Titanium electrodes for electrolysis and electroplating, insoluble anodes are coated with noble metal oxide coatings with high electrochemical catalytic performance on titanium substrates (mesh, plate, ribbon, tubular, etc.). The new insoluble titanium anode has high electrochemical catalytic energy, and the oxygen evolution overpotential is about 0.5 V lower than that of the lead alloy insoluble anode. It has significant energy saving, high stability, no pollution to the plating solution, light weight and easy replacement. The oxygen evolution overpotential of the new insoluble titanium anode is also lower than that of the platinum-plated insoluble anode, but the life span is more than doubled. It is widely used as anode or auxiliary anode in various electroplating, and can replace conventional lead-based alloy anode. Under the same conditions, it can reduce cell voltage and save power consumption; insoluble titanium anode has good stability in the electroplating process. (chemical, electrochemical), long service life. This anode is widely used in nickel plating, gold plating, chrome plating, zinc plating, copper plating and other electroplating non-ferrous metal industries.
Titanium electrode Main application:
1. Electrolytic production of sodium hypochlorite in chlor-alkali industry and chlorate industry
The chemical industry that produces chlorine, hydrogen and caustic soda by electrolyzing salt solution is called the chlor-alkali industry, which is the largest field in the modern electrochemical industry and occupies an important position in the national economy.
In addition to the above, downstream products such as hydrogen chloride (aqueous solution is hydrochloric acid), sodium hypochlorite, chlorinated stone, polyvinyl chloride (referred to as PVCPolyvinyl chloride polymer = PVC molecular structure), hydrogen peroxide, etc. can also be prepared.
In the production of chlor-alkali, pure saturated brine is used as the electrolytic solution, titanium electrode is used as the anode, and asbestos wool with iron mesh is used as the cathode. The anode chamber produces chlorine gas, and the cathode chamber produces hydrogen and sodium hydroxide. in production.
The application of titanium anode has greatly promoted the development of the chlor-alkali industry and is an epoch-making contribution to the field of electrochemistry. The electrode has high catalytic activity for chlorine evolution, good electrocatalytic activity, mechanical stability and chemical stability for chlorine evolution reaction. It is an irreplaceable electrode material in today's chlor-alkali industry, with a service life of more than five years.
2. Electrolyzed functional water
Functional water is defined as water that can obtain various useful functions through artificial treatment. Electrolyzed water is popular as a sterilization treatment technology with good sterilization effect, strong practicability and no secondary pollution. The functional water is produced by electrolyzing drinking water or a trace amount of salt water through titanium electrodes, which is widely used in electrolysis water machines.
1) Use electrolysis to generate hypochlorite, new ecological oxygen, hydroxyl radicals and other strong oxidizing substances to kill microorganisms.
2) Use electrolytic electrodes to directly act on microorganisms to make them die.
3) Alkaline ionized water can directly treat a variety of diseases, effectively improve the metabolic function of the human body, eliminate free radicals of harmful acidic metabolites, and enhance physical fitness to prevent and improve disease resistance.
4) Acidic ionized water has the effect of inhibiting the growth of bacteria, and the effect is the same as that of beauty astringent water, and it is sterilized and disinfected with strong oxidizing properties.
3. Sodium hypochlorite generator, chlorine dioxide generator electrode manufacturing. (84 disinfectant)
Product appearance: plate, mesh, tube, etc., our company has long-term supply for a company in Hunan, the electrode size is mesh 370*350*1, the current density is 30~60A, and the voltage is 24V.
4. Cathodic protection
In the marine, hull, bridge and other steel use environments, due to the corrosion of impurities in the steel and micro-battery, and the complex natural environment, although corrosion-resistant alloy steel is selected and the thickness of the material is increased to coat with excellent corrosion-resistant paint, these Corrosion of structures is still very serious, posing a great threat to safety production, and cathodic protection is a convenient and important measure to effectively protect permanent steel structures in the ocean.
1) Using an impressed current to make the entire surface of the protected metal structure become a cathode, which is called impressed current cathodic protection.
2) Connect a metal or alloy with a more negative potential to the metal equipment to be protected, called sacrificial anode protection.
Applied to the following areas:
1) In fresh water and sea water, prevent corrosion of ships, docks, platforms, gates and cooling equipment.
2) In alkali and salt solutions, prevent the corrosion of storage tanks, evaporation tanks, boiling alkali pots, etc.
3) Prevent corrosion of pipelines and cables in soil and sea mud.
5. Gold-plated, steel galvanized and tin-plated
Titanium electrodes have excellent electrical conductivity and corrosion resistance, and their service life is much higher than that of lead anodes. They can work stably for more than 4,000 hours and have low costs. 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.
6. Non-ferrous metal extraction
Electrolytic metallurgy occupies a large proportion in the hydrometallurgy industry. The non-ferrous metals produced by electrolytic metallurgy include Zn, Cd, Cu, Mn, Co, Ni, Cr, etc.
The advantage of electrolytic metallurgy is that it has high selectivity, can obtain high-purity metals, and can recover useful metals. Therefore, it can process low-grade minerals and polymetallic ores with complex components, which is beneficial to the comprehensive utilization of resources. In addition, the pollution to the environment is small, and the production is easier to be continuous and automated.
Coated titanium electrodes have been widely used in the field of electrolytic extraction of metals in recent years, and it has become the second industrial field to use titanium electrodes on a large scale.
