1. Technical characteristics: Excellent anti-corrosion performance; long service life of electrodes; high current density and high current efficiency. Operating current density: 10000A/M2 belongs to the oxygen evolution type anode based on industrial pure titanium.
2. High catalytic activity: Platinum-plated electrode is a high peroxygen potential (1.563V relative to mercurous sulfate) electrode, which is well known. The MMO anode is a low oxygen evolution overcharge (1.385V relative to mercurous sulfate) electrode, and the oxygen evolution area of the anode is easier to evolve oxygen. As a result, the cell voltage is generally low during electrolysis, which uses less energy. This phenomenon has been clearly reflected in the alkaline copper-plated wall after the copper foil.
3. No pollution. MMO This oxide is a fairly stable oxide and the anodic coating is a ceramic oxide of the precious metal iridium. It is almost insoluble in any acid or alkali, and the oxide coating is about 20-40 μm. The overall coating oxide content is relatively small. Therefore, the MMO anode will not pollute the electroplating solution, which is basically the same as the platinum-plated electrode.
4. High-cost performance: The price of MMO anode is about 80% of that of platinum-plated electrodes. MMO electrodes have better electrochemical stability in alkaline electroplating copper electrolytes and have maintained the same service life as platinum-plated electrodes (coating thickness 3.5mm). At the same time it has excellent electrolytic activity and durability.)
5. Chlorides are present in this galvanic environment in the sulfuric acid electrolyte. Using a dimensionally stable anode prevents this phenomenon and allows insoluble anode technology to successfully achieve performance advantages in this application.
6. Anodes are less maintenance. There is no need to stop production for cleaning and replenishing anodes, changing anode bags, and re-coating anodes (increased productivity and reduced manual labor).
7. The life of the insoluble anode depends on the type, working current density, and contact with various electroplating chemicals; because copper ions are easy to concentrate on the edge of the hole (high current density area) and accumulate rapidly, while the central part of the hole (that is, low current Density area) the accumulation speed is relatively much slower. This results in a very uneven distribution of copper accumulation: a behavior known as "dog bone". Operating at moderate current densities results in dog bone, at lower current densities the phenomenon of barrel cracking occurs, and at higher current densities the phenomenon occurs. The burning phenomenon occurs. It undoubtedly has a heavy impact on electroplated circuit boards. The use of platinum-titanium insoluble anodes in sulfuric acid electrolytes led to reverse pulse plating anodes. Chlorides are present in this current environment and after a period of time will cause the platinum layer to peel off.
