Mmo Coating on Titanium

Product Description

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Mixed metal oxide (MMO) coating on titanium substrates are extensively utilized as anodes in a myriad of electrochemical processes, including chlorine generation in the chlor-alkali industry, oxygen production, metal electrowinning, and cathodic protection.

The use of materials with high conductivity and long-term stability in electrochemical environments remains a fundamental objective in electrochemical cell engineering. Metal oxides such as RuO2 and IrO2, known for their high conductivity and electrochemical activity, have garnered considerable attention in the electrochemical industry as effective electro-catalysts. To further enhance the stability of these oxides, additional oxides like TiO2, Ta2O5, and ZrO2 are often incorporated.

Anodic evolution of chlorine and oxygen are critical reactions in the application of these materials. The oxygen evolution reaction (OER) is pivotal in several electrochemical processes, including water electrolysis, metal electrowinning, and cathodic protection.

Moreover, this reaction can inevitably proceed in numerous anodic processes. Coatings based on RuO2, such as pure RuO2 and RuO2–TiO2, demonstrate significant stability for chlorine evolution reaction (CER). However, they tend to face substantial corrosion during anodic OER in acidic media. IrO2 shows greater stability for OER, but it exhibits lower electro-catalytic activity for OER. Hence, a mixed compound of IrO2 and RuO2 can be an optimal electro-catalyst for oxygen revolution, combining the beneficial properties of both oxides.

Blending different oxides can modify the electrocatalytic properties by altering the microstructure, surface composition, and morphology of the electrocatalyst components. These mixed oxide coatings feature non-homogeneous surface composition, morphology, and microstructure, which can be influenced by preparation techniques and the proportion of active oxides.

Di Noer can customize the oxide coating materials to meet specific solutions and environments for various applications.

Applications of MMO Coated Titanium Anodes

Ruthenium Mixed Oxide Coated Titanium Anode

Ruthenium mixed oxide coated titanium anode is typically used in environments like hydrochloric acid, electrolytic sea water, and electrolytic salt water.

Applications: Non-ferrous metal electrolysis production, chloride salt electrolysis, salt/seawater electrolysis, metal foil manufacturing, surface electrochemical treatment of metal foil, disinfection, non-ferrous metal electrolytic extraction and recovery, organic electrolysis, cathodic protection, electrodialysis, acid-base ionized water production, industrial wastewater treatment, and more.

Iridium Mixed Oxide Coated Titanium Anode

Iridium mixed oxide coated titanium anode is generally utilized in sulfuric acid environments or other oxygen evolution environments.

Applications: Non-ferrous metal electrolysis production, etching solution electrolytic copper recovery, surface electrochemical treatment of metal foil, organic electrosynthesis, cathodic protection, electrodialysis, acid-base ionized water production, industrial wastewater treatment, and more.

Apparatus and Method for Manufacturing MMO Anode

This invention pertains to the production of MMO anodes, which feature MMO coatings on metallic substrates. Specifically, it discusses the apparatus and method for manufacturing MMO anodes through continuous coating and heat treatment, aiming to produce high-quality long-line MMO anode efficiently and reduce production costs.

Challenges in Conventional Methods

Traditional methods of producing long-line MMO anodes require expansive manufacturing installations, prolonged coating times, and can lead to inhomogeneous coatings, reducing the MMO anode's lifespan and efficiency.

Innovations in Continuous Coating Technology

The use of continuous coating and heat treatment methods allows for the production of high-quality long-line MMO anodes. This technique involves a systematic process where the MMO solution is applied and cured uniformly along the metallic substrate’s length, enhancing durability and performance.

Detailed Manufacturing Process

The device designed for continuous MMO anode production consists of a drawing reel to supply metallic substrates, a continuous applicator for coating, and sequential heat treatment stoves. The preferred temperatures for preliminary and final heat treatment range between 300-700°C, with substrate transfer speeds of 1-5 m/min for preliminary treatment and 0.2-2 m/min for final heat treatments.

Fig. 4B illustrates the continuous manufacturing process where coating and heat treatment cycles are repeated multiple times to achieve the desired coating thickness and quality.

The specific embodiment

The preferred embodiments of the invention are explained in detail below with references to the accompanying drawings. These embodiments are not limited to the examples given; other forms can be implemented based on the principles described. The disclosed embodiments aim to provide thorough and complete details to enable those skilled in the art to fully understand and implement the invention.

Fig. 3 A and Fig. 3 B show the schematic representation of apparatus used for continuously manufacturing the MMO anode according to one embodiment. The device consists of a drawing tube, continuous applicator, hot preliminary treatment stove, heat-treatment furnace, and reel spool, ensuring a systematic and consistent application of the MMO coating solution.

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Process Optimization and Control

Controlling the speed and conditions of substrate movement ensures uniform application and heat treatment, resulting in consistent high-quality coatings even for long-line MMO anodes.

Contact us to discuss your requirements for iridium oxide coated titanium anodes. Our experienced sales team can help you identify the options that best suit your needs.