Overview Of Titanium Anode Development
Electrode is an important component in electrolysis engineering. Its performance directly affects the level of electrolysis efficiency, the cost and quality of electrolysis products, and the electrode material determines the performance of the electrode. Therefore, in the development process of the electrochemical industry, The development of new electrode materials with excellent performance has always been valued by researchers and engineers from all over the world. The development of electrode materials has gone through multiple stages of graphite electrodes, iron oxide electrodes, lead-based alloy electrodes, precious metal electrodes and titanium-based coated electrodes. In 1896, E.G.Acheson successfully produced artificial graphite by electrothermal crystallization and applied it in the production of salt water electrolysis. Since then, the electrolysis industry has entered the era of graphite electrodes. Salt water electrolysis requires electrode materials to have good electrocatalytic performance for the precipitation of chlorine, good durability, and the ability to inhibit the precipitation of oxygen. When the salt water concentration is high, the graphite electrode can fully meet the above requirements, but the graphite anode has the following shortcomings in the long-term production: large resistance and large power consumption; with the progress of the electrochemical reaction process, the electrode loss increases and the electrode pitch Changes have occurred, resulting in unstable electrolysis production, and the active surface of the chlorine evolution reaction is difficult to maintain stably.
In order to overcome the above shortcomings of graphite electrodes, there is an urgent need to replace non-metallic graphite electrode materials with metal electrode materials. In this case, people invented lead-based alloy electrodes to replace graphite electrodes. Lead-based alloy electrodes have the advantages of low price, easy forming, automatic repair of surface oxides even if they are damaged, and stable operation in electrolyte. However, it has the following fatal shortcomings in long-term production practice: (1) The electrode is large in weight and low in strength, and it is prone to deformation during use, causing short circuits and reducing current efficiency. (2) The electrode conductivity is not good enough, and the power consumption is relatively large. Therefore, it is urgent to find a new electrode to replace the lead-based alloy electrode.
In the 1960s, the Dutchman Henri Bernard Beer, after years of hard work, found a new type of anode with long life, high electrochemical catalytic performance, and no secondary pollution—a titanium substrate coated with ruthenium oxide-based insoluble anode (referred to as DSA) , And achieved industrialization in 1968. The appearance of coated titanium anode overcomes the shortcomings of traditional graphite and lead-based alloy electrodes, solves many problems encountered in daily life and production practice, and greatly improves the appearance of the electrolytic industry sector. It is known as the chlor-alkali industry. A big technology. Since then, the development of electrodes has entered the era of titanium electrodes.
