Platinum Coated Electrodes
Platinum due to its high conductivity and low consumption, platinum is an anode material. However, taken in to account its high cost, the use of platinum alone is not common. By cladding or electroplating a thin platinum layer on a low-cost substrate, platinum use becomes a more practical solution. In addition, this can also be used to extend the effective anode surface area. For this to function the substrate material must also have the ability to form an insulating oxide film under anodic conditions. The two most commonly used substrates in this case are titanium and niobium.
Platinized titanium anodes are manufactured with a titanium base structure, in the form of either plate, rod, wire, mesh or tube (or any shape as per request).
The electrical conductivity and corrosion resistance of niobium are superior to titanium as is the breakdown potential, which is much higher than that of titanium. However, niobium is more expensive. Titanium oxide has been reported to fail by breakdown at anodic potentials in the 10V range, while niobium films can withstand a breakdown voltage of up to 80V.
More than Twenty years of MMO-coated titanium anode manufacturing experience.Titanium/Niobium-based platinum plated anode process, using electroplating or brush plating process,the appearance is bright silver white, with the characteristics of large anode discharge current density and long service life. Titanium based platinum plated anode process, using electroplating or brush plating process,the appearance is bright silver white, with the characteristics of large anode discharge current density and long service life.
Platinum coated titanium anode processing process
The processing process of platinum-coated titanium anode typically involves the following steps:
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- Surface Preparation: The titanium substrate is thoroughly cleaned to remove any impurities, oxides, or contaminants from its surface. This is usually done through mechanical grinding, polishing, and chemical etching.
- Activation: The cleaned titanium surface is activated to enhance its adhesion with the platinum coating. This may involve treating the surface with specific chemicals or electrochemical processes.
- Coating Application: Platinum is deposited onto the activated titanium surface. Common methods for coating application include electroplating, thermal spraying, or physical vapor deposition (PVD).
- Annealing: After the coating is applied, the anode may undergo annealing at a controlled temperature to improve the coating’s microstructure and adhesion.
- Quality Control and Testing: The platinum-coated titanium anode is inspected for coating uniformity, thickness, and adhesion. Electrical conductivity and electrochemical performance tests are also conducted to ensure its quality and functionality.
It’s important to note that the specific details and parameters of each step can vary depending on the requirements of the application and the equipment and techniques available.
How to ensure the quality and performance of platinum coated titanium anode?
- Substrate Preparation: Ensure the titanium substrate is meticulously cleaned and properly pretreated to remove impurities, oxides, and surface contaminants. A smooth and clean surface promotes better adhesion of the platinum coating.
- Coating Method Selection: Choose an appropriate coating technique such as electroplating, physical vapor deposition (PVD), or thermal spraying, based on the specific requirements and characteristics of the application.
- Control of Coating Parameters: During the coating process, precisely control parameters such as coating thickness, current density (in electroplating), temperature, and pressure to achieve a uniform and consistent coating.
- Annealing and Heat Treatment: Post-coating annealing or heat treatment can optimize the microstructure of the coating, improving its mechanical and electrochemical properties.
- Quality Inspection: Implement rigorous quality inspection procedures including visual inspection for coating defects, measurement of coating thickness using techniques like X-ray fluorescence or scanning electron microscopy (SEM), and electrochemical tests to evaluate the anode’s performance.
- Material Purity: Use high-purity platinum and titanium materials to minimize the presence of impurities that could affect the anode’s performance and durability.
- Environmental Control: Maintain a controlled environment during the manufacturing process to prevent contamination and ensure consistent results.
- Long-Term Testing: Conduct long-term electrochemical tests under simulated operating conditions to assess the anode’s stability and performance over time.
- Supplier Selection: Choose reliable suppliers of materials and equipment to ensure the quality and consistency of the manufacturing process.
