Products Description
The main process of DSA coated titanium anode is to coat the surface of titanium matrix with special metal oxides, and the material selection is relatively strict, which needs to be able to ensure that the finished coating can withstand the impact of chemical reactions and currents, and also needs to have high conductivity and low internal resistance.
First of all, the surface needs to be treated, cleaned to remove surface oxidation, oil and other substances. Then the precious metal coating raw materials are mixed evenly and coated on the surface of the titanium matrix. The coating surface is treated with high temperature to form a dense and hard precious metal oxide layer on the surface, resulting in a highly active anode surface, which is finally treated with high temperature curing process.
The DSA-coated titanium anode is a high-performance metal material whose manufacturing process has been professionally designed and calibrated to ensure that the resulting coated titanium anode can withstand a variety of extreme temperature, pressure and current changes.
Product parameter
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Features
1,strong corrosion resistance : DSA titanium anode has excellent corrosion resistance, can remain stable in a variety of electrolytic environments, is not easy to be eroded or corroded, thus prolongating its service life
2,high strength and hardness : DSA titanium anode has very high strength and hardness, can withstand high pressure and high temperature environment, not easy to deformation or wear, to maintain long-term integrity and beauty
3,low energy consumption : DSA titanium anode has low energy consumption in the working process, which can significantly reduce the electric energy consumption in the electrolytic process, thus reducing the production cost
4,Long life : In industrial applications such as chlor-alkali production, DSA titanium anodes last significantly longer than other types of anodes, such as graphite and lead anodes, reducing replacement frequency and maintenance costs
5.high current density : DSA titanium anode can withstand high current density, improve the electrolytic efficiency, and further reduce the energy consumption
6.widely used : DSA titanium anode in industrial production, metallurgy, aviation, power, shipbuilding, electroplating and other fields have a wide range of applications, suitable for a variety of electrolytic processes
Precautions for using DSA platinum titanium anode
1,Before using platinum titanium anode, it is necessary to first eliminate (and detect) the presence of "fluorine" ions and "phosphate hate" ions in the plating solution. Before use, it must be confirmed that there is no chemical composition that corrodes the titanium anode to prevent damage to the titanium anode. Do not use hard chromium additives and recovered industrial chromium anhydride containing fluorine ions casually.
2. Reasonable selection of the best I process: It is best to choose an anode current density below 50A/dm, and a slot voltage below 10V, otherwise it will affect the service life, and in severe cases, it will cause melting holes in the anode and detachment of the coating. Anodizing should be chosen as much as possible
The process of reacting without solid oxide generation avoids the influence of oxide thickening and passivation on on anode conductivity.
The reason why the anode is broken down is determined by its characteristics.. When the groove pressure is greater than 10V, the titanium surface in contact with the platinum layer begins to dissolve slightly. At 12V, it is completely breakdown. After breakdown, the groove pressure we see cannot display 12V, only around 11V can be seen. At this point, the current cannot be added, and the anode is damaged. Therefore, we set a safe use groove pressure below 10V.
3.In general, the surface area of the cathode is less than the area of the effective anode, otherwise, the anode will not work properly.
4. If the impedance of the plating solution increases, its pressure will gradually increase.. When the bath pressure exceeds 10V, the current should not be further increased, but should be adjusted appropriately, such as reducing the current by 10% and extending the plating time by 10% (as long as it does not affect the plating)
There are many reasons for the increase in impedance, mainly including the following:
1. The anodic oxidation reaction thickens and passivates the oxide layer over time;
2. Due to the presence of virtual contact points or high-temperature passivation on the surface of the titanium plate in contact with the copper busbar;
