The soluble anode in the electrolysis process of added metal ions and the conductive role, insoluble anode conductive role only.Is the earliest insoluble anode graphite and lead anode of titanium anode in the 1970 s as a new technology used in electrolysis and electroplating industry.The insoluble anode can be divided into two broad categories: chlorine evolution anodes and oxygen evolution anode.Chlorine evolution anodes is mainly used for chloride electrolysis system, in the process of electroplating anode with free chlorine, so called chlorine evolution anodes;Oxygen evolution anode is mainly used for sulfate, nitrate, hydrocyanic acid salt electrolytic fluid system, such as electroplating anode in the process of oxygen is released, so called the oxygen evolution anode.Lead alloy anode oxygen evolution anode, titanium anode respectively according to their different surface catalytic coating effect with functions of oxygen, chlorine, or both.
Chlor-alkali industrial titanium anode
Compared with graphite electrode, the method of diaphragm caustic soda production, the working voltage of graphite anode for 8 a/DM2 coating anode can be multiplied, up to 17 a/DM2.This product can be doubled in the same electrolysis environment, and the raw products of high quality, high purity chlorine.
Plating titanium anode
Plating on titanium substrate with insoluble anode is (mesh, plate, strip, tube, etc.) on the coating with high electrochemical catalytic properties of noble metal oxide coating, coating of valve metal oxide containing high stability.New insoluble titanium anode with high electrochemical catalytic ability, oxygen evolution overpotential is lower than insoluble lead alloy anode is about 0.5 V, significant energy saving, high stability, polluting the plating solution, light weight, easy to replace.New type of titanium insoluble anode of the oxygen evolution potential and less than platinum plating insoluble anode, but life is more than double.Is widely used in various kinds of plating used as anode or auxiliary anode, can replace conventional lead alloy anode, in the same conditions, can lower the cell voltage, save power consumption;Insoluble titanium anode in the electroplating process has a good stability (chemical, electrochemical), long service life.This gold-plated anode is widely used in nickel plating, chrome plating, galvanized, electroplating non-ferrous metals such as copper plating industry.
Lead and lead alloy anode
Belongs to the oxygen evolution anode lead alloy anode, oxygen evolution reaction of the electrolyte for sulfuric acid and sulfate, is mainly used for metallurgical electrolysis.Such anode electrolysis in the process of the defects of geometry size will change.First of all, in the process of electrolysis, lead anode matrix into lead sulfate, and then into the lead.Lead sulfate is a middle tier, it is an insulator, to play the role of a chemical barrier layer, can protect the inner lead substrate in sulfate environment.Lead oxide in the outer layer is the practical significance of electrode, the oxygen evolution reaction, oxygen evolution potential of lead oxide is very high, and with the increase of current density increases rapidly, the feature of lead alloy anode is lead oxide by its outer layers of the inherent characteristics of lead oxide - is a poor conductor of electricity.In addition, in the process of electrolysis, electrochemical properties of lead oxide anode structure constantly attenuation, falls off to produce oxide layers of its internal stress, in addition, the formation of lead oxide and lead to oxide dissolution, as an intermediary lead sulfate is converted to once again lead oxide, become the new outer oxide electric catalytic active substance, the inner layer of lead substrate by oxidation, form a new lead sulfate layer in the middle.As a result, in the process of electrolysis, lead and its alloys are dissolved into electrolyte and precipitation in the solution pollution (chemical precipitation in the solution) and cathode product contamination (contaminants on the surface of the cathode electrodeposition, electrolysis to the purity of copper not good guaranteed).
Coating titanium anode
Coating titanium Anode, called DSA (Dimensionally Stable Anode dimension Stable Anode), also called DSE arithmetic (Dimensionally Stable Electrode), is developed in the late 1960 s, a new type of insoluble Anode material.DSA coating titanium anode is mainly used in the electrochemical and power metallurgy sector.
DSA coating titanium anode application areas are: chlor-alkali industry, chlorate production, production of hypochlorite, perchlorate, persulfate electrolysis, electrochemical organic synthesis, production of electrolytic extraction of non-ferrous metal, electrolytic silver catalyst, manufacturing electrolysis copper foil, electrolytic oxidation recycling mercury, electrolysis, chlorine dioxide production, hospital wastewater treatment, electroplating factory cyanide wastewater treatment, water and food utensils disinfection, power plant cooling circulating water treatment, woolen mill dyeing wastewater treatment, industrial water treatment, electrolysis legal system in acid and alkaline ionized water, copper zinc plated, rhodium, palladium plating, plating, plating lead, electrodialysis desalination, electrodialysis method take tetramethyl ammonium hydroxide, molten salt electrolysis, battery production, cathodic protection, in the production of the cathode foil, aluminum foil anodic oxidation, etc.Applications involving chemical, metallurgical, water treatment, environmental protection, electroplating, electrolysis and other fields in organic synthesis.
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