Products Description
1. Substrate Metal Chemical Composition:
| Grade | N | C | H | Fe | O | Ti |
| Grade1 | 0.03 | 0.08 | 0.015 | 0.20 | 0.18 | bal |
2, Substrate Metal Mechanical Properties:
| Grade | Tensile strength(min) | Yield strength(min) | Elongation (%) | ||
| ksi | MPa | ksi | Mpa | ||
| Gr1 | 35 | 240 | 25 | 170 | 24 |
There are several reasons for ruthenium iridium titanium anode passivation.
a. Coating peeling
The titanium ruthenium iridium titanium anode is composed of a titanium substrate and a ruthenium iridium titanium active coating. The only electrochemical reaction is the ruthenium iridium titanium active coating. If the coating is not firmly bonded to the substrate
Solid, detached from the titanium plate substrate, to a certain extent, the titanium ruthenium iridium titanium anode loses its function. (Divided into crushing type detachment, convex belly type delamination, and cracking type detachment)
b. RuO2 dissolution
The occurrence of reduced oxygen can slow down the formation of oxide films. When the total current density of electrolysis increases, the rate of chlorine generation increases much more than the rate of oxygen generation, so an increase in current density is beneficial for reducing the oxygen content in chlorine. The titanium substrate undergoes pre oxidation treatment, forming a layer of oxide film first, which can increase the binding force between the ruthenium iridium titanium active coating and the titanium substrate, making the coating firm and preventing the detachment and dissolution of ruthenium. However, it can also cause an increase in the ohmic drop of the ruthenium iridium titanium anode.
c. Oxide saturation
The active coating is composed of non stoichiometric RuO2- and TiO2, belonging to the category of anoxic oxides. The true activation center for chlorine discharge is non stoichiometric oxides. The more such oxides there are, the more active centers there are, and the better the activity of the ruthenium iridium titanium anode. The conductivity of ruthenium iridium titanium coated anodes is characterized by the formation of distorted n-type mixed crystals from the same crystal type RuO2 and TiO2 after heat treatment, with some oxygen vacancies present. When these oxygen vacancies are filled with oxygen, the overpotential rapidly increases, leading to passivation.
d. Cracks in the coating
During electrolysis, new ecological oxygen is generated on the ruthenium iridium titanium anode, with some of it discharging at the interface between the active coating and the electrolyte, and then leaving the anode surface to generate oxygen and entering the solution; Due to the presence of cracks in the active coating, while another part of oxygen adsorbs on the anode surface, it spreads or migrates through the active coating to reach the interface between the coating and the titanium plate substrate. Then, oxygen is chemically adsorbed on the titanium substrate surface, forming a non-conductive oxide film (TiO2) with titanium, generating reverse resistance; Alternatively, the electrolyte invades through the cracks in the coating, causing the titanium substrate to slowly oxidize and corrode at the interface with the ruthenium iridium titanium active coating, causing the ruthenium iridium titanium active coating to detach and increasing the anode potential of the ruthenium iridium titanium. The increase in potential further promotes the dissolution of the coating and the oxidation of the titanium substrate
Our advantage
High quality products
Titanium anode factories can provide high-quality titanium anode products with excellent corrosion resistance, wear resistance, and high temperature resistance.
Diversified product models
Titanium anode factories can produce various specifications and models of titanium anode products according to the different needs of customers to meet their various needs
Advanced production processes
The titanium anode factory widely adopts advanced production and processing technology to ensure that the products produced have stable quality and performance.
High quality service
The titanium anode factory has a professional customer service team that can provide customers with high-quality service and support 24/7 to ensure that customers receive the best user experience.
Our company is a private enterprise specializing in research, development, production and sales of all kinds of composite material and titanium material,Our products:Ru-ir coating titanium anode,platium coating titanium anode,Ir-ta coating titanium anode,titanium cathode.Our team has more than 10 years relevant experience, and through the continuous development and introduction of technology, our products get approved and been supplied in many countries around the world, such as USA, Germany, France,Brazil,Spain,Japan,Korea,Indonesia,Vietnam,Malaysia,Pakistan, etc.