3. The content of conductive medium in the plating solution decreases;
4. If the anode is punctured, the platinum coating will be damaged
5. Poor contact between the rectifier power supply and the busbar, etc.
Application of DSA titanium anodes sheet
Cathodic protection relies on external direct current or sacrificial anode to make the protected metal a cathode, thereby reducing or eliminating metal corrosion. Seawater is a complex solution containing various salts, therefore, electrode reactions are very complex, including anodic reactions, cathodic reactions, and in solution reactions
Anodic reaction: 2C1- → C2+2e
Cathodic reaction: 2H20+2e - → H2 ↑+2OH~
Reaction in solution: Cl2+H20 → HCI0+C1-+H+
HCIO - → H++CIO-
In addition, there are also oxygen evolution reactions and Mn plasma oxidation-reduction reactions on the anode, and the chlorine gas and water generated by the reactions generate hypochlorous acid and hydrochloric acid, leading to an increase in the surface acidity of the anode and accelerating the failure process of the anode. This is the reason why ordinary electrodes have a short lifespan as anodes in seawater. Platinum electrode has stable electrochemical performance and is an ideal insoluble electrode that can be used in almost any environment. At a certain potential, anodic passivation occurs on the surface of titanium, forming a layer of oxide film that serves as a valve, This means that it is not conductive in the anode state, but can be conductive in the cathode state. Selecting titanium as the substrate and electroplating platinum on it to make a platinum titanium electrode, even if there are pores on the anode surface, corrosion will not occur at the pores, because when it is energized as an anode, the substrate below the pores will automatically fill the oxide film on its body randomly. Platinum titanium electrode is easy to make, with controllable coating thickness, variable size, light weight, and low chlorine release potential, making it suitable for use in seawater
1, Chlor-alkali industry sodium chlorate electrolytic production
The chemical industry that extracts chlorine, hydrogen and caustic soda by electrolytic salt solution is called chlor-alkali industry, which is the largest sector in the modern electrochemical industry and occupies an important position in the national economy. In addition to the above, it can also make downstream products hydrogen chloride, sodium hypochlorite, chlorinated stone candle, Polyvinyl chloride (referred to as PVC Polyvinyl chloride polymer = PVC molecular structure), hydrogen peroxide and so on.The production of chlor-alkali can use pure saturated salt water as the electrolyte, titanium electrode as the anode, and iron mesh containing asbestos as the cathode, anode chamber produces chlorine gas, cathode chamber produces hydrogen and sodium hydroxide, which are widely used in various industrial production after purification. The application of titanium anode in chlor-alkali industry has made the chlor-alkali industry develop rapidly, chlorine evolution reaction has good electrocatalytic activity, mechanical stability and chemical stability, It has now become a product that cannot be replaced in the chlor-alkali industry.
2, electrolytic functional water
As a kind of treatment technology with good bactericidal effect, strong practicality and no pollution, it has received many people's favorite
① Hypochlorite produced by electrolysis can be used to kill bacteria..
② The use of 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 harmful acidic metabolites free radicals, enhance the constitution to prevent and improve disease resistance.
④ Acidic ionized water has the effect of inhibiting bacterial growth, disinfection and convergence, and the effect is the same as that of beauty astringent water, and the application of strong oxidation for sterilization and disinfection.
3, Production of sodium hypochlorite generator.
The electrolytic temperature of sodium hypochlorite should be maintained below 40° C. If the temperature is too high, NaClO will decompose, reduce the solubility of Cl2, which is not conducive to the formation of NaClO. The solution will be alkaline, and the anode O2 will increase, reducing the current efficiency of chlorine evolution. The electrode distance is selected from 3 to 10mm, and the reduction of the pole distance can reduce the groove pressure and power consumption. The current density is 13 to 20A/dm2 when using coated titanium electrodes. The power consumption of sodium hypochlorite generator is generally about 3.7~7kW·h/kg.
Chlorine dioxide generator, using a diaphragm electrolytic cell, electrolyzes sodium chloride solution, generates a mixture of gases including chlorine dioxide, which is dissolved in water to form a sterilization liquid. The molecular formula of sodium hypochlorite is ClO2, easily soluble in water, water decomposition, easy to react with water in water solubility is 5-8 times that of chlorine. Allowing it to dissolve in an alkali solution can form chlorite and chlorate.
Factory picture
Our factory & quipment
Products Description
Company: Baoji Dynamic Trading Co., Ltd
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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