chloride ions in brine (NaCl solution) are oxidized at the titanium electrode surface to form chlorine gas.
Cathode Reaction: Water is reduced to hydrogen gas and hydroxide ions 2H2O + 2e- → H2 + 2OH-, creating sodium hydroxide (NaOH) in the process.
Separator: A diaphragm or membrane keeps chlorine and hydroxide separate, preventing unwanted reactions.
Advantages of Titanium Electrodes
1. Long Service Life
Withstand 5–10 years of continuous operation in industrial cells, compared to 1–2 years for graphite or 3–4 years for platinum-coated anodes.
2. High Current Efficiency
Maintain 95–98% current efficiency for chlorine production, even at high current densities (3–5 kA/m²). This translates to:
Lower energy costs: A 1,000-ton/day chlorine plant saves ~$500,000 annually on electricity compared to outdated electrodes.
Compact cell design: Higher current density reduces cell footprint by 30%.
3. Corrosion Resistance
Thrive in harsh environments:
Brine with 250–300 g/L NaCl
pH 1–13
Temperatures up to 90°C
Resistant to pitting and crevice corrosion, unlike stainless steel or nickel electrodes.
Applications in Chlorine Production
1. Industrial Chlor-Alkali Cells
Membrane Cells: Titanium anodes are standard in modern plants, producing chlorine, hydrogen, and high-purity caustic soda (NaOH).
Diaphragm Cells: Used in older facilities, where titanium electrodes improve efficiency and reduce mercury contamination risks.
2. On-Site Chlorine Generators
Water Treatment: Compact systems for pools, wastewater plants, and desalination facilities.
Ballast Water Treatment: Generate chlorine on ships to disinfect ballast water, preventing invasive species transfer.
3. Hypochlorite Production
Electrochemically produce sodium hypochlorite (NaOCl) for disinfection. Titanium electrodes enable efficient, on-demand generation without transporting hazardous chemicals.
Company Profile
Qixin titanium Co.Ltd, is a leading manufacturer specializing in coated titanium anode. With an extensive historyand a wealth of expertise, we have been dedicated to providing high-quality products and solutions to variousindustries for many years.Our company was established 2006, and since then, we have accumulated 18 years of valuable manufacturingexperience. This experience has enabled us to master the art and science of producing top-notch coated titaniumanodes that meet the most stringent quality standards.We take pride in our state-of-the -art manufacturing facilities and a team of highly skilled professionals. Ourengineers and technicians are experts in the field, constantly researching and innovating to improve our productsand processes.
production
1. Substrate treatment: it needs to be treated by roughing, cleaning and removing oil, which can increase the compactness of catalytic.
2. Brushing coating:After substrate treatment, it will be proceeded brush coated. The main coated content is platinum group metal, which is a kind of mixed solution.Then, heat treatment will be going on after drying.The whole procedure need to be repeated many times. This method is better to form thin oxide catalytic that is lamellar adhere to substrate surface.
Why Choose Us?
Unrivaled Product Quality
Crafted from premium titanium with precision and strict quality control, our anodes use advanced coating methods like thermal decomposition. Catalytic layers such as RuO₂-IrO₂ or SnO₂-Sb₂O₃ boost corrosion resistance, electrochemical activity, and lifespan.
Exceptional Performance
With low overpotential, our anodes cut energy use by up to 30% in electrochemical oxidation. High current efficiency enables fast degradation of organic pollutants, heavy metals, and PFAS across various wastewater types.
Customized Solutions
We customize anode coating, thickness, and structure. Our experts analyze your project to ensure cost-effective, optimized performance.
Extensive Industry Experience
Years of work in textiles, pharmaceuticals, and mining give us deep expertise for proactive problem-solving.
Comprehensive Technical Support
Our support covers installation, maintenance, troubleshooting, and staff training.
Sustainable and Environmentally Friendly
Designed to reduce energy use and heavy metal release, our anodes prioritize sustainability, with ongoing R&D for improvements.
Competitive Pricing
Despite top quality, optimized processes and supply chains make our anodes affordable.
Choose us for superior quality, performance, and service. Contact us to achieve your wastewater treatment goals.
Quality assurance and after-sales service
1.We promise that our substrate is high quality,acceleratd life test.The coating solution is configured according to the certain proportion.
2.With the high technology and equipment,All of our tecnical personnel have abundant experience,and our workers are very skilled.During the production of the Titanium anode, each process must carry on the strict examination,Such as the detection of surface rougghness,The quality of coating solution,coating evenness and so on.
3.We have our own production,sales and after-service department.We are usually dedicated to provide customers with high quality and reasonable price product.Most importantly ,we can provide the efficient service.
4.Each procedure will be carefully detected in the technical staff to compelete.accomplish the order in time and delivery on time.
5.During our cooperation,if you have any problem ,you can contact us at anytime,we will do our umost to help you.