7. Electrolytic copper foil
With the development of science and technology, the degree of automation is increasing day by day, which has promoted the rapid development of the electronics industry. The application of large-scale integrated circuits has increased the demand for copper foil in the electronics and instrumentation industry, and the quality requirements of copper foil are also getting higher and higher.
According to the thickness, it can be divided into 105µm, 70µm, 35µm, 18µm, 12µm, 9µm and 5µm, among which copper foil below 12µm is generally called ultra-thin copper foil.
The electrolytic copper foil uses a metal roller partially immersed in a copper sulfate solution that rotates continuously as the cathode, and the foil is produced by continuous electrolysis. Internationally, the production of copper foil is mainly controlled by Japan, and there are about 15 domestic production enterprises with a production capacity of about 35,000 tons.
8. Sewage treatment
With the rapid development of industry and agriculture and population growth, the amount of sewage discharged by humans has increased sharply, resulting in many waters suffering from different degrees of pollution. Electrochemical treatment of sewage is divided into direct electrolysis and indirect electrolysis.
1) Direct electrolysis refers to the removal of pollutants from wastewater by direct oxidation or reduction on the electrodes. Direct electrolysis can be divided into cathodic process and anodic process. The anode process refers to the oxidation of pollutants on the anode surface and the conversion into less toxic substances or easily biodegradable substances, and even the inorganicization of organic matter, so as to achieve the purpose of reducing pollution. The cathode process refers to the reduction of pollutants on the cathode surface to remove them. Mainly used for reductive dehalogenation of halogenated hydrocarbons and recovery of heavy metals.
2) Indirect electrolysis refers to the use of electrochemically generated redox substances as reactants or catalysts to convert pollutants into less toxic substances. Indirect electrolysis can be divided into reversible and irreversible processes. The reversible process refers to the electrochemical regeneration and recycling of redox substances in the electrolysis process; the irreversible process refers to the oxidation of organic substances with substances produced by irreversible electrochemical reactions.
It is used in printing and dyeing wastewater treatment, landfill leachate treatment, fecal wastewater treatment, cyanide-containing wastewater treatment, pharmaceutical wastewater treatment, hospital wastewater treatment, and organic wastewater treatment.
9. Recycling of etching waste liquid from PCB electronic circuit board factory
Etching is an important process in the production of printed circuit boards. As the etching proceeds, the waste etching solution contains a large amount of copper ions or other metal ions, which can be recycled by electrolysis. Through this recycling process, enterprises not only increase economic benefits by recovering metals such as copper, but also achieve long-term social benefits by meeting emission standards and recycling resources.
The waste liquid includes: acid etching waste liquid, alkaline etching waste liquid, low copper-containing waste liquid, waste fixing liquid, waste frame material, nickel-containing waste liquid, waste liquid containing gold and palladium, waste tin stripping water.
5. Precautions for the use of electrodes
1. The titanium electrode has a black surface after oxidation and sintering. The uncoated surface is blue and has no electrode performance. The black side corresponds to the cathode.
2. Once the titanium electrode substrate is pickled, all subsequent production and processing procedures and use procedures must be carried out strictly and carefully. Wear clean gloves to get stuck at both ends or edges of the anode during transportation, preferably in contact with the uncoated part. Any foreign objects are strictly prohibited from scratching the coating surface.
Note: The titanium substrate itself is not conductive, and its outer layer is coated with a noble metal oxide coating that has electrocatalytic activity, conductivity, and oxidation resistance, but its thickness is only about 20 microns. During the process, the electrode will first corrode from the damage, which will affect the quality and effect of the entire electrode.
3. The electrolyte maintains stability, especially can not contain cyanide ions and fluoride ions, these impurities will seriously corrode the titanium matrix;
4. Add a filter device before the electrolyte enters the electrolytic cell, and cannot contain metal particles with a diameter greater than 0.1mm to prevent excessive aggregation and lead to short circuit of cathode and anode.
5. When recovering copper, nickel, gold, silver, cobalt and other metals by electrolysis, the cathode attachment should not be too thick to prevent the short-circuit breakdown of the cathode and anode due to the too small distance between electrodes or the formation of metal thorns.
6. The spacing between cathode and anode can be set according to actual production, generally 5-25mm. Generally speaking, the pole distance will increase the voltage drop, but it should not be too small, otherwise the cathode scale generated on the cathode surface will easily cause the short circuit of the plate;
7, to avoid the use of inverted poles. Once the noble metal oxide coating is used as a cathode, the surface undergoes a reduction reaction and is easily converted into a metal element, which cannot be effectively combined with the titanium base, causing the coating to fall off.
8. It is not advisable to soak in the solution in the power-off mode for a long time when the machine is stopped. It is best to load a small current of about 5A to protect the plate.
9. During shutdown or other maintenance conditions, add dilute acid or clean the surface of the electrode with clean water, but do not wash it with nylon or mechanical substances.
10. The temperature of the electrolyte should not be too high during operation. The ideal temperature is 25-40 °C. If conditions permit, a heat exchange device can be added to maintain the best use environment for the electrode.
11. The normal working current density is within 2000A/m², the excessive current will cause the reaction to be too intense and shorten the life of the anode;
12. When starting up, apply current to the electrolytic cell in a step-by-step manner, do not raise it to the position at one time, and the same is true when it is stopped.
13. Keep the anode clean during production and use, and can not be contaminated with oil or other attachments, so as not to affect the electrolysis effect and the life of the electrode.
14. The anode has life, ensuring production stability is more beneficial to prolong the service cycle.
Baoji JM-TITANIUM—Professional anode design and manufacturer
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
