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What Factors Affect the Efficiency of MMO Anodes? Mixed Metal Oxide(MMO) anodes are featured for low electrical resistance, good electrochemical activity, corrosion resistance, and dimensional stability. Low electrical resistance reduces energy consumption in the electrochemical process.   The MMO anode properties are mainly determined by pretreatment of the base metal before it is coated by electrochemically active oxide layer, heat treatment temperature, amount of metal per deposition cycle, and thickness of the coating l

What is MMO Anode and its Application? MMO anodes are metal substrate coated with noble metals or metal oxides function as an anode in the electrochemical process. The base metal is working as an electric conductor and gives mechanic form and structural strength and electrochemically active coating is working as a current feeder to the solution. Noble metal anodes are coated with platinum or platinum alloys and metal oxide anodes are mainly coated with mixtures of ruthenium oxide, iridium oxide, cobalt oxide, tin oxide, and vari

What Anodes are Used for Electrowinning of Metals? The anode material in the electrowinning of metals from sulfuric acid solution has traditionally been lead because of its high corrosion resistance. During use, the lead surface is oxidized resulting in an electrochemically active PbO2 layer. This layer prevents further oxidation and provides an electrochemically active and conductive material passing the anodic current. Most of the oxygen evolving anodes for electrowinning have focused on lead anodes since 1990s. Electrowinning

What is Electrowinning of Base Metals? Electrowinning is one of the main methods to recover base metals from solutions. Electrowinning is commonly used in the production of copper, zinc, and nickel, but it is also applied in the production of cobalt and noble metals. In electrowinning metal is dissolved from the starting material using chemical or electrochemical leaching, the solution is purified from impurities that can disturb the deposition process, and metals are recovered using direct current. The deposition substrate can