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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

How Sulfur Smell in Hot Water Occur? The sulfur smell(also named rotten egg odor) is caused by hydrogen sulfide (H2S) gas. How does this sulfur smell occur? The hot water heater tanks is an ideal environment for the production of hydrogen sulfide gas. When the water heater tank is filled with water, the excess electrons provide the energy needed by the sulfate-reducing bacteria to produce H2S gas.The sulfatereducing bacteria thrive in the temperature range of most water heaters. In addition, the wat

What are the DSA Anode Applications in the Electrochemistry Field? “dimensionally stable anode” (DSA) anodes are titanium anodes coated with mixed metal oxide elements such as platinum group metals, iridium, ruthenium, platinum, rhodium, tantalum, etc. The electrochemical performance and lifetime of the DSA  anode could be determined by the electrode production method such as the pre-treatment of titanium surface, coating thickness, the optimal composition of novel metal oxide, and heat treatment. &