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Titanium Plate Pretreatment
Titanium plate surface is easy to form a layer of passivation of the oxide film, the conductivity is poor, and the titanium plate in the process of easy to contaminate the oil, titanium plate will lead to decreased conductivity, resistance increases, while the coating can not Titanium plate surface close together. Therefore, in order to improve the conductivity of the electrode, Titanium Plate so that the coating and the substrate more closely, and in order to remove the titanium plate during the processing of stains, etc., to ensure the electrochemical performance of the electrode and coating activity, titanium matrix need to make the necessary deal with.
① with 180 mesh sandpaper size 70mm × 30mm × 2mm titanium plate edge part of the smooth, to eliminate the edge effect of the electrode.
② with 600 mesh yarn will be the surface of the titanium plate polished bright, so that the titanium plate surface oxide can be completely removed.
③ With 120 mesh roving in the two vertical direction of the grinding, the main grinding electrode 30mm × 30mm area (the degradation of organic matter occurred mainly in this area), the purpose is to increase the titanium plate surface roughness, improve its mechanical adhesion , Titanium Plate The surface of the titanium substrate after grinding will form a hole, so that the electrocatalytic activity of the oxide in the coating is attached to the hole to produce a special fit, so that the coating on the substrate adhesion more closely to prevent the coating off.
RuCl3 and H2IrCl6 were dissolved in 1/3 of the total ethanol solution (2.7 mL) at a molar ratio of Ru: Ir: Ti: 15: 15: 70, and the mixture was mixed by ultrasonic vibration. RuCl3, H2IrCl6): citric acid: ethylene glycol = 1: 3: 14 Weigh citric acid and ethylene glycol, dissolve in another 1/3 of the ethanol solution, mix with ultrasonic vibration to mix and mix the mixture solution Samples of RuCl3 and H2IrCl6 were slowly added dropwise, and then water and hydrochloric acid with a volume ratio of 1: 1 were added to the mixed solution. Titanium Plate After 4 hours of shaking, a colloidal colloidal solution was obtained. Another 1/3 of anhydrous ethanol According to the above stoichiometric ratio of tetrabutyl titanate mixed, ultrasonic vibration stirring, followed by adding a volume ratio of 1: 1 hydrochloric acid and water, shake 1 h to get TiO2 sol; and then under the conditions of ultrasonic vibration stirring TiO2 sol Slowly drip into RuCl3, H2IrCl6 sol solution, shake for 1 h after the sol placed for 38 h for smear. The coating liquid was coated on the treated titanium substrate, the infrared lamp was baked at 100 ℃ for 10 min, Titanium Plate then oxidized at 440 ℃ for 8 min in the muffle furnace. After evacuation to room temperature, the coating was repeated 16 times. Finally, annealed at the same thermal oxidation temperature for 1 h, the coating is oxidized sufficiently. RuCl3, H2IrCl6, and TiCl3 were dissolved in isopropanol and HCl solution at a volume ratio of 1: 1, Titanium Plate and the mixture was sonicated for 15 min at a molar ratio of Ru: Ir: Ti: 15: 15: For the smear, the coating solution was coated according to the same coating process as described above, and the content of the noble metal used in the two processes was about 10 g / m2.
Along with our country petroleum, chemical and other industries of equipment demand is higher and higher, and the overall level of the manufacturing of rapid ascension, along with the domestic demand and international industrial transfer of the "double motivation", the titanium industry in our country from the market for a long time, will continue to maintain fast and stable growth momentum.Titanium strip as the important pillar of titanium, production will be further expanded.The production enterprises must seize this opportunity and gradually transfer to new products and obtain greater development space.