Base metal and coating are the two components that make up MMO anodes. Titanium is used as the base metal because it possesses the qualities required for coating, such as resistance to harsh chemical conditions and suitable conductivity. Titanium’s small weight and versatility in forms such as tubes, ribbons, wires, mesh, and sheets are further advantages.
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MMO anodes can be applied to the base metal in a variety of methods and have a very thin coating (just a few microns). Depending on the intended use, these coatings may include a combination of two or more metal oxides, including titanium, iridium, tantalum, and ruthenium oxides.
The excess potential for releasing anodic chlorine and oxygen is significantly reduced when this coating is used as an activation agent. Given its lifespan, the catalyzed coating of MMO anodes reduces anode resistance, which lowers consumption rates. MMO anodes have a very low consumption rate of less than 1 mg/year, depending on the application and environmental factors.
In impressed current cathodic protection systems, these anodes are employed to prevent metal base structures from corroding. Bridges, maritime constructions, offshore platforms, storage tank bottoms, buried or submerged pipelines, and reinforced concrete structures are among the many applications for these anodes.
In general, MMO anodes offer the following advantages:
Adaptability
The ability to create anodes in various shapes
Simple portability
Lightweight
increased output current
extended lifespan even at extremely high current densities
Stability of dimensions
The potential for recoating
Dependability
MMO Anode Benefits and Drawbacks: Essential Information
Mixed Metal Oxide (MMO) anodes have become more popular in a variety of industrial applications because of their special qualities and benefits in terms of performance. Like any technologies, they have advantages and disadvantages. The purpose of this post is to discuss the benefits and drawbacks of MMO anodes and offer suggestions for choosing the best one for your project.
Benefits of MMO Anodes
Durability & Longevity: Because MMO anodes are made to last, they require less replacements over time.
High Current Capacity: Capable of handling high current outputs with efficiency, ideal for a variety of applications.
Corrosion Resistance: Their specific composition provides exceptional resistance, particularly in harsh conditions.
Low Overpotential: In electrolytic operations, this results in energy savings.
Design Flexibility: Available in a range of sizes and forms to meet a variety of purposes.
Environmentally Friendly: They don’t emit any heavy metals or dangerous toxins when they’re in operation.
MMO Anode Drawbacks
Initial Cost: More expensive up front than certain options, but frequently justified over time.
Needs Skilled Installation: For best results, installation must be done correctly.
Sensitivity to Current Density: They may be susceptible to variations in current density.
Possibility of Passivation: Under certain circumstances, there is a chance that the anode surface will turn passive.
Choosing the Proper MMO Anode for Your Task
Identify the Use: Determine if it’s for electrochlorination, cathodic protection, or another particular purpose.
Evaluate the Environment: Take into account variables such as temperature, pH, and possible pollutants.
Assess Current Density: Comply with the particular current density requirements of your project.
Think About Physical Dimensions: Choose the right size and form based on the space and design.
Verify the anode’s certifications to make sure it satisfies applicable industry requirements.
Establish a Budget: Take into account both the original purchase price and the entire lifespan cost.
Consult with Experts: When in doubt, get guidance from subject-matter experts.
Examine Previous Projects: Case studies can provide important information about possible performance.
