Categories
What is MMO Coated Titanium Anode?
Mar 20th,2025
616 Views
MMO coated titanium anode also named dimensionally stable anode(DSA), which is widely to be used in many electrolysis industries.
A, Composition and Principle
It is use pure titanium as substrate, becasue titanium has perfect corrosion resistance and mechanical strength that makes the anode has stable structure, meanwhile, it has capability of withstanding the electrochemical and physical effects during the electrolysis process.
According to special coating technique, the titanium surface is coated metal oxide coatings with catalytic activity. These coatings are mainly composed with precious metal oxide, such as Ru, Ir, Ta ect..The oxided coatings can reduce the overpotential during reaction process. At the same time, they can improve the electrocatalytic activity.
B, Performance and Features
a, High catalytic activity
The precious metal oxide coating on the surface of titanium anode can significantly reduce the activation energy of electrode reaction. During the electrolysis process, this allows the reaction to occur at a lower potential, accelerating the reaction rate. In some industries, titanium anodes have high catalytic activity for the oxidation reaction of chloride ions, which can efficiently convert chloride ions into chlorine gas. Compared with traditional anodes, titanium anodes greatly improve production efficiency.
b, Better Conductivity
The precious metal coating has further optimizes the conductivity of the anode. Good conductivity ensures that the current can be evenly distributed on the anode surface during the electrolysis process, reducing local overheating and high current density. This is very important for maintaining the stability and uniformity of the electrolytic reaction, for example, in the electroplating process, it can make the plated layer deposit more evenly on the object being plated.
c, Perfect Corrosion Resistance
The corrosion resistance of the titanium substrate combined with the protective effect of the coating enables the titanium anode to be used in various harsh chemical environments. Whether it is acidic, alkaline, or electrolytes containing strong oxidants and corrosives, titanium anodes can maintain good performance. For example, titanium anodes can resist the corrosion of seawater and work stably for a long time.
d, Stable Dimension
Comared with traditional anodes, titanium anode The titanium anode will not be changed on its sizes during the electrolysis process due to chemical reactions. This dimensional stability makes it easier to install and use in electrolysis equipment, and can ensure that parameters such as electrode spacing in the electrolysis cell remain stable, which is beneficial for maintaining stable electrochemical reactions.
C, Field of Application
a, Chlor-alkali Industry
This is one of the most widely used fields for titanium anodes. In the process of electrolyzing sodium chloride solution to produce chlorine gas, hydrogen gas, and sodium hydroxide, the high catalytic activity and corrosion resistance of titanium anode make it an ideal anode material. It can effectively oxidize chloride ions in sodium chloride solution into chlorine gas, improve the yield and purity of chlorine gas, and reduce the occurrence of side reactions such as electrode loss.
b, Eletroplating
During the electroplating process, titanium anodes are used as insoluble anodes. It can provide a stable redox environment for metal ions in the plating solution, ensuring the smooth progress of the plating reaction. Moreover, due to its stable size and good conductivity, it can improve the quality and uniform thickness of the plating layer, and is widely used in various metal electroplating, such as copper plating, zinc plating, nickel plating, etc.
c, Water Treatment and Environmental Engineering
Used for electrolytic water disinfection and wastewater treatment. In electrolytic water disinfection, titanium anodes can produce disinfectants such as sodium hypochlorite by electrolyzing saltwater, which are used to kill harmful microorganisms such as bacteria and viruses in water. In terms of wastewater treatment, it can be used to treat wastewater containing heavy metal ions, by precipitating or converting heavy metal ions into harmless forms through electrolytic reduction reactions.
d, Electrolytic metal extraction and refining
In the process of metal extraction and refining, titanium anodes can be used for electrolytic extraction of some active metals, such as magnesium, aluminum, etc. Meanwhile, in the process of metal refining, it can help remove impurities from the metal and improve its purity. For example, in the process of aluminum electrolysis, titanium anodes can effectively promote the electrolysis reaction of aluminum oxide, improving the production efficiency and quality of aluminum.
