Reasons and characteristics of titanium anode favored by the market

The full name of titanium anode is titanium base metal oxide coated titanium anode, also known as DSA anode (Dimensionally Shape Stable Anode). It uses titanium as the base material and has a precious metal coating on the titanium plate. Titanium anode, titanium coated anode plate is made of ruthenium, iridium, tantalum and other precious metal salts coated on titanium substrate by high temperature sintering, which is widely used in electroplating (high copper plating and electroplating in deep hole PCB industry), electrolytic synthesis, hydrometallurgy, aluminum foil, cathodic protection, wastewater treatment, sanitation and disinfection, regeneration and recycle of copper etching solution, and titanium anode has been quite mature in preparation and application.

Titanium anode as a titanium base metal oxide coated anode, than the general electrode materials to have good catalytic properties, small changes, corrosion resistance, mechanical strength and processing performance, popular in many areas. And develop its so hot market, but also thanks to the following reasons:

Titanium anode long service life, chlorine and alkali corrosion in the process of metal anode diaphragm in chlor-alkali industrial production. According to www.lh-ti.com介绍, compared with graphite anode only 8 months of use, titanium anode life expectancy is more than 6 years. The utility model can overcome the dissolution problem of graphite anode and lead anode, avoid the pollution of electrolyte and cathode products, and improve the purity of metal products. Due to the adoption of metal anodes, the chlorate electrolyzer can operate at high temperature and high current density. The adoption of metal anode can improve the structure of electrolyzer, reduce the consumption of electric energy, and accelerate the chemical reaction of hypochlorite acid in hypochlorite, thus improving the production performance.

Second, greatly improve the current density of the diaphragm chlor-alkali production process, graphite anode current density for 8A / dm2 titanium anode can be increased several times, such as 17A / dm2, in the electrolysis shop, electrolysis tanks under the same conditions, the output can be increased by 1 times, to increase the capacity of a single tank, effectively improve labor productivity. A force titanium industry staff said that the use of titanium anode is more appropriate in high current density electrolysis. In addition, the titanium anode size is stable, and the distance between electrodes does not change during electrolysis.

Third, the working voltage is low, so the power consumption is small, which can save energy consumption, and the power consumption can be reduced by 10% to 20%. The main reasons for the low working voltage of titanium anode are: 1) The overpotential of active coated titanium anode to chlorine and oxygen is low. Electrolysis production of chlor-alkali brine, titanium anode over-potential for chlorine is low, 1A/cm2 is 140mV lower than graphite anode; 2) it can reduce the "bubble shielding effect", the anode surface metal bubble generation is small, and the discharge is fast, so that the degree of expansion between the electrodes is low, and the inter-polarization ohmic voltage drop is about 700mV. the diameter of bubbles is about 3mm; 3) it can reduce the working voltage of anode, which is about 10-20%. 3mm; 3) reduce the resistance of the anode structure; 4) shorten the distance between electrodes.

The design concept and operating conditions can be improved and energy consumption can be reduced by using DSA, mercury and diaphragm salt bath. low overpotential characteristics of DSA, electrode surface and electrode bubbles are easy to exclude. It is reported that in the 1960s, the world salt electrolysis industry consumes about 150 billion degrees of electricity per year, and the use of metal anodes can save about 300 million degrees of energy per year. At the same time, titanium anode is light weight, which can reduce labor intensity.