Ruthenium iridium tantalum coated titanium anodes have many advantages in the electrochemical field, including:
1. Strong corrosion resistance: Ruthenium iridium tantalum coated titanium anodes have excellent corrosion resistance and can be used for a long time in acidic and alkaline environments without corrosion, making them suitable for various chemical reactions and sewage treatment.
2. High stability: The ruthenium iridium tantalum coated titanium anode has high stability and heat resistance, can withstand high temperature and high pressure conditions, and does not deform or ablate for long-term use.
3. High electrocatalytic efficiency: The surface of ruthenium iridium tantalum coated titanium anode is smooth and has high catalytic efficiency, accelerating the electrochemical reaction speed and improving reaction efficiency, thereby reducing the reaction time and energy consumption, and reducing costs.
4. Long service life: Due to the excellent corrosion resistance and stability of ruthenium iridium tantalum coated titanium anodes, they have a long service life and can be used for a long time in various environments, avoiding the cost of frequent replacement.
5. High safety: Due to its ability to withstand high temperature and high pressure conditions, ruthenium iridium tantalum coated titanium anodes do not produce hazardous substances during use, thus possessing high safety.
In summary, ruthenium iridium tantalum coated titanium anodes have many advantages, making them widely used in fields such as electrochemistry, chemical reactions, and sewage treatment, becoming an important new material.
Example
The electrolytic extraction of metals in sulfuric acid solution, the precipitation of oxygen on the anode, and the selection of appropriate anode materials is a very important issue. The titanium electrode coated with tantalum iridium series has low oxygen overpotential and is not corroded by electrolyte. The iridium oxide coating exhibits excellent electrolytic durability. The initial anode potential was 1.51V, and after 6000 hours, it was 1.64V. The weight loss of the coating was 0mg/cm2.
When using lead based alloy electrodes (containing 6% to 15% Sb or 1% Ag) in electrolytic production, the lead anode will dissolve, consuming the anode material and affecting the anode's service life. Moreover, the lead dissolved in the solution will precipitate on the cathode, increasing the lead impurities in the metal and reducing product quality.
The ruthenium based coating will be severely damaged under this working condition, so it is not suitable for use. The initial anode potential was 1.48V, and after 1000 hours, it rose to 2.0V, indicating that the anode had been passivated.
Precious metal coated titanium anodes have excellent electrocatalytic activity and electrochemical performance, and have a certain service life. They have been widely used in the chlor alkali industry, high-speed electroplating industry, and other industries. In the field of non-ferrous metal electrolysis, represented by electrolytic zinc, precious metal coated anodes also reflect the characteristics of energy conservation, efficiency, and environmental protection. In recent years, they have received increasing attention from researchers. The following aspects need to be further explored and studied:
1) Improvement of coating formula. Traditional rare and precious metal coatings such as RuO2 and IrO2 have high costs. On the basis of not affecting conductivity and service life, adding some low-cost metal materials to reduce raw material costs can achieve better industrial promotion.
2) The enhancement of the bonding strength between the coating and the substrate. Titanium anodes are mainly prepared by thermal decomposition and electrochemical deposition methods, with low bonding strength and easy peeling. New methods and processes are sought to enhance the bonding force between the coating and the substrate, change the bonding method, and extend the service life.
3) Further research is needed on the corrosion failure mechanism in multiphase and complex systems. Electrochemical corrosion, acidification corrosion, and oxidation corrosion coexist in the electrolysis system. By exploring the corrosion intensity and failure mechanisms of various types of corrosion, targeted development of long-life anodes can be achieved.
Country:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel/Whatsapp :+86 18309262795
Email:annie@jmyunti.com
Website:www.jm-titanium.com
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