Titanium anode (MMO) is prepared by sintering titanium substrate coated with noble metal iridium salt at high temperature, and is widely used in electro-plating (copper/gold electro-plating to satisfy high demand of deep hole in circuit board industry), electrolysis and other wet-process metallurgy industries. The electrode is prepared and applied in a comparatively mature way, and has been applied for 40 years. In compared conventional with platinum-plated electrode, the titanium anode has the following advantages:
1. Technical characteristics: high current, high efficiency, excellent bacterium and corrosion resistance, and long service life; the titanium anode is applicable to comparatively high current density; the operating current density is not greater than 10, 000A/m2, belonging to oxygen evolution type anode taking industrial pure titanium as base layer; 
2. It is well-known that catalysis activity of the titanium anode is high; different from platinum-plated electrode which is an electrode having high oxygen evolution over-potential (1.563V, compared with mercurous sulphate), the MMO anode is an electrode with low oxygen evolution over-potential (1.385V, compared with mercurous sulphate), which makes it easy to realize oxygen evolution in anode oxygen evolution zone; in the process of electrolysis, the bath voltage is comparatively low to save electric energy, which is remarkable in post-treatment of alkaline copper-plated wall in the copper foil; 
3. No pollution: MMO anode coating is ceramic oxide of noble metal iridium, which is a comparatively stable oxide and is nearly insoluble in any acid and alkali; the oxide coating is about 20-40 microns, and the integral coating oxide amount is comparatively low, which avoids pollution to the electro-plating liquid as the platinum-plated electrode;
4. High cost performance, and same service life as platinum-plated electrode (with coating 3.5 mm thick); price of the MMO anode is about 80% of the platinum-plated electrode; MMO anode shows excellent electro-chemical stability in alkaline electro-plating copper electrolysis liquid, and has excellent electrolysis activity and durability. From aspect of cost, the MMO anode is more economic compared with PT electrode;
5. Pulse periodical reverse (PPR) is required in application of copper in printed circuit, but platinum-plated titanium insoluble anode is forbidden (platinum layer will strip off after a duration with presence of chloride in the sulphuric acid electrolysis liquid); the anode with stable size can avoid such phenomenon, and can present performance advantage of insoluble anode technology in the application;