Titanium anode has excellent electrical conductivity and corrosion resistance, and its service life is much higher than that of lead anode. It can work stably for more than 4,000 hours and has low cost. It will be an inevitable trend in the development of electro-galvanizing and tin production at home and abroad. Titanium electrodes are currently used in Japan, the United States, Germany, and China, which not only greatly saves the energy consumption of electroplating, but also creates conditions for the production of thick galvanized and tin steel plates because it can increase the current density of electroplating.
Titanium anode classification:
1.Oxygen evolution anode (iridium-coated titanium electrode): The electrolyte is generally a sulfuric acid environment. The corresponding products of our company are iridium tantalum anode, iridium tantalum tin titanium anode, high iridium titanium anode. 3. Platinum-coated anode: titanium is the base material. The surface is coated with platinum, the thickness of the coating is generally 0.5-5μm, and the mesh size of the platinum titanium mesh is generally 12.5×4.5mm or 6×3.5mm. The ruthenium-iridium-titanium anode has a certain working life during the electrolytic operation. When the voltage rises so high that no current actually flows, the ruthenium-iridium-titanium anode loses its function, a phenomenon called anode passivation.
2. According to the gas evolution of the anode in the electrochemical reaction, it is called chlorine evolution anode, such as ruthenium-coated titanium electrode: the oxygen evolution anode, such as iridium-based coated titanium electrode and platinum titanium mesh /plate. Chlorine evolution anode (ruthenium-coated titanium electrode): The chloride ion content in the electrolyte is high, generally in the environment of hydrochloric acid, electrolysis of seawater, and electrolysis of salt water. The corresponding products of our company are ruthenium iridium titanium anode and ruthenium iridium tin titanium anode.
Ruthenium iridium titanium anode passivation has the following reasons.
(1) Coating peeling titanium ruthenium iridium titanium anode is composed of titanium substrate and ruthenium iridium titanium active coating, only the ruthenium iridium titanium active coating plays the role of electrochemical reaction. If it falls off to a certain extent, the titanium ruthenium iridium titanium anode will lose its function. (It is divided into pulverized exfoliation, convex belly exfoliation and cracking exfoliation.
(2). RuO2 dissolves to reduce the occurrence of oxygen, which can slow down the formation of oxide film. When the total current density of electrolysis increases, the rate of chlorine generation increases more than The increase in the rate of oxygen generation is much greater, so the increase in current density is beneficial to the reduction of the oxygen content in chlorine. The titanium substrate is pre-oxidized to form an oxide film first, which can increase the interaction between the ruthenium-iridium-titanium active coating and the titanium substrate. The bonding force makes the coating firm, which can prevent ruthenium from falling off and dissolving, but also causes the ohmic drop of the ruthenium iridium titanium anode to rise.
(3). The oxide saturated active coating is composed of non-stoichiometric RuO2- and TiO2 It is composed of oxygen-deficient oxides. What really acts as the activation center of chlorine discharge is the non-stoichiometric oxide. The more such oxides, the more active centers, and the better the activity of the ruthenium-iridium-titanium anode. The ruthenium-iridium-titanium coated anode The electrical conductivity is the performance exhibited by the distorted n-type mixed crystal generated from isomorphic RuO2 and TiO2 by heat treatment, in which there are some oxygen vacancies. When these oxygen vacancies are filled with oxygen, the overpotential rises rapidly, resulting in passive (3) When there are cracks in the coating, new ecological oxygen is generated on the ruthenium-iridium-titanium anode, some of which are discharged at the interface between the active coating and the electrolyte, and then leave the anode surface to generate oxygen into the solution; due to the existence of the active coating Cracks, while another part of oxygen is adsorbed on the surface of the anode, and reaches the interface between the coating and the substrate of the titanium plate through the active coating by diffusion or migration, and then the oxygen is chemically adsorbed on the surface of the titanium substrate, forming a non-conductive oxidation with titanium. film (TiO2), resulting in reverse resistance; or the electrolyte penetrates through the cracks in the coating, the titanium substrate is slowly oxidized, and the interface with the ruthenium-iridium-titanium active coating is corroded, causing the ruthenium-iridium-titanium active coating to fall off, resulting in the ruthenium-iridium active coating. The potential of the titanium anode increases. The increase of the potential further promotes the dissolution of the coating and the oxidation of the titanium matrix.
Over the years, we have been specialized in anode research and development, production and manufacturing, and our products are exported to many countries around the world. Various series of anodes can be designed and produced according to the actual environmental parameters of different users. You are welcome to visit and negotiate.
Nicole
Company: Baoji Jimiyun Dynamic Co., Ltd
Cuntry:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel:+86 13369210920
Website:www.jm-titanium.com